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Dow R-4, 0.75-in x 8-ft x 4-ft STYROFOAM Tongue and Groove 25 PSI Faced Polystyrene Garage Door Board Insulation with Sound Barrier
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STYROFOAM™ Brand Tongue and Groove\NInsulation features tongue and groove\Ntreatment on the long edges of these boards
It's a lightweight, moisture resistant and thermally efficient Type IV extruded polystyrene foam insulation
Suitable for a wide range of residential and commercial construction applications
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