Got a few quotes for the flat roof... from 2 recommended companies... I would appreciate any help on understanding the quality of the of the different materials proposed...
1) a layer of thermovent, layer of ht125, layer of ht250 cap sheet - £800 2) High tensile kemperol - £950 3) a layer of thermovent, 2 layers of fibre based felt (36kg/20m roll) -£1000 4) a layer of thermovent, layer of ht180, layer of ht350 cap sheet - £1350Is thermovent insulation? I think the ht ones are polyester felts ... is the difference between 1) &
4) worth the price? What does the quality of 3) sound like...? Anyone any experience of Kemperol (some sort of plastic?) waterproofing?All are written "estimates" + vat... but at least from recommended companies. Thanks Andy