Styrofoam Insulation R Value Per Inch

Asbestos corrugated paper pipe insulation.

Styrofoam insulation r value per inch.

Asbestos cement board r value. The r value is r 3 5 to r 3 6 per inch so filling a 2 4 cavity yields about an r 13. For example closed cell spray foam depending on brand can offer an r 6 or r 7 per inch. Asbestos lagging and paste will have a lower value.

Thermal conductivity k 0 15. 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. Eps is suitable for ground contact and can be treated to resist. This foam board insulation is available with straight or tongue and groove edges to help limit air movement.

It provides about r 5 per inch. It provides r values that range from 3 6 to 4 2 per inch. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. 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. Some products have reinforced facing to make them sturdier. For a 1 in thick 4 8 panel. For example a wall with 3 fiberglass batting r value of 10 8.

It also is the least expensive. The r value of. 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. All these have r values ranging from r 3 2 to r 3 8 per inch.

Expanded polystyrene eps eps is the insulation used most widely in insulated concrete forms and structural insulated panels sips. It is denser than eps and provides more r value with a rating of 5 per inch of thickness. Eps has the lowest average r value of the three most common types of rigid foam insulation around r 4 per inch. Choose this option for areas that need a good amount of strength and water resistance.

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. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market. Asbestos cement shingle siding. 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.

This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. This product typically has an r value of 3 6 to 4 0 per inch of thickness. Closed cell spray foam insulation. Closed cell spray foam r values.