Fiberboard Roof Insulation R Value

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

Fiberboard roof insulation r value.

To convert the r value of a specific thickness of a material to rsi divide the r value by 5 67826. Fiberboard is not an insulation. For example two inches of extruded polystyrene with an r value of 11 has an rsi of 1. 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.

This also means easy hoisting staging and maneuvering around the roof. 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. 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.

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. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Fiberboard insulating sheathing regular density per inch. Included is our r value guide detailing the suggested amount of insulation dependent upon zone as provided by the u s.

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. Therefore you get practically 0 r value out of it. 30 divide this per inch numberby 2 to obtain the r value for 1 2 medium density fiberboard r 1 22. Additionally attic condensation and leaks will make fiberboard wet.

Huebert fiberboard roof insulation must be dry when it is used on a roof. It has only 1 r value per inch and is always installed in 0 5 inch thickness. Moisture will be trapped inside causing mold growth and further reducing its efficiency. High r value 2 5 r.

30 divide this per inch number by 2 to obtain the r value for 1 2 regular density fiberboard r 1 32. 3 rsi is the metric expression of r value m 2 k w. C factor 1 2. R value is used in the united states.

R value of various materials. To convert rsi to r value multiply the rsi by 5 67826. 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. Here s a handy r value table that covers most types of roof coverings building insulation and a few other materials.