Specifications
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Course thread screws are 1 3/4″ long
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Ceramic coated, no oxidation
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Galvanized washers are 1 3/8″ wide
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Penetrating washers to secure to the surface of the foam board
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Underlayment
Installation Requirements
Maximum recommended fasteners spacing every 12″. It is best to create a slight depression in the board to reduce build up on the board. Cover each screw and seam with at least 2″ overlap with thin-set and seam tape.