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Ludowici Interlocking Tile Installation Manual <br />12 www.ludowici.com <br />Fastening Methods <br />Attachment requirements and fastener length are referenced <br />in Chart 13.1 <br />Nails or Screws: Nails are the most commonly used <br />fastener for attaching clay tiles. Nails for tiles and cleats <br />must be copper or stainless steel, 11 gauge minimum, <br />.285"-.312" head minimum and proper length to give <br />good penetration. Screws must be stainless steel or brass, <br />#8 or #9, with a minimum .285"-.312" diameter head. <br />NOTE: The use of Galvanized, Ceramic coated or any <br />other fastener not mentioned above is not acceptable <br />to Ludowici. All components of the roof should have an <br />expected lifespan of 75+ years. <br />NOTE: Each flat Interlocking field tile is provided with <br />(2) two fastening nail holes and French field tile with (1) <br />one. When installing field tiles, care should be taken to <br />fasten each tile with nails or screws in every provided <br />fastening hole. • For a plywood deck, use ring shank copper nails of the <br />specified length to assure good penetration through under <br />side of deck (see Chart 13.1). • For board plank deck, use smooth shank copper nails of <br />the specified length. Fasteners should penetrate deck <br />board 3/4". Do not penetrate underside of deck. <br /> • For gypsum plank or nailable concrete deck, use stainless <br />steel or silicon bronze screw shank nails of length to <br />penetrate half to three-quarters the thickness of the deck. <br />Never penetrate underside of deck.• When insulation is applied over the deck, observe the <br />following: <br />- Minimum slope 3:12 - The tile can be nailed <br />through underlayment and insulation into the deck <br />with a sufficient length fastener. <br />- On 6:12 or greater, a tile-tie system should be <br />used. • For metal decks, use sheet metal screws and the proper <br />mastic.• For fibrous cement decks, use a tile-tie system. <br />NOTE: When using stainless steel screws, tile <br />replacement will require the use of a hack saw to <br />remove the screws. A slate ripper may be used with <br />copper or brass fasteners. <br />Wire: On non-nailable surfaces or some insulated decks <br />or where fastening through the metal flashing needs to be <br />avoided or if underlayment cannot be penetrated, such as <br />special low slope applications, wire and strapping systems <br />are sometimes used. Wire must be 13 gauge stainless steel <br />or 10 gauge solid copper, with or without insulation. Wire- <br />tieing is also usually specified in areas prone to earthquakes. <br />Consult newportfastener.com for specific design and <br />installation assistance. <br />Clips: Wind clips are often specified and/or required in high <br />wind and seismic areas. They aid in holding the tiles in place <br />and reduce stress at the preliminary fastening point. Refer to <br />local building codes in such areas. <br />NOTE: In high wind regions, install each tile with #8 or #9 <br />stainless steel or brass flathead Phillips or square drive <br />screws and/or use a hurricane clip. Hurricane clips and <br />sealants may be required by the local building codes. <br />Bedding Tile: Where freeze-thaw cycles are not an issue, <br />tile may be laid in a full or partial bed of mortar. This method <br />is best used in combination with other means of attachment. <br />Foam Adhesive: This method of application is approved <br />for use in Sun Belt non freeze-thaw areas and is being tested <br />for use in other areas. Refer to local building codes. Do not <br />use single part foam systems with Ludowici tile. Only two <br />part systems such as Polyset® from Polyfoam are acceptable. <br />Visit Polyfoam.cc for design and installation assistance. <br />IMPORTANT: <br />Before application of Ludowici tiles in alpine conditions, <br />plans must be submitted to the Ludowici Technical <br />Department for approval. Ludowici will not assume liability <br />or responsibility for damage caused by the application of <br />clay tiles in Alpine conditions.