GenStone Faux Brick Ledger 42" x 3" x 3.75" in Classic Brick Color for Do It Yourself Friendly Home Improvement Projects. Features : Save up to 50% over masonry work. Do-it-yourself friendly, no mortar no mess and virtually maintenance free. Box to the wall in minutes, simply follow the step by step installation videos available on the GenStone YouTube page.. Can be cut to size with any hand or power saw. Exterior Projects: Attach with deck screws and premium adhesive. Interior Projects: Attach with drywall screws. Over Concrete or Stucco: Attach with Tapcon screws and premium adhesive.. All raw materials are sourced in the USA. Made with high-density closed cell polyurethane and a custom engineered combination of additives to create a lightweight, easy to cut and install material. Hand painted with 12-coats of premium exterior paint. R-Value of 3.41 per inch. 100% waterproof. Product has been tested for weather extremes, wind and impact.