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Most detail drawings show that a footing drain should be located next to the footing. But some builders prefer placing the drain pipe on top of the footing. Which way is correct? Click To Enlarge

Geotextile (filter fabric) prevents dirt from filling the gravel air space, necessary to interrupt the pressure between water and foundation.

Adding a layer of rigid-foam insulation to the outside of a poured concrete foundation saves energy, but it raises a key question: What's the best way of protecting and finishing the foam that remains above grade.

Keeping the foundation warm: A layer of rigid foam insulation on the outside of a poured foundation is a smart move, but choosing a protective covering for exposed insulation above grade can be complicated

Schematic of FPSF and Conventional Foundation Systems | In addition to substantial construction cost savings and reduced excavation and concrete use, Frost-Protected Shallow Foundations also provide significant energy savings as the insulation required typically exceeds existing code requirements.

As energy savings and the conservation of resources increasingly drive decision-making for homebuilders, frost-protected shallow footings offer a good method for constructing slab-on-grade foundations.

Frost-Protected Shallow Foundations

These energy smart details will help you build a tight house with a warm floor

Basement Wall Detail

This detail comes from an Oak Ridge National Laboratory publication, "Foundation Design Handbook.

Build Naturally...Blog: What is a Rubble Trench Foundation?

BUILDING PERMITS Rubble trench foundations meet the requirements and the intent of U. building codes, however, since this system is not sp.

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