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Insulation batts

RogerS

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Very confused.

Looking at one suppliers site there are several at 50mm thickness. All seem to have broadly the same insulation factor but the pricing per m2 is widely different.

50mm DriTherm 37 Standard Cavity Slab Knauf £4.26

50mm Earthwool Flexible Insulation Slab Knauf £5.36

50mm Earthwool RS100 Universal Insulation Slab Knauf £7.84

50mm Earthwool RS60 Universal Insulation Slab Knauf £6.14

50mm Isover Cavity Wall Slabs £3.19

prices inc VAT
 
Buy the cheapest, Roger, unless you need a product which is particularly stiff. You'll likely find your local builder's merchant only stocks one sort of cavity batt. Their performance is much of a muchness.
 
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