what are the numbers for on eps like 1# 2#?i have some 2"thick home depot eps that didn’t have silver tape or a clear side but the little tag said r-value of i think 3. what number would that be? i can also get the blue foam in a block what density or numbers do you recommend for that stuff?
Insulfoam:
Type 1 = 1 lb/cu ft R value (@ 75 degrees) = 3.85
Type VIII = 1.25 lb/cu ft R value = 3.95
Type II = 1.5 lb/cu ft R value = 4.17
Type IX = 2 lb/cu ft R value = 4.35
Not sure about blue stuff… maybe 2 lb/cu ft? Also, Insulfoam may be available in higher density by special order. Those numbers are off an old sheet of 1 1/2" panel.
i don’t think the stuff at h.d by me in south florida is insulfoam.
the stuff at Lowe’s is…don’t know about HD…but i’d imagine it is, as well.