Residential Cool Roof Requirements

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Roofing product high profile s tile.

Residential cool roof requirements.

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. Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles. The values depend on the climate zone and the slope of the roof per table 150 1 a. A radiant barrier is installed in the attic meeting the radiant barrier requirements of section 152 f 2 of the.

Residential cool roof requirements f building forms and handouts 2019 cbc cool roof req jan 2020 buildings with at least r 38 ceiling insulation. Radiant barrier in the attic. Buildings with a radiant barrier in the attic. Radiant barrier must be installed per manufacturers spec ifications.

Buildings with no ducts in the attic or. Existing ducts in the attic are insulated to r6 and sealed hers verification is required. When installed as roof sheathing it is not per mitted to be installed directly over existing sheathing. Requirements for roofing products.

Commercial cool roof options include bright white membranes and white coatings. Buildings with at least r 38 ceiling insulation. There are different cool roof standards for commercial low slope roofs and residential steep slope roofs. Residential cool roof requirements.

Buildings with a radiant barrier in the attic. Existing sheathing must be removed or a 1 x 4 shall be. When installed as roof sheathing it is not per mitted to be installed directly over existing sheathing. 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.

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 proposed radiant barrier must be installed per manufacturers spec ifications. Residential prescriptive requirements low rise residential buildings climate zone 13 15 10 15 0 20 0 75 75.

Buildings in climate zones 10 11 13 and 14 r 3 or greater roof deck. 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 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. Buildings with at least r 30 ceiling insulation or.

These requirements apply only to low rise residential buildings that are mechanically heated or cooled conditioned space.

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