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.

Add insulation to attic. It s also within the capability of most diyers although not the most pleasant of tasks. 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. Mineral wool rolls are ubiquitous and cheap meaning a whole roof on a standard home could be insulated to the recommended 270mm with a spend of little more than 200.

R values can be higher for foam insulation and other advanced insulation systems. Insulation climate zone requirements. 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. Recommended insulation levels for retrofitting existing wood framed buildings.

Refer to the requirements for each building envelope area based on your project s climate zone. Alternatively you can search for your zone by county through energy gov s here. State applicable energy ashrae zone minimum r value state. Minimum insulation r value requirements by state.

Cavity fibrous or cellulose insulation can be installed at levels up to r 15 in a 2 inch x 4 inch wall and up to r 21 in a 2 inch x 6 inch wall. See the department of energy s doe ranges for recommended levels of insulation below. 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. Existing 3 4 inches of insulation.

Gables to be insulated as exterior walls. Minimum insulation r value requirements non residential above roof deck. Non residential above roof deck 19727 57th avenue east puyallup wa 98387 web. Insulating a roof is perhaps the easiest of all the energy saving home improvements.

Non residential above roof deck this matrix provides the minimum insulation r values required by local and state municipalities. 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 international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process. Determine your climate zone.