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What r value do i need.
Cellulose insulation r value floor. Made from recycled paper nu wool premium cellulose insulation has superior thermal and air infiltration properties creates quiet and draft free buildings and saves on energy bills. 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. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system.
Nu wool premium cellulose insulation is a superior product designed for use in walls attics and floors of new and existing residential and commercial structures. The weak point in the assembly such as flanking through windows and doors will diminish the value of the reduction in sound power. R values and their metric equivalent rsi values are a way of labelling the effectiveness of insulating materials. 1 in field testing on identical 2x4 exterior wall types greenfiber r 13 stabilized spray applied insulation outperforms r 15 unfaced fiberglass batts by 4 nic raring points which equates to a 60 reduction in sound power.
Input depth of existing blown in insulation in inches. The overall r value of a wall or ceiling will be somewhat different from the r value of the insulation itself because heat flows more readily through studs joists and other building materials in a phenomenon known as thermal bridging. The table below shows what levels of insulation are cost effective for different climates and. In comparison an inch of blown fiberglass insulation has an r value of 3 1 3 4 and an inch of blown cellulose in an attic has an r value of 3 2 3 7.
A look at cellulose insulation r values. As a benchmark one inch of solid wood has an r value of 1. 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 insulation that is compressed will not provide its full rated r value.
R value is a measure of insulation s ability to resist heat traveling through it. The r value for cellulose insulation in an attic depends on several factors including the size shape and construction of your attic typical weather conditions where you live. Click the button to calculate the approximate r value for this job. Note from this.
The higher the r value the better the thermal performance of the insulation. Insulation level are specified by r value. This calculator is to be used as an estimating tool only.
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