Toluca Lake Structural Work Where Decks Meet the House

Deck and balcony ledgers flashed, through-bolted and tied to the house: Toluca Lake structural work after a fire that keeps the rim framing dry.

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Where a deck or balcony bolts to a Toluca Lake house, water goes after the ledger board and the rim joist behind it before anything else. When a fire takes a deck, the rebuild is the moment to stop that. The new ledger gets flashing tucked under the siding and lapped over its top edge, a membrane behind it, and through-bolts set to the engineer's spacing, so rain runs past the joint and drains away.

Ledger, rim joist and flashing

A ledger nailed over siding with no flashing above it lets water sit against the house framing through every storm. Rot then spreads into the rim joist and the floor joists bearing on it, out of sight. In a rebuild we remove the siding where the ledger lands, inspect the rim, replace soft wood and apply a self-adhered membrane before the ledger goes on. Joist hangers and fasteners are rated for treated lumber, and the engineer adds tension ties that connect the deck framing through to the floor inside, so the deck resists pulling away from the wall.

Balcony framing and the city review

A cantilevered balcony, with joists running out from inside the house, is harder to keep dry, since a leak at the door reaches framing indoors. Those joists are wrapped in membrane, the deck surface slopes away from the house, and the door threshold is flashed into the waterproofing. For an address within City of Los Angeles limits, LADBS reviews the deck or balcony framing with the engineer's details and inspects ledger, ties and flashing before decking or stucco hides them. The written scope lists the water details apart from the framing.

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