R-Guard Installation Detail
Pipe or Mechanical Penetrations
wood construction with plywood/OSB sheathing
Mechanically secure loose penetrations at the interior of the wall before detailing. Install non-gassing polyethylene foam backer rod backed by spray foam around electrical fixtures, conduit or plumbing to form a back dam.
Apply FastFlash or Joint & Seam Filler around the wall penetration at a minimum thickness of 12 mils (FastFlash) or 20 mils (Joint & seam Filler). Use a dry trowel or spatula to tool and seal the joint. Create a joint profile that directs bulk water away from the opening.
Provide a minimum 1" overlap of FastFlash or Joint & Seam Filler with the selected PROSOCO primary air and water-resistive barrier.
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