Type 3 Type 4 Rigid Insulation

When using rigid insulation in residential and commercial properties the most common boards used would be polyiso polyisocyanurate eps or xps each type of insulation board are very different and carry different r values and compressive strength.

Type 3 type 4 rigid insulation.

It has high water resistance and an r value of 0 88 25 mm 5 0 per inch of thickness. Greenguard type 4 xps insulation board comprises 1 2 to 3 thick closed cell polystyrene xps with a minimum compressive strength of 30 psi. Products with a higher r value have a higher cost but have an increased capacity to resist heat flow and therefore provide greater insulation. For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings.

Also called styrofoam insulation this is the least expensive material. It provides r values that range from 3 6 to 4 2 per inch. 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. R 3 graphite radiant barrier wall insulation kit 9 sheets kit multipurpose high density insulation kit r10 2 3 8 in.

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. R 15 scored squared edge rigid foam board insulation sheathing.