Residential Roof Insulation Requirements

Alternatively you can search for your zone by county through energy gov s here.

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. Ak alaska 2012 alaska building energy efficiency standard 7 r 35 8 r 35 9 r 40. Insulation climate zone requirements. Add insulation to attic.

Mandatory minimum r 22 attic insulation unvented attics must be air sealed at roof deck eaves gables and penetrations. Non residential above roof deck this matrix provides the minimum insulation r values required by local and state municipalities. R values can be higher for foam insulation and other advanced insulation systems. Minimum insulation r value requirements by state.

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. 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. Recommended insulation levels for retrofitting existing wood framed buildings. 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.

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

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. It s also within the capability of most diyers although not the most pleasant of tasks. Gables to be insulated as exterior walls. 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. 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. State applicable energy ashrae zone minimum r value state. 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.