Conditioning Crawlspaces

JLC Field Guide: Conditioning Crawlspaces

Sealing and insulating a crawlspace will save energy and reduce the chance of mold and mildew compared to a vented crawl—but only if the builder uses careful air sealing and climate-appropriate insulation.

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Sealing a South Carolina Crawlspace

Coastal Connection visits the job site with specialty contractor Energy One... More

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Venting the Crawlspace

Most crawlspaces are vented to the outdoors, but encapsulating the crawlspace has... More

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Seal Seams In Crawlspace Liners

The crawlspace of a home was consistently wet — in spite of the 6-mil poly liner.... More

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Fixing a Wet Crawlspace

A crawlspace expert describes how he turned a damp bug- and mold-infested... More

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Conditioning Crawlspaces Instruction

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LVLs Rotting in Crawlspaces

Q. Many homes in the Dallas area are built on crawlspaces and use LVL beams. Most of these homes have dirt floors but are built to code with regard to crawlspace ventilation. In many cases, I'm finding that the engineered wood is rotting at the point wher More

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Best Flooring for a Humid Climate

Q: I'm planning on installing laminate flooring on the first floor of my North... More

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Q&A: Crawlspace Insulation

Q: I am building an addition over a 30-inch-high crawlspace. The local inspector has approved my plan to build a sealed crawlspace without ventilation. Should I install rigid foam insulation on the interior of the block walls, or should I insulate between More

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Q&A: Leaving Rigid Foam Exposed in Crawlspace

Q: I plan to install rigid foam insulation in a crawlspace. As far as I know, most types of rigid foam insulation can’t be left exposed but need to be covered with a layer of drywall for fire resistance. Is there a type of rigid foam insulation panel avai More

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Q&A: Drying Out a Damp Crawlspace

Q: To dry out damp crawlspaces in Virginia, I have had success closing the crawlspace vents and installing a dehumidifier. Are there any other measures I could be taking? What is an appropriate relative humidity level for a crawlspace? More

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