Styrofoam Insulation R Value Per Inch

Eps has the lowest average r value of the three most common types of rigid foam insulation around r 4 per inch.

Styrofoam insulation r value per inch.

It provides r values that range from 3 6 to 4 2 per inch. Some products have reinforced facing to make them sturdier. 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. Estimated r value of asbestos insulation per inch for pipe insulation corrugated paper.

For example a wall with 3 fiberglass batting r value of 10 8. It provides about r 5 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. Also called styrofoam insulation this is the least expensive material.

Thermal conductivity k 0 15. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. It is denser than eps and provides more r value with a rating of 5 per inch of thickness. Closed cell spray foam r values.

It also is the least expensive. Closed cell spray foam insulation. 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.

Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. All these have r values ranging from r 3 2 to r 3 8 per inch. Extruded polystyrene xps easily recognized by its blue green or pink color 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. Asbestos lagging and paste will have a lower value.

For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. For a 1 in thick 4 8 panel. The r value of. Eps is suitable for ground contact and can be treated to resist.

This product typically has an r value of 3 6 to 4 0 per inch of thickness. Expanded polystyrene eps eps is the insulation used most widely in insulated concrete forms and structural insulated panels sips. Choose this option for areas that need a good amount of strength and water resistance. Asbestos loose packed fibers powder.

This foam board insulation is available with straight or tongue and groove edges to help limit air movement. Asbestos cement board r value. Asbestos cement shingle siding. 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.