The best replacement for foam insulation is fiberglass.

The best alternatives to foam insulation are rated as following:

★★★★★	fiberglass
★★★★★	cellulose
★★★★	fiberglass insulation
★★★	batt insulation
★★★	radiant barrier
★★	blown insulation
★	cellulose insulation
★	batt
★	blown in
★	blown in insulation
	fibreglass
	icynene
	closed cell foam insulation
	radant bearer
	closed cell
	blown cellulose insulation
	tyvek
	icf
	nuwool cellulose
	open cell foam insulation

Your alternative for foam insulation is not listed? Suggest!

Speaking about foam insulation, one probably shouldn't forget about vapor barrier.

Other search terms related to foam insulation and their ratings are:

★★★★★	vapor barrier
★★★★★	radiant barrier
★★★	heat tape

You have in mind a companion for foam insulation and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of foam insulation in all years. Click on graph for more.

foam insulation

fiberglass

cellulose