Technical Bulletin # 1   TB-1
Subject: Page 2 of 2
Pressure Cracking of Pool Liners During Storage
--Continued
 
Recommendations for Minimizing Formation of "Pressure Cracks"
 
1. Do not unfold liners at temperatures below 70°F, in the plant or prior to
  installation of the liner at the pool site. This is especially critical during
installation in the fall, when morning as well as daytime temperatures
can be well below 72°F.
2. Do not store a boxed liner outside or in an unheated storage area prior to
  installation at the pool site during the cooler spring or fall season. The liner
  may not necessarily warm up sufficiently in a span of a few hours in the
  morning due to the insulation provided by the outer layers of the liner.
3. Minimize the length of time finished liners are stored in cartons.
4. Ideal storage temperature is 70-72°F.
5. Minimize or eliminate stacking of cartons to reduce pressure.
6. Keep the number of folds in the liner to a minimum.
7. Use larger cartons for large liners; cartons that resist collapsing under
  pressure will afford more protection to the liner.
 
 
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