Costs · 4 min read
Roof Decking: When It Needs Replacing and What It Costs
Published
Decking replacement is the most common change order on a roofing job, and the way a contractor prices it up front tells you a lot.
Why decking fails
Chronic leaks delaminate OSB. Long-term condensation from poor ventilation rots plywood from underneath. Older plank decking splits and pulls away from rafters over decades of thermal cycling.
You can't know until tear-off
Anyone who promises no decking will be needed hasn't seen under the shingles. A reputable contractor gives you a per-sheet price in the proposal so the cost is known even if the quantity isn't.
Typical cost
Expect $75 to $130 per 4x8 sheet installed, depending on thickness and access. Most jobs need zero to four sheets; a chronically leaking roof can need dozens.
Plank decking
Older Troy and Piqua homes often have gapped board decking. Gaps over an inch require overlaying with new sheathing, which is a meaningful cost increase that should be flagged before the job, not during.
If any of this applies to your own home, our roof replacement crews handle it every week, and you can see how we work in your area on our Troy, Ohio roofing page. Inspections and written estimates are free either way — call 937-749-7767.