Polyiso Rigid Insulation R Value Per Inch

Available values range from 5 6 to 27 3.

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. Polyiso consists of a uniform closed cell polyisocyanurate foam core and provides one of the highest r values per inch of any rigid insulation. This is a measure of insulation s ability to resist heat traveling through it. 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.

Johns manville polyiso foam sheathing insulation boards provide a continuous layer of insulation to reduce thermal bridging and improve energy efficiency. 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. This type of rigid foam usually comes with a reflective foil facing on both sides so it can also serve as a radiant barrier. Resista polyiso is an economical choice offering protection against fire wind and mold.

Furthermore when properly installed ap foil faced polyiso continuous insulation functions as a water resistive barrier vapor barrier and air barrier eliminating the need to install additional components. R value of 5 0 per inch. If you want to determine minimum r value requirements per ashrae 90 1 consider using energywise roof calculator online. 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.

Lttr is a 15 year time weighted method based on customer s insulation needs. The higher the r value the better the thermal performance of the insulation. When choosing rigid foam insulation you have three main options. Polyiso offers the highest r value per inch of any rigid foam board insulation.

Let s use the r value of iko s polyiso insulation enerfoil tm as an example. R value chart for enerfoil tm rigid foam faced insulation conditioned per atsm c1289 test method astm c518 1 2. Thermal performance is measured using derivative of the r value known as the long term thermal resistance lttr method.