Decks & Patios in West Hills
Decks and patio doors in West Hills with a sloped sill pan, flashed ledger and drained ground underneath, so rain leaves the wall and the boards dry.
A sloped sill pan tucked under the patio door catches whatever water gets past the threshold where a West Hills deck meets the house. Rain driven against the glass runs down into that pan and back outside, so the subfloor stays dry even with the deck sitting close to the door. Ledger flashing and a gapped deck surface then carry what lands outside away from the wall.
From the door to the ledger
The pan is formed from metal or a flexible membrane with upturned back and side edges, and it laps over the house wrap below. The deck ledger sits under that, with its own cap flashing tucked behind the wrap and spacers holding the board off the wall so water drips through the gap. Joist tops carry a tape that seals around each screw. With these layers lapped in order, water reaching the wall at any height has a path down and out, and the framing behind it stays dry.
Under the boards
Gaps between deck boards pass rain to the ground, so the soil beneath has to send it somewhere useful. A shallow swale or a layer of gravel slopes the area under the deck away from the foundation. Post bases stand on piers that rise above the ground line, keeping the wood off wet soil. Where the lot slopes toward the house, an intercepting drain along the uphill side catches runoff before it reaches the deck. Downspouts are carried in solid pipe past the deck footprint to a safe outlet.
Decks & Patios in West Hills: what people ask
With a proper sill pan and threshold, the deck can come within a small step of the floor. The surface slopes slightly away from the house, and the gaps between boards let water fall through so none collects at the door. The final height is set once the threshold detail is chosen.
Gutter-edged solid roofing gives full shade and keeps the deck dry, sending the water to a downspout you can place. Louvers close against rain and open for light. Slatted pergolas let rain through, which is fine over a gapped deck that drains anyway.
For an attached cover, a raised deck or a new door opening, plan on one. LADBS reviews West Hills projects and inspects the footings, the ledger flashing and the framing. Drainage details show on our drawings, and the whole filing is handled for you.
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