Rigid Roof Insulation R Value

With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness.

Rigid roof insulation r value.

The r value is a measurement of the heat loss and heat gain. As foam ages over time air and blowing agents diffuse in and out of the foam structure resulting in reduced r value. After the roof deck is ready the rigid foam insulation is installed. Calculate percent improvement in r value.

All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered. Rigid insulation is one of the best tools to reduce your energy costs. Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. They keep your home at a comfortable temperature without the need to crank your heat.

Rigid foam insulation packs a lot of r value into a thin package but not all rigid foam performs the same. When it comes to insulation performance the difference is in the details. As part of that standard the products must meet r value requirements presented as long term thermal resistance lttr. Rigid foam insulation also known as insulating boards provide high r values.

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. 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. R3 r18 r21 total roof r value. Install it anywhere from the roof to the foundation.

You can even place it under the foundation slab. Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency. The increase r21 r3 exactly 18 the value by which you are increasing the r value. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

R panel is manufactured with a closed cell polyisocyanurate foam core bonded to fiberglass reinforced facers and designed for use over metal nailable and non nailable roof decks with a variety of membrane systems. Choose rigid insulation wisely and consider the effect its characteristics will have on the performance of the your project overall product cost and the best way to get the bang for your buck. 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. Rigid insulation is usually made up of fibrous materials or plastic foams.

I calculate insulation resistance to heat loss or r percentage improvement always as relative to the original number.