Intumescent paste/mastic question

[matskm]

Hi All,

I am boxing off a bunch of pipes in the garage (soil pipe, hot and cold water pipes) because Building Control said I need to. There are a few places where the plasterboard which is going on top of the timber framing will have to be "notched" to accomodate small water pipes.

Building control suggested I fill in the gaps between the pipes and edge of the board with intumescent paste/mastic. Does this sound like a good idea?

It seems to be that some of the gaps will be large (one pipe sits about 7 cm from the wall, so the "gap" will be (5x2 cm) ) - and this sounds too much for mastic.

Also, does anyone know what exact product to buy?

Apologies if this is the wrong forum for the topic.

cheers

Mat

 

[RickMoore]

Intumescent mastic is what u want for sealling gaps. Larger holes need firestopping. The correct way to do it is to use coated fire batt then mastic over it. I've seen loads passed though that have been stuffed with fiberglass and masticed over. If possible you should do both sides of the wall

 

[RickMoore]

Sorry just reread your post. The svp needs an Intumescent collar on it also.

 

[matskm]

Hi Rick - what is svp?

 

[sooey]

soil & vent pipe

 

[matskm]

Right

I've boxed the svp in from where it enters the ground right up to the ceiling. Would that mean I don't need to collar it?

cheers

Mat

 

[RickMoore]

Yes if its boxed in in the same material as the wall.