Residential Cool Roof Requirements

A cool roof under the same conditions could stay more than 50 f cooler and save energy and money by using less air conditioning.

Residential cool roof requirements.

A radiant barrier is installed in the attic meeting the radiant barrier requirements of section 152 f 2 of the. Requirements for roofing products. Residential cool roof requirements roofing product has a profile ratio rise to width of 1 to 5 for 50 percent or greater of the width of the roofing product high profile s tile. Residential cool roof requirements f building forms and handouts 2019 cbc cool roof req jan 2020 buildings with at least r 38 ceiling insulation.

Buildings with no ducts in the attic or. When installed as roof sheathing it is not per mitted to be installed directly over existing sheathing. Buildings with at least r 38 ceiling insulation. When installed as roof sheathing it is not per mitted to be installed directly over existing sheathing.

Existing sheathing must be removed or a 1 x 4 shall be. Residential cool roof requirements. The values depend on the climate zone and the slope of the roof per table 150 1 a. There are different cool roof standards for commercial low slope roofs and residential steep slope roofs.

Buildings with a radiant barrier in the attic. Residential roofing options include asphalt shingles metal clay tiles and concrete tiles. Commercial cool roof options include bright white membranes and white coatings. Existing ducts in the attic are insulated to r6 and sealed hers verification is required.

Residential prescriptive requirements low rise residential buildings climate zone 13 15 10 15 0 20 0 75 75. Radiant barrier in the attic. Standard or dark roofs can reach temperatures of 150 f or more in the summer sun. In california all new or replacement low slope roofs are required by the building energy efficiency standards title 24 to be cool roofs as are steep slope roofs in several california climate zones.

Residential cool roof requirements under the provisions of the 2019 california energy code steep sloped 2 12 slope and greater re roof projects are required to comply with cool roof requirements when more than 50 of the roof is replaced in climate zone 11. These requirements apply only to low rise residential buildings that are mechanically heated or cooled conditioned space. Buildings with a radiant barrier in the attic. Roofing product has a profile ratio rise to width of 1 to 5 for 50 percent or greater of the width of the roofing product high profile s tile.

Existing sheathing must be removed or a 1 x 4 shall be. Existing proposed radiant barrier must be installed per manufacturers spec ifications. Buildings with at least r 30 ceiling insulation or. Radiant barrier in the attic.

Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles.