Moisture and Air: Problems in the Attic and Roof

Moisture and Air: Problems and Remedies
Moisture and Air: Moisture Problems
Moisture and Air: Air Quality Problems
Moisture and Air: Mold Problems
Moisture and Air: Find the Moisture Level in Your House
Moisture and Air: Problems in Your Bathroom
Moisture and Air: Problems in Your Kitchen
Moisture and Air: Problems in Your Bedroom
Moisture and Air: Problems in all Living Areas
Moisture and Air: Problems in Your Basement
Moisture and Air: Problems in the Attic and Roof
Moisture and Air: Problems in the Exterior Wall
Moisture and Air: Ventilation Options
Moisture and Air: Moisture Problems Summary

Typical Signs

• Ice dams.
• Condensation, frost and mold on roof trusses and sheathing.
• Condensation near vents or plumbing stack.
• Condensation near wiring or electric fixtures.
• Water draining from soffit vents.

Possible Causes

• Ice dams.
• Gaps and cracks in ceiling, allowing warm air to escape to attic.
• Uninsulated and unsealed attic hatch.
• Missing chimney firestop.
• Kitchen and bathroom exhaust fans vented into attic.
• Unsealed electrical or plumbing fixtures, vents, etc.
• Leaking roof.
• Leaky, uninsulated ducts in attic.

Practical Solutions

• Carefully seal all penetrations to prevent house air leaking into the attic.
• Seal and insulate attic hatch.
• Install and seal chimney firestop around chimney to reduce air leakage into attic.
• Exhaust all vents directly to outside.
• Seal light fixtures.
• Repair roof and flashings.
• Reduce excess humidity levels in the house.
• Seal and insulate ducts passing through attic.