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Ludowici Interlocking Tile Installation Manual: LudoSlate & LudoShake <br />58 www.ludowici.com <br />Staggered Application <br />LudoSlate™ and LudoShake™ can be laid with staggered <br />butts to achieve a more rustic appearance. <br />The roofer will need to snap off the waterlock knockouts <br />on both the lower left corner and the upper right corner to <br />allow the tiles to be laid staggered. <br />Strike the chalk lines in the same method as a standard <br />installation. Lay the first course in a straight line. On the <br />second and above courses lay the tiles on the chalk line <br />and randomly drop some up to 3/4" below the chalk line to <br />achieve the random staggered look. <br />Figure 58.3 Staggered Layout <br />Nip Off the Waterlock Knock <br />Out to Allow Staggered Lay Up <br />Nip Off the Waterlock <br />Knock Out to Allow <br />Staggered Lay Up <br />Figure 58.2 Staggered Tile Prep <br />First Row of Tiles Installed <br />With No Stagger <br /> Snow Guards <br />Snow guards are generally required in areas where <br />snow and ice may accumulate on the roof. Snow guards <br />are sometimes used on sloped roofs to prevent a mass <br />of snow or ice from sliding off the roofs and injuring <br />persons, damaging gutters or plants and blocking walks <br />and driveways. Snow guards hold the snow in place above <br />the eaves until it can melt and the water runs off. <br />It is recommended that snow guards should be installed <br />on at least 3 or 4 courses, offset from course to course, <br />spaced in staggered interval rows. Begin with the third <br />or fourth row. However, spacing and quantity of snow <br />guards is a matter of judgement based on local weather <br />conditions (see Figure 60.1). <br />Alpine conditions will require a professional engineer to <br />design the required snow retainage system. Tile should <br />not be exposed to ice and snow loads exceeding 100 <br />pounds per square foot. <br />A snow guard must be made of nonferrous material <br />to prevent possible rust stains. <br />Figure 58.1 Snow Guard Spacing