Room Additions in Pacoima
Pacoima room additions begin under the floor, checking cripple walls for bracing so any weak base is strengthened before the new room is tied to the house.
A cripple wall is the short stud wall between the foundation and the first floor, and it may stand with no bracing at all. On a Pacoima addition that gets checked from the crawlspace before the quote is written, because a bare cripple wall can fold sideways in an earthquake. Finding one changes the job: it gets braced with plywood first, and the new room is tied to a base that can hold.
Bracing the short walls
Plywood nailed across the studs of a cripple wall turns it into a shear wall. The sheets are fastened with a specific nail size and spacing, and the bottom of the wall is bolted to the concrete. Vent holes are cut or kept so the crawlspace can breathe. Where the new foundation joins the old, the bracing carries through the turn in the foundation so the wall line is unbroken. The plans show every panel and the inspector checks the nailing. Once bracing is in, the floor above rests on a wall that can resist sideways force.
Other surprises under the floor
A crawlspace can also hide a leaking pipe, damp soil or lumber that has been chewed by pests. Each of these changes the schedule in a different way. A leak gets repaired before the floor above is touched, damp soil may need a ground cover and drainage, and damaged lumber is cut out and replaced. We record what was found with photographs and send the list to the engineer. The quote is updated so the changes are visible before work continues.
Room Additions in Pacoima: questions
A check of the existing footing comes first. The engineer looks at its size, depth and the soil bearing on it, then compares it with the weight a second floor adds. If it is adequate, framing proceeds. If not, extra footing or braced walls are drawn into the plans and completed ahead of the upper floor. LADBS reviews that work.
A ledger or lapped joists fasten the new room's floor to the old one, and steel straps cross the joint at marked points. At the roof, framing overlaps and metal flashing covers the valley. We open only the strip needed and rebuild it so the connection is inspected, then hidden.
Start with the cripple walls and the anchor bolts, because those are the parts of an existing foundation most worth reviewing. An unbraced cripple wall or a missing bolt can be corrected while the crawlspace is open for the addition. The work is quoted as a separate item, so you decide whether to include it.
Room Additions in other cities
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Describe the house and what it needs. We look at the structure first and send the quote in writing.