Rigid Insulation R Value Per Inch

The r value for foamular xps insulation is provided from testing at two mean temperatures 40ºf and 75ºf and from two aging conditioning techniques 180 day realtime aged as mandated by astm c578 and a method of accelerated aging sometimes called long term thermal resistance lttr per can ulc s770 03.

Rigid insulation r value per inch.

The time of testing. 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. Falls in the middle of the three types of rigid foam insulation in both cost and r value used most in walls or below grade applications recyclable and at about r 5 per inch costs around 42 per sq. 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.

It provides r values that range from 3 6 to 4 2 per inch. This type of rigid foam usually comes with a reflective foil facing on both sides so it can also serve as a radiant barrier. When choosing rigid foam insulation you have three main options. Each type comes with unique advantages.

Thermal conductivity k 0 15. Eps is the insulation used most widely in insulated concrete forms and structural insulated panels sips. 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. Asbestos loose packed fibers powder.

Asbestos corrugated paper pipe insulation. Eps has the lowest average r value of the three most common types of rigid foam insulation around r 4 per inch. The r value at 180 day real. 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.

The r value for foamular xps insulation is provided from testing at two mean temperatures 40ºf and 75ºf and from two aging conditioning techniques 180 day real. Also called styrofoam insulation this is the least expensive material. Asbestos cement shingle siding. Products with a higher r value have a higher cost but have an increased capacity to resist heat flow and therefore provide greater insulation.

Estimated r value of asbestos insulation per inch for pipe insulation corrugated paper. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Asbestos lagging and paste will have a lower value. Eps is suitable for ground contact and can be treated to resist insects.

Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. Asbestos cement board r value. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market.