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Why Baldwin Park Decks Fail in Summer, Not Winter

The failure pattern in Baldwin Park follows the central San Gabriel Valley climate rather than the storms. Long stretches of heat expand and contract a deck surface daily, working cracks open at the edges, around posts and where the deck meets a wall. Nothing looks wrong through summer. Then the first real rain goes straight into every gap the heat spent months opening.

That is why we spend the time on terminations and transitions rather than rolling a fresh coat over a tired surface. Owners hold 10,437 of the occupied units here, 58.4 percent, with 7,445 rented, so much of this is single family work: rear decks, entry stairs and balconies over living space.

Terminations is a vague word, so here is what it means on a job. The pan under a door threshold. The metal at the deck edge and whether it still has a drip on it. The base of every post. The flange around the drain. A surface that fails almost always fails where it ends.

The rental side of the city is not high rise. It is duplexes, four-unit buildings and small courts with an exterior stair up the side and a landing serving two doors. Those stairs take weather from above and traffic from below at once, and when a landing goes soft the tread nose and the stringer connection have usually gone with it.

Tear-off turns up the same list every time: plywood delaminating at the seams, a ledger wet long enough to lose its fasteners, mesh rusted through under magnesite, and three previous repairs that never bonded to each other.

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