R Value Of Polyurethane Foam Board

0 55 in x 4 ft x 8 ft residential sheathing square edge 1 faced polystyrene garage door foam board insulation with sound barrier item 15348 model 201549.

R value of polyurethane foam board. To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. This product typically has an r value of 3 6 to 4 0 per inch of thickness. It provides r values that range from 3 6 to 4 2 per inch. Polyisocyanurate polyurethane foam insulation r values.

Vacuum insulated panels have the highest r value approximately r 45 in u s. Owens corning foamular 250 extruded polystyrene xps rigid foam insulation is a closed cell highly moisture resistant rigid foam board well suited to meet the needs for a wide variety of residential and commercial construction applications. 0 55 in x 4 ft x 8 ft. 2 in x 4 ft x 8 ft 1 faced polystyrene garage door foam board insulation item 15357 model 2x48x96 r tech.

Aerogel has the next highest r value about r 10 to r 30 per inch followed by polyurethane pur and phenolic foam insulations with r 7 per inch. Aging effects comments. 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. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed in your attic to reach r 30 if you live in zones 2 or 3.

Rsi r value système international is the metric equivalent. It provides about r 5 per inch. Expanded polystyrene foam eps is the cheapest and least used foam board product on the market. Note from this chart that the ideal r value differs for each part of your home.

Insulation or other building material 9. 2 in x 4 ft x 8 ft. To convert rsi to r value multiply the rsi by 5 67826. Thanks to thanks to andrew cole for correcting our data on this product.

Choose this option for areas that need a good amount of strength and water resistance. Some products have reinforced facing to make them sturdier. Initial 7 14 aged 6 8. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1 93721.