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.

A truly green high performance economical roof insulation. When determining how much insulation you need don t guesstimate calculate. In fact eps leads the pack when it comes to r value per dollar. They contain low conductivity gases in the cells usually one of the hcfc or cfc gases.

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. Most cost effective insulation typically 25 50 less than other rigid insulations. 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.

Cost polyiso is the most expensive of the foam board insulation products however it s the highest r value. Spray foam insulation r values. Insulation level are specified by r value. Read on to find what insulfoam project best fits your roofing or reroofing insulation needs.

Know exactly how much you need with our project calculators. 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. 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. You should of course see the manufacturer provided technical data sheet for the r value of specific products. Here are some currently available high r building insulation products as well as some specialty very high r insulation materials. Recommended home insulation r values.

The higher the r value the better the thermal performance of the insulation. See the department of energy s doe ranges for recommended levels of insulation below. The material is costly and fragile factors that have limited its use in residential construction. 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.

For a very good introductory overview article on r value see r values over at the website of. 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. 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.