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Technical Bulletin - 07-13-2009

WaterBlock RU-200 Roofing Underlayment

Addendum to installation instructions dated 11-01-08  

Re: Installations using concrete tile with anchor lugs, mechanically fastened into batten strips located in wind Zone 1 as specified by FEMA. 

  1. Roofing nails or staples having 1-inch plastic caps shall be spaced at horizontal edges and laps a minimum of 18 inches on center and 6 inches on center at side/end laps.
  2. Corrosion resistant construction grade staples with out plastic caps may be used on vertical surfaces like walls and gable end turndowns. An adequate number of proper length fasteners must be installed to securely hold the RU-200 in place. Staples must be installed flush with surface of the RU-200
  3. Batten strips must be installed the same day as the RU-200.
  4. Batten strips must be securely fastened and in full contact with the RU-200.
  5. Incidental punctures no greater than 3/16 of an inch can be repaired using a heavy bead of WaterBlock Premium Polyurethane Sealant. Area to be repaired must be clean and dry.
  6. Always use best construction practices and follow installation guides as published by the Tile Roofing Institute.

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