Flat Roof Insulation Board R Value

Provides significantly more thermal insulation r value than wood fiber or gypsum boards.

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. To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. R value of various materials. This also means easy hoisting staging and maneuvering around the roof.

You can expect to pay about 55 100 sq ft. High r value 2 5 r. Protector hd allows easy efficient scoring cutting and snapping which permits fast tight fabrication and all in a low dust environment. We recommend having at least 20 r value worth of material for optimal energy efficiency.

Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. Rigid insulation is one of the best tools to reduce your energy costs. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1 93721. 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.

To convert rsi to r value multiply the rsi by 5 67826. For a very good introductory overview article on r value see r values over at the website of. Note from this chart that the ideal r value differs for each part of your home. For example if you have a type of insulation that has an r value of r 5 per inch of thickness you will need a depth of 6 inches of this insulation installed your attic to reach r 30 if you live in zones 2 or 3.

It is top quality and the most cost effective product for your flat roof. You should of course see the manufacturer provided technical data sheet for the r value of specific products. Rigid foam insulation also known as insulating boards provide high r values. 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.

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. Composite insulation reduces the need for a cover board when applying different membrane roof coverings. Composite insulation works in flat and low sloped roofs with a variety of roof coverings. Combining different types of insulation to increase r value.

For a 1 inch board equivalent of 6 r value. You can even place it under the foundation slab.