Messages and Online Forum Q&A

Re: Building a Basement

From: info@builderswebsource.com
Category: Foundations and Basements
Remote Name: 63.198.181.43
Date: 19 Feb 2002
Time: 09:08 PM

Comments

While it is true that clay soils can wreak havoc with basements and foundations, anything is possible so long as it is properly engineered and constructed. The first step is to have a soils test conducted by a reputable geotechnical firm. The firm will drill core samples to determine how far down the expansive clay soil goes. Often, the worst soil is only a few feet deep. Once you have a geotechnical report, you'll know all the design characteristics of the soil, including expansiveness, skin friction, compressive strength, etc. From there, a competent architect (and civil/structural engineer) can design a foundation system capable of matching the soil conditions. Proper drainage and waterproofing are also essential, as well as plenty of steel reinforcement in the concrete walls and foundation.

I suspect that most builders in that area just aren't familiar with basement construction or don't know how to approach a proper installation. While adding a basement can be costly, it is nice space to have, particularly if you want a wine cellar.

Whatever you decide, don't cut any corners on the design or installation of the basement. Hire only competent engineering experts and err on the side of over-designing if anything. Once the basement is in, it's costly to remedy any deficiencies. Our technotes on foundation drainage also have some useful tips that will help to keep your basement dry.

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