R Factor In Attic Insulation

Click the button to calculate the approximate r value for this job.

R factor in attic insulation.

The laws of physics tell us that heat energy is in constant motion from a hotter. Determining r factor in an attic. Other considerations may include indoor air quality impacts life cycle costs recycled content embodied energy and ease of installation especially if you plan to do the. The table below shows what levels of insulation are cost effective for different climates and.

The higher the r value the better the thermal performance of the insulation. Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces. This calculator is to be used as an estimating tool only. As a benchmark one inch of solid wood has an r value of 1.

R value is a measure of insulation s ability to resist heat traveling through it. Along with knowing the r value of a particular insulation it is also important to calculate the r value of a total system. 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. To choose the best insulation for your home from the many types of insulation on the market you ll need to know where you want or need to install the insulation and what r value you want the installation to achieve.

Input depth of existing blown in insulation in inches. Insulation level are specified by r value. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation.