Polyiso Roof Insulation R Value

No more insulation should be installed than can be completely covered with roofing on the same day.

Polyiso roof 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. Astm c1289 standard change. Firestone isogard polyiso insulation goes even further and was the first product on the market to meet both astm c1289 required and recommended thermal performance values. All polyiso products follow astm c1289 standard specification for faced rigid polyisocyanurate thermal insulation board.

In the nrca roofing manual. Polyiso roof insulation is the most widely used product for low slope commercial roofing and provides a high r value that helps meet today s energy code requirements without the added thickness or weight of other products. Benefits of energyguard polyiso roof insulation include. More projects select polyiso roof insulation for both new and roof replacement systems than any other insulation.

As part of that standard the products must meet r value requirements presented as long term thermal resistance lttr. Carlisle s tapered insulation helps promote rooftop drainage while providing excellent insulating value. Fm approved subject to the conditions of approval as a roof insulation when installed as shown in the current edition of the factory mutual research approvals guide. Tapered polyiso minimizes the negative effects of ponding water and extends the service life of a roof.

Bundle wrap is not for use as waterproofing for boards. Firestone iso 95 gl polyiso insulation has a higher r value than other insulation products while also outperforming competitive polyiso at low temperature. New polyisocyanurate r values is a 2 page 2016 industry issue update from the national roofing contractors association nrca. As unprotected polyisocyanurate will burn fire safety precautions should be observed wherever insulation products are used.

As foam ages over time air and blowing agents diffuse in and out of the. 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. This industry issue update explains why the nrca recommends using a significantly lower r value for polyiso than pima does.

Polyiso has a high r value per inch compared to other insulation products. Membrane roof systems 2011 and the nrca roofing manual. Recommended reading for anyone specifying polyiso insulation. Dated its r value recommendations for polyisocyanurate insulation used in roof systems.

Polyiso insulation thickness r value chart.