Rigid Insulation R Value Per Inch

Each type comes with unique advantages.

Rigid insulation r value per inch.

It also is the least expensive. Asbestos cement board r value. 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. Eps has the lowest average r value of the three most common types of rigid foam insulation around r 4 per inch.

The time of testing. Estimated r value of asbestos insulation per inch for pipe insulation corrugated paper. 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. Asbestos cement shingle siding.

This product typically has an r value of 3 6 to 4 0 per inch of thickness. Eps is the insulation used most widely in insulated concrete forms and structural insulated panels sips. Asbestos loose packed fibers powder. 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.

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. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market. Asbestos lagging and paste will have a lower value. This type of rigid foam usually comes with a reflective foil facing on both sides so it can also serve as a radiant barrier.

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. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. 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.

Products with a higher r value have a higher cost but have an increased capacity to resist heat flow and therefore provide greater insulation. 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. Eps is suitable for ground contact and can be treated to resist insects. When choosing rigid foam insulation you have three main options.

Also called styrofoam insulation this is the least expensive material. Asbestos corrugated paper pipe insulation. It provides r values that range from 3 6 to 4 2 per inch. For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings.