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A below-grade foundation wall with a damp-proof coating
A damp crawlspace
Basement slab w/ capillary break
Below-grade wall assembly
Complete water management strategy for a below-grade wall
Comprehensive water management features include a capillary break (≥ 6-mil polyethylene sheeting) at all crawlspace floors
Concrete slab over polyethylene sheeting as capillary break
Drain tile cross-section
Drain tile with a sump pump system
Drain tile with protective cover
Easy access
 Impervious surfaces like patio slabs, sidewalks, and driveways that are within 10 feet of the home should slope away from the house.
Lapped and taped polyethylene sheeting
Moisture infiltration in below-grade wall
Mold growth
Open sump pump
Pouring the slab
Properly installed drain tile discharging to a sump pit
Properly installed drain tile discharging to daylight
Properly sealed sump pump
Right – Below-grade concrete has been properly sealed against moisture and is now having insulation installed
Right – Driveway is installed to slope water away from the house
Right – Polyethylene sheeting vapor barrier is installed and sealed to the crawlspace walls with mastic
Right – The below-grade concrete walls have damp-proof coating
Right – The drain slopes away from the foundation and terminates at the proper distance
Right – The drain tile connects to a sump pump which will pump water away from the foundation
Right – The drain tile is installed along the bottom of the entire foundation footing
Right – The drain tile is wrapped in fabric which will prevent it clogging with debris
Right – The final grade slopes away from the house
Right – The insulated concrete forms that are below-grade have a damp-proof coating to prevent moisture seeping into the foundation
Right – The sump pump has a sealed cover that is mechanically attached
Right – The sump pump has a sealed cover that is mechanically attached
Rigid foam against the foundation
Standing water around the home
Sump pump functions
Taping polyethylene sheeting at interior pier footings
The final grade around the house slopes away to prevent water from accumulating at the foundation.
The seams of the rigid insulation are not taped and it will not provide a complete capillary break
There is 6 mil. polyethylene sheeting installed and sealed in the crawlspace
There is no polyethylene sheeting installed between the ground and the slab
There is no polyethylene sheeting installed in the crawlspace
There is no polyethylene sheeting installed in the crawlspace
There is polyethylene sheeting installed to provide a capillary break between the ground and slab
Trapezoid swale design
Untreated lumber has been used on a below-grade wall against masonry
Water intrusion
Wrong – Drain pipe has been cut and foundation penetration has not been properly sealed
Wrong – Driveway is not sloped away from the house
Wrong – No polyethylene sheeting vapor barrier is installed on the crawlspace floor
Wrong – The below-grade concrete does not have the correct mixture to be impermeable to moisture
Wrong – The below-grade concrete walls do not have any damp-proof coating
Wrong – The drain tile is cut and now does not extend around the entire foundation footing
Wrong – The drain tile is not installed to terminate properly and will not transport water to the exterior
Wrong – The drain tile is not wrapped in fabric and could become clogged with debris
Wrong – The final grade does not slope away from the house
Wrong – The gravel surrounding the drain tile is too large and will let too much debris through
Wrong – The insulated concrete forms at the foundation do not have a damp-proof coating
Wrong – The polyethylene sheeting vapor barrier is not attached to the piers with mechanical fasteners
Wrong – The sump pump does not have a cover
Wrong – The sump pump does not have a cover