Guardianand#039;s slate roofing is a new solution to tile roofing on domestic and commercial properties. Each individual tile features pre-marked screw andamp; fixings guides as well as horizontal spacers on each side of the tile to inform the installer how close the tiles should be placed next to each other. These features make the installation process even easier and faster.If needed, these tiles, as well as the ridges can be cut with a fine-toothed handsaw or a jigsaw. A fully installed composite roofing system is impermeable, is A Rated to British Building Standards and has a Class IV hail rating.Click here to view our full installation guide for composite slate roofing tiles.Roof PitchGaugeTiles Per Square Metre14 to 22.5 degrees (boarded only)152mm2222.5 to 25 degrees (boarded or battens)152mm2225 to 27.5 degrees (boarded or battens)165mm2027.5 to 30 degrees (boarded or battens)178mm19Above 30 degrees (boarded or battens)191mm18