Members of the building science group on LinkedIn agreed that, potentially, filling the gap between the vinyl siding and the wall system takes away the major performance benefits of vinyl as an exterior cladding.
Insulated Vinyl Siding Whether you like it or not, vinyl is the number one siding in home building. You can make the product better by using vinyl that’s fused with foam (if your budget allows). Not only do you get an air and moisture infiltration barrier, but you also get a thermal break that stops heat transmission. Moreover, boards can be installed straighter, so walls look better. www.vinylsiding.org.