VERMICULITE
POOL BOTTOMS
SCHUNDLER

PROBLEMS WITH
SAND CEMENT
GROUT BOTTOMS
SWIMMING POOL GUIDE
The Schundler Company
150 Whitman Avenue
Edison, New Jersey 08817
732-287-2244 www.schundler.com



SCHUNDLER V+16, ULTRA MIX AND ULTRA MIX II

Compared to Sand Cement or Grout Mixes


To solve problems caused by steeper slopes and using plain, packed sand, many installers in the pool industry began to use vermiculite concrete as a permanent base for vinyl lined pools. During the last thirty years, vermiculite concrete has proven to be an effective, permanent solution to many potential vinyl pool problems. Using vermiculite may cost a little more, but it is the only alternative with long lasting advantages.

Unfortunately as in many industries, there are slightly less expensive alternatives available to contractors such as sand/cement or grout bottoms. Although sand/cement grout bottoms can work in some instances and may be less expensive, they do have long-term liabilities and can cost more money eventually:

1. Sand/Cement grout mixes produce a concrete that is not porous, and that will not let water pass through it when hydrostatic pressures build up under the bottom of your pool. These kinds of pressures caused by high water tables and heavy rain can break the concrete and leave small hairline cracks and larger more obvious flaws. The sharp, brittle edges of broken concrete will cut and wear down soft vinyl liners eventually requiring liner replacements. And when the liner is replaced, the bottom also will have to be patched and repaired.

2. Pools with sand/cement grout bottoms tend to be very hard and offer no cushioning. This not only feels harder and rougher on your feet, it also contributes to more long-term degradation of the liner.

3. Sometimes installers will boast about how much stronger sand concrete is compared to vermiculite concrete. Consider the facts.

4. Pool repair and liner replacement companies often report that liners placed on sand/cement grout bottoms eventually look like they have been "shot with buckshot" and "rubbed with sandstone." Imagine rubbing your skin with a small block of sand concrete compared to a small block of soft vermiculite concrete!

5. Sand/cement grout bottoms cannot insulate nearly as well as vermiculite concrete that has been used as an insulating product for years.

So why not have your contractor use a product which will last longer while protecting your liner and insulating your pool! Why not have it built the best way?

For more information, please call or contact your local dealer or:

The Schundler Company
150 Whitman Avenue
Edison, New Jersey 08817
732-287-2244 or www.schundler.com

Back to Swimming Pool Construction Main Page