Room Additions in West Hills
Room additions in West Hills with a water plan from roof to ground, keeping the new room dry while it opens onto the garden with glass and a shaded patio.
Dry walls start with a plan for the water: where roof runoff lands, how it reaches the street or a dry well, and how high the soil sits against the new floor. In West Hills an addition is drawn with those answers first, since a room that stays dry is the one that can safely open to the garden with glass.
Roof water on the way down
A new roof adds a surface for rain to run across, and the gutters and downspouts on it need somewhere to go. Downspouts are carried to splash blocks, buried pipe or a dry well away from the footing. At the line where the new roof meets the old wall, a metal flashing sends water out over the shingles. Gutters on a patio cover are tied to the same system so nothing pools beside the door. A second pipe can take water from the patio cover so its roof does not drop a stream onto the paving.
Keeping the floor above the soil
The finished floor of the addition sits above the surrounding ground, and the ground slopes gently away from the wall. A glass door has a threshold with a pan or sill flashing under it, because that is where water gets in if it will. Outside the door, patio paving is pitched away from the house. These details are small, and they keep the new room dry for as long as the house stands. Soil next to the wall is compacted in layers, which keeps it from settling into a dip that points toward the house.
Room Additions in West Hills: what people ask
Yes, with water handled at the threshold. The opening gets a header sized for the span, a pan flashing under the door sill and a patio pitched away from the glass. Doors are chosen with drainage tracks suited to the way the yard side sheds water.
Ground floor additions put more roof and paving on the lot, so the water plan matters more there. A second story adds less ground coverage but needs the old frame checked by an engineer. Both can open toward the garden, so choose by the space the lot leaves.
Water finds a joint before anything else, so the roof valley, wall opening and floor transition are quoted together on a row of their own. The new walls and finishes sit on other rows, which lets you see what that joint itself requires.
Room Additions in other cities
More of what we build in West Hills
Start your project in West Hills
Send the form with the size of the space and what you want to change.