Polyiso Rigid Insulation R Value Per Inch

R value chart for enerfoil tm rigid foam faced insulation conditioned per atsm c1289 test method astm c518 1 2. 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. Let s use the r value of iko s polyiso insulation enerfoil tm as an example.

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Polyiso offers the highest r value per inch of any rigid foam board insulation.

Polyiso rigid insulation r value per inch.

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

The higher the r value the better the thermal performance of the insulation. Lttr is a 15 year time weighted method based on customer s insulation needs. 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.

This type of rigid foam usually comes with a reflective foil facing on both sides so it can also serve as a radiant barrier. Thermal performance is measured using derivative of the r value known as the long term thermal resistance lttr method. Resista polyiso is an economical choice offering protection against fire wind and mold. Johns manville polyiso foam sheathing insulation boards provide a continuous layer of insulation to reduce thermal bridging and improve energy efficiency.

Available values range from 5 6 to 27 3. 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. 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. Polyiso provides one of the highest r values per inch of any rigid insulation r 6 0 at 1 inch.

When choosing rigid foam insulation you have three main options. 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. A key component to polyiso s sustainability is r value.

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