Rigid Foam Roof Insulation R Value

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

Rigid foam roof insulation r value.

When determining how much insulation you need don t guesstimate calculate. The higher the r value the greater the insulation performance. Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. Know exactly how much you need with our project calculators.

With premium polyiso manufacturing atlas is able to produce the highest effective r values with minimal material thickness. R value measures how well certain building insulation materials can resist heat. 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. After the roof deck is ready the rigid foam insulation is installed.

For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. When it comes to insulation performance the difference is in the details. All products in the acfoam polyiso roof insulation family are closed cell rigid foam insulation board flat or tapered. 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.

Expanded polystyrene insulation is similar to the foam used for packing peanuts and it s typically used for insulated concrete forms also knows as icf s. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market. This product typically has an r value of 3 6 to 4 0 per inch of thickness. The r value is a measurement of the heat loss and heat gain.

It s made of environmentally sound closed cell polyisocyanurate foam bonded to a durable white matte non glare aluminum facer and a reflective reinforced aluminum facer. The r value for foamular xps insulation is provided from testing at two mean temperatures 40ºf and 75ºf and 180 day real time aged as mandated by astm c578. 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. The r value at 180 day real time age and 75ºf mean temperature is commonly used to compare products and is the value printed on the product.

Included is our r value guide detailing the suggested amount of insulation dependent upon zone as provided by the u s. Johns manville r panel rigid roof insulation board offers r values of up to r 23 6 providing high thermal efficiency.