Tue, 19 Dec 2023 04:02:03 +0000 http://www.greenbuildingforum.co.uk/newforum/ Lussumo Vanilla 1.0.3 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18050&Focus=304599#Comment_304599 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18050&Focus=304599#Comment_304599 Thu, 14 Dec 2023 16:22:36 +0000 greenfinger
I've got a wood burner installed in a builder's opening. Single wall flue into a flexible chimney liner. The thin steel closure plate is higher than the lintel in front - i.e. you can't see it when stood in front of the stove. I therefore often wonder how much heat gets "trapped" in that pocket of space behind the lintel, and subsequently escapes through the closure plate into the chimney void.

So I've been thinking about insulating above the closure plate using mineral wool and wondered what people think to the idea? I've not come across much info of people doing that. Seems sensible to me but perhaps I'm overlooking something.

I did mention it to the chimney sweep when he was last here and he was against the idea. Not sure how much I trusted his opinions though (on that and other things!). One of his concerns was the mineral wool combusting. I told him that in my limited knowledge it's not combustible but he wasn't having any of it!

Any thoughts?

Many thanks]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18050&Focus=304600#Comment_304600 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18050&Focus=304600#Comment_304600 Thu, 14 Dec 2023 17:30:11 +0000 Dominic Cooney I don't see any problem with mineral wool, it isn't flammable.]]> http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18050&Focus=304602#Comment_304602 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18050&Focus=304602#Comment_304602 Thu, 14 Dec 2023 17:34:40 +0000 tony http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18050&Focus=304605#Comment_304605 http://www.greenbuildingforum.co.uk/newforum/comments.php?DiscussionID=18050&Focus=304605#Comment_304605 Fri, 15 Dec 2023 07:51:20 +0000 philedge
An insulated and therefore hotter flue accumulates far less soot and doesn't need sweeping anywhere near as much. Our liner is uninsulated up till first floor ceiling height and insulated thereafter and we have no soot whatsoever. I sweep the liner every 3-5 years and get maybe a third of a builders bucket of light grey Ash out of the flue and top of the stove. We run the fire hot and only burn well seasoned wood but couple those with an insulated/hot flue and the flue stays clean for years.]]>