Rigid Insulation R Values Per Inch

Asbestos cement shingle siding.

Rigid insulation r values 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. As the temperature drops so does the r value. 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.

Polyiso is not rated for ground contact. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market. 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. 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.

Estimated r value of asbestos insulation per inch for pipe insulation corrugated paper. 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. Choose this option for areas that need a good amount of strength and water resistance.

It provides r values that range from 3 6 to 4 2 per inch. Let s use the r value of iko s polyiso insulation enerfoil tm as an example. Asbestos loose packed fibers powder. 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.

Thermal conductivity k 0 15. For a 1 in thick 4 8 panel comes unfaced or with a number of different plastic facings. Some builders working in cold climates give it an r value of 4 5 or 5 per inch. It provides about r 5 per inch.

Although the nominal r value of polyiso is the highest of the three major types of rigid foam its cold weather performance is lower. The time of testing. This material offers the highest r values about r 6 to 6 5. Asbestos cement board r value.

Traditional loose fill insulation such as fiberglass or cellulose has an r value between r 2 0 and 3 5 per inch of thickness. Asbestos lagging and paste will have a lower value. 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.