Insulating Foundations

JLC Field Guide: Insulating Foundations

Below-grade heat loss can be significant in colder climates. And as with any structure in the ground, you also have pay close attention to water and moisture issues. But the marriage of moisture and insulation is not always a happy one.

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Insulating Foundations Featured Articles

Warmer, Drier Basements
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Warmer, Drier Basements

Superior Wallsí XiPlus foundation panels have an insulation value of R-21 More

Insulated Foundation for an Urban Infill Site
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Insulated Foundation for an Urban Infill Site

JLC visits the Boston neighborhood of Jamaica Plain to see how Placetailor... More

Insulating Foundations Instruction

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Calculating FPSF Insulation Requirements

There are two good sources for designing frost-protected shallow foundations (FPSFs). More

Q&A: Retrofitting a Walk-Out Basement
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Q&A: Retrofitting a Walk-Out Basement

How do you protect the footing and foundation from frost in a very cold climate... More

Insulating Outside the Foundation
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Insulating Outside the Foundation

Best practices for insulating a foundation. More

Frost-Protected Shallow Garage Slab
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Frost-Protected Shallow Garage Slab

Instead of excavating to below the frostline, insulate below the edge of the slab... More

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Insulating Basement Walls

Q. I'm doing a basement remodel and am thinking of finishing the block foundation walls by painting the masonry with Drylok, then adhering 4-mil poly over that. Next, I plan to fur the walls with Z-studs, put 2 inches of foil-faced polyiso board between t More

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