Roof Venting Vaulted Ceiling

For buildings located in a heating climate zone a problem often associated with inadequately ventilated improperly insulated cathedral ceiling roof assemblies is the formation of ice dams.

Roof venting vaulted ceiling.

Worries about the hot roof un vented cathedral ceiling designs how to. Ventilating cathedral ceilings for a durable roof considerations related to condensation and dew points are critical in controlling the intrusion of moisture in any building and cathedral ceilings are no exception. How to avoid condensation leaks attic mold insulation mold structural damage to roof framing when roof venting is not possible cathedral roof and knee wall insulation venting air path options in older homes hot roof designs. Although there is no separate attic to vent air circulation is still necessary.

Vented cathedral ceiling assemblies incorporate soffit or eave vents adequate open air space between insulation and roof deck sheathing and ridge vents. Research has shown that the amount of airflow in the vent channels of low slope roofs is very limited for roofs with less than a 3 12 pitch. Sketch above showing venting in a steep slope cathedral ceiling roof is courtesy of carson dunlop associates. You ll want a tight ceiling air barrier with no air leakage into the cathedral ceiling a critical detail for all cathedral ceiling designs.

Click to enlarge any image. The question and answer article below paraphrases quotes from updates and comments an original article from solar age magazine and written by steven bliss.