Roof Problems ยท For homeowners
Wavy Roofs and Heat-Stressed Decking
A wavy roof line can mean the deck boards underneath have warped or sagged.
Causes
Poor ventilation, moisture, undersized boards, or missing spacing clips.
Checks
Attic inspection for sagging, dark stains, or soft wood.
Fix
Usually handled during replacement, by replacing affected decking and correcting ventilation.
Common questions
- Is it dangerous?
- Badly sagging decking should be checked soon.
- Can shingles hide it?
- Partly. Waves often show at certain sun angles.