Showing results 1 - 48 of 48
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An exhaust fan pulls damp air out of a retrofitted sealed crawlspace while drawing in dry air from the living space
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Basement plan showing sump pump location and perimeter drain that empties to the sump pit
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Because the above-grade potions of the wall lack exterior insulation, condensation and even ice form during cold winter conditions
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Before sealing and insulating the crawlspace, the windows were sealed, the window wells backfilled, and sumps pumps were installed that discharged to the gutter downspouts
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Capillary break at all crawlspace floors using > 6 mil polyethylene sheeting, lapped 6-12 in., and secured in the ground at the perimeter using stakes
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Capillary break at all crawlspace floors using ≥ 6 mil polyethylene sheeting, lapped 6-12 in., and lapped up each wall or pier and fastened with furring strips or equivalent
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Capillary break at all crawlspace floors using ≥ 6 mil polyethylene sheeting, lapped 6-12 in., and placed beneath a concrete slab
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Comprehensive above-grade water management details for a crawlspace foundation include a capillary break over the crawlspace floor, slope the surface grade away, installing gutters that slope away, and capillary break under sill plate.
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Comprehensive water management features include a capillary break (≥ 6-mil polyethylene sheeting) at all crawlspace floors
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Exterior XPS basement insulation is correctly installed to completely cover the foundation wall
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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
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ICF bricks are stacked to form hollow walls that are reinforced with steel rebar before the concrete is poured in
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Right – A sump pump with a perforated sump pit was installed in the crawlspace slab to reduce water accumulation under the slab
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Right – Because this home is in a coastal location that may flood the crawlspace is vented and the home is constructed on metal piers.
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Right – Foil-faced insulation was added after the crawlspace was dried and sealed by diverting water runoff, sealing off crawlspace windows and vents, and adding sump pumps and exhaust fan ventilation
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Right – Foundation drainage mat was installed over the waterproof membrane that covers the sealed crawlspace window
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Right – Polyethylene sheeting vapor barrier is installed and sealed to the crawlspace walls with mastic
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Right – This crawlspace window was completely sealed off on the inside and outside with air barrier and water-proof materials and the window well was filled in to an above-grade height to prevent bulk water from entering the crawlspace
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Right--A heavy polyethylene sheet covers the floor of this crawlspace providing a capillary break and vapor barrier to keep soil gases out of the house.
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Right--The polyethylene ground cover for this insulated crawlspace is taped at seams and around posts before the insulation and slab are installed.
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The top course of these concrete masonry unit (CMU) crawlspace foundation walls and piers is filled with grout then sprayed with a waterproofing membrane that acts as a capillary break and prevents moisture from migrating into the framing material.
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Water-proof materials cover the exterior side of crawlspace windows in a crawlspace retrofit, while foil-faced rigid foams seals and insulates the inside face of the openings
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Wrong - A typical vented crawlspace in North Carolina exhibits water leakage, poor drainage, and a low-quality vapor retarder that does not cover all of the ground surface and is not sealed to the walls.
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Wrong - The sump pump alone cannot address the water infiltration issues in this crawlspace.
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Wrong -The top of the sump pump crock is too high above the crawlspace grade level for any water in the crawl to enter the sump.
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Wrong – A poorly sealed window and window well allow bulk water to enter the crawlspace from ground that slopes toward the structure
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Wrong – No polyethylene sheeting vapor barrier is installed on the crawlspace floor
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Wrong – The polyethylene sheeting vapor barrier is not attached to the piers with mechanical fasteners
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Wrong – The vapor barrier is not secured to the walls of this crawlspace.
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Wrong – This vented crawlspace has standing water because steps were not taken to address site conditions that led to bulk water flow into the crawlspace