Adding insulation or boarding over the access panel can and in ways that could potentially compromise fire safety. Fire rated access panels, whether installed in walls or ceilings, are rigorously tested to achieve specific fire resistance ratings.  

Once you start modifying the setup by boarding over them or adding insulation, you're changing the conditions under which they were tested.  

That neat bit of insulation might seem harmless, but it could seriously impact the panel’s performance during a fire. 

 

What’s the Purpose of a Fire Rated Access Panel? 

Fire rated access panels also known as fire resistant or fireproof access panels are specifically designed to compartmentalise fire. They slow the spread of flames and smoke, giving people more time to evacuate and emergency services more time to respond. 

These panels are often: 

1 hour or 2-hour fire rated, depending on building regulations 

Installed in fire-rated walls or ceilings 

Used to access electrical, data, or HVAC systems while maintaining fire integrity 
 

So, you can imagine why tampering with their setup isn’t exactly ideal. 

How Boarding or Insulating Might Backfire (Pun Intended) 

There are a few ways that boarding over or adding insulation to a fire rated inspection panel can mess with its fire integrity rating: 

Disrupting Heat Dissipation: Fireproof panels are designed to manage heat in specific ways. Extra materials may trap heat or conduct it differently. 

Altering Expansion Mechanisms: Many panels have intumescent seals that expand in heat. Blocking these with insulation can stop them working as intended. 

Changing Surface Combustibility: Not all insulation or boarding materials are non-combustible. That ‘quick fix’ could be a fire hazard. 

What the Regulations Say 

Fire safety regulations in the UK are clear: any changes to fire-stopping elements must not compromise their effectiveness. That includes the BS EN 1634-1 standard for fire resistance of doors and shutter assemblies. Any modification, even well-intended, can render a certified installation non-compliant. 

If you’re unsure whether a modification is allowed, check with the panel’s manufacturer or better yet, don’t touch it. 

 

 

Final Thoughts 

Before you start adding insulation or boards over that fire rated access panel, ask yourself: is saving a bit of energy worth compromising fire safety?  

Access panels are part of a finely tuned safety system treat them accordingly. Because when it comes to fire integrity, “close enough” really isn’t good enough. 

And remember, just because it fits, doesn’t mean it’s fire rated.