Residential Roofing Requirements

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Residential roofing requirements.

Roof drains and drainage are sufficient to prevent the accumulation of water. The requirements apply to new construction and to retrofits or additions that replace or re coat at least 2 000 ft 2 of roof space for nonresidential buildings and 1 000 ft 2 of roof space for residential buildings or 50 percent or more of the roof surface whichever is larger. Roofing requirements for the design materials construction and quality of roof assemblies for residences are listed in the california residential code chapter 9. When drywall is used as a base for tile or wall panels for tub shower or water closed.

In residential design interior lath and plaster drywall and wood paneling or siding are most commonly used. Fire retardant requirements are maintained. The roof sheathing is solid and structurally sound. All materials used in a roof assembly must be both weather and fire safe as well as compatible with each other.

Existing insulation is not water soaked. 4 106 6 cool roof for reduction of heat island effect. All roofing products must be certified and labeled according to the cool roof rating council crrc to comply with the standards. The ages solar reflectance and thermal emittance requirements will vary depending on the slope of the roof climate zone and the density of the roofing product.

Where building integrated photovoltaics bipv are installed permits issued prior to january 1 2015 for the replacement of an existing roof with asphalt roof shingles or asphalt compostion roll roofing. Roof replacement when the roof area being replaced is equal to or less than 50 percent of the total roof area. These requirements apply to nonresidential high rise residential and low rise residential buildings across california s 16 climate zones. The existing roofing is securely attached to the sheathing.

Attached garage stairways. Roofing materials shall comply with the solar reflectance and thermal emittance requirements of this section.