Ainsworth. Engineered to accommodate the effects of swelling due to moisture, PointSix OSB Flooring has a patented tapered-edge technology in which 0.6 mm of material is milled off at the edge. If edge swelling occurs, the OSB stays flat at the seams. Premium level PointSix Durastrand Flooring also carries a limited lifetime warranty against delamination and a 180-day No-Sand Guarantee. 877.661.3200. www.pointsixflooring.com.