Whats best insulation undercarpet- layers or thick underlay

Postby Warcorro » Fri Mar 05, 2010 2:47 pm


Cant insulate under our draughty floorboard floor as too little crawl space. Am choosing between a really thick underlay 12mm Swaledale 54oz with 3.7 tog, or using 3mm Barrier or 5mm fibreboards in combination with 11 mm Cloud 9 cumulus.

Any thought on which approach is best?
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