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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Celotex/Kingspan in a fire + fitting question
Hi
[Preamble, Questions at end] We're going to move in with my Dad next year - we're redoing bits of the dormer loft conversion of his bungalow. Now, upon inspection, the current insulation in the roof voids is manky glass wool - yuk. Broken, falling away and very dusty. I hate glass wool, partly as I a) have to get around the voids to fix some electrics + install networking, and b) I'm going to use the voids as supplimentary storage space for light items. I find it unpleasant and a skin irritant. I also don't want the fibers going anywhere near my baby daughter. Also, it's too knackered to be doing much good. I also want to insulate the roof, not the floor as I want the voids to run warm to protect the stuff I'm storing. So I thought about using either Celotex/Kingspan to 50mm, leaving 50mm breathing space in the rafters under the tiles - or rockwool slabs. Rockwool in slab form is possibly less disgusting than glass wool - at least once fitted (anyone care to comment?) but I believe from reading around I'll get better insulation with Celotex or it's like at 50mm. [Questions] a) What's celotex like to cut - use a knife or a saw? b) In a fire, does it pose any risk of giving off noxious fumes? c) Does having an endothermic but still combustible material like celotex packed around electric cables bother you? Thanking you kindly :-) Timbo -- Tim Southerwood Website: http://www.dionic.net/ |
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