Room Additions in Encino With a Dry Slab
Encino room additions on slabs with a vapor retarder and gravel break, and grading that sends water away from the new walls. ADU weighed too.
Ground moisture wicking up through a new slab is the water problem that hides longest on an Encino addition, showing up as cupped flooring or musty carpet well after move-in. The fix goes in before the pour: a layer of gravel as a capillary break, a heavy vapor retarder lapped and taped at every seam, and the concrete placed over it. Outside, the soil is graded to fall away from the new wall, so runoff cannot pool against the footing.
Grading and drainage around the room
Finished grade has to drop 6 inches within the first 10 feet out from the foundation, and the bottom edge of the stucco or siding stays clear of the soil so the wall can drain. A weep screed set above the soil line lets water inside the stucco escape. Downspouts from the new roof discharge onto splash blocks or into pipes that carry water to a safe outlet. Where the ground falls toward the house, a shallow swale or a drain line may be added to turn surface water aside before it reaches the addition.
LADBS and the ADU question
LADBS reviews Encino additions for zoning, structure and energy compliance, and the site plan shows how water leaves the lot. An attached ADU would go through the same office under state ADU law, with its own kitchen, bath and entrance with a rated fire separation at the shared wall. Both need the same slab and grading care. The real difference is use, more room for the house or a separate dwelling, and we compare the two on your lot and price each when either fits.
Room Additions in Encino: common questions
Let the intended occupant decide it. A bigger family room, an extra bedroom or a home gym all fit as an addition to the main house. Someone who should have a separate kitchen and entrance points to an attached ADU. Encino lots go through LADBS under different standards for each, and both get checked against your parcel.
Expect an LADBS building permit. If the job involves a retaining wall or grading beyond minor shaping, an added review may apply. The drawings we prepare for an Encino addition include the drainage and slab details, and we file them and answer corrections.
A second story is workable when the footings and walls already in place can bear the added load and zoning allows the height. An engineer specifies any added footings, posts or shear walls. Upstairs, the water plan shifts to the roof edge, with gutters and downspouts sized for the larger roof and flashing where the upper walls meet the lower roof.
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