ADU Construction in La Verne, Starting With the Bathroom
La Verne ADUs with a curbless shower over a recessed slab, drains placed before the pour and a strapped water heater that stays put in shaking.
The bathroom in a La Verne ADU has to handle a shower every day without letting water into the frame or the slab. We recess the slab under the shower so the floor can slope to the drain with no curb to step over, and the waterproofing membrane wraps up the walls before any tile is set. Solid blocking between the studs goes in during framing, ready for grab bars on the day someone needs them.
Drains through the slab
Every fixture drain in the bathroom runs under the slab before concrete is placed. The plumber sets the pipe at a steady fall toward the sewer, sleeves it where it passes a footing, and the inspector sees it under a water test before the pour. Locating the toilet, shower and sink along one wall keeps those runs short and leaves the rest of the slab uncut. That helps the structure too, because each trench cut later weakens the slab, and a slab with fewer interruptions spreads its load more evenly.
Strapping and the mechanical closet
A tank water heater beside the bathroom is strapped to the wall framing in its upper and lower thirds, as the California plumbing code requires, so shaking cannot tip it and break the water or gas connection. A heat pump water heater needs the same straps plus open air around it to work well. Where gas serves the unit, flexible connectors at each appliance give the line some movement. Those small details keep a moderate quake from turning into a flood or a leak inside a finished room.
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Reinforced concrete carries a La Verne unit: a slab with footings around its edge, formed with a shallow recess where the shower goes. The soils report drives the footing size. Anchor bolts along every wall and hold-downs at the braced panels tie the frame to that concrete, so the bathroom walls move with the slab.
Sometimes it can, if the footing tests well. We measure its depth and look for steel. A converted garage still needs a trench through the slab for bathroom drains, and the concrete around that cut is patched with doweled steel. An old footing that falls short is replaced in sections beneath each bracing wall.
The package reaches any La Verne unit that stays on one floor with 500 square feet or less inside it, detached, attached or converted. La Verne sets lean on the floor plan, which fixes the bathroom, its slab recess and the drain runs in place before the structure is drawn around them. We quote larger and two-story plans on their own, after seeing the site.
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Describe the house and what it needs. We look at the structure first and send the quote in writing.