A permit is required when more than twenty-five percent (25%) of the roof covering, in any plane of any building or structure is replaced in any twelve (12) month period. The new roof covering shall be made to conform to the requirements of the California Building Code for new construction and City of San Ramon requirements.
New Construction. Fire-retardant roof covering as indicated in Section 1505.1.1 or 1505.1.2 or 1505.1.3, including pressure treated wood shake or shingle roof assemblies when approved by the Building Official, shall be required for all new construction. Roofing with less than one-fourth inch (1/4") slope per foot shall have deputy inspection during application of all roofing materials.
Roofing in the Hillside Brush Area (the area on the east side of Alcosta Boulevard and east of Alcosta Boulevard to Stagecoach Road and on the west side of San Ramon Valley Boulevard and west of San Ramon Valley Boulevard), as defined by the Building Official and San Ramon Valley Fire Protection Districts shall be constructed as required in UBC Section 1503.1 and/or 1503.2.
1505.1.1 Roof Coverings within Very High Fire Hazard Severity Zones. All new structures, and every existing structure when 50 percent or more of the total roof area is reroofed within a one-year period, the entire roof covering of every new structue, and any roof covering applied in the alteration, repair or replacement of the roof of any exisitng structure, shall be a fire-retardant roof covering that is at least Class A.
1505.1.2 Roof Coverings within State Responsibility Areas. Every new structure, and every existing structure when 50 percent or more of the total roof area is reroofed within a one-year period, the entire roof covering of every new structue, and any roof covering applied in the alteration, repair or replacement of the roof of any exisitng structure, shall be a fire-retardant roof covering that is at least Class B.
1505.1.3 Roof Coverings in All Other Areas. Every new structure, and every existing structure when 50 percent or more of the total roof area is reroofed within a one-year period, the entire roof covering of every new structue, and any roof covering applied in the alteration, repair or replacement of the roof of any exisitng structure, shall be a fire-retardant roof covering that is at least Class C.
ROOFING REQUIREMENT DETAILS
Enclosed attics and enclosed rafter spaces formed where ceilings are applied directly to the underside of roof framing members shall have cross ventilation for each separate space by ventilating openings protected against the entrance of rain and snow. Blocking and bridging shall be arranged so as not to interfere with the movement of air. An airspace of not less then 1 inch (25mm) shall be provided between the insulation and the roof sheathing. The net free ventilating area shall not be less than 1/150th of the area of the space ventilated. (2013 CBC 1203.2)
The 2013 California Building Code is scheduled for enforcement beginning January 1, 2014. It uses the 2012 International Residential Code as its base document. Section 801.3 of the International Residential Code regulates drainage for “one and two family” residential buildings and is a much more comprehensive section than the City of San Ramon’s two separate ordinances adopted in the past.
San Ramon will allow the use of the 2013 California Code provisions. Though not yet effective, it has been adopted by the State of California Building Standards Commission. The 2013 State Codes become effective on January 1, 2014. The drainage section provision, will be allowed as an “Alternate Method of Construction” in accordance with section 104.11 of the administrative provisions of the 2013 California Building Code and the City of San Ramon Administrative provisions.
Previous ordinances have mandated installation of roof gutters and drains to the street for all residential properties and another ordinance requires that all roof drainage be deposited on the property whenever possible, essentially to whatever extent the yard could absorb the rain runoff. The intent of the provisions it to reduce the runoff water to the storm and bay but whenever water must be removed from the property it must be channeled to the street in an approved manner.
The primary reason for having roof gutters and drainage from a Building Code standpoint is to collect the water, move it away from the building thereby preventing damage to the structure by keeping the water away from the foundation. The 2013 Code will resolve that issue and remove the conflict between the two City ordinances. For those properties where the yard is inadequate to absorb the rain water the new provisions would require runoff to drain through an approved drainage system. The location of the water deposit must be an “approved” location.
References: 2012 IRCR801.3 Roof Drainage
“In areas where expansive or collapsible soils are known to exist, all dwellings shall have a controlled method of water disposal from roofs that will collect and discharge roof drainage to the ground surface at least 5 feet (1524 mm) from foundation walls or to an approved drainage system.”
City of San Ramon Municipal Code:
INSPECTION REQUIRED AFTER TEAR-OFF COMPLETEDInclement Weather Conditions policy is in place for the time period of October 15 to April 15. Please refer to section below.
INSPECTION REQUIRED AFTER COMPLETELY NAILING OFF PLYWOOD
INSPECTION REQUIRED AS INSTALLATION OF RE-ROOFING COMMENCES
FINAL INSPECTION OF RE-ROOFING PROCEDURE IS REQUIRED
Re-Roofing in Inclement Weather Conditions - click to view instructions
To assist and assure that the roofing contractor is able to maintain integrity of a re-roof project preformed between the time period of October 15 through April 15 of each calendar year, the procedure for inspection of the nailing of the roof sheathing will be as follows: