Styrofoam Insulation R Value Per Inch

This product typically has an r value of 3 6 to 4 0 per inch of thickness.

Styrofoam insulation r value per inch.

Why spray foam insulation is so effective in meeting code requirements is that it has a higher r value per inch of product used than batts. Closed cell spray foam insulation. This foam board insulation is available with straight or tongue and groove edges to help limit air movement. For example a wall with 3 fiberglass batting r value of 10 8.

Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. It is denser than eps and provides more r value with a rating of 5 per inch of thickness. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch.

Eps is suitable for ground contact and can be treated to resist. Eps has the lowest average r value of the three most common types of rigid foam insulation around r 4 per inch. Asbestos cement board r value. Thermal conductivity k 0 15.

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. It provides about r 5 per inch. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market. It also is the least expensive.

Asbestos lagging and paste will have a lower value. Choose this option for areas that need a good amount of strength and water resistance. 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.

It provides r values that range from 3 6 to 4 2 per inch. For a 1 in thick 4 8 panel. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. Asbestos loose packed fibers powder.

Estimated r value of asbestos insulation per inch for pipe insulation corrugated paper. Asbestos corrugated paper pipe insulation. Closed cell spray foam has a far better r value per inch than other less effective insulations like cellulose fiberglass or even open cell foam. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13.

The r value of. All these have r values ranging from r 3 2 to r 3 8 per inch. Also called styrofoam insulation this is the least expensive material. Expanded polystyrene eps eps is the insulation used most widely in insulated concrete forms and structural insulated panels sips.