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Because the above-grade potions of the wall lack exterior insulation, condensation and even ice form during cold winter conditions
Buoyancy force on dry floodproofed homes with deep basements leads to possible foundation damage
Exterior fiberglass insulation on this new home was (incorrectly) cut to terminate below-grade after backfill, which will expose the above-grade portions of the foundation wall to cold temperatures
Exterior XPS basement insulation is correctly installed to completely cover the foundation wall
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
Good water management practices like sloping grade away from house, and installing gutters, perimeter drain pipe, a capillary break, and free-draining soils or drainage mat protect the foundation from water saturation.
Right - Basement slab with a capillary break of either gravel or a drainage mat.
Right - Below-grade concrete has been properly sealed against moisture and is now having insulation installed.
Right - Permeable rigid mineral wool insulation and appropriate water-management flashing details are integrated with new rigid foam siding to keep water away from the sill beam above the foundation wall
Right – Polyethylene sheeting vapor barrier is installed and sealed to the crawlspace walls with mastic
Right – The insulated concrete forms that are below-grade have a damp-proof coating to prevent moisture seeping into the foundation
Rigid insulation and water control layers are installed on the exterior of a flat foundation wall; spray foam insulates the rim joist
Spray foam extends down the inside of the foundation wall to the uninsulated slab; because the wall lacked exterior perimeter drainage, the slab was cut and an interior footing drain was installed.
The sheathing has rotted because there was not a sufficient drainage gap behind the stucco cladding
This exterior wall retrofit permits drying to the exterior of a sill plate installed on an untreated flat foundation wall
This house design in the Hot-Humid climate uses a slab foundation, masonry walls, and an Exterior Insulation Finish System (EIFS) cladding.
Wrong - The below-grade concrete does not have the correct construction to be impermeable to moisture because the lumber is untreated and against the concrete that lacks waterproofing.
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