Iso Board Insulation R Value

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.

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. Excellent lttr value compared to any other fm class 1 rated products of equivalent thickness. High r value polyiso has a high r value per inch compared to other insulation products. Polyiso insulation thickness r value chart.

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. This insulation board is probably one of the most widely used foam board insulation products in the residential construction industry. Select 2 to 4 items to compare. Firestone iso 95 gl insulation the highest thermal ratings.

R 7 5 scored squared edge rigid foam board insulation sheathing model 88wd view the owens corning exterior insulation. 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. Xps has an r value of 4 5 to 5 0 per inch of thickness. R values for commonly available thicknesses of polyisocyanurate insulation board.

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. Owens corning foamular 150 1 1 2 in. Understanding r value thursday december 13 2018 what does r value mean. 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.

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. Extruded polystyrene foam xps also known as blue board or pink board comes in many different thicknesses and edge profiles. Firestone iso 95 gl insulation offers high energy efficiency through the r value ratings per inch versus other insulation materials. Getting the interim update.