Screw Placement & Lapping


Diamond Rib / WF-928 / WF-1236



  Duraclad / Allclad



  Weathershield 1


Weathershield 2



  WF 7/8 Corrugated Wall



  WF 7/8 Corrugated Roof



  • Use a 10 x 1½ Screw in the lows every 2nd row staggered.
  • Use a 10 x 1½ Screw along the bottom edge of the sheet.
  • Use a 12 x 7/8" Stitch Screw in the side laps every 2nd row.

  At the eave and ridge screw every low.


Washer / Weather Guard Dome

Neoprene washer slightly visible at edge of metal washer. Assembly is weather tight.   Neoprene washer not visible, not enough compression to seal properly.   Metal washer deformed. Neoprene washer extruded beyond edge of washer.
    Sidelap Sealant


  Low sloped roofs and high wind areas.