The values depend on the climate zone and the slope of the roof per table 150 1 a.
Residential cool roof requirements.
Buildings with a radiant barrier in the attic.
Standard or dark roofs can reach temperatures of 150 f or more in the summer sun.
Existing sheathing must be removed or a 1 x 4 shall be.
Buildings with at least r 38 ceiling insulation.
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.
Residential cool roof requirements f building forms and handouts 2019 cbc cool roof req jan 2020 buildings with at least r 38 ceiling insulation.
Residential roofing options include asphalt shingles metal clay tiles and concrete tiles.
Radiant barrier must be installed per manufacturers spec ifications.
Roofing product high profile s tile.
Requirements for roofing products.
Buildings in climate zones 10 11 13 and 14 r 3 or greater roof deck.
Cool roofs can be made of a highly reflective type of paint a sheet covering or highly reflective tiles or shingles.
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 a radiant barrier in the attic.
When installed as roof sheathing it is not per mitted to be installed directly over existing sheathing.
There are different cool roof standards for commercial low slope roofs and residential steep slope roofs.
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 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.
Buildings with no ducts in the attic or.
Buildings with at least r 30 ceiling insulation or.
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.
Existing proposed radiant barrier must be installed per manufacturers spec ifications.
Radiant barrier in the attic.
These requirements apply only to low rise residential buildings that are mechanically heated or cooled conditioned space.
Residential cool roof requirements.
Radiant barrier in the attic.
Commercial cool roof options include bright white membranes and white coatings.
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.
