Downey Decks & Patios That Wrap the House
Downey decks that wrap a house corner: a ledger on each wall, a corner post under two beams, boards turned on a border and flashing lapped inside the turn.
Can the deck turn the corner of the house and run along a second wall? Often it can, and most of the planning on a Downey wrap goes into the corner itself. Two walls mean two ledgers, each bolted to its own rim and flashed so the laps meet at the inside corner without a gap. At the outside corner, a post and a pair of beams carry the turn, and the boards change direction along a border.
Two walls, two ledgers
We cut a small opening in each wall where its ledger would go to confirm a solid rim, and the two walls can differ, since one may run parallel to the floor joists inside. Where a wall cannot take a ledger, that leg of the deck stands on its own beam and posts beside the house. The flashing at the inside corner is a folded or preformed piece, so water running along one ledger cannot slip behind the other. Joists on the two legs run in different directions, and where they meet, a doubled joist or a diagonal beam carries the change.
Turning the boards
Boards that change direction at the corner need blocking under the border, so each board end lands on solid wood. A border also hides small differences in length as the two legs move. If the lot slopes, one leg of a wrap may stand higher than the other, which can mean a step at the corner or posts of two heights. Plans for Downey show both ledgers, the corner framing and the flashing detail, and the reviewer checks the lateral ties on each wall.
Decks & Patios in Downey: questions
Each footing depth comes from the engineer, using the soil and the load on that post. A wrap gathers two beam ends onto the outside corner post, so the engineer checks that footing for both. If part of the Downey yard falls away, the posts on that side reach deeper, and every hole is inspected before the pour.
Two legs of decking mean twice the edge to detail if the Downey parcel shows up on a fire hazard severity map, so we look at that by address before anything else. Unmapped, any deck board that meets the structural rules works. Mapped, both legs need ember-rated boards, and the underside is skirted or kept open along both of them.
Corner framing adds its own line: a second ledger, the corner post and beams, extra blocking and the border. Past that, the frame under the boards grows with height and the surface grows with footprint. The quote lists the corner work apart, so a straight deck on one wall can be priced next to the wrap.
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