Cold draft from roof lanterns
Discussion
We have an flat roof extension with two lanterns and an external flue for a wood burner. It was only finished last year. I’ve noticed a cold draft from the lanterns and flue. The flue draft was solved by filling the cavity above the stove with rock wool (it’s a warm roof). However the draft from the lanterns is still there slightly.
I can’t tell if the draft is getting in via the lanterns - I can’t see any obvious gap. Or it is coming in vi the lead flashing around the flue and then moving through the roof and exiting into the room via the lanterns.
I could seal up the gap between the plasterboard and the lantern glass? And/or seal around the lead flashing but I don’t see people doing this. Any ideas? The problem goes away when the wood burner is on rather than the radiator but it’s a bit annoying.
I can’t tell if the draft is getting in via the lanterns - I can’t see any obvious gap. Or it is coming in vi the lead flashing around the flue and then moving through the roof and exiting into the room via the lanterns.
I could seal up the gap between the plasterboard and the lantern glass? And/or seal around the lead flashing but I don’t see people doing this. Any ideas? The problem goes away when the wood burner is on rather than the radiator but it’s a bit annoying.
snowman99 said:
We have an flat roof extension with two lanterns and an external flue for a wood burner. It was only finished last year. I’ve noticed a cold draft from the lanterns and flue. The flue draft was solved by filling the cavity above the stove with rock wool (it’s a warm roof). However the draft from the lanterns is still there slightly.
I can’t tell if the draft is getting in via the lanterns - I can’t see any obvious gap. Or it is coming in vi the lead flashing around the flue and then moving through the roof and exiting into the room via the lanterns.
I could seal up the gap between the plasterboard and the lantern glass? And/or seal around the lead flashing but I don’t see people doing this. Any ideas? The problem goes away when the wood burner is on rather than the radiator but it’s a bit annoying.
I might be missing something, but all of that looks like an impressive bodge to me.I can’t tell if the draft is getting in via the lanterns - I can’t see any obvious gap. Or it is coming in vi the lead flashing around the flue and then moving through the roof and exiting into the room via the lanterns.
I could seal up the gap between the plasterboard and the lantern glass? And/or seal around the lead flashing but I don’t see people doing this. Any ideas? The problem goes away when the wood burner is on rather than the radiator but it’s a bit annoying.
moles said:
The wood burner outlet pictured is just the lead cowl ain’t it over the upstand?, it’s got a longer pipe with a mesh type terminal I take it?.
There is definitely a pipe of some sort under the lead up stand-I remember when it was installed. I can’t expose that now though. The lead goes to an upside down cone then twin wall flue which goes up a few metres more out of the pictures.Edited by snowman99 on Wednesday 26th February 19:19
mintybiscuit said:
Pothole said:
Any chance of some even smaller, crappier pictures?
Why do you always have to be a tt ?You have been here long enough to know how to click on an image to enlarge !
I made an error. I never hold myself up as perfect. (I try not to call people names, too. Give that a go)
OP, that lead flashing looks awful. I'm not a builder, I'm not even very good at DIY. I'd be ashamed to have done a job that looked like that...
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