Upon request GUARAPLY panels of 12mm, 15mm, 18mm and 21mm and, of all available grades may be delivered with T&G (tongue and grooved), machined profiles on the long edges. T&G panels are specially recommended for floor and roof decking applications to obtain an increased point load resistance on panel joints. They may also be a good option for wall paneling, offering very well matched joints. T&G profiling is a sizing operation so panels have a net face width of 1.205mm +0/-3mm. A specially designed gap is left on the back of the T&G joints so that panels can expand sligthly when in contact with water, avoiding buckling problems.