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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 pier foundation that lifts this home above flood waters is visible in this photo taken before the skirt walls were added.
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
These below-grade walls are insulated along the exterior with R-5 of bug-resistant high-density rigid fiberglass insulation installed over damproofing.
This 4-inch layer of rigid foam insulation (R-20) will be sandwiched between two layers of concrete poured on site for a highly insulated foundation wall.
This coastal home was built on a flood-resistant pier foundation using hurricane- and moisture-resistant expanded polystyrene and steel wall panels and hurricane strapping.
This home has a cost-saving shallow frost-protected foundation that uses rigid foam laid vertically at the base of the 16-inch-deep footers to protect the foundation from frost damage.
This home is heated with in-floor hydronic radiant heating tubes that were installed on top of the R-20 rigid foam under-slab insulation.
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.
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
Wrong – When more than one layer of insulation is installed, the seams should be staggered to discourage ground water from reaching the foundation wall.
Z flashing is installed behind the rigid foam and metal lathe that goes behind the stucco siding to protect the transition between the wall sheathing and the exterior foundation insulation.

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