Rigid Roof Insulation R Value

Rigid insulation is usually made up of fibrous materials or plastic foams.

Rigid roof insulation r value.

Foamular xps roof insulation for commercial buildings page 5 foamular xps roof insulation for commercial buildings foamular xps insulation is a rigid foam insulation which meets the needs of today s design professionals for a truly sustainable insulation product. Rigid polyisocyanurate thermal insulation board. Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same.

Firestone iso 95 gl polyiso insulation has a higher r value than other insulation products while also outperforming competitive polyiso at low temperature. R3 r18 r21 total roof r value. With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness. As part of that standard the products must meet r value requirements presented as long term thermal resistance lttr.

R matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation r matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation board composed of environmentally sound closed cell polyisocyanurate foam bonded to a durable white matte non glare aluminum facer and a reflective reinforced aluminum facer. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Owens corning insulation products help improve thermal performance and control moisture in commercial institutional and. All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered.

Depending on the type of insulation you choose and the desired r value you want for your facility you may need to build up a few layers of insulation. This product is suitable for use in wall sheathing applications in new. I calculate insulation resistance to heat loss or r percentage improvement always as relative to the original number. As foam ages over time air and blowing agents diffuse in and out of the foam structure resulting in reduced r value.

The r value is a measurement of the heat loss and heat gain. Firestone isogard polyiso insulation goes even further and was the first product on the market to meet both astm c1289 required and recommended thermal performance values. Rigid insulation r value by comparison usually ranges from r 4 0 to 6 5 and may get as high as r 8 7 depending on the insulation material. When it comes to insulation performance the difference is in the details.

For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3. After the roof deck is ready the rigid foam insulation is installed.