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The floor of the sealed insulated crawlspace is covered with a heavy plastic vapor-barrier sheathing that is taped at all seams and around the foundation piers to prevent water vapor from moving into the crawlspace.

The floor of the sealed insulated crawlspace is covered with a heavy plastic vapor-barrier sheathing that is taped at all seams and around the foundation piers to prevent water vapor from moving into the crawlspace.
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The goal of foundation moisture management is to construct the basement, crawlspace, or slab in a way that keeps moisture from getting in in the first place

The goal of foundation moisture management is to construct the basement, crawlspace, or slab in a way that keeps moisture from getting in in the first place
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The green-lit panel next to the fan and light switches is an indoor air quality sensor that will automatically turn on the exhaust fan if it detects a rise in humidity or indoor air pollutants.

The green-lit panel next to the fan and light switches is an indoor air quality sensor that will automatically turn on the exhaust fan if it detects a rise in humidity or indoor air pollutants.
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The grooves and ridges within flexible ducts can collect dust and dirt

The grooves and ridges within flexible ducts can collect dust and dirt
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The Habitat affiliate makes its own “ICF” foundation walls with rigid foam held in place with wood spacers.

The Habitat affiliate makes its own “ICF” foundation walls with rigid foam held in place with wood spacers.
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The home is equipped with an advanced filtration system capable of removing 99.7% of contaminants from the indoor air.

The home is equipped with an advanced filtration system capable of removing 99.7% of contaminants from the indoor air.
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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 home’s slab-on-grade foundation is wrapped in a blanket of rigid foam extending completely under the slab and along the edges.
Video:

The Importance of a Continuous Load Path

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The leaks in this foundation wall have been injection sealed to prevent water infiltration into the foundation.

The leaks in this foundation wall have been injection sealed to prevent water infiltration into the foundation.
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The MERV rating, particle capture efficiencies, and pressure drops are printed on the side of this 1-inch pleated filter

The MERV rating, particle capture efficiencies, and pressure drops are printed on the side of this 1-inch pleated filter
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The pier foundation that lifts this home above flood waters is visible in this photo taken before the skirt walls were added.

The pier foundation that lifts this home above flood waters is visible in this photo taken before the skirt walls were added.
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The polyethylene ground cover in the crawlspace is continuous at interior posts and piers

The polyethylene ground cover in the crawlspace is continuous at interior posts and piers
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The post-and-pier foundation of this home failed in an earthquake

The post-and-pier foundation of this home failed in an earthquake
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The rails on these stairs were enclosed with siding, presenting a greater obstacle to the flow of flood water and contributing to the flood damage shown here.

The rails on these stairs were enclosed with siding, presenting a greater obstacle to the flow of flood water and contributing to the flood damage shown here.
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The recommended approach for groundwater management in cases where the foundation is entirely above the groundwater table.

The recommended approach for groundwater management in cases where the foundation is entirely above the groundwater table.
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The seams of the rigid insulation are not taped and it will not provide a complete capillary break

The seams of the rigid insulation are not taped and it will not provide a complete capillary break
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The sheathing has rotted because there was not a sufficient drainage gap behind the stucco cladding

The sheathing has rotted because there was not a sufficient drainage gap behind the stucco cladding
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The slab edge of this floating slab and the stem wall are insulated to thermally separate the conditioned living space from the garage

The slab edge of this floating slab and the stem wall are insulated to thermally separate the conditioned living space from the garage
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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.

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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The universal retrofit foundation plate is used to connect the concrete foundation to the sill plate as part of a seismic retrofit

The universal retrofit foundation plate is used to connect the concrete foundation to the sill plate as part of a seismic retrofit
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There are many consumer-grade air sensors that can be installed in homes.

There are many consumer-grade air sensors that can be installed in homes.
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There is 6 mil. polyethylene sheeting installed and sealed in the crawlspace

There is 6 mil. polyethylene sheeting installed and sealed in the crawlspace
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There is no polyethylene sheeting installed between the ground and the slab

There is no polyethylene sheeting installed between the ground and the slab
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There is no polyethylene sheeting installed in the crawlspace

There is no polyethylene sheeting installed in the crawlspace