Where air can leak out out of your home, water can travel in. Proper ventilation channels are the only way air should be flowing in and out of your home.

Skylights, Plumbing stacks and chimneys are often sources of air leakage out of your home so it stands to reason that water can flow through these same air holes.  Here are some other places to look for leaks.

• around plumbing stacks
• chimneys through the attic
• any light fixtures from the ceiling below
• ducting for fans or heating systems
• perimeter walls
• partition walls
• above pocket doors
• above lowered ceilings
• where the side of a cathedral ceiling meets an open attic
• split level discontinuities
• where additions meet an older section of the house
• above rounded corners or staircases
• balloon frame walls