Thermalite type 3 expanded polystyrene insulation table of physical properties eps eps physical property units si astm test minimum thermalite t3 imperial metric procedure requirement t3 test results thermal resistance hr ft 2 of m2 oc c177 76 4 2 min 4 3 min r value at 75o 24oc btu 1 in.
Type 3 type 4 rigid insulation.
R 3 graphite radiant barrier wall insulation kit 9 sheets kit multipurpose high density insulation kit r10 2 3 8 in.
For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings.
Foamular 250 3 in.
Sticky mesh heavy duty.
Also called styrofoam insulation this is the least expensive material.
It has high water resistance and an r value of 0 88 25 mm 5 0 per inch of thickness.
Falls in the middle of the three types of rigid foam insulation in both cost and r value used most in walls or below grade applications recyclable and at about r 5 per inch costs around 42 per sq.
Greenguard type 4 xps insulation board comprises 1 2 to 3 thick closed cell polystyrene xps with a minimum compressive strength of 30 psi.
R 15 scored squared edge rigid foam board insulation sheathing.
Products with a higher r value have a higher cost but have an increased capacity to resist heat flow and therefore provide greater insulation.