Building a Sister Wall: The Form is up

A sister wall is a poured concrete wall built on the interior of a foundation to reinforce a weaker foundation. These sister walls are installed parallel to the existing wall, creating a sandwich of of the new interior poured wall and the exterior soil providing support for the old foundation. Need a better picture? Visualize a S'Mores treat. That's right, two graham crackers, a block of chocolate and a marshmallow. A S'Mores is a lot like a proper application of a sister wall. The first graham cracker is the soil on the outside of the foundation. The gooey insides are the existing, unstable wall. The second graham cracker is the sister wall. By placing stiffer, more rigid graham crackers around the gooey insides of a S'Mores, you create a stable sandwich--exactly like the combination of solid exterior soil and a sister wall to an aging stone or brick foundation wall.

 

Voila! That's the proper application of a sister wall. S'Mores, anyone? Want to know more? Contact Peak Structural at www.peakstructural.com or call us at 303-243-3028

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