Foam Board Insulation R Value Chart

Recommended home insulation r values.

Foam board insulation r value chart.

The higher the r value the better the thermal performance of the insulation. Notes to the table above. It s made of environmentally sound closed cell polyisocyanurate foam bonded to a durable white matte non glare aluminum facer and a reflective reinforced aluminum facer. R 3 2 polyisocyanurate rigid foam insulation board r matte plus 3 thermasheath 3 is rigid foam r matte plus 3 thermasheath 3 is rigid foam plastic thermal insulation board.

Xps has an r value of 4 5 to 5 0 per inch of thickness. 1 844 446 7858 my account. Spray foam pink fiberglas vs. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and.

Because rigid foam plastic insulation products are not all aged in accordance with the same standards it is useful to publish comparison r value data. As a benchmark one inch of solid wood has an r value of 1. The common denominator among varieties of insulation is the r value. Rosato asbestos insulation is the most authoritative source on asbestos properties and gives data for the thermal conductivity of asbestos in different forms and with varying temperatures for magnesia asbestos insulation at mean temperatures ranging from 100 f to 400 f the k value thermal.

Insulation level are specified by r value. R value is a measure of insulation s ability to resist heat traveling through it. Notes on the r value k values of different forms of asbestos. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation.

The table below shows what levels of insulation are cost effective for different climates and. Find your zone on the map and then use the above insulation r value chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. Other materials may only have a fifty percent increase in r value when their thickness is doubled. R values vary depending on many factors including the mean temperature at which the test is conducted and the age of the sample at the time of testing.

As a foil faced polyisocyanurate foam insulation enerfoil tm s r value actually more than doubles when it is twice as thick as you can see from the chart above. Our r value guide to rigid insulation includes the doe s recommended insulation by zone chart r value calculator and base building material r values chart. This is the product that i typically use to insulate basement walls. R value is a measurement of thermal resistance and measures the ability of heat to transfer from one side of an object to another.