Abstract: The invention provides a fastening plate for securing a membrane to a substrate. The membrane has an inner side to be positioned adjacent to the substrate and an outer side disposed opposite to the inner side, and the membrane also has a dimpled portion including an array of dimples and a substantially smooth top portion. The dimples form depressions on the outer side and corresponding projections from the inner side. The fastening plate has a mating portion including a contact side to be positioned adjacent to the outer side of the membrane, a biasing portion extending from the mating portion. The mating portion includes an array of locator elements projecting inwardly from the contact side for cooperating with a corresponding number of the dimples to position the mating portion on the dimpled portion. The mating portion is adapted to receive at least one fastener.