Fiberboard Roof Insulation R Value

High r value 2 5 r.

Fiberboard roof insulation r value.

In simple terms r values measure the effectiveness of insulation and a higher number represents more effective insulation. Rsi r value système international is the metric equivalent. R value of various materials. This also means easy hoisting staging and maneuvering around the roof.

30 divide this per inch number by 2 to obtain the r value for 1 2 regular density fiberboard r 1 32. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. 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 in your attic to reach r 30 if you live in zones 2 or 3. To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826.

Huebert fiberboard roof insulation must be dry when it is used on a roof. Huebert fiberboard roof insulation makes a good substrate insulation in re roof situations providing the existing roofing or insulation is clear of debris fairly level and moisture free. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1. 3 rsi is the metric expression of r value m 2 k w.

To convert rsi to r value multiply the rsi by 5 67826. For instance if you have a material with an r value of 12 attached to another material with an r value of 3 then both materials combined have an r value of 15. Therefore you get practically 0 r value out of it. Protector hd allows easy efficient scoring cutting and snapping which permits fast tight fabrication and all in a low dust environment.

To minimize the effects of thermal bridging atlas strongly recommends the use of multiple layers when the total desired or specified r value requires an insulation thickness greater than 2 7 thick. C factor 1 2. Fiberboard insulating sheathing regular density per inch. You should of course see the manufacturer provided technical data sheet for the r value of specific products.

Provides significantly more thermal insulation r value than wood fiber or gypsum boards. Additionally attic condensation and leaks will make fiberboard wet. Moisture will be trapped inside causing mold growth and further reducing its efficiency. Also included is the hugely helpful insulation zip code calculator that spells out the suggested amount of r value necessary for the different portions of a structure like foundation interior and.

30 divide this per inch numberby 2 to obtain the r value for 1 2 medium density fiberboard r 1 22. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials. Fiberboard is not an insulation. Included is our r value guide detailing the suggested amount of insulation dependent upon zone as provided by the u s.