Walnut ADU Construction With a Clean, Dry Roof Edge
Walnut ADU construction with a hidden box gutter, a roof that carries rainwater clear of the glass door and a shaded private patio. Palmcrest Contractors.
Hidden gutters suit the clean roof edge we like on a Walnut ADU. Built into the fascia, a lined box gutter runs along the low side of the roof, catches the runoff and sends it down one leader at a corner, away from the glass door. From there a buried pipe leads the water off to a dry well or a planted basin in the yard, so neither the patio nor the main house foundation takes it.
Keeping water off the patio
The roof slopes away from the patio side, so the glass wall sits under the high edge and stays dry. A short overhang there shades the door without collecting much water. Box gutters need a liner that laps correctly and an overflow scupper in case the leader clogs, and we size both for the roof area. Gutter seams are soldered or sealed. On a suburban Walnut lot the basin or dry well goes where the yard can absorb water without sending it toward a neighbor.
Placing the unit and its patio
We place the unit with its glass looking onto its own patio and a plain wall turned to the main house. Trees, the sewer lateral and the electrical panel all get mapped on the first visit. If the yard falls toward the back, the footings and the drain pipe follow that fall. A pergola or a cover tied to the unit adds shade over the door. The plans package covers the drawings, and construction is quoted separately once we have walked the lot.
ADU Construction in Walnut: what people ask
Toward the rear of a Walnut lot, with the glass turned to open yard and the leader draining away from both homes. The back windows of the main house, any large trees and the sewer route all shift the final spot, which we set on the survey before drawing begins.
Walnut units built on one level and no larger than 500 square feet are covered. The roof plan with its gutter details and the site plan with the drainage route are the sheets we develop furthest for this kind of lot. Larger or two-story designs sit outside the package.
Yes, and the roof is drawn for it: the glass door sits under the high edge, the patio stays dry, and a pergola or solid cover adds shade. On a Walnut lot, shrubs or a slatted fence set between the two homes gives the unit an outdoor room of its own.
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