Rigid Insulation R Values Per Inch

Choose this option for areas that need a good amount of strength and water resistance.

Rigid insulation r values per inch.

The time of testing. Asbestos loose packed fibers powder. Estimated r value of asbestos insulation per inch for pipe insulation corrugated paper. It provides r values that range from 3 6 to 4 2 per inch.

This product typically has an r value of 3 6 to 4 0 per inch of thickness. For example a wall with 3 fiberglass batting r value of 10 8. 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. 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.

This material offers the highest r values about r 6 to 6 5. Most insulation manufacturers will first list their insulation s r value for a one inch sample then they ll give you a chart demonstrating the other r values you can achieve if you install a thicker version of their product. 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. Although the nominal r value of polyiso is the highest of the three major types of rigid foam its cold weather performance is lower.

Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. As the temperature drops so does the r value. Let s use the r value of iko s polyiso insulation enerfoil tm as an example. Some builders working in cold climates give it an r value of 4 5 or 5 per inch.

Some products have reinforced facing to make them sturdier. It provides about r 5 per inch. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market. Asbestos cement shingle siding.

Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. Rigid insulation is usually made up of fibrous materials or plastic foams. Thermal conductivity k 0 15. 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 board r value. Polyiso is not rated for ground contact. 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.