Our r value guide to rigid insulation includes the doe s recommended insulation by zone chart r value calculator and base building material r values chart.
Polyiso rigid insulation r value chart.
For the united states market the applicable standard is astm c1289 standard specification for faced rigid cellular polyisocyanurate thermal insulation board.
With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness.
Foam board insulation types.
R value astm c1289 requires polyisocyanurate insulation be tested and found to have the minimum thermal resistances r values provided in astm c1289 s table 2 thermal resistance properties.
Notes on the r value k values of different forms of asbestos.
The requirements for measuring and reporting thermal resistance as well as minimum r values for polyiso products are described in two relevant product standards.
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Polyiso has a high r value per inch compared to other insulation products.
Hunter panels the innovator of polyiso insulation products an interesting thing happened 22 years ago when hunter set out to manufacture the absolute most effective efficient and innovative polyiso insulation panels available anywhere we also created the finest customer service organization and builder support team in the industry.
I ve written several posts about how to insulation basement walls in which i promote the use of foam board insulation as the first line of defense against moisture and mold.
There are three basic foam insulation board products on the.
Notes to the table above.
Spray foam pink fiberglas vs.
Updated recommendations although the lttr method for determining and reporting the.
Also product board or package marking must bear the product s tested r value.
Value testing of polyisocyanurate insulation and found r values lower than the current lttr values.
When it comes to insulation performance the difference is in the details.
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.
All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered.
Because of this i often get questions about which type of foam board insulation to use and what r values these products provide.
