Spring 1996
Common Problems:
- Grade slopes toward building.
- Inadequate waterproof membrane.
- No protection board.
- No extension of waterproof membrane above grade or over
footing.
- No foundation drain.
- No gravel or filter fabric around drain.
- No waterproof membrane under slab.
Potential Damage:
- Efflorescence and water stains on walls
- Ponding against building and on basement floors.
- Moisture migration though slabs.
The Five Basic Elements For Waterproofing
Below Grade Walls:
- Waterproof membrane
- Protection board
- Gravel Fill
- Foundation Drain
- Filter Fabric
Recommended Solutions:
- slope the finish grade away from the building,
- install a membrane under the concrete building slab,
- provide a cant strip to transition the waterproof membrane
at any 90 degree angle,
- install ultraviolet protection for the above-grade waterproofing.
Information provided by Building Analysts, a full-service architectural and engineering firm with many years of experience in construction litigation. Their services include: architectural and structural investigations, repair recommendations, preparation of exhibits and expert testimony. Contact Building Analysts at (619) 234-8153.
