Procedure: Topping Up Existing Insulation
Remove existing insulation and air seal the attic as shown in the Guide entitled,
BC Housing - Best Practices -
Ceiling Perimeter and Gable End Walls.
Install insulation baffles as required along the roof edge, or above each soffit ventilation port if it is not a continuous soffit vent.
Install batt insulation into every empty joist space to block new blown-in attic insulation from entering the soffit space.
Re-install existing attic insulation (if present).
Install additional attic insulation per the manufacturer's instructions. See previous page for guidance on the appropriate insulation type, and appendices for guidance on the amount of insulation needed.
