Polyiso Rigid Insulation R Value Per Inch

Resista polyiso is an economical choice offering protection against fire wind and mold.

Polyiso rigid insulation r value per inch.

In addition to design in service r value nrca recommends designers specify polyisocyanurate insulation by its desired thickness and not lttr or r value to avoid possible. Known as polyiso for short polyisocyanurate foam has the highest r value per inch r 6 5 to r 6 8 of any rigid insulation. Let s use the r value of iko s polyiso insulation enerfoil tm as an example. If you want to determine minimum r value requirements per ashrae 90 1 consider using energywise roof calculator online.

Polyiso offers the highest r value per inch of any rigid foam board insulation. A key component to polyiso s sustainability is r value. R value chart for enerfoil tm rigid foam faced insulation conditioned per atsm c1289 test method astm c518 1 2. With thicknesses varying from 1 4 5 inches resista polyiso uses firestone s proprietary isogard foam technology to create an impressive insulating value per inch which can translate into significant energy savings.

In nrca s opinion this design in service r value more closely represents conditions in the built environ ment than lttr or tested r value. This is a measure of insulation s ability to resist heat traveling through it. When choosing rigid foam insulation you have three main options. Johns manville polyiso foam sheathing insulation boards provide a continuous layer of insulation to reduce thermal bridging and improve energy efficiency.

Polyiso consists of a uniform closed cell polyisocyanurate foam core and provides one of the highest r values per inch of any rigid insulation. H shield cg hunter panels the big news the r value of insulation is r value chart caflei polyiso manufacturers turn blind eye to cellulose insulation vs foamrigid insulation r value per inch chart hoskinr value of polyisocyanurate insulation chart boskinrigid insulation r value chart koskintsp 3 page rmaxpir polyisocyanurate boards insulation thermalinsulation r values. Lttr is a 15 year time weighted method based on customer s insulation needs. Thermal performance is measured using derivative of the r value known as the long term thermal resistance lttr method.

Available values range from 5 6 to 27 3. R value of 5 0 per inch. The higher the r value the better the thermal performance of the insulation.