Water intrusion around windows and siding

Window and Siding Leaks and Mold

Small gaps in exterior walls can feed hidden mold for months before you see damage.

How Water Enters

Failed flashing around windows and doors
Cracked or missing caulk lines
Siding gaps that channel rain inward
Improperly installed window pans

Indoor Clues

Staining at window corners or below sills
Soft drywall around window frames
Musty odors near exterior walls
Peeling paint or wallpaper

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4 more indoor clues

Exterior Causes

Flashing Failures

Missing head flashing above windows
Improper overlap between flashing layers
Gutters overflowing onto walls

Siding Problems

Cracked or warped siding boards
Gaps at corners and joints
No drainage plane behind siding

Exterior Maintenance

Clean gutters and downspouts regularly
Extend downspouts to carry water away from walls
Maintain caulk and sealant around windows
Keep soil sloped away from the foundation

Steps After Discovery

1

Stop the water source

Fix flashing or siding defects first.
2

Assess interior damage

Check insulation and framing for wetness.
3

Dry affected materials

Use dehumidification and airflow promptly.

Prevention