Bamboo scaffolds: Why Hong Kong still relies on them despite fire risks

Nevin Al Sukari - Sana'a - Flames engulf bamboo scaffolding across multiple buildings at Wang Fuk Court housing estate, in Tai Po, Hong Kong, China, November 26, 2025. — Reuters pic

HONG KONG, Nov 27 — At least 44 people have died and more than 270 are missing after a major fire engulfed an apartment complex in Hong Kong’s Tai Po district. The fire, which swept through multiple high-rise towers, is still burning.

The exact cause of the blaze, which broke out just before 3pm local time on Wednesday, is still unknown. Hong Kong Police have arrested three construction company executives on suspicion of manslaughter.

The apartment blocks are 31 stories tall. Opened in 1983, they were undergoing renovations at the time of the blaze, and were covered in bamboo scaffolding and green protective mesh.

Bamboo scaffolding has been a feature of the city for centuries. But why? The answer is part history, part engineering and part economics.

But the recent tragedy has sharpened the focus on fire safety, and when and where bamboo should be used.

A fast-growing grass

Bamboo is a fast-growing grass with hollow, tube-like stems (known as “culms”). Those tubes give it a high strength-to-weight ratio. A pole is light enough to carry up a stairwell, yet strong enough, when braced and tied correctly, to support platforms and workers.

Crews lash poles together in tight grids and tie them back to the buildings with brackets and anchors. Properly designed, a bamboo scaffold can resist wind and working loads.

Hong Kong’s Buildings Department and Labour Department publishes clear guidelines on the design and construction of bamboo scaffolds.

Bamboo scaffolding is also used in parts of mainland China, India, and across Southeast Asia and South America.

A cheap and flexible material

There are three main reasons why bamboo scaffolds are used in Hong Kong.

First, speed. An experienced team can “wrap” a building quickly because poles are light and can be cut to fit irregular shapes. That matters in tight streets with limited crane access.

Second, cost. Bamboo is a fraction of the price of metal systems, so contractors can keep bids low. The material is also easy to source locally, which keeps routine repairs and repainting within budget.

Third, tradition and skills. Bamboo scaffolding features in a famous piece of Chinese art, Along the River During the Qingming Festival, painted by Zhang Zeduan who lived between 1085 and 1145. Hong Kong still trains and certifies bamboo scaffolders, and the craft remains part of the city’s construction culture.

These factors explain why bamboo has remained visible on the city’s skyline even as metal systems dominate elsewhere.

Unlike metal made in blast furnaces, bamboo also grows back, and turning a stalk into a pole takes little processing. This means its overall climate impact is smaller.

What are the risks?

There are two main risks of bamboo scaffolding.

The first, as this tragedy in Hong Kong highlights, is fire.

Dry bamboo is combustible, and the green plastic mesh often draped over scaffolds can also quickly burn.

In the Tai Po fire, footage and reports indicate the fire quickly raced up the scaffolding and mesh, and across the facade of the buildings.

This is why there are calls for non-combustible temporary works on occupied towers — or at minimum, flame-retardant nets, treated bamboo, and breaks in the scaffold so fire can’t easily jump from bay to bay.

The second risk of using bamboo scaffolding is related to variability and weather.

Bamboo is a natural material, so strength varies with species, age and moisture. Lashings can loosen and storms are a common risk.

Hong Kong’s updated guidelines and code try to manage this with material rules (such as age, diameter and drying), mandatory ties to the structure, steel brackets and anchor testing, and frequent inspections — especially before bad weather.

A shift to metal

In March 2025, Hong Kong’s Development Bureau directed that metal scaffolds be adopted in at least 50 per cent of new government public-works building contracts. It also encouraged metal use in maintenance where feasible.

Subsequent government replies to the Legislative Council in June and July reiterated the 50 per cent requirement and described a progressive transition based on project feasibility.

Private projects may still use bamboo under existing codes. But for public works the baseline is now metal, signalling a move toward non-combustible systems.

The lesson from Hong Kong is not that bamboo is “good” or “bad” for scaffolding — it’s about context. It has clear advantages for small-scale, short-duration, ground-anchored work where streets are tight and budgets are lean. But on tall, occupied residential blocks, especially with mesh-wrapped facades, its fire risk and variability demand much stronger controls.

Bamboo scaffolding helped build Hong Kong’s skyline because it was fast, clever and affordable. The science behind fire and the realities of high-rise living now demand a tighter line: use the right tool for the job, and when the risks climb, switch to non-combustible systems.

That way the city can honour a proud craft, while keeping people safe in the homes those scaffolds surround. — Reuters