Recommended R Value For Attic Insulation

Insulation levels are specified by r value.

Recommended r value for attic insulation.

The two distinct types of attic insulation are loose fill material also commonly known as blown in insulation and batting. Typical recommendations for exterior walls are r 13 to r 23 while r 30 r 38 and r 49 are common for ceilings and attic spaces. The amount of insulation recommended for your home will vary depending on a number of factors. See the department of energy s doe ranges for recommended levels of insulation below.

R values of common types of insulation. Recommended home insulation r values. In particularly cold climates you might go up to r 60. Recycled glass or sand that s melted and spun into fibers.

You can achieve better thermal performance in your attic by adding an additional layer of insulation. R value is a measure of insulation s ability to resist heat flow. Achieving greater r values in exterior walls. The recommended r value for attic insulation in ontario is between r 50 and r 60.

R value is a measure of insulation s ability to resist heat traveling through it. You will need a higher r value of insulation if you live in the northeast than if you live in southern california. The higher the r value the better the thermal performance of the insulation. Lighter in weight than cellulose or mineral wool but it settles more than those materials so you ve got to put in a thicker layer to get the protection you need.

The higher the r value the better the thermal performance of the insulation. The higher the r value the better the thermal performance of the insulation. The transfer of heat by contact with solid objects such as the ceiling walls or floor is called conduction see figure 1. Insulation level are specified by r value.

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. 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. Add the right kind of insulation. The table below shows what levels of insulation are cost effective for different climates and.

The r value of the insulation for every inch of thickness depends on the type of insulation. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. Your home s r value score will guide you toward the type of insulation you need.