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Construction Covers

Short answer: In crowded Chinese cities, some building and excavation sites are now covered by huge air-supported domes, sometimes called 'soft pillows' or 'giant airbags'.

Fans on the ground keep pumping air in, so the slightly higher pressure inside holds up a membrane, often PVDF-coated fabric, usually reinforced with steel cables. The main goal is to keep dust and noise from reaching the neighbors. Local officials say a nearly 9,000 m² dome over a renovation site in Guangzhou's Yuexiu District blocks up to 99% of dust. CGTN reported that it keeps construction noise below 60 decibels. A dome in Shenzhen stands 40 m tall over more than 12,000 m². Officials say such domes can be reused and taken down without leaving construction waste. A related design is used on contaminated land. In 2016, a soil-cleanup project at Beijing's former Shougang steelworks built what researchers called China's first negative-pressure membrane yard. There the air pressure is kept slightly lower inside, so fumes and dust can't leak out, and exhaust is filtered before release. The footage shows a white dome between towers and a Gothic-style church, but the Reel doesn't name the site.

VideoWrite-up3 sources

In collections:Engineering Oddities

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What should you know about Construction Covers?

Quick facts. Each one stands alone and has a stable ID you can cite.

  1. Fans keep air-supported construction domes inflated.

    DD-631-F01 · Write-up · Exhibit A (Held up by air)

  2. A Guangzhou dome is reported to block up to 99% of dust.

    DD-631-F02 · Write-up · Exhibit B (For the neighbors)

Video transcript: Construction Covers: A Building Site Under a Bubble

DID YOU KNOW? Chinese inflatable construction site covers are large, air-supported structures used to protect construction projects from weather and dust, while providing a controlled environment for workers. Made from durable weather resistant materials, these inflatable covers can be quickly deployed and moved, offering flexibility and cost savings compared to traditional scaffolding or hard enclosures. NOW YOU KNOW!

Burned-in captions, read frame by frame (see transcript.md) · 20.7s Reel ·

Video coming soonConstruction Covers · Instagram Reel
Construction Covers: A Building Site Under a Bubble Instagram Reel · · 20.7s

The write-up

A building site under a bubble. Air-supported domes keep dust and noise in.

  1. Exhibit A

    Held up by air

    Ground fans keep the inside pressure slightly higher than outside, which holds up a PVDF membrane over the site.

  2. Exhibit B

    For the neighbors

    A Guangzhou dome is reported to block up to 99% of dust, and CGTN says it keeps noise below 60 decibels.

  3. Exhibit C

    Big ones

    A Shenzhen dome stands 40 m tall and covers more than 12,000 m².

  4. Exhibit D

    Reusable

    Officials describe the domes as reusable and easy to take down, with no construction waste.

  5. Exhibit E

    Negative pressure

    For contaminated soil, a 2016 Beijing yard kept the air pressure lower inside so fumes couldn't escape.

Questions people ask about Construction Covers

What holds up an air-supported construction dome?

Fans keep the inside pressure slightly higher.

Source: Write-up · Exhibit A (Held up by air) · Shenzhen Government Online: Giant 'soft pillows' reshape construction in Guangzhou and Shenzhen; CGTN (Mar 13, 2026): 9,000 m² 'giant airbag' installed at construction site in S. China

What is the main reason for these domes in Chinese cities?

They contain dust and noise.

Source: Write-up · Exhibit B (For the neighbors) · Shenzhen Government Online: Giant 'soft pillows' reshape construction in Guangzhou and Shenzhen; CGTN (Mar 13, 2026): 9,000 m² 'giant airbag' installed at construction site in S. China

How much dust is a Guangzhou dome reported to block?

Up to 99%, according to local officials.

Source: Write-up · Exhibit B (For the neighbors) · Shenzhen Government Online: Giant 'soft pillows' reshape construction in Guangzhou and Shenzhen; CGTN (Mar 13, 2026): 9,000 m² 'giant airbag' installed at construction site in S. China

How tall is the Shenzhen dome?

40 m tall, over more than 12,000 m².

Source: Write-up · Exhibit C (Big ones) · Shenzhen Government Online: Giant 'soft pillows' reshape construction in Guangzhou and Shenzhen

Why keep a contaminated-soil dome at lower pressure inside?

Air flows in, not out.

Source: Write-up · Exhibit E (Negative pressure) · Application of technology of negative pressure membrane structure for soil remediation (2018), Advances in Environmental Protection

Test Your Knowledge

All quizzes →

5 questions, all from this case file. Answers are revealed instantly.

  1. What holds up an air-supported construction dome?

    1. Air pressure from fans
    2. Steel columns inside
    3. Helium
    4. Wooden arches
    Show the answer

    Answer: A. Air pressure from fans Fans keep the inside pressure slightly higher. Source: Write-up · Exhibit A (Held up by air) · Shenzhen Government Online: Giant 'soft pillows' reshape construction in Guangzhou and Shenzhen; CGTN (Mar 13, 2026): 9,000 m² 'giant airbag' installed at construction site in S. China

  2. What is the main reason for these domes in Chinese cities?

    1. Keeping dust and noise from neighbors
    2. Hiding the design
    3. Growing plants
    4. Storing water
    Show the answer

    Answer: A. Keeping dust and noise from neighbors They contain dust and noise. Source: Write-up · Exhibit B (For the neighbors) · Shenzhen Government Online: Giant 'soft pillows' reshape construction in Guangzhou and Shenzhen; CGTN (Mar 13, 2026): 9,000 m² 'giant airbag' installed at construction site in S. China

  3. How much dust is a Guangzhou dome reported to block?

    1. Up to 99%
    2. About 10%
    3. About 50%
    4. None
    Show the answer

    Answer: A. Up to 99% Up to 99%, according to local officials. Source: Write-up · Exhibit B (For the neighbors) · Shenzhen Government Online: Giant 'soft pillows' reshape construction in Guangzhou and Shenzhen; CGTN (Mar 13, 2026): 9,000 m² 'giant airbag' installed at construction site in S. China

  4. How tall is the Shenzhen dome?

    1. 40 m
    2. 4 m
    3. 400 m
    4. 1 m
    Show the answer

    Answer: A. 40 m 40 m tall, over more than 12,000 m². Source: Write-up · Exhibit C (Big ones) · Shenzhen Government Online: Giant 'soft pillows' reshape construction in Guangzhou and Shenzhen

  5. Why keep a contaminated-soil dome at lower pressure inside?

    1. So fumes can't leak out
    2. To make it float
    3. To keep it warm
    4. To stop rain
    Show the answer

    Answer: A. So fumes can't leak out Air flows in, not out. Source: Write-up · Exhibit E (Negative pressure) · Application of technology of negative pressure membrane structure for soil remediation (2018), Advances in Environmental Protection

Cite this case file

Easterling, Marcus. "Construction Covers." The Detail Department (DetailEnjoyer), case file DD-631, last updated Aug 4, 2025. https://detailenjoyer.com/case/construction-covers/

Permalink: https://detailenjoyer.com/case/construction-covers/ · Last updated

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