Mechanical fastening: spreader plates and screws to approved specification are fastened along the edge of the roof sheet, through the insulation into the roof deck. There is no limitation on the degree of slope and this system can be used for new build or refurbishment.

Ballasted: the membrane is covered with protection and drainage layers as necessary and restrained with ballast, flagstones on pads, or green and garden roof planting systems.

Adhered: the membrane is fully or partially bonded. It is particularly suited to roof refurbishment as some membranes can be bonded directly onto old bitumen or felt.