Minimum Attic Insulation Requirements

Recommended home insulation r values.

Minimum attic insulation requirements.

For block walls interior insulation must meet or exceed r 7 8 and exterior insulation must be r 6. Include qii in the contractor scope as a hers rater will be inspecting the work. R values identify insulation levels. The average recommended level is 17 inches of r60.

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. The insulation s ability to resist heat flow determines its r value. High performance attics prescriptive attic options climate zone hvac duct insulation leakage radiant. Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1.

All the requirements on this list exceed the minimum requirements of the supplementary standard sb 12 of the 2017 ontario building code. Inspecting your attic insulation. Framed wall insulation must meet or exceed r 13. Insulation level are specified by r value.

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. The 2015 irc requires r 49 insulation for ceilings with attic spaces. 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.

Minimum insulation r value requirements non residential above roof deck. Residential requirements for insulation are divided by the location in the home. The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. 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.

As mentioned please check your local codes and requirements before attempting anything on your own or simply call terminix for a free insulation inspection. 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. The mandatory minimum insulation in 2x6 framed walls is r 20. R 80 with batt or blown insulation.

Insulation requirements in florida. In zone 7 the average minimum requirement for attic insulation is 14 inches of r49 fill. First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation. The greater the number the greater the resistance to heat movement.

However there is an exception. The higher the r value the better the thermal performance of the insulation.