Marina del Rey Room Additions Built to Drain
Marina del Rey room additions built to shed and drain water: lapped barrier, window flashing, a drainage gap behind siding and a protected base for the walls.
Siding sheds most of the water that reaches a Marina del Rey wall, and the layers behind it handle the rest. A water-resistive barrier, flashing at every opening and a drainage gap give whatever gets past the siding a way back out. Where damp conditions linger near the water, a wall also has to dry as well as shed, and the addition is detailed with both jobs in mind.
The layers behind the siding
Sheets of water-resistive barrier are lapped like shingles, upper over lower, with seams taped. Each window gets a flashing pan at the sill and tape up the sides, which keeps leaks away from the framing. Furring strips behind the siding leave a narrow gap, so air moves and the wall dries from the outside. Siding boards are primed on all faces, including cut ends, and the sealant joints are kept to the few places where they are truly needed, since sealant is the first layer to age out.
Where the wall meets the foundation
The bottom plate of the new wall is pressure-treated wood set on a gasket over the concrete, which breaks the path for moisture rising from below. Under the soil line, the new footing is damp-proofed. If the soil on the lot holds water, a perimeter drain carries it away to an approved outlet. The county building department reviews these details with the rest of the drawings, and if the parcel sits inside the coastal zone, a separate review may apply on top of the building permit.
Room Additions in Marina del Rey: what families ask
Start with the zoning the county applies to your lot: setbacks, coverage, floor area and height. A parcel inside the coastal zone may also be held to added limits on bulk and height. Both sets are read before drawing, and what survives them is the room we design.
Yes. A temporary wall with a sealed edge keeps the work away from the living rooms. Roof and wall layers are closed in early, so the new shell is protected before its interior opens to the house. Shutoffs of water and power are planned with you beforehand.
Matching comes from repeating what the house shows: roof pitch, eave depth, wall texture, color and window proportions. Behind the finish, the new wall is built to shed and drain water, which does not change the look but keeps the surface sound. Indoors, floors meet at one height.
Room Additions in other cities
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