The Edge - Q3 2010 - (Page 18)

FLOATING LINERS | by John C. Migliaccio Preventive Measures Are the inside of a vinyl liner pool means fun, swimming and family togetherness, but when water collects on the outside of that liner, it can mean trouble. In the last issue of The Edge, Irene Insignares of Cool Pool & Spa discussed reasons liners float and ways to protect your company from lawsuits when dealing with high groundwater issues and liner replacements. Here, we will focus on preventive measures that will hopefully eliminate the problem altogether before it happens in new pool construction and in liner replacements. We’ll also look at the critical importance of getting the pool owner’s buy-in to pay attention to his expensive backyard investment. In the old days, we used to put in a main drain with a hydrostatic relief valve in vinyl liner pools; however, that resulted in only one spot having hydrostatic relief. The concept today is to have a vermiculite (perlite or sand) bottom and a vinyl liner on top of that material that is constantly fi lled with 20,000 gallons, or 90 tons, of water, which is what the average pool holds. With 90 tons of water bearing down on the liner, ground water will travel around the pool, not float it. THE WATER ON HOW DO YOU SPELL DISASTER? LETTING THE WATER LEVEL DROP! This system works well until the pool owner, through lack of attention, lets the water level drop. I always relate pool concepts to things that my customers can relate to, so I call this the “Martini Syndrome.” That is, if you are at a bar and order a martini and the bartender delivers the martini fi lled to the brim, there is no room for anything else to go in that glass. Now, if you want to drop some ice cubes into the drink, a portion of the drink will spill over onto the bar. It is the same with a vinyl liner pool. Let’s say the pool is filled all the way up and then a cover is placed on it. Then the rains come and the water collects on top of the cover. The rains continue and the cover sags into the pool heavy with water. The water in the pool itself spills out due to the sagging cover pressing down. Water levels in the pool are now reduced and the pool liner could be at risk of floating. Who cares if the water level drops six or 12 inches; there’s still plenty of water left in the pool, right? I relate this to something else my customers understand. I tell them, what if you let 10 pounds of air pressure out of one of your car’s http://www.nespapool.org

Table of Contents for the Digital Edition of The Edge - Q3 2010

The Edge - Q3 2010
Contents
President’s Message
Wise HR Practices Reduce Risk of Employee Lawsuits
Slip, Trip and Fall Accident Control
Project Focus
Preventive Measures Are Best Defense for Floating Liners
Understanding Social Media
Index of Advertisers/Advertiser Websites

The Edge - Q3 2010

https://www.nxtbook.com/nxtbooks/naylor/NSPQ0113
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0412
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0312
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0212
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0112
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0411
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0311
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0211
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0111
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0410
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0310
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0210
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0110
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0409
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0309
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0209
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0109
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0408
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0308
https://www.nxtbook.com/nxtbooks/naylor/NSPQ0208
https://www.nxtbookmedia.com