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Determine the finished patio height. It should be slightly above the surrounding ground so that rainwater won't stand on the surface. Take into consideration the thickness of your paving stone and make sure to leave an extra 6 for your sand and gravel foundation. The
Shanghai Seven Trust Industry Co., Ltd, founded in the year 2008, is a hi-tech enterprise which specializes in the R&D, sales, and service of WPC materials, Provide excellent products, professional technology and sincere service.