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Loft insulation U values. Where to find a chart?
Hi.
I need a basic chart showing the heat losses through a loft area if there is no insulation, 50mm, 100mm up to the 265mm nominal 'perfect' insulation. Anyone know where there is one or the facts (validated) so I can draw one up for myself? Along the lines of... One sq metre of uninsulated plasterboard has a U value of... ? Ditto with 50 mm standard rolled fibre insulation. Ditto with 100 mm, 150 mm etc. It's so I can show someone a comparison so she can decide just when enough is enough compared with keeping spending more and more on more materiels. I am googling, and it's ongoing, but all I find so far is detailed tech guides or company ads. I'll bet someone on here has a link already!  Thanks. |
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