Fitted a new stove..

[warlock]

Hi All,

I wonder if anyone can help. I've fitted a new stove, all sealed round the collar with rope and fire cement, all lovely.

But where the flue goes up through the roof there's a bit of a gap, what do I seal that with? Will fire cement do or should I use fire mastic?

Thanks in advance, Rob.

[Guest]

Hi All,

I wonder if anyone can help. I've fitted a new stove, all sealed round the collar with rope and fire cement, all lovely.

But where the flue goes up through the roof there's a bit of a gap, what do I seal that with? Will fire cement do or should I use fire mastic?

Thanks in advance, Rob.

I packed the gap with some asbestos rope, and finished off with high temp silicone. I think silicone allows some movement for expansion of the flue.

[nb Innisfree]

I packed the gap with some asbestos rope, and finished off with high temp silicone. I think silicone allows some movement for expansion of the flue.

 

 

Didn't know asbestos was still available, or do you mean fibreglass rope?

[dor]

You MUST allow movement as the expansion of the flue will be significant and can crack the top of the stove if it isn't allowed for.

 

Use high temp silicone on the top. Ideally the flue should be floating with a gap above the top of the stove, and use high temp silicone there as well. Fire cement will only crack anyway and is a potential source of CO leakage.

[warlock]

I packed the gap with some asbestos rope, and finished off with high temp silicone. I think silicone allows some movement for expansion of the flue.

This is what I did...thanks for the advice folks.

[Guest]

Didn't know asbestos was still available, or do you mean fibreglass rope?

Showing my age, I mean fibreglass

[Keeping Up]

Not only does fire cement crack - but I wasted money on buying black fire cement. It is black until it dries out (which means either a wait of a few weeks, or else just the first time you use the stove) and then it turns white.