A note of interest: If propa-vents are in place under the roof sheathing, they can remain. However, the general consensus among energy professionals is that no vents are needed. A solidly filled cathedral ceiling is fine as long as there is adequate whole-house ventilation. This ventilation can be provided by a simple bathroom vent fan that is on a timer and runs at continuous low speed.
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Tim Gould is director of Energy Egghead (www.EnergyEgghead.com), an Amesbury-based home improvement company, providing energy audits, energy conservation services and MA code compliance certification; 978-388-6349.