http://www.bellacerafloors.com/buy-Bella-Cera-hardwoods/Engineered-Hardwood-Flooring.aspx ....... Place your substrate sheets, stretched across the foundation. Make sure that the surface is level, clean, and free of debris.Get your glue warm. It should be slightly above room temperature or it will be very difficult to work with. If it's below room temperature, you'll find it impossible to work with your glue.