Flat Roof Repair
in Sherman Oaks, CA

Sherman Oaks has more low-slope roof than its ranch-house streets suggest. Mid-century post-and-beam homes carry whole roofs at a pitch too low for shingle; garage conversions, patio enclosures and room additions on the flats north of Ventura carry torch-down sections tied into the main roof; and the storefronts, offices and apartment buildings along Ventura Boulevard and Sepulveda are mostly flat-roofed.

Those roofs leak in the same three places: a seam that has opened, a scupper or drain that has clogged until the roof ponds, and the transition where the flat section meets a pitched roof, a wall or a parapet. The repair goes where the failure is: the seam rewelded, the scupper cleared or enlarged, the transition rebuilt with the membrane carried up under the shingle and counter-flashed, not sealed with another bead of caulk.

When the membrane is dry and adhered but tired, a silicone coating restores it for $2–$4 per sq ft, a fraction of the $4.50–$9 per sq ft a replacement costs. When it is wet underneath, blistered across the field or failing at every seam, it gets replaced with two-ply torch-down or heat-welded white TPO, with new edge metal and scuppers, and tapered insulation where water has been standing.

Replacements are permitted through LADBS at the Van Nuys Development Services Center, about ten minutes up Van Nuys Boulevard. A low-slope replacement or re-coating of more than half the roof has to meet the cool-roof numbers for our climate zone; white TPO meets them out of the box, and a coating is chosen by its CRRC-rated aged values.

Permits go to LADBS at the Van Nuys Development Services Center, 6262 Van Nuys Blvd, about ten minutes up Van Nuys Boulevard from our base. LADBS issues most shingle re-roofs as an express permit (no plan check) when the covering is Class A or B and weighs under 6 lb/sq ft over solid sheathing; tile and other heavier coverings go through the standard permit process.

LADBS lists the application of an approved coating to an existing roof as an express-permit item (no plan check). Under the 2025 California Energy Code the cool-roof rules for re-roofing cover replacements, recovering and re-coating: when more than half of a single-family roof is re-coated, a low-slope roof in Climate Zones 4 and 6–15 needs an aged solar reflectance of 0.63 and thermal emittance of 0.75 (or SRI 75), and nonresidential low-slope roofs meet the same numbers when more than 50% of the roof or 2,000 sq ft, whichever is less, is altered.