Items to Avoid

• Do not perform this work if there is water damage to the existing assembly.
• Do not use this approach on an unprotected horizontal surface (i.e. no overhanging roof), that should instead be designed as a roof.

Items to Incorporate

• Ensure a continuous air barrier by sealing the perimeter of the gypsum board as needed and finishing the joints.
• Ensure an effective vapour retarder is installed by using vapour-retarding paint.