Iso Board Insulation R Value

A higher r value means that the insulation will do a better job of holding in conditioned air whether that s heat in the winter or cool air in the summer.

Iso board insulation r value.

Get free shipping on qualified iso foam board insulation or buy online pick up in store today in the building materials department. R values for commonly available thicknesses of polyisocyanurate insulation board. Understanding r value thursday december 13 2018 what does r value mean. R 7 5 scored squared edge rigid foam board insulation sheathing model 88wd view the owens corning exterior insulation.

Extruded polystyrene foam xps also known as blue board or pink board comes in many different thicknesses and edge profiles. Select 2 to 4 items to compare. Xps has an r value of 4 5 to 5 0 per inch of thickness. Polyiso is unique in that the r value increases with the thickness of the foam so three inches of polyiso has a higher r value per inch than two inches.

In addition to nrca s design in service r value recommenda tions for polyisocyanurate insulation nrca recommends design ers specify polyisocyanurate insulation by its desired thickness and not lttr or r value to avoid possible confusion. Firestone iso 95 gl insulation offers high energy efficiency through the r value ratings per inch versus other insulation materials. Owens corning foamular 150 1 1 2 in. This insulation board is probably one of the most widely used foam board insulation products in the residential construction industry.

Compatible with all types of commercial roofing systems the lightweight easy to handle insulation is especially suited for direct application on fm approved and ul classified steel roof deck assemblies. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. Polyiso insulation thickness r value chart. High r value polyiso has a high r value per inch compared to other insulation products.

Getting the interim update. The thermal resistance r value of isoboard is calculated by dividing the thickness of the isoboard by the thermal conductivity k value to achieve the table below. The thermal conductivity k value of new isoboard is 0 024w m c and that of 5 year aged isoboard at 90 relative humidity is 0 03w m c which is referred to as the long term design value. Because it s highly energy efficient with the highest r value ratings per inch the use of iso 95 gl insulation in a firestone roofing system provides a cost effective solution for today s oof design r challenges and is preferred for any and every roofing system.