Highest R Vallue Roof

More r vale per dollar than any other rigid insulation.

Highest r vallue roof. 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. For a very good introductory overview article on r value see r values over at the website of. A truly green high performance economical roof insulation. Spray foam insulation r values.

R value measures how well certain building insulation materials can resist heat. Here are some currently available high r building insulation products as well as some specialty very high r insulation materials. The higher the r value the better the thermal performance of the insulation. Cost polyiso is the most expensive of the foam board insulation products however it s the highest r value.

Insulation level are specified by r value. 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. The material is costly and fragile factors that have limited its use in residential construction. 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.

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. Most cost effective insulation typically 25 50 less than other rigid insulations. In fact eps leads the pack when it comes to r value per dollar.

Know exactly how much you need with our project calculators. When determining how much insulation you need don t guesstimate calculate. R value is a measure of insulation s ability to resist heat traveling through it. 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.

Recommended home insulation r values. Read on to find what insulfoam project best fits your roofing or reroofing insulation needs. Polyurethane and polyisocyanurate are both closed cell foams. R value doesn t degrade over time.

They contain low conductivity gases in the cells usually one of the hcfc or cfc gases. See the department of energy s doe ranges for recommended levels of insulation below. Amongst all of the popular types of insulation currently used by the industy spray foam insulation features the highest r value per inch.