This month nrca has revised and updated its recommen.
Polyiso insulation r value per inch.
And the change in lttr values effective january 1 2014.
Polyiso insulation is the best choice as a cost effective energy efficient and environmentally responsible insulation product.
Jm is proud to be a pima member and have its product third party certified under the pima quality mark program.
In service r values of 5 0 per inch thickness in predominant.
Let s use the r value of iko s polyiso insulation enerfoil tm as an example.
With the publication of this interim update nrca has revised its design in service r value rec ommendation to 5 0 per inch thickness in all climate conditions.
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.
It has one of the highest r values per inch of thickness among common insulations.
Of polyisocyanurate insulation used in roof systems.
However labeled r value differs from in service r value for many insulations.
Keep in mind that polyiso s r value increases with thickness.
A high r value per inch compared to other insulation products used in commercial and residential construction.
Polyiso has a high r value per inch compared to other insulation products.
Building science corporation bsc and others have been examining this difference.
An exclusive third party thermal performance certification.
This highly effective combination of materials offers a higher r value per inch compared to traditional flat sheet rigid foam insulation.
Polyiso s unique benefits include highest r value per inch.
A true environmental winner polyiso is a good choice for leadership in energy and environmental design leed credits.
Polyiso still remains the highest r value per inch of any available insulation.
R value chart for enerfoil tm rigid foam faced insulation conditioned per atsm c1289 test method astm c518 1 2.
Polyisocyanurate insulation is a common commercial and residential roof and wall insulation.
Outstanding installed cost advantages and economical cost per r value.
The increase in thermal resistance for thicker products is due to the reduced contribution of more thermally conductive elements such as the facer and the denser cell.
Polyiso has the highest r value per inch of any rigid board insulation.