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1343 Types and Locations of Vents - Insulation Energy Efficiency - Venting Roofs
 
1343 Types and Locations of Vents - Insulation Energy Efficiency - Venting Roofs -

Image Text: Cross section > Roof vent > insulation > ceiling joist > Soffit vent > 50% of the vents should be down low (soffit vents) while 50% should be up high (roof, ridge and gable vents) this helps to promote good air flow > Cross section > Ridge vent > opening cut in sheathing > air flow > roof rafter > Gable vent > some experts say that soffit vents can be omitted if gable vents are installed at opposite ends of the attic (as shown here)

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INSULATION

The Basics, Air/Vapor Barriers (Vapor Retarders), Venting Roofs, Venting Living Spaces, Attics, Flat and Cathedral Roofs, Walls Above Grade, Basements and Crawlspaces, Floors over Unheated Areas, Ventilation Systems

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