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Impervious surfaces like patio slabs, sidewalks, and driveways that are within 10 feet of the home should slope away from the house.
Comprehensive water management features include a capillary break (≥ 6-mil polyethylene sheeting) at all crawlspace floors
Good water management practices like sloping grade away from house, and installing gutters, perimeter drain pipe, a capillary break, and free-draining soils or drainage mat protect the foundation from water saturation.
Patio slabs, porch slabs, walks, and driveways sloped ≥ 0.25 in. per ft. away from home to edge of surface, or 10 ft., whichever is less
Right - Basement slab with a capillary break of either gravel or a drainage mat.
Right – The drain slopes away from the foundation and terminates at the proper distance
The seams of the rigid insulation are not taped and it will not provide a complete capillary break
There is polyethylene sheeting installed to provide a capillary break between the ground and slab
Wrong – Drain pipe has been cut and foundation penetration has not been properly sealed
Wrong – No polyethylene sheeting vapor barrier is installed on the crawlspace floor