Highest R Vallue Roof

Read on to find what insulfoam project best fits your roofing or reroofing insulation needs.

Highest r vallue roof. Most cost effective insulation typically 25 50 less than other rigid insulations. The higher the r value the greater the insulation performance. Spray foam insulation r values. For a very good introductory overview article on r value see r values over at the website of.

Insulation level are specified by r value. They contain low conductivity gases in the cells usually one of the hcfc or cfc gases. Amongst all of the popular types of insulation currently used by the industy spray foam insulation features the highest r value per inch. 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. R value of various materials. Here are some currently available high r building insulation products as well as some specialty very high r insulation materials. 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. You should of course see the manufacturer provided technical data sheet for the r value of specific products. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. R value measures how well certain building insulation materials can resist heat.

R value doesn t degrade over time. More r vale per dollar than any other rigid insulation. See the department of energy s doe ranges for recommended levels of insulation below. 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. 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. In fact eps leads the pack when it comes to r value per dollar.

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