Residential Roof Insulation Requirements

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.

Residential roof insulation requirements.

Non residential above roof deck this matrix provides the minimum insulation r values required by local and state municipalities. 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. Alternatively you can search for your zone by county through energy gov s here. It s also within the capability of most diyers although not the most pleasant of tasks.

Insulating a roof is perhaps the easiest of all the energy saving home improvements. Mandatory minimum r 22 attic insulation unvented attics must be air sealed at roof deck eaves gables and penetrations. Determine your climate zone. Gables to be insulated as exterior walls.

Climate zones 1 5 and 8 16 wall assemblies must not exceed a maximum u factor of 0 051 climate zones 6 7 wall assemblies must not exceed a maximum u factor of 0 065. R values can be higher for foam insulation and other advanced insulation systems. 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. Existing 3 4 inches of insulation.

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. 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. Insulation climate zone requirements. State applicable energy ashrae zone minimum r value state.

Recommended insulation levels for retrofitting existing wood framed buildings. Minimum insulation r value requirements non residential above roof deck. Add insulation to attic. 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.

Minimum insulation r value requirements by state. Ak alaska 2012 alaska building energy efficiency standard 7 r 35 8 r 35 9 r 40. Refer to the requirements for each building envelope area based on your project s climate zone. See the department of energy s doe ranges for recommended levels of insulation below.