Highest R Vallue Roof

Amongst all of the popular types of insulation currently used by the industy spray foam insulation features the highest r value per inch.

Highest r vallue roof.

More r vale per dollar than any other rigid insulation. A truly green high performance economical roof insulation. For a very good introductory overview article on r value see r values over at the website of. Most cost effective insulation typically 25 50 less than other rigid insulations.

See the department of energy s doe ranges for recommended levels of insulation below. You should of course see the manufacturer provided technical data sheet for the r value of specific products. They contain low conductivity gases in the cells usually one of the hcfc or cfc gases. Highest r value per dollar most cost effective insulation solutions expanded polystyrene eps is a premier material for protecting homes foods and sensitive materials because of its cost effective efficient insulation qualities.

Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. In fact eps leads the pack when it comes to r value per dollar. R value of various materials. Cost polyiso is the most expensive of the foam board insulation products however it s the highest r value.

Polyurethane and polyisocyanurate are both closed cell foams. Read on to find what insulfoam project best fits your roofing or reroofing insulation needs. Recommended home insulation r values. R value measures how well certain building insulation materials can resist heat.

Spray foam insulation r values. Aerogel has an r value of about r 10 per inch is 99 air and insulates up to 37 times higher r value than fiberglass. When determining how much insulation you need don t guesstimate calculate. Know exactly how much you need with our project calculators.

R value doesn t degrade over time. Depending on where you live and the part of your home you re insulating walls crawlspace attic etc you ll need a different r value. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. For example energy star recommends r 30 for a roof in the southern united states r 38 for the middle of the country and r 49 for the northern part of the country.

Insulation level are specified by r value. R value is a measure of insulation s ability to resist heat traveling through it. The higher the r value the greater the insulation performance.