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

 

Prolok

    Prolok
  • 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.