Cf 1R Alt Form - Prescriptive Certificate for Residential Alterations

Cf 1R Alt Form PDF Details

The CF-1R-ALT is a Prescriptive Certificate of Compliance form required for residential alterations in California. Property owners and contractors submit this form alongside a building permit application to document that the project meets Title 24 building energy efficiency standards established by the California Energy Commission. The form spans five detailed pages and addresses several categories of construction work on existing single-family and multi-family homes. For building envelope alterations, the CF-1R-ALT specifies prescriptive insulation values for opaque surfaces including walls, floors, and ceilings. It distinguishes between projects that open framed cavities to install new insulation and those involving complete replacement of structural assemblies, applying different requirements based on the climate zone. Fenestration alterations, including window and door replacements, must meet maximum U-factor and Solar Heat Gain Coefficient (SHGC) values set by the energy code. The form provides calculation sections for total fenestration area, allowed glazing area by orientation, and west-facing window limits tied to the dwelling's conditioned floor area. HVAC and water heating system replacements require documentation of minimum equipment efficiency ratings, duct insulation R-values, and refrigerant charge measurements. California requires that duct replacement projects meet specific sealing standards verified through diagnostic testing. Roofing product compliance, slab edge insulation, and thermal mass properties are also addressed in separate sections. The final section covers HERS (Home Energy Rating System) verification, where a certified HERS rater checks duct sealing performance, confirms correct refrigerant charge on new cooling equipment, and verifies that installed energy measures match the prescriptive values listed on the CF-1R-ALT. This third-party verification step is non-negotiable for most residential alteration projects that involve mechanical systems or duct modifications. Related compliance forms include the CF-1R-ALT HVAC form for space conditioning changes and the CF-1R-ALT-02 form for additional building component alterations.