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Why Flat Roofs on Craftsman Additions & Porches Fail
A genuinely local problem: additions and porches built onto Berkeley’s older homes, roofed with the wrong material for a flat application.
A Pattern We See Across Elmwood, Thousand Oaks, and North Berkeley
A lot of Berkeley’s flat roofs weren’t originally designed as flat roofs. Additions, back porches, and sunrooms built onto Craftsman and brown-shingle homes are frequently low-slope or flat, but were roofed with material meant for a pitched roof — or with a flat-roof material installed without the slope actually needed to drain.
That combination — wrong material, or right material without correct slope — is one of the most common causes of a “small addition roof that always leaks” in this specific city, tied directly to how these homes were built and later expanded.
What to Check Before Repairing
Before we repair a leaking addition roof, we check whether the original roofing choice was even correct for a flat application. Patching a fundamentally wrong material buys limited time; sometimes a proper fix means re-roofing the addition with an actual flat-roof system rather than continuing to patch the original mismatch.
Frequently Asked Questions
How can I tell if my addition has the wrong roofing material?
Composition shingle or other pitched-roof materials on a flat or near-flat surface is a strong indicator. We can confirm during inspection.