Fire proofing cable penetrations.

[Russell griffiths]

Morning. 
attatched garage 

I have 4 x25mm holes between the house and the attached garage, each hole has a 25mm conduit in it with a couple of cables in each. 
what are the regs for any fire prevention measures between the garage and the house, around the area of these cables. 

any thoughts. 
cheers. 

[Dunc]

Dunno if this applies for you: Scottish building standards technical handbook section 2.1.14 allows penetrations of up to 40mm diameter without remedial measures.

[Oz07]

I'd just fill them with intumescent mastic. 

[Russell griffiths]

2 hours ago, Dunc said:

Dunno if this applies for you: Scottish building standards technical handbook section 2.1.14 allows penetrations of up to 40mm diameter without remedial measures.

That would be handy. 

[saveasteading]

6 hours ago, Russell griffiths said:

4 x25mm holes 

Is this going to be inspected?

If not then don't worry.

Fire does not rage through such a hole unless there is a serious source of flame and fuel. 

 

If it is,  then wait for the bco to point it out. It's unlikely they will.

 

If anybody, including yourself, wants to seal it then intumescent mastic will do it.

But so will simply filing gaps with sand and cement.

 

For a serious solution in a dangerous situation you an get collars that will completely seal the hole, including in a collapsing duct, in case of fire.

 

But dont worry.

 

[Russell griffiths]

I think I’m going to fill around the cables with fire mastic and then a good dollop of fire foam around them and wait for building control to comment.