Room Additions in Redondo Beach, Flashed and Drained
Rain on a Redondo Beach room addition, traced from valley metal to gutter to buried line, with sill pans, corrosion-resistant flashing and a vapor barrier.
Rain that lands on a new Redondo Beach roof follows a planned path: into valley metal where the old and new roofs meet, along gutters sized for the added area, down the leaders and through a buried line to an approved outlet. Every turn in that path is drawn on the plans. Where the new walls meet the old, flashing laps over the layer beneath it so water stays on the outside face.
Walls and windows
Each new window sits on a sloped sill pan, with flashing tape lapped at the jambs and head so every layer sheds over the one under it. Where the house is stucco, the old plaster is cut back and new building paper is woven behind it, so water running down the face stays out of the wall. Near the coast, metal flashing and fasteners in stainless or heavy galvanized finish hold up against corrosion from salt in the air. Kickout flashing at the bottom of each roof-to-wall joint turns runoff into the gutter.
At the ground
The new slab sits above the surrounding soil, and the grade falls away from it on every side. A vapor barrier under the slab keeps ground moisture from wicking up into the flooring. Weep screed at the base of a stucco wall stays clear of paving and planting so moisture behind the finish can escape. For a raised floor, the crawlspace gets vents and a clear path for any water that finds its way in. Gutters and cleanouts stay reachable, since a clogged leader sends water back toward the wall it was meant to protect.
Room Additions in Redondo Beach: common questions
Picture who uses the room each day. If it serves the people already living in the house and relies on its kitchen, build an addition. A space that needs a separate entrance, a kitchen and a bath falls under state ADU law as an attached unit, which brings different size and setback limits. Both get drawn against the Redondo Beach lot for comparison.
Zoning, structure and energy calculations are all read by City of Redondo Beach plan checkers, and inspections by the city follow every phase of the work. Should the parcel fall within the state coastal zone, a coastal permit or exemption is handled alongside. We check the parcel record, assemble the submission and answer each comment.
Often it can, provided an engineer finds the existing footings and walls able to carry the added floor and the height limit leaves room. A second story also means more roof, more flashing at the joints and longer downspout runs, all drawn on the plans. A ground-floor option is priced alongside so the two can be compared.
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