• Substrate should be exterior grade plywood either 5/8 @ sixteen inches centers or 3/4 @ twenty-four inch centers Tongue and Groove select fir plywood .
  
• Concrete must be fully cured. Free of curing compounds and dry surface.
  
• Do not use OSB plywood or pressure treated plywood.
  
• Deck must be clear of debris and a dry surface.
  
• The decks shall incorporate a minimum slope to drain 3/16 of an inch to 1 foot of distance.
  
• The plywood decks should be fastened down with screws and glued.
  
• Vinyl should be installed before siding to run up the wall behind construction paper.
  
• Surface flaws in the plywood shall be filed prior to installation of the membrane by Perma Deck installer.
  

Note: Vapor bubbles may appear after installation but will disappear within a couple of weeks. They may require pressure and heat to reactivate the glue.