Rigid Insulation R Value Per Inch

Products with a higher r value have a higher cost but have an increased capacity to resist heat flow and therefore provide greater insulation.

Rigid insulation r value per inch. 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. When choosing rigid foam insulation you have three main options. For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. 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. Because rigid foam plastic insulation products are not all aged in accordance with the same standards it is useful to publish comparison r value data. Asbestos cement shingle siding. Thermal conductivity k 0 15.

Asbestos corrugated paper pipe insulation. Estimated r value of asbestos insulation per inch for pipe insulation corrugated paper. Asbestos loose packed fibers powder. The time of testing.

This product typically has an r value of 3 6 to 4 0 per inch of thickness. 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. 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. This type of rigid foam usually comes with a reflective foil facing on both sides so it can also serve as a radiant barrier.

Each type comes with unique advantages. 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. Also called styrofoam insulation this is the least expensive material.

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. Eps is suitable for ground contact and can be treated to resist insects. It also is the least expensive. 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 cement board r value. 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.