Wood Fiber Insulation R Value

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.

Wood fiber insulation r value.

Moisture resistant wood fiberboard insulation and weather resistive barrier in one for exterior walls under rain screens. Bricks are generally 4 inches thick so it is important to look at r value for 4 inch bricks rather than an r value of brick in general. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. In addition the same substance with a different thickness has a different r value.

The higher the r value the better the thermal performance of the insulation. Flexible thermal insulation from wood. R values per inch for commonly used roof insulation boards range from 2 7 for wood fiber perlite and foamed glass to 5 for extruded polystyrene and 5 6 for isoboards. A three layer stucco system covers this single ply wood fiber insulating board.

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. Recommended home insulation r values. High r value rigid insulation board and roof underlayment in one made from moisture resistant wood fibers. Protector hd allows easy efficient scoring cutting and snapping which permits fast tight fabrication and all in a low dust environment.

Meeting code mandated r values if for example you need an r value of 25 you would need 9 inches for perlite to 4 46 inches of thickness for isoboards. In simple terms r values measure the effectiveness of insulation and a higher number represents more effective insulation. Insulation level are specified by r value. Flexible insulation boards made from natural wood fibres.

High r value 2 5 r. Provides significantly more thermal insulation r value than wood fiber or gypsum boards. Aging effects comments. The closer a climate gets to an extreme in heat or cold the more necessary it becomes to use insulation with a higher r value.

The table below shows what levels of insulation are cost effective for different climates and. R value is a measure of insulation s ability to resist heat traveling through it. High quality single ply construction. Insulation or other building material 9.

Sarking and sheathing boards for roofs 5. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. 1 01 1 41 softwoods 0 71 hardwoods the r value of wood varies by wood density species moisture content.