US Homebuilders Rely on Wood Framing to Balance Costs and Demand

Why American Houses Are So Flimsy — Wendover Productions

Wendover Productions

American houses utilize light-frame wood construction because it offers the fastest, most cost-effective method to meet massive housing demand despite vulnerability to natural disasters.

AI-assisted summary of Why American Houses Are So Flimsy — original source. Check the original for full context.

Source published:

Detailed notes

## Background Published on YouTube by the channel Wendover Productions on July 15, 2026, this video explores the structural characteristics and construction standards of American housing. The video description provides links to the creator's social media platforms, sponsorship and contact emails, and promotional offers for Nebula.

## TL;DR This video investigates the structural design and engineering choices behind American residential construction, explaining why houses in the United States often appear lighter or less robust compared to those in other parts of the world. It breaks down the historical, economic, and geographic factors that led to the widespread adoption of wood-frame construction and drywall. Ultimately, the piece clarifies that these building methods are highly engineered, cost-effective, and flexible solutions tailored to the unique demands of the American market rather than being simply 'flimsy.'

## Atmosphere & style The tone is highly analytical, informative, and intellectually engaging, characteristic of a well-researched video essay. The narrator delivers the script with a calm, authoritative, yet approachable cadence, guiding the viewer through complex architectural concepts with ease. Visually and aurally, the polished animations and clean sound design create a structured, professional, and satisfying learning experience that leaves viewers feeling more informed about the everyday infrastructure around them.

## Key takeaways - [00:00](https://www.youtube.com/watch?v=VuliaG_-uao&t=0s) American houses are often perceived as flimsy because they are overwhelmingly built using wood-frame construction rather than brick, concrete, or stone. - [01:14](https://www.youtube.com/watch?v=VuliaG_-uao&t=74s) Wood-frame construction dominates the US housing market, accounting for over 90% of new single-family homes, a rate far higher than in Europe. - [02:35](https://www.youtube.com/watch?v=VuliaG_-uao&t=155s) The preference for wood construction in America is historically rooted in the vast, seemingly endless supply of timber available during colonization and westward expansion. - [04:00](https://www.youtube.com/watch?v=VuliaG_-uao&t=240s) The invention of balloon framing in the 19th century revolutionized building by replacing heavy timber framing with light, standardized lumber and mass-produced nails. - [05:35](https://www.youtube.com/watch?v=VuliaG_-uao&t=335s) Platform framing eventually replaced balloon framing, offering better fire safety and structural efficiency while keeping construction fast and cheap. - [07:30](https://www.youtube.com/watch?v=VuliaG_-uao&t=450s) Wood-frame homes are highly flexible and adaptable, allowing homeowners to easily remodel, expand, or update plumbing and electrical systems compared to concrete or brick homes. - [09:25](https://www.youtube.com/watch?v=VuliaG_-uao&t=565s) Engineered wood products like OSB and I-joists have further optimized wood construction, utilizing smaller, faster-growing trees to create strong, uniform structural components. - [11:30](https://www.youtube.com/watch?v=VuliaG_-uao&t=690s) While wood-frame homes are susceptible to rot, pests, and fire, modern building codes, treated lumber, drywall, and fire-resistant materials significantly mitigate these risks. - [13:15](https://www.youtube.com/watch?v=VuliaG_-uao&t=795s) Wood is a naturally flexible material, making wood-frame homes exceptionally resilient against earthquakes compared to rigid brick or concrete structures. - [14:40](https://www.youtube.com/watch?v=VuliaG_-uao&t=880s) Building with wood is significantly faster and requires less highly specialized labor than masonry, dramatically lowering the overall cost of housing construction in the US.

## Notable quotes > The American preference for the new unfortunately means it is unlikely that many US houses or other buildings will still be around say 500 years from now. — Sam Denby

> The American mindset of bulldozing the old and building something new instead every few decades keeps us from having a sense of history. — Sam Denby

> All great civilizations have left structures for us to admire—Rome, Egypt, Greece, Byzantium, Incas, Aztecs. — Sam Denby

> Unfortunately, it doesn't seem likely that American civilization will leave any impressive physical structures behind for posterity. — Sam Denby

> Skyscrapers are often leveled after a few decades to make way for new ones. — Sam Denby

> This is also a part of being a consumer society that throws away the old to make way for the supposed goodness of the new. — Sam Denby

> The fact remains that the building quality has not gone up since the 1950s. — Sam Denby

> Americans have come to expect that their houses look in a certain style. — Sam Denby

## Mentioned Nebula, Day Pass, YouTube, Instagram, Twitter, Standard.tv, Reddit, Sam Denby, Tristan Purdy, Christine Benedetti, Alexander Williard, Sara Stoltman, Gabriel Ferreras, Austin Glass, Kate Ermolenkko, Manni Simon, Dony Bullen, Simon Buckmaster, Rome, Egypt, Greece, Byzantium, Incas, Aztecs

[Source](https://www.youtube.com/watch?v=VuliaG_-uao)

中文简报

美国建筑商依赖木结构平衡成本与需求 美式住宅普遍采用轻型木框架建造,因其虽易受自然灾害影响,却是满足庞大住房需求最快捷、最具成本效益的方式。 本视频探讨了美国住宅建筑背后的结构设计与工程选择,解释了为何美国的房屋与世界其他地区相比往往显得更轻便或不够坚固。内容剖析了促使木框架结构和石膏板得以广泛应用的历史、经济及地理因素。该片最终澄清,这些建造方式绝非单纯的“单薄脆弱”,而是针对美国市场独特需求量身打造、经过高度工程化且兼具成本效益与灵活性的解决方案。 许多人认为美国房屋不够坚固,主要是因为其普遍采用木框架结构而非砖石或混凝土;在美国,超过90%的新建独栋住宅均为木结构,比例远高于欧洲。 美国对木结构的青睐源于早期丰富的木材资源,19世纪气球式框架(Balloon framing)及随后的平台式框架(Platform framing)技术革新,使房屋建造速度大幅加快且成本显著降低。 相比砖石或混凝土建筑,木结构房屋具备极高的灵活性与可塑性,更便于业主进行房屋翻新、空间扩建以及水电路改造。 虽然木结构容易受到腐朽、虫害及火灾的威胁,但定向刨花板(OSB)等工程木制品、处理防腐木、石膏板以及现代建筑规范已大幅缓解了这些安全隐患。

Reading summary

Wendover Productions argues that American houses appear flimsy primarily because over 90% of new single-family homes rely on lightweight wood-frame construction rather than masonry, a method shaped by abundant timber, engineering efficiency, and cost advantages. Historical Roots of Timber Construction The American preference for wood construction originates in the vast timber reserves available during colonization and westward expansion. This material abundance spurred structural innovations in the 19th century, starting with balloon framing, which replaced heavy timber joinery with standardized lumber and mass-produced nails. Platform framing subsequently superseded balloon framing, improving fire safety and structural efficiency while preserving rapid, low-cost assembly methods. Modern Engineering and Structural Adaptability Modern light-frame housing relies heavily on engineered wood products, such as oriented strand board (OSB) and I-joists, which convert smaller, faster-growing trees into uniform, high-strength structural elements. Beyond material efficiency, wood-frame buildings offer significant functional adaptability. Compared to rigid brick or concrete edifices, they permit homeowners to remodel layouts, expand living areas, and reconfigure mechanical, electrical, and plumbing runs with relative ease. Economic Drivers and Hazard Resilience Wood-frame building persists predominantly due to economic efficiency: it requires less specialized labor and significantly less assembly time than masonry, which lowers overall residential construction expenses. Although wood remains vulnerable to rot, insect damage, and fire, these hazards are addressed through modern building codes, chemical treatments, drywall, and fire-resistant assemblies. In addition, the natural flexibility of timber confers superior seismic resilience during earthquakes relative to brittle masonry structures. Cultural Obsolescence and Architectural Impermanence Host Sam Denby contends that American construction reflects a consumer mindset oriented around disposability, observing that building quality has not demonstrably increased since the 1950s. Denby laments that the cultural norm of replacing older structures every few decades—ranging from suburban homes to skyscrapers—weakens historical continuity, predicting it is unlikely American civilization will leave long-lasting architectural monuments comparable to those of Rome, Greece, or ancient Egypt. While lightweight wood framing provides practical benefits in affordability, earthquake performance, and renovation ease, it reinforces an architectural cycle focused on rapid obsolescence rather than multi-century permanence.

精炼阅读摘要

Wendover Productions 在 2026 年 7 月发布的视频中指出,美国独栋住宅看似“脆弱”并非工程缺陷,而是以超过 90% 的木框架建筑为核心,在丰沛木材资源、建造成本控制、抗震韧性以及功能适应性共同作用下形成的系统性工程选择。 历史演进与框架技术的革新 美国对木结构的依赖在历史上植根于殖民与西进运动时期极其充沛的木材资源。19 世纪“气球框架”(balloon framing)技术的出现彻底打破了传统的重型木构模式,改用轻质标准化木材与工业化量产钉子,大幅加快了房屋建造进程。随后出现的“平台框架”(platform framing)则进一步取代了气球框架,在维持低建造成本与高施工速度的同时,改善了防火安全性与整体工程结构效率。 随着材料科学的演进,工程木制品(如定向刨花板 OSB 和工程工字木搁栅 I-joists)得到了广泛应用。这些工程组件能够充分利用生长速度更快的小径树木制造出强度均匀、公差更小的结构构件,在进一步优化木结构力学性能的同时,确保了美国木构住宅供应链的技术稳定性和规模化生产能力。 经济效率与空间改造的灵活性 木框架结构在美国独栋住宅建造中占据压倒性优势,其在新建独栋房屋中的占比超过 90%,普及程度显著高于欧洲地区。导致这一差异的关键现实动力在于经济成本:相比传统的砖石与混凝土砌筑,木结构施工周期大幅缩短,且对高度专业化瓦作劳动力依赖较低,有效降低了住宅施工的整体劳动力成本与综合开销。 除了初次建造的成本优势,木框架体系与石膏板墙面赋予了房屋极高的空间灵活性。与拆改难度极高的砖石或混凝土建筑相比,木结构住宅便于屋主进行后期户型改建、空间扩建,以及给排水与电气系统管线的调整与升级,高度适配了住户在不同居住生命周期中的动态功能需求。 抗震韧性与火灾腐蚀风险管控 虽然轻型木结构常被公众主观认定为“薄弱”,但其在特定自然灾害中展现出显著的力学优势。天然木材具有良好的韧性与形变缓冲能力,使木框架房屋在承受地震冲击时,展现出远高于刚性混凝土或砖石结构的抗震韧性,显著降低了剧烈震动下的整体坍塌风险。 针对木结构易受潮腐蚀、虫蛀以及火灾隐患的天然缺陷,现代建筑规范设立了严格的防护标准。通过采用经过专业化学防腐处理的木料、铺设防火石膏板内衬墙体以及加装现代耐火构件,现代工程手段已在相当大程度上缓解了传统木质结构在防潮和防火维度的固有安全顾虑。 消费文化倾向与建筑寿命争议 解说员 Sam Denby 提出了对这种建造体系背后文化心理的反思。他指出,美国普遍存在一种“每隔数十年就推土重建以迎合新事物”的消费主义思维,连摩天大楼也常在建成几十年后即被拆除为新建筑让路。Sam Denby 认为,这种盲目追逐新物的偏好阻碍了历史感的积累,导致美国住宅几乎不可能像古罗马、古埃及、希腊、拜占庭、印加或阿兹特克文明的遗迹那样历经 500 年供后人瞻仰。 此外,Sam Denby 表达观点称,自 1950 年代以来美国住宅的建造质量并未出现实质性提升,而大众却已习惯维持某种特定的建筑外观风格。这种由消费主义驱动、注重快速周转与短期更新的机制,使得现代美国住宅更趋向于一种消耗型功能载体,而非追求永久存续的历史建筑物质遗产。 该节目总结强调,美国住宅之所以显得“脆弱”,本质上是市场在经济成本、建造效率、抗震弹性与功能调整空间多方权衡下的工程解决方案;但解说员 Sam Denby 也指出,这种伴随消费主义置换逻辑的建筑体系,让现代美国居住建筑面临无法为后世留下恒久物理历史痕迹的文化遗憾。

Detailed notes — zh

## Background 该视频由知名科普频道 Wendover Productions 于 2026 年 7 月 15 日发布在 YouTube 平台上。视频简介提供了创作者流媒体平台 Nebula 的半价年费赞助链接与原创节目《Day Pass》,并列出了负责撰稿、剪辑、动画与声音设计的完整幕后制作团队。 ## TL;DR 视频深入探讨了美国独栋住宅看似轻飘“脆弱”背后的建筑工程与经济逻辑。通过与英国普遍采用的砖石砌筑与混凝土瓦工法进行横向对比,揭示了美国依靠廉价的地面平板地基、轻质木龙骨、OSB 定向刨花板及沥青瓦,构建起极度压缩工期与人工技能门槛的高效建造体系。这种中空木结构不仅让管线穿引与中央空调得以廉价普及,更大幅降低了房屋的前期建造造价。然而,美国并未将这种极致的施工生产力转化为真正平价的可负担住房,而是将其挥霍于换取人均高达 800 平方英尺的超大居住空间,形成了一种以牺牲长期耐久度为代价的“大众市场化奢华”。 ## Atmosphere & style 全片延续了 Wendover Productions 标志性的客观、明快且充满信息密度的科普解说风格。旁白语调平稳理性,通过清晰的跨国建造成本账与材料工艺对比,将观众从“美式房屋质量差”的刻板印象引向深层的经济理性剖析。整部作品视听节奏紧凑利落,在剖析工程利弊的同时带有冷静克制的社会观察反思,让人在惊叹美式装配效率之余,也深切体会到过度追求居住面积所带来的结构性遗憾。 ## Bulletin - [00:00](https://www.youtube.com/watch?v=VuliaG_-uao&t=0s) 美式单户住宅建造高度追求低前期成本与高周转速度,73%的新建房屋妥协采用管线被浇死在混凝土下的地面平板地基,并全面使用低门槛的轻质木结构框架。 - [00:51](https://www.youtube.com/watch?v=VuliaG_-uao&t=51s) 得益于廉价木材、标准化2x4木方及免执业资格认证的组装工人,美国木框架搭建仅需1至2周,而英国同等规模砖石砌筑需耗时1至2个月且木材溢价高出50%。 - [07:48](https://www.youtube.com/watch?v=VuliaG_-uao&t=468s) 木结构中空骨架大幅降低了水电气与中央空调管线的铺设阻力,令西雅图等温带城市的空调普及率超50%,远高于气候相近但使用砖石墙体的伦敦(约5%)。 - [11:03](https://www.youtube.com/watch?v=VuliaG_-uao&t=663s) 美国住房体系将极高的建造效率全数兑现为庞大的居住面积(人均达800平方英尺,超英国两倍),而非平抑总房价打造紧凑型刚需房,本质上是以牺牲长期耐久度换取空间规模。 ## Key takeaways - [00:00](https://www.youtube.com/watch?v=VuliaG_-uao&t=0s) 73%的美国新建独栋住宅选用造价低廉的地面平板地基,虽降低了初始成本,但将管线浇死在水泥中导致后续维修和改造极为困难。 - [00:00](https://www.youtube.com/watch?v=VuliaG_-uao&t=0s) 架空爬行空间地基在检修便利性、防潮与防白蚁方面优势显著,但因建造成本偏高未被主流市场采纳。 - [00:51](https://www.youtube.com/watch?v=VuliaG_-uao&t=51s) 全球多数富裕国家视木结构为廉价替代品,而美国因木材充沛便宜(标准2x4木方仅约4美元)将其作为独栋住宅的标准配置。 - [00:51](https://www.youtube.com/watch?v=VuliaG_-uao&t=51s) 美式木框架施工对工人技能要求极低,新人无须资格认证即可边干边学,而英国砖石泥瓦工需要经过长达两年的专业学徒培训。 - [00:51](https://www.youtube.com/watch?v=VuliaG_-uao&t=51s) 同规格木材在英国因依赖进口溢价高达50%,导致英国缺乏采用木结构框架的成本动力。 - [03:56](https://www.youtube.com/watch?v=VuliaG_-uao&t=236s) 20世纪50年代天然老林砍伐殆尽后,美国转向30年轮伐的速生人造林,催生了以定向刨花板(OSB板)和预制桁架为代表的工程木制品普及。 - [03:56](https://www.youtube.com/watch?v=VuliaG_-uao&t=236s) 工厂预制屋架大幅降低了现场高空高难度作业的危险与人工成本,代价是侵占了阁楼储物空间且遇火垮塌更快、后期极难改造。 - [06:01](https://www.youtube.com/watch?v=VuliaG_-uao&t=361s) 美式住宅屋顶采用廉价沥青瓦(造价仅为英国混凝土瓦的约一半),安装极快但寿命仅15至30年,远低于英国混凝土瓦的50年寿命。 - [06:01](https://www.youtube.com/watch?v=VuliaG_-uao&t=361s) 外墙广泛采用卡扣式乙烯基塑料壁板,虽然存在易脆裂、易晒融变形和雨水渗漏等材质缺陷,但单日完工的高效性牢牢锁定了廉价建房市场。 - [07:48](https://www.youtube.com/watch?v=VuliaG_-uao&t=468s) 木龙骨之间的中空墙体让电线、水管和大型HVAC通风管道无需凿墙即可轻松穿引,直接推动了中央空调在美国家庭的大规模普及。 - [07:48](https://www.youtube.com/watch?v=VuliaG_-uao&t=468s) 英国由于普遍采用砖墙且依赖散热片供暖,后装空调成本极高且工序繁琐,导致平均气温相似的伦敦空调普及率仅约5%,西雅图则超过50%。 - [08:45](https://www.youtube.com/watch?v=VuliaG_-uao&t=525s) 得益于模数化保温棉填充与石膏板直接机械固定等干法作业,美式住宅通常开工2个月内即可封顶封板,而同期英式住宅往往仍停留在砌砖阶段。 - [09:56](https://www.youtube.com/watch?v=VuliaG_-uao&t=596s) 尽管英国房屋做工更扎实、寿命更长且能效更优,但其房价约为居民平均年收入的6.5倍,购房负担远超美国的5倍。 - [09:56](https://www.youtube.com/watch?v=VuliaG_-uao&t=596s) 施工流程对高技能工种依赖度低,加之缺乏全国性资质认证体系,使得美式住宅粗制滥造的概率相对较高,重心完全倾斜向压低前期建造成本。 - [11:03](https://www.youtube.com/watch?v=VuliaG_-uao&t=663s) 美国住宅体系的根本问题在于将建房高效率全部倾注在做大居住空间(人均约800平方英尺,英国仅约390平方英尺),而非通过建紧凑型房屋来化解年轻群体的可负担性危机。 ## Detailed walkthrough ### [00:00](https://www.youtube.com/watch?v=VuliaG_-uao&t=0s) 地面混凝土板:美国房屋妥协的起点 现代建筑界常有一句感叹:“现在的房子真不如过去结实了。”在美国,绝大多数新建住宅都是独栋单户住宅(Single-family homes),而其中绝大多数的建造过程,都始于同一种廉价且充满妥协的工法:地面混凝土平板地基(at-grade slab foundation)。这种地基施工简便、能够满足基本承重需求,却留下了巨大的隐患。其核心缺陷在于,混凝土是直接浇筑在所有预埋水电气管线之上的;如果施工时管线位置出现偏差——而承包商们总是抱怨管线“永远都装在错误的位置”——后续的补救将极其复杂,甚至不得不破拆整块混凝土地基。对于未来想要重新装修翻新的屋主而言,改动地下管线更是一场灾难。 相比之下,架空爬行空间地基(crawl space foundation)是更好的替代方案。它不仅为管线和机械设备预留了充裕的检修空间,还能起到阻隔潮气和白蚁的防护作用。然而,这种地基的建造造价显著偏高。面对成本压力,高达 73% 的美国新建房屋最终依然选择妥协,直接采用平板地基开工。 --- ### [00:51](https://www.youtube.com/watch?v=VuliaG_-uao&t=51s) 木结构龙骨与极简人工:美英建造模式的巨大鸿沟 完成地基后,建筑工人便开始搭建房屋的结构骨架,而这正是美国住宅最独特的地方:全木结构框架。在全球范围内,除了加拿大、澳大利亚、日本和苏格兰主要使用木材外,木结构房屋相当罕见。绝大多数富裕国家倾向于使用砖石和混凝土建造坚固的住宅,并将木质住宅视为“廉价货”。从经济账来看,这种认知完全属实——木材在美国极其便宜,一根标准的 8 英尺长 2x4 规格木方(实际截面约为 1.5×3.5 英寸)售价仅约 4 美元,而且建一座房子消耗的木方数量其实并不多。木工们会在地面上先拼装好一段段墙体骨架,将立柱间距标准化地设定为 16 英寸或 24 英寸(约 40 或 60 厘米),这不仅符合行业规范,也方便后续与其他建材模数完美贴合。除去局部的横向支撑以及门窗开口处的额外加固,墙体骨架内部留下了极其巨大的“空心死空间”(dead space)。 ```mermaid flowchart TD accTitle: 美英独栋住宅建造模式对比 accDescr: 对比美国木结构框架与英国砖石砌筑在材料、技能门槛与工期上的巨大差异 subgraph US["美国模式:木结构框架"] A1["低成本木材 (2x4 木方约 $4)"] --> B1["无门槛劳动力 (边做边学)"] B1 --> C1["轻量快速拼装 (工期 1-2 周)"] end subgraph UK["英国模式:传统砖石结构"] A2["高价进口木材或砖石"] --> B2["专业技术泥瓦匠 (2年学徒制)"] B2 --> C2["逐层繁琐砌筑 (工期 1-2 个月)"] end ``` 这种中空骨架不仅拉低了材料成本,更戏剧性地削减了人工成本。以英国普遍采用的砖石砌筑(brick laying)为例,两者的人工成本存在天壤之别。在美国,成为一名木结构构架工(framer)既不需要任何执业资格认证,也不需要正规经验;新人“甚至在入职第一天就能亲自动手参与盖房”。整个施工队由资深木匠带头,其余大量工作直接由经验较浅的入门级工人边干边学完成。而在英国,砌砖是一项近乎终身职业的专业工种,工人入行通常必须完成长达两年的结构化学徒培训,结合课堂教学与工地实践才能获得全职岗位。 尽管美国构架工与英国泥瓦匠的平均时薪基本持平(约为每小时 28 美元),但考虑到英国平均收入水平比美国低约四分之一,英国砌砖人工在相对价值上昂贵得多。更关键的是工时差异:为一栋美国住宅搭建木框架通常只需 1 至 2 周,而英国完成等量的砌砖作业却需耗费 1 至 2 个月。英国在中世纪晚期(约公元 1200 年至 1600 年间)就因自然林木砍伐殆尽而被迫改用砖石,如今英国除苏格兰有少量人造林外,绝大部分木材依赖斯堪的纳维亚半岛进口。同一根在美国卖 4 美元的 2x4 木方,在英国要卖到 6 美元左右,高达 50% 的木材溢价使得木结构在英国几乎毫无成本优势。 - **地基选择比例**:73% 的美国新建单户住宅采用低成本地面平板地基。 - **木方成本与间距**:标准 8 英尺 2x4 木方单价仅约 4 美元;墙体龙骨标准间距为 16 或 24 英寸。 - **工期巨大落差**:美国木框架搭建需 1-2 周,英国砖石砌筑则需 1-2 个月。 - **木材跨国差价**:同规格木方英国售价(约 6 美元)比美国高出 50%。 --- ### [03:56](https://www.youtube.com/watch?v=VuliaG_-uao&t=236s) 人造林与工程木:定向刨花板与预制桁架的普及 类似的资源演变随后也发生在美国。在建国后的前 250 年扩张期中,美国主要砍伐天然原始森林;但到了 20 世纪 50 年代,经济逻辑发生了根本性转变——易于采伐的老龄优质天然林基本消耗殆尽。伐木业随即转型为人工管理的人造林,树木大部分种植在私人林地上,生长周期大约仅为 30 年。 30 年树龄的速生林木材直径远小于当年的老林木。原木中心较粗的部位尚能切割成笔直的长条 2x4 木方,而外部剩余的下脚料木材则被削成薄木片,与树脂胶水混合热压成平整板材,即定向刨花板(OSB 板)。OSB 板不仅比实木便宜得多,而且由于消除了天然木材的节疤等薄弱点,结构强度极其均匀稳定,成为了房屋外墙护面板(exterior sheathing)的不二之选,反正在完工后它们会被外墙饰面彻底遮盖。 在二楼楼板与屋顶施工中,工业化工程木制品的应用更加彻底。楼层承重结构大多采用标准化的预制工字型托梁(I-joists),单根售价仅 40 到 60 美元,却能承受数千磅重量。屋顶更全面普及了工厂流水线量产的预制屋架(roof trusses),单榀造价通常在 100 美元以下。在以往,搭建屋顶是木工活中技术门槛最高、最耗时也最危险的环节,木匠必须悬空挂在一两层楼高的半空中,精确切割椽条(rafters)并以完美角度拼合;而预制桁架直接将这道高难度工序移到了工厂流水线上,现场施工人员只需将其固定并铺上 OSB 板即可。尽管预制桁架带来了严重副作用——“霸占了原本可用作储物的阁楼空间,遇火时燃烧垮塌更快,且后期几乎无法改建”,但市场成本机制依然促使其成为了廉价住宅的绝对主流标准。 --- ### [06:01](https://www.youtube.com/watch?v=VuliaG_-uao&t=361s) 沥青瓦与乙烯基壁板:牺牲长期耐久性的速成外壳 在建筑外立面与屋顶的封闭防护上,美式工艺同样将廉价与高效发挥到了极致。屋顶在铺设一层合成防水垫层(synthetic underlayment)之后,工人会直接铺设大块的沥青瓦(shingles)。沥青瓦的铺设极其简单快捷,工人只需对齐位置,手持气动射钉枪迅速击发固定。一名熟练工人一天就能铺设 700 到 800 平方英尺的沥青瓦,这意味着一个多人组成的专业屋顶施工队仅需一天时间就能完成整栋住宅的屋顶铺装。 相比之下,英国低成本屋顶的标配是混凝土瓦片(concrete tiles)。美国的三联沥青瓦每平方英尺造价约 1.5 美元,而英国的混凝土瓦单价在 2.25 美元左右;混凝土瓦铺设极其耗时繁琐,导致英国屋顶的总体综合造价约为美国的两倍。然而,代价体现在寿命上:“美式系统为了极低的前期初始成本,不惜牺牲长期的耐用性。”美国沥青瓦屋顶依据气候严酷程度,每 15 至 30 年就必须彻底更换一次;而英国混凝土瓦屋顶的使用寿命普遍长达 50 年,在房屋的全生命周期内,其年化成本与省心程度甚至更胜一筹。 外墙饰面同样遵循这一套路。廉价住宅最常用的外立面是乙烯基壁板(vinyl siding)。这种塑料外墙板基本采用卡扣式设计,工人只需简单拼接,再用锤子和钉子将其敲在墙面上,小施工队一天即可完工。乙烯基壁板存在严重的材料缺陷:天冷时易脆裂,在强反射阳光照射下会融化变形,历经风雨容易褪色老化,甚至发生雨水渗漏。然而,它凭借低廉的售价和极其迅速的安装效率,牢牢统治了美国廉价建房市场。 - **屋顶材料成本对比**:美式三联沥青瓦约 1.5 美元/平方英尺;英式混凝土瓦约 2.25 美元/平方英尺。 - **使用寿命周期**:美国沥青屋顶寿命仅 15-30 年;英国混凝土瓦屋顶可达 50 年。 - **外立面安装速度**:乙烯基壁板借助卡扣与敲钉工艺,小型团队一天即可搞定整栋住宅外墙。 --- ### [07:48](https://www.youtube.com/watch?v=VuliaG_-uao&t=468s) 空心墙的隐藏红利:管线铺设与中央空调的普及 当房屋的“皮肉”就位后,美式建造流程迎来了它最神奇的高效时刻:水暖电机械系统(MEP: mechanical, electrical, and plumbing)进场安装。得益于木龙骨之间大量贯通的空心间隙,电工和管道工可以毫不费力地在墙体内部穿引电线、水管以及庞大的 HVAC 暖通空调风道,完全不需要在实心砖石墙上费力开槽开洞。 正因这种墙体特性,美国房屋才能普遍将中央空调(AC)作为出厂标配,而在大洋彼岸的英国,空调至今仍被视作一种“巨大的奢侈品”。英国缺乏空调固然与其温带海洋性气候凉爽有关,但气候绝非全部原因。事实上,伦敦与西雅图的夏季平均最高气温几乎完全一致,但两地的空调普及率却天差地别:伦敦仅有约 5% 的家庭安装了空调,而西雅图的空调普及率超过 50%。美国住宅通常依靠木构架内的空心管道系统进行集中供暖,既然送风管道网络已经天然存在,屋主仅需以极低的额外成本挂接一台空调冷凝器即可享受制冷,即便一年中真正派上用场的日子屈指可数,这笔低廉的边际投资也被绝大多数美国家庭视作物超所值。 ### [08:45](https://www.youtube.com/watch?v=VuliaG_-uao&t=525s) 美英建房工序与施工速度的悬殊差距 在经历偶尔的夏季热浪时,大西洋两岸对室内温控的处理方式大相径庭。英国住宅通常依赖散热片暖气片供暖,这在很大程度上是因为将热水管道穿过砖墙相对容易;因此,在英国后装空调完全是一道额外且繁琐的工序,往往不得不给每个大房间外挂突兀又嘈杂的无管道独立分体式空调(ductless units)。相比之下,美式木结构房屋在各类管线铺设完毕后,施工便进入平滑的装配快车道:工人将预先裁切好、专门适配 16 英寸或 24 英寸龙骨标准间距的保温棉卷迅速塞满墙体;紧接着,内墙密封更是简单到极致,只需将石膏板(drywall)对齐并用螺丝直接固定在龙骨上即可。 在此之后,剩下的便是涂料、地板、橱柜和表面装饰等纯美学与软装环节。单就建筑结构本身而言,整栋房子此时已经大功告成。在美国,一套位于典型住宅开发区内的中低端住宅,通常开工后短短两个月内就能推进到这一阶段。然而在英国,两个月过去时,泥瓦工往往还在工地上慢条斯理地砌砖。不可否认,砖墙的寿命确实更长,混凝土瓦屋顶、散热片集中供暖系统以及英式住宅中的绝大部分部件也同样更为结实耐用。英国房屋整体结构更牢固、寿命更悠久、能效也更优秀,如果一位普通英国人真能买得起房,他们确实完全有资格为自家房屋的扎实做工感到自豪。 - **龙骨标准化间距**:保温棉直接采用适配 16 英寸或 24 英寸木龙骨间隙的预裁卷材,填充效率极高。 - **内墙封板工艺**:石膏板仅凭机械螺丝直接拧入木龙骨,几乎无需湿作业等待干燥。 - **工期对比**:美式住宅 2 个月即可实现主体结构封顶并完成管线与石膏板封装,而同等时间内英式住宅往往仍停留在砌砖砌墙阶段。 --- ### [09:56](https://www.youtube.com/watch?v=VuliaG_-uao&t=596s) 成本与质量的权衡:技能门槛与耐久度代价 建造速度的背后是沉重的经济账本。相对于居民收入水平而言,英国的住房负担明显比美国沉重得多:英国的平均房价大约相当于居民年平均收入的 6.5 倍,而美国这一比例约为 5 倍。美式住宅的建造模式将成本效益榨取到了极致。虽然相对较差的耐久性确实推高了房屋后期的长期维护成本,但绝大多数美式住宅完全能够胜任其日常居住功能,并不存在任何致命的结构性缺陷。 然而,这种高度高效、对人工技术门槛要求相对偏低的建造流程,也悄然埋下了做工粗糙的隐患。由于整套施工步骤的设计初衷就是尽量减少对高薪资、高技术工种的依赖,这意味着普通低技能工人也能上手搭建一栋美国房屋。这并不代表多数美式住房都是由劣质劳工胡乱拼凑出来的,但在缺乏严格的全国性建筑从业者资质认证体系的背景下,粗制滥造的概率确实远高于英国。总体而言,只要结合售价来考量,美式房屋在国际横向对比中并不落下风,它只是把优化重心全然压在了“压低前期建造成本”上,而非追求“降低长期的维护与能源开销”。 ```mermaid flowchart TD accTitle: 美式房屋建造逻辑与核心权衡流程图 accDescr: 展示美式房屋如何通过简化工艺压低门槛,并将效率倾斜至居住面积的过程 subgraph Efficiency ["极致压缩的前期施工"] A["标准化轻质木龙骨与干法施工"] --> B["降低技术门槛与人工成本"] B --> C["极致压缩前期建造造价与工期"] end subgraph Allocation ["效益倾斜抉择"] C --> D{"效率红利用于何处?"} D -->|"实际选择"| E["无限扩大单套面积 (人均约800平方英尺)"] D -.->"未被采纳"| F["建设紧凑型住宅以彻底平抑总房价"] end subgraph Consequences ["现实代价与产品定位"] E --> G["大众市场化奢华:重数量轻质量"] E --> H["后期维修频次与能耗账单攀升"] end ``` --- ### [11:03](https://www.youtube.com/watch?v=VuliaG_-uao&t=663s) 美国住宅系统的“原罪”:将效率兑现为面积而非可负担性 如果非要给美式住房建造体系扣上一顶“原罪”的帽子,那绝不在于它过度依赖木材或其他廉价建材,而在于美国根本没有利用好这项建造模式所带来的巨大红利。在人均居住面积上,美国人平均拥有约 800 平方英尺的空间,是英国人平均约 390 平方英尺的两倍以上。美国住宅体系的建造效率堪称奇迹,但整个体系却把这股省下来的庞大生产力全部挥霍在了“做大居住面积”上。 居住空间固然令人愉悦,但归根结底空间属于一种奢侈品,而能够遮风挡雨的居所本身才是基本生存刚需。即便美国的住房危机整体严重程度不及英国,但在人口流入的大热门地区以及在囊中羞涩的年轻群体眼中,这依旧是一场货真价实的危机。虽然建筑施工成本只是决定最终房价的众多复杂变量之一,但只要美国愿意把独栋住宅的户型建得更紧凑一些,本可以创造出更多普通人完全负担得起的刚需住房。现行的美国住房体系很大程度上迎合了中产阶级的扩张欲望,却漠视了最底层群体的燃眉之急。它或许在质感上显得较为轻飘脆弱,或许老化破损的速度比理想状态更快,但这种折损恰恰是美国人换取大空间时心甘情愿付出的筹码——这是一种“大众市场化的奢华”,是彻头彻尾的“以量取质”。无论好坏,这都展现了极其纯粹的“典型美式风格”(quintessentially American for better or worse)。 - **人均居住面积对比**:美国人均居住空间达 800 平方英尺(约 74.3 平方米),英国人均仅为 390 平方英尺(约 36.2 平方米),美国为英国的两倍有余。 - **可负担性缺口**:住房体系将建筑红利全面导向“豪宅化”尺度,导致年轻群体及热点城市的新增刚需被高昂的房屋总价挤出市场。 - **产品核心哲学**:宁要松散开阔的大空间,不要紧凑致密的高耐久,本构就是一场以牺牲长线寿命换取空间规模的商业权衡。 --- ### [12:17](https://www.youtube.com/watch?v=VuliaG_-uao&t=737s) 平台赞助与推荐:《Jet Lag》及 Nebula 独家内容 用“无论好坏的典型美式风格”来形容本季的竞技真人秀节目《Jet Lag: The Game: Stateside Scramble》同样再贴切不过。目前这一季已播出了数集,节目邀请了来自《Hi-Ho》与《Abolish Everything》的 Amy 加盟,与制作团队并肩横跨整个美国大陆展开对决。制作一整季《Jet Lag》背后需要庞大团队倾注极多心血,观众若想追平进度或提前抢先观看,可以直接前往创作者自主建立的流媒体平台 Nebula。 Nebula 是由创作者群体共同打造的内容平台,专为承载那些极具实验性、最能体现创作者构想的优质长视频而生。作为 Nebula 的原创独家栏目,《Jet Lag》全季全集均可在该平台上实现无广告畅看,并且每集都会比其他公共平台提前整整一周上线。除了这档节目外,Nebula 还汇集了团队旗下更高制作预算的纪录片项目、喜剧辩论节目,以及大量头部知识博主的拓界力作——例如 Mike Downie 打造的《Downie Express》刚刚更新了第三季穿越曼谷至巴厘岛的完结篇;《Not Just Bikes》的 Jason 也在其限定系列中深度拆解欧洲各类精妙的公共交通网络。对于那些不愿被严苛算法限制或不想迎合大众病毒式传播的内容创作者来说,Nebula 是最佳阵地。观众通过专属通道(nebula.tv/wendover)订阅年度会员可享半价优惠,折合年费仅需 30 美元(约合每月 2.50 美元)。 ## Notable quotes > [00:00](https://www.youtube.com/watch?v=VuliaG_-uao&t=0s) 现在的房子真不如过去结实了。 > [00:00](https://www.youtube.com/watch?v=VuliaG_-uao&t=0s) 永远都装在错误的位置 — 承包商 > [00:51](https://www.youtube.com/watch?v=VuliaG_-uao&t=51s) 甚至在入职第一天就能亲自动手参与盖房 > [03:56](https://www.youtube.com/watch?v=VuliaG_-uao&t=236s) 霸占了原本可用作储物的阁楼空间,遇火时燃烧垮塌更快,且后期几乎无法改建 > [06:01](https://www.youtube.com/watch?v=VuliaG_-uao&t=361s) 美式系统为了极低的前期初始成本,不惜牺牲长期的耐用性。 > [07:48](https://www.youtube.com/watch?v=VuliaG_-uao&t=468s) 巨大的奢侈品 > [11:03](https://www.youtube.com/watch?v=VuliaG_-uao&t=663s) 大众市场化的奢华 > [11:03](https://www.youtube.com/watch?v=VuliaG_-uao&t=663s) 以量取质 > [12:17](https://www.youtube.com/watch?v=VuliaG_-uao&t=737s) 无论好坏的典型美式风格 ## Mentioned Wendover Productions, Sam Denby, Nebula, Jet Lag: The Game: Stateside Scramble, Amy, Mike Downie, Downie Express, Not Just Bikes, Jason, 定向刨花板 (OSB), 乙烯基壁板 (Vinyl Siding), 暖通空调 (HVAC) ## Video description Get Nebula using my link for 50% off an annual subscription: https://go.nebula.tv/wendover Watch Day Pass: https://nebula.tv/daypass?ref=wendover Youtube: http://www.YouTube.com/WendoverProductions Instagram: http://Instagram.com/sam.from.wendover Twitter: http://www.Twitter.com/WendoverPro Sponsorship Enquiries: wendover@standard.tv Other emails: sam@wendover.productions Reddit: http://Reddit.com/r/WendoverProductions Writing by Sam Denby, Tristan Purdy, and Christine Benedetti Editing by Alexander Williard Animation by Sara Stoltman, Gabriel Ferreras, Austin Glass, and Kate Ermolenkko Sound by Manni Simon and Dony Bullen Thumbnail by Simon Buckmaster [Source](https://www.youtube.com/watch?v=VuliaG_-uao)

Source quotes

[0:00] 现在的房子真不如过去结实了。 [0:00] 承包商: 永远都装在错误的位置 [0:51] 甚至在入职第一天就能亲自动手参与盖房 [3:56] 霸占了原本可用作储物的阁楼空间,遇火时燃烧垮塌更快,且后期几乎无法改建 [6:01] 美式系统为了极低的前期初始成本,不惜牺牲长期的耐用性。 [7:48] 巨大的奢侈品 [11:03] 大众市场化的奢华 [11:03] 以量取质 [12:17] 无论好坏的典型美式风格

Source quotes

Sam Denby: The American preference for the new unfortunately means it is unlikely that many US houses or other buildings will still be around say 500 years from now. Sam Denby: The American mindset of bulldozing the old and building something new instead every few decades keeps us from having a sense of history. Sam Denby: All great civilizations have left structures for us to admire—Rome, Egypt, Greece, Byzantium, Incas, Aztecs. Sam Denby: Unfortunately, it doesn't seem likely that American civilization will leave any impressive physical structures behind for posterity. Sam Denby: Skyscrapers are often leveled after a few decades to make way for new ones. Sam Denby: This is also a part of being a consumer society that throws away the old to make way for the supposed goodness of the new. Sam Denby: The fact remains that the building quality has not gone up since the 1950s. Sam Denby: Americans have come to expect that their houses look in a certain style.

Original transcript

[0:00] They really just don't build them like [0:02] they used to. The vast majority of new [0:04] housing in the US is single family homes [0:06] and the vast majority of those start in [0:08] the same cheap compromised way, an [0:11] atgrade slab foundation. These are fine. [0:14] They do the job and they're easy, but [0:16] they could be better. The main issue is [0:18] that concrete is poured on and around [0:19] all the utility line. So, if they're in [0:21] the wrong spot and contractors complain [0:23] that they're always in the wrong spot, [0:25] complicated fixes will become necessary [0:26] down the line, potentially including [0:28] tearing up the foundation. If a [0:30] homeowner wants to renovate, it's even [0:31] worse. Moving utility lines becomes a [0:34] huge headache. There is a better [0:36] alternative, the crawl space foundation, [0:37] leaving room for utilities and [0:39] mechanical elements with the added perk [0:40] of a layer to keep moisture and termites [0:42] away from the home. But these are more [0:43] costly to build. So, 73% of the time, [0:46] American homes start with that atgrade [0:48] slab foundation. Next, builders move on [0:51] to constructing the structural skeleton [0:53] of the home. And this is where the US is [0:55] really unique. It builds with wood. The [0:58] US isn't entirely alone in this. Canada, [1:01] Australia, Japan, and Scotland, too, [1:03] primarily use the material, but on a [1:05] global scale, timber framed homes are [1:07] fairly rare. By and large, wealthier [1:10] countries tend to build with brick and [1:11] concrete while perceiving wood as cheap. [1:14] And they're right. Wood is cheap, [1:16] especially in the US. A standard 8ft 2x4 [1:20] currently costs just $4, and unlike [1:22] other building materials, you don't need [1:24] that many of them to build a house. [1:25] Carpenters construct each section of [1:27] wall on the ground, spacing planks [1:29] either 16 or 24 in apart. The spacing is [1:32] industry standard in the US, allowing [1:34] for compatibility with other building [1:35] materials down the line. Occasional [1:37] horizontal support is placed, and [1:39] additional wood is used to reinforce the [1:40] openings for windows and doors. But [1:42] unlike the concrete or brick, there is a [1:44] whole lot of dead space left in these [1:45] walls. This drives down material cost, [1:48] but equally importantly, the process of [1:50] framing drives down labor costs. It's [1:53] just so much quicker than say brick [1:56] laying. That's the predominant style of [1:57] home construction in England, for [1:59] example, and it leads to a stark [2:01] difference in construction cost. In the [2:03] US, there's no certification or formal [2:06] experience needed to work as a framer. [2:08] People will quite literally play a hand [2:09] in building a house on their first day [2:11] on the job. While of course there are [2:13] hierarchies within crews and more [2:14] experienced individuals are assigned to [2:16] more skill- dependent tasks. American [2:18] framers learn by doing. In England, the [2:21] equivalent job is done by brick layers [2:23] who, as with most trades in the country, [2:25] practically must go through a 2-year [2:27] structured apprenticeship combining [2:29] classroom instruction with on-site [2:30] experience to gain a full-time job. This [2:32] means that brick laying tends to be a [2:34] lifelong career in England. While [2:36] American framing crews are typically led [2:37] by career carpenters, much of each crew [2:40] is often made up of relatively [2:41] entry-level laborers, since many of the [2:43] tasks in framing can be done by those [2:45] without a tremendous amount of [2:47] experience. Wages actually tend to [2:49] average about the same between English [2:50] brick layers and American framers, about [2:52] $28 an hour. But that means labor is [2:54] effectively more expensive in the UK [2:56] since average income is about a quarter [2:58] lower. Brick laying also takes much more [3:01] labor. While it depends how large the [3:04] crew is, framing an American house is [3:05] often done in just 1 to two weeks, [3:07] whereas the equivalent brick laying [3:09] process in England lasts 1 to two [3:11] months. Add on the higher material [3:13] costs, and the American home framing [3:15] process is much, much cheaper than the [3:18] English equivalent. England actually [3:20] used to build most of its homes with [3:21] wood, but towards the end of the Middle [3:23] Ages, it just ran out of it. Region by [3:26] region, between about 1,200 and600, [3:29] builders were pushed towards brick as it [3:30] became more and more difficult to find [3:32] high quality timber. Today, the UK has [3:35] some farmed forestry land, particularly [3:37] in Scotland, but the vast majority of [3:39] its wood comes from Scandinavia, driving [3:41] up costs. The same 2x4 that sells for an [3:43] average of $4 in the US, goes for about [3:46] $6 in the UK. Once you add that 50% cost [3:49] increase to the entire frame, the cost [3:51] competitiveness of wood versus brick is [3:53] far weaker in the UK. But similar [3:56] environmental factors have influenced [3:57] the US home building process as well. In [4:00] the next step of the process, the frame [4:02] needs to be turned into solid walls, but [4:04] builders don't use solid wood for this. [4:06] Similar to the UK, the US logged [4:08] primarily natural forests for much of [4:10] its 250 years of expansion. But by the [4:12] 1950s, the economics shifted. The easy [4:15] to access old growth trees were mostly [4:17] gone. So the logging industry shifted to [4:19] managed farmed forests. Trees are now [4:22] predominantly planted on privately owned [4:24] land and cut down 30 or so years later. [4:26] But these farmed trees are much smaller [4:29] than those of yester year. They're still [4:31] thick enough that the center can be cut [4:32] into long straight 2x4s. But much of the [4:35] outer portion of the log is sliced into [4:37] thin cuts of wood that are then mixed [4:38] with a resin glue and pressed into flat [4:41] boards, what are known as OSB boards. [4:44] Now, not only are these far cheaper than [4:46] solid wood since they use the less [4:47] valuable parts of the tree, but they're [4:49] also better suited for construction [4:50] since they have less potential for weak [4:52] points. They have consistent strength [4:54] throughout. While these boards might not [4:55] be the most aesthetic, they'll never be [4:57] seen once the house is done. So, they're [4:59] the best suited option for the exterior [5:00] sheathing. More engineered wood is used [5:03] in the next step in the process as well [5:04] as carpenters start on the second story. [5:07] The structural part of floors is [5:08] typically built with eye jojists, which [5:10] are pre-fabricated, standardized, widely [5:12] available products selling for $40 to [5:14] $60 that can each hold thousands of [5:16] pounds of weight. It's the same story [5:18] with the roof, which these days is often [5:20] built using pre-fabricated factory-built [5:22] trusses. Also quite cheap, often under [5:25] $100 depending on width. Building the [5:27] roof used to be one of the most [5:28] time-conuming and skill- dependent parts [5:30] of framing a house. Rafters would have [5:32] to be precisely cut to meet at a [5:34] consistent angle, all while carpenters [5:36] dangled one or two stories above the [5:38] ground. Roof trusses do that complicated [5:40] part on a mass manufacturing line at a [5:42] factory, making framing the roof as [5:43] simple as fastening down each truss and [5:45] affixing some OSB boards on top. There [5:47] are some downsides. They use up space [5:49] that would otherwise act as usable [5:50] attic. They burn faster in a fire. [5:52] They're almost impossible to modify. But [5:54] the upsides have won out in the [5:56] marketplace, and they're now fairly [5:57] standard in lowercost homes. Similar [6:00] compromises have been made on the [6:01] industry standard method to seal the [6:03] roof as well. After a protective [6:05] synthetic underllayment is laid out, [6:06] which some would argue is worse than the [6:08] traditional felt equivalent, American [6:10] roofers typically install large sheets [6:11] of shingles. These can be installed [6:14] remarkably fast by just positioning them [6:16] in place and firing off a nail gun. A [6:18] single experienced individual can often [6:20] install 7 or 800 ft of shingles in a [6:23] day, meaning a roofing crew comprised of [6:25] multiple workers often completes the [6:27] whole job in a day. Once again, [6:29] comparing that to England, while these [6:31] sheets of shingles are an option there, [6:33] the default material of choice for [6:34] lowcost roofing is concrete tiles. These [6:37] are also mass- manufactured, but while [6:39] the American threetap shingles cost [6:40] about a dollar and a half per square [6:42] foot, these go for more like 2 and a [6:44] quarter. They're also far more [6:45] timeconuming to install, meaning allin [6:48] an English roof costs about double that [6:50] of an American one. The trade-off, of [6:52] course, is durability. An American roof [6:55] must be replaced about once every 15 to [6:57] 30 years, depending on the harshness of [6:59] the local climate. In England, that [7:01] process typically doesn't happen for 50 [7:03] years, meaning in the lifespan of a [7:05] home, it ends up similarly priced and [7:07] more convenient. The American system [7:09] optimizes for low upfront cost at the [7:12] expense of long-term durability. Next, [7:14] workers install the aesthetic exterior [7:16] of the house, typically vinyl sighting, [7:18] for lowcost builds. This style of siding [7:21] is incredibly easy to install. For the [7:23] most part, it just snaps in place. Then [7:25] all that's needed is a hammer and nails [7:26] to affix it to the wall. Like the roof, [7:29] an average installation can be done by a [7:31] small crew in just a day. Vinyl sighting [7:34] comes with some real compromises. It can [7:36] crack in the cold, melt in magnified [7:38] sunlight, fade in color through time, [7:40] leak water. It's not a great material, [7:42] but it's super cheap to buy and install, [7:44] so it's the option of choice for cheap [7:46] builds in the US. But perhaps the [7:48] greatest efficiency magic of the US [7:50] homebuilding process happens next as [7:52] electricians and plumbers come in and [7:54] install its mechanical backbone. With [7:56] all the open space between the studs in [7:58] each wall, the process of installing the [7:59] wires, pipes, and ducts for electrical, [8:02] plumbing, and HVAC systems is incredibly [8:04] simple. It's in part for this reason, in [8:06] fact, that American houses come standard [8:08] issue with what's considered a massive [8:10] luxury in the UK, air conditioning. Now, [8:13] of course, much of the reason the UK [8:15] lacks air conditioning is that its [8:16] climate rarely calls for it, but that's [8:18] far from the whole story. London and [8:20] Seattle's summer highs are near [8:22] identical, yet their AC adoption is not. [8:25] In London, just about 5% of homes have [8:27] it, whereas in Seattle, that portion is [8:30] over 50%. American homes default to [8:33] ducts for heating, in part because [8:34] they're fairly simple to install through [8:36] the open timber frames. With ducks [8:38] already there, adding an AC condenser to [8:40] the system is a rather trivial [8:42] additional expense that many consider [8:43] justified, even if it only be put to use [8:45] during the occasional summer heatwave. [8:47] English homes tend to heat using [8:49] radiators, in part due to the easier [8:51] installation of the necessary pipes [8:52] through brick walls. So, installing AC [8:54] is a whole separate process, typically [8:56] requiring the installation of unsightly [8:58] and noisy duckless units in each large [9:01] room. Once all the mechanicals are in, [9:03] insulation goes next, which is also a [9:05] fairly straightforward process thanks to [9:07] pre-cut rolls sized for the standard 16 [9:09] or 24in spacing between studs. Finally, [9:12] interior walls are sealed by installing [9:14] drywall, an incredibly straightforward [9:16] process entailing just simply screwing [9:18] it into the stud. Then, of course, there [9:20] are all the aesthetic elements, paint, [9:22] floors, cabinets, finishes, and more. [9:24] But by this point, the house is [9:26] structurally done. A typical lower-end [9:28] home in the US, particularly in a [9:30] development, will get to this point [9:31] within 2 months. Meanwhile, in England, [9:35] 2 months in, it's not uncommon for brick [9:37] laying to still be going on. Bricks do [9:40] last longer, though. So do concrete tile [9:42] roofs, radiator heating, and just about [9:44] every element of the average English [9:46] home. They're built stronger, they last [9:48] longer, they're more efficient. The [9:50] average Englishman has every reason to [9:52] be pompous about the build quality of [9:54] their home if they can afford one. [9:56] Relative to income, housing is [9:58] meaningfully more expensive in the UK [10:00] than the US. Their average house costs [10:03] about 6.5 times average annual income, [10:05] whereas it's about five times more in [10:07] the US. The American style of home [10:09] building is extremely costefficient. And [10:12] while a relative lack of durability does [10:14] drive up long-term maintenance costs, [10:16] the vast majority of American homes are [10:18] perfectly suited for their purpose and [10:19] don't have any existential issues in [10:21] their construction. But what the highly [10:24] efficient, comparatively lower skill [10:26] process of American homebuilding allows [10:27] for, however, is the potential of [10:29] sloppier construction. Considering the [10:31] steps in the process are designed to [10:33] rely less on costlier or highly skilled [10:35] labor, lowerkilled labor can build an [10:38] American home. That doesn't mean that [10:40] most American homes are built by lower [10:42] skilled labor. But with a lack of a [10:43] strong nationwide system of [10:45] certification of builders, there is the [10:47] potential for sloppy construction in a [10:49] way that there's less of in the UK. By [10:51] and large though, American homes are not [10:54] necessarily worse than their [10:55] international equivalents when you [10:56] consider their price. They just optimize [10:58] for low upfront construction costs [11:00] rather than low long-term maintenance [11:02] and energy costs. If one were to pick [11:04] the cardinal sin of the American home [11:06] building system, it's not that it relies [11:08] on timber or other cheaper building [11:09] materials, but it's that the US doesn't [11:11] take advantage of its advantage. Each [11:14] American has on average more than double [11:16] the living space of the average Brit, [11:18] about 800 square ft versus just 390. The [11:22] way America builds homes is [11:24] extraordinarily efficient. But then it [11:26] pours those efficiencies into size. [11:29] While space is nice, it's a luxury, [11:31] while housing is a necessity. And even [11:34] if the US's housing crisis is not as bad [11:36] as the UK's, it's still a crisis, [11:39] particularly in the most in demand [11:40] regions and for young people. While [11:42] construction cost is only one of a [11:44] multitude of factors influencing housing [11:46] cost, the US could have more affordable [11:48] housing and particularly more affordable [11:50] single family homes if it just built [11:53] smaller. American housing ignores the [11:55] needs of those in greatest need while [11:57] serving the middle class most. It may be [12:00] comparatively flimsy. It may break down [12:02] sooner than it needs to, but that [12:04] downside is a trade-off for an upside [12:06] many Americans value. It's mass market [12:09] luxury. It's quantity over quality. It's [12:12] quintessentially American for better or [12:15] worse. [12:17] Quintessentially American for better or [12:19] worse would also be an excellent [12:20] description of this season of Jetlag the [12:21] game stateside scramble. The season's [12:23] already a good few episodes in and it's [12:25] a really fun one because we brought Amy [12:27] of Hi and Abolish everything fame into [12:29] compete alongside me all the way across [12:31] the US. We're really proud of this [12:33] season and honestly we're really proud [12:34] of every season because jetlag just [12:36] takes a lot of effort from a big team to [12:38] make happen. If you'd like to catch up [12:40] or if you'd like to get ahead, I'd [12:41] recommend giving it a watch on its home [12:43] platform, Nebula, a streaming service [12:45] built out by us creators to allow us to [12:47] showcase some of our best, most creative [12:48] work and provide you all with more of [12:50] the content that brings you to this [12:52] channel and all of our channels to begin [12:54] with. Because Jetlag is a Nebula [12:55] original, the entire library, every [12:57] episode of every season lives on the [12:59] platform for you to fly through without [13:01] any ads. And because it's a Nebula [13:03] original, if you want to get a week [13:04] ahead on the episodes, you can do so on [13:06] Nebula. And access to jet lag is really [13:08] just only the tip of the content [13:10] iceberg. It's where our team's bigger [13:11] budget documentary projects live. It's [13:13] where our comedy debate show lives. And [13:15] it's also where a whole host of your [13:16] favorite creators are posting some of [13:18] their most innovative stuff. If travel [13:20] is your thing, Mike Downey series Downey [13:22] Express just recently posted its finale [13:24] episode of season 3 going Bangkok to [13:26] Bali. If transport is your thing, get on [13:28] board with Jason from Not Just Bikes [13:29] with his limited series exploring some [13:30] of the most interesting European transit [13:32] systems one by one. If you're looking [13:34] for really anything from your favorite [13:35] creators that pushes their creative [13:37] boundaries or perhaps is just too close [13:38] to potentially butdding up against [13:40] restrictive content guidelines or just [13:41] not optimized for all important [13:43] virality, Nebula is the place to find [13:45] it. It's a platform we've all worked [13:47] really hard to build out. It's one that [13:48] just keeps getting better and deeper as [13:50] we all keep adding content. And if you [13:51] want to give it a try, it's pretty darn [13:53] cheap. Follow my link nebula.tv/wendover [13:56] and you'll get 50% off an annual [13:58] subscription. That makes it only $30 for [14:00] a year or $ 250 a month. If you want to [14:02] give it a shot, we couldn't be more [14:04] appreciative. So, thanks.