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40+ sheets/half sheets rigid foam board polyisocyanurate - $1 (North Wilmington, DE)

40+ sheets/half sheets rigid foam board polyisocyanurate 1 thumbnail40+ sheets/half sheets rigid foam board polyisocyanurate 2 thumbnail40+ sheets/half sheets rigid foam board polyisocyanurate 3 thumbnail40+ sheets/half sheets rigid foam board polyisocyanurate 4 thumbnail40+ sheets/half sheets rigid foam board polyisocyanurate 5 thumbnail
condition: like new

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These polyiso rigid foam board sheets are both new and reclaimed from a church flat roof replacement. Because of the design of the flat roof that's required to have at least a nominal slope for the rainwater to run off to the gutters, many of the sheets are tapered from a larger thickness on one end to a slightly smaller thickness on the other end. Since the sheets are stacked in my garage and basment and not completely accessible without pulling them all out), I couldn't reach all sheets for a perfectly accurate measurements. Here's a pretty good count of what I have:

New:
Quantity (15) 1.5" thick tapered to 1" thick, 4' x 4' sheets
Quantity (6) 1.5" thick tapered to 1" thick, 4' x 8' sheets
Quantity (6) 1" thick, 4' x 4' sheets
Quantity (9) 1.5" thick, 4' x 8' sheets

I also have some reclaimed sheets:
Quantity (1) 2" thick, 4' x 4' sheets
Quantity (4) 1" thick, 4' x 4' sheets
Quantity (4) 1/2" thick, 4' x 4' sheets

All sheets have a thick paper backing on both sides. I insulated my coldest basement ceiling (ceiling joist cavities in a tuck-under garage) with these sheets and will spray foam the gaps. The sheets for sale are what's left over. I may keep some of them to insulate other parts of my basement. These are also good to insulate rim and band joist cavities or attic floor joist cavities as well. Anyone who knows about rigid foam board insulation knows that it's superior to fiberglass (blown and batt) and cellulose insulation because it prevents the all-important air infiltration. And polyiso has the highest R-value of all rigid foam board insulation at 6.6 per inch. Since these have a heavy paper backing rather than a foil backing, they are probably best suited for spaces without direct exposure to high humidity/moisture; though, if the exposed face of the board were painted with an exterior paint, I imagine it would prevent the paper backing from absorbing mositrure.

I have no idea how to price each sheet since there's no exact equivalent from Home Depot or Lowes, but for comparison, a 4' x 8' sheet of Sika Rmax Pro Select R-Matte 1" rigid foam board (R-6) is $40 at Home Depot. So make an offer for what you need.

post id: 7715367062

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