Patient Details
A structural waterproofing and drainage project was completed in Los Angeles. The scope of work involved the installation of approximately 52 linear feet of engineered subterranean waterproofing and subdrain systems reaching a maximum height of about 11 feet. To prepare the site, an existing 30-inch wide concrete slab was sawcut and hauled away , and temporary timber shoring was installed during the excavation along the perimeter foundation wall.
The existing defective waterproofing system was removed, and the wall was thoroughly cleaned and dried. The team then installed two thick layers of elastomeric waterproofing membrane, followed by a third layer of sheet drains. To properly manage water, a perforated subdrain was set into a 12-inch by 12-inch gravel pocket wrapped with fabric cloth and routed to daylight. After backfilling and compacting the trenches in 2-foot lifts , the slab was restored using #4 rebar epoxy dowels and minimum 2,500 PSI concrete. The new slab was given a sidewalk grade finish with a 2% slope directed away from the perimeter foundation. Additionally, the northeasterly side yard steps were restored as part of the project.
