Flat Roof Insulation Board R Value

High quality rigid foam insulation that is properly installed will greatly improve ventilation eliminate drastic temperature fluctuations inside the home and protect from leaks.

Flat roof insulation board r value.

To convert rsi to r value multiply the rsi by 5 67826. R value of various materials. 2020 insulation cost estimate foam board insulation prices the average cost of flat roof insulation is 0 67 per square foot for 1 inch thick polyiso with 6 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.

For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1 93721. This also means easy hoisting staging and maneuvering around the roof. 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. Install it anywhere from the roof to the foundation.

Note from this chart that the ideal r value differs for each part of your home. Protector hd allows easy efficient scoring cutting and snapping which permits fast tight fabrication and all in a low dust environment. For a 1 inch board equivalent of 6 r value. For a very good introductory overview article on r value see r values over at the website of.

Composite insulation reduces the need for a cover board when applying different membrane roof coverings. Rigid foam insulation also known as insulating boards provide high r values. You can expect to pay about 55 100 sq ft. It is top quality and the most cost effective product for your flat roof.

Rigid insulation is one of the best tools to reduce your energy costs. Provides significantly more thermal insulation r value than wood fiber or gypsum boards. You can even place it under the foundation slab. You should of course see the manufacturer provided technical data sheet for the r value of specific products.

They keep your home at a comfortable temperature without the need to crank your heat. We recommend having at least 20 r value worth of material for optimal energy efficiency. Combining different types of insulation to increase r value. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials.

High r value 2 5 r. Thermapink insulation with a variety of compressive strengths high resistance to water absorption and a stable long term r value of 5 per inch is an excellent insulation layer for use below single ply membrane roofi ng systems.