I have a knee wall. What should I do?
In a knee wall situation the goal is to get the intake airflow past the wall. There are two ways to do this.
- If the roof deck is being replaced, install insulation baffles in every rafter from the overhang or undereave level to the peak of the roof. This will allow an even flow of air along the roof deck that will flow past the knee wall.
- Slide wood slats up the underside of the roof deck (for short spans only) and then flip them on edge to force down the insulation. Pull down the fascia to allow access to the underside of the roof deck from outside the house. Someone can feed the wood slats from outside while someone in the knee wall area guides the slats toward the ridge.