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A below-grade foundation wall with a damp-proof coating
Basement slab w/ capillary break
Complete water management strategy for a below-grade wall
Easy access
Foil-faced rigid foam and spray foam can be used to insulate a basement on the interior; use good moisture management techniques to keep the basement dry
In cold climates, install slab edge insulation when pouring slab on grade foundations.
Moisture infiltration in below-grade wall
Pouring the slab
Right – Below-grade concrete has been properly sealed against moisture and is now having insulation installed
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 insulated concrete forms that are below-grade have a damp-proof coating to prevent moisture seeping into the foundation
Structural insulated panels offer a continuous layer of thermal protection and draft resistance around the home and come from the factory precut for fast assembly.
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.
There is no polyethylene sheeting installed in the crawlspace
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.
Untreated lumber has been used on a below-grade wall against masonry
Water intrusion
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 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