Minimum Attic Insulation Requirements

The insulation s ability to resist heat flow determines its r value.

Minimum attic insulation requirements.

Framed wall insulation must meet or exceed r 13. The average recommended level is 17 inches of r60. As mentioned please check your local codes and requirements before attempting anything on your own or simply call terminix for a free insulation inspection. The mandatory minimum insulation in 2x6 framed walls is r 20.

Browse product options or contact your local insulfoam rep to help you quickly pick the best products to simplify your building envelope needs and fit your project budget all with one supplier. R value is a measure of insulation s ability to resist heat traveling through it. Minimum insulation r value requirements non residential above roof deck. In any case before starting to build a building or insulating an attic it is always better to have the local building department check and validate the.

The greater the number the greater the resistance to heat movement. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. R 38 shall be deemed to satisfy the requirement for r 49 wherever the full height of uncompressed r 38 insulation extends over the wall top plate at the eaves. In zone 7 the average minimum requirement for attic insulation is 14 inches of r49 fill.

The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live. Insulation level are specified by r value. The 2015 irc requires r 49 insulation for ceilings with attic spaces.

Quality insulation installation qii is now a prescriptive requirement. Include qii in the contractor scope as a hers rater will be inspecting the work. The higher the r value the better the thermal performance of the insulation. All the requirements on this list exceed the minimum requirements of the supplementary standard sb 12 of the 2017 ontario building code.

Residential requirements for insulation are divided by the location in the home. Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1. R values identify insulation levels. However there is an exception.

High performance attics prescriptive attic options climate zone hvac duct insulation leakage radiant. Ceiling insulation must be much higher at r 30 and a raised floor must be at. Iecc 2015 requirements by climate zone 3. Insulation requirements in florida.

Recommended home insulation r values. Inspecting your attic insulation.