Chapter 5 of 613% of exam

Exterior Remodeling

CSLB weights Exterior Remodeling at about 13% of the B-2 exam: roof repairs, remodeling exterior walls, and doors and windows. This page is a short survey; the PrepPass B-2 Residential Remodeling study guide teaches the section with worked examples and a full practice exam at CSLB's weights.

Roof repairs

Asphalt shingles need at least 2:12; replacement removes old layers to the deck; flashing and ventilation follow the CRC.

Slope
2:12 minimum; double underlayment from 2:12 to 4:12.
2025 CRC R905.2.2
Replacement
Remove existing layers down to the roof deck.
2025 CRC R908.3
Fall protection
6 feet on slopes to 7:12; any height above 7:12.
8 CCR 1731

Exterior walls

A continuous water-resistive barrier and shingle-lapped flashing keep water out.

Barrier
At least one layer behind the cladding, continuous to the top of the wall.
2025 CRC R703.2
Vinyl siding
6 inches from the ground and 1/2 inch from adjacent surfaces.
2025 CRC R703.3.1
Stucco
Three coats over metal lath; 48 hours moist between coats.
2025 CRC R703.7

Doors and windows

Install per the maker's instructions, flash every opening and keep escape openings and safety glazing compliant.

Escape opening
5.7 square feet net clear (5 at grade floor), 24 by 20 inches, sill 44 inches maximum.
2025 CRC R319.2
Safety glazing
Doors, glazing within 24 inches of a door, large low panes, wet areas and stairs.
2025 CRC R324.4
Egress door
32 inches clear width, 78 inches clear height.
2025 CRC R318.2

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