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A damp crawlspace
Any holes through the vapor barrier installed over the basement floor slab are thoroughly sealed as part of the foundation water barrier system.
Basement slab w/ capillary break
Comprehensive water management features include a capillary break (≥ 6-mil polyethylene sheeting) at all crawlspace floors
Concrete slab over polyethylene sheeting as capillary break
Easy access
ICF foundation walls wrap the floor slab in R-22 of insulation while the entire space under the slab is covered with 4.3 inches of closed-cell spray foam.
 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
Pouring the slab
Right – Driveway is installed to slope water away from the house
Right – The drain slopes away from the foundation and terminates at the proper distance
Right – The final grade slopes away from the house
Rigid foam extends under the full slab and lines the inside edges of the foundation walls.
Rigid foam wraps the exterior of the foundation slab.
Standing water around the home
Taping polyethylene sheeting at interior pier footings
The basement slab is wrapped in a blanket of insulation including R-27 of closed-cell spray foam under the slab and R-22 ICF blocks wrapping the slab edges.
The final grade around the house slopes away to prevent water from accumulating at the foundation.
The Habitat affiliate makes its own “ICF” foundation walls with rigid foam held in place with wood spacers.
The home’s slab-on-grade foundation is wrapped in a blanket of rigid foam extending completely under the slab and along the edges.
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 polyethylene sheeting installed to provide a capillary break between the ground and slab
To help keep the monolithic slab-on-grade foundation dry, the site’s surfaces is graded away from the structure, the slab is poured on a bed of gravel, and using a vapor barrier will separate the foundation from the sill plates.
Trapezoid swale design
Two inches (R-10) of rigid foam line the interior of the perimeter footing walls before the post-tensioned slab is poured.
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 final grade does not slope away from the house