Since the product often costs more per square foot than 1 inch thick rigid foam rated at r 5 why would anyone use bubble wrap as insulation.
Foil roof insulation reviews.
The r value of foil faced bubble wrap is so low that it has few if any advantages over rigid foam.
When installing a foil type barrier it s important to allow the material to droop between the attachment points to make at least a 1 0 inch 2 5 cm air space between it and the bottom of the roof.
Currently the best foil insulation is the aes radiant barrier.
Most brands of foil faced bubble wrap are only 3 8 inch thick or less and have an r value of only 1 0 or 1 1.
A warning about radiant barriers aka foil insulation.
Laughable isn t a very quantifiable term.
The most common form of loft insulation this comes in rolls of rock glass or mineral fibre we use earthwool by knauf which is a really good environmentally friendly option or else foil backed felt.
A comparison review of multi foil insulation products superquilt thermaquilt sf19 triso super 10 tlx silver ybs insulation superfoil actis tlx.
It s generally the cheapest option and good all purpose insulation especially for between joists.
In fact a florida solar energy center study which compared different roofing materials with various venting ratios and with or without radiant barrier systems rbs found that a black shingled roof vented at 1 300 vent area to ceiling area with an rbs had a 6 1 reduction in attic temperature at design maximum summer conditions and a 26 4.
Wiki researchers have been writing reviews of the latest foil insulations since 2017.