Wisconsin Attic Insulation Code

Sps 322 38 do not apply to an unheated space such as an attached unheated garage.

Wisconsin attic insulation code.

No energy cost savings for wisconsin resulting from the state updating its commercial and residential building energy codes in accordance with federal law are significant estimated to be on the order of nearly 170 million annually by 2030. Having the correct amount of attic insulation can help you maintain a comfortable temperature throughout your home and help save money on your energy bills plus prevent major issues like ice dams in the winter. The 2015 irc requires r 49 insulation for ceilings with attic spaces. This reduction of insulation shall be limited to 500 square feet of ceiling area.

Sps 322 39 apply to any dwelling with insulation installed whether or not the insulation is required under this code. Achieving greater r values in attics. Make sure your home is properly insulated in all these locations. Stats by the legislative reference bureau.

Sps 322 10 wisconsin administrative code 60 published under s. 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 register date on each page register may 2016 no. Insulation ratings can be improved by adding more layers of insulation.

The ideal attic insulation r value is different than the ideal wall insulation r value. Sps 322 32 2 2 ceilings without attic spaces. Where the design of the roof or ceiling assembly does not allow sufficient space for the required r 49 insulation the minimum required insulation for the roof or ceiling assembly shall be r 30. The table below shows what levels of insulation are cost effective for different climates and locations in the home.

725 is the date the chapter was last published. The higher the r value the better the thermal performance of the insulation. You can mix the type and material of insulation too. R value is a measure of insulation s ability to resist heat traveling through it.

In most areas the international residential code calls for 1 square foot of ventilation per 150 square feet of attic floor space. Pa302 1 ceilings with attic spaces n1102 2 1 r402 2 1. If you think you re among the 90 of us homes that are under insulated 1 performing a simple insulation inspection will help you determine your insulation needs. Updated on the first day of each month.

Sps 322 01 3 b b the vapor retarder requirements under s. If a home s roof has a very steep pitch and thus greater attic volume the suggested amount should be increased by. However there is an exception. As described above the 1 square foot should be divided equally between intake and exhaust.