Is ACM Cladding Banned?

ACM cladding has caused global concern due to its role in deadly fires like the Grenfell Tower tragedy. Many wonder whether it’s banned or still in use.

ACM cladding with a polyethylene (PE) core is banned in several countries and heavily restricted in the U.S. due to its fire risk.

Despite bans in places like the UK, PE-core ACM is still legally installed in some areas, especially where regulations are outdated or not enforced. That’s why understanding its safety and legal status is critical.

Is ACM Cladding Banned in the US?

ACM cladding sparked major debate in the US after the Grenfell disaster. Builders and designers started questioning the safety of these panels.

ACM cladding is not completely banned in the U.S., but PE-core types are restricted on high-rise buildings.

Key Points:

• The U.S. follows the International Building Code (IBC).
• ACM with flammable cores like polyethylene must pass fire tests, such as NFPA 285.
• Fire-safe versions with mineral cores are still allowed.
• Some states have relaxed regulations or use outdated codes.

In short, if you’re working on a high-rise or public building, using PE-core ACM panels is usually a non-starter. But the patchwork of rules across U.S. states means the material hasn’t been universally outlawed.

Is ACM Cladding Safe?

After seeing how fast fire spread at Grenfell, it’s natural to ask if ACM cladding is ever safe.

ACM cladding is only safe if it uses fire-resistant or non-combustible core materials. PE-core panels are considered highly dangerous.

Types of ACM Cladding:

Not all ACM panels are equal. The core material determines how they behave during fire. Safe cladding exists—but only when it’s designed and tested properly.

What Is the Problem with Composite Cladding?

Composite cladding includes a variety of materials fused together, often used for aesthetics and ease of installation. But looks can be deceiving.

The biggest issue with composite cladding is fire risk, especially when it uses combustible cores like PE.

Core Problems with Composite Cladding

1. Combustibility

Polyethylene, a plastic-based core, melts and ignites easily. Once lit, it fuels fire like gasoline.

2. Toxic Smoke

Burning PE produces dense, toxic smoke that can choke escape routes and harm occupants.

3. Fire Spread

The cladding panels are often mounted with an air gap that can act like a chimney, pulling fire upwards rapidly across a building’s facade.

4. Lack of Clarity

Not all products are clearly labeled. Some building owners or contractors might not even know they’ve used dangerous materials.

To make safe choices, buyers must ask:

• What’s in the core?
• Has it passed fire safety tests?
• Was it installed by certified professionals?

What Are the Problems with Aluminium Cladding?

Aluminium is non-combustible on its own, but when used as cladding, it often hides a composite interior.

The main problem with aluminium cladding lies in the hidden materials inside, especially if the core is combustible.

What Can Go Wrong?

1. Misleading Safety

Many assume "aluminium" means it’s fireproof. But if the core is PE, that safety assumption is false.

2. Installation Gaps

Improper installation can leave air cavities that act like chimneys in a fire, spreading flames quickly.

3. Regulatory Confusion

Even now, some suppliers sell aluminium panels that haven’t been tested under newer fire codes.

If you’re choosing aluminium cladding, don’t just look at the outer layer. Ask what’s inside—and how it’s going to be installed.

Conclusion

ACM and composite cladding are not banned everywhere, but their safety depends on the core material. PE-core panels are highly dangerous, and fire safety rules around them vary. Always check the core type and fire certification.