Cost guide · 2026
Roof decking replacement cost
How much does roof decking replacement cost?
Roof decking costs $2 to $5 per square foot installed, or $64 to $160 per 4x8 sheet. Replacing all of it on a 2,000 sq ft single-story home at a 6/12 pitch adds about $4,472 to $11,180.
Partial vs full decking
| Job | Cost |
|---|---|
| One 4x8 sheet, installed | $64–$160 |
| 5 sheets (example: a soft spot around one leak) | $320–$800 |
| Full deck, 2,236 sq ft of roof (about 70 sheets) | $4,472–$11,180 |
| Plywood or OSB sheet, material only | $9–$83 |
Per-sheet installed prices are the per-square-foot range times 32 sq ft. The full-deck row uses the roof area of a 2,000 sq ft single-story home at a 6/12 pitch; it is added to the roof price, not included in it. The calculator below adds either option.
When decking needs replacing
- Soft or spongy spots when walking the roof.
- Rot, delamination or dark water staining seen from the attic.
- Sagging between rafters or trusses.
- Old plank decking with gaps too wide for the new roofing manufacturer's requirements.
Often only the sheets around a leak need replacing. Full re-decking is for widespread rot, a roof that has been leaking for a long time, or a change of roofing material that the old deck cannot carry.
Put it in writing
Because decking is priced after tear-off, it can change the final bill. Before signing, ask for the price per sheet, whether any sheets are included, and a photo of every sheet replaced.
Sources for the figures on this page
Roof decking
- HomeGuide (page dated 2026), retrieved 2026-09-25:
Roof decking replacement costs $2 to $5 per square foot ... Labor costs to install roof sheathing is $1.50 to $3.00 per square foot ... Roofing plywood material prices are $9 to $83 per sheet or $0.30 to $2.60 per square foot
- Fixr (page dated February 4, 2026), retrieved 2026-09-25:
Replacing roof decking costs $2 to $8 per sq. ft.
- Angi (page dated Aug 3, 2026), retrieved 2026-09-25:
roof sheathing often costs between $2 and $6 per [square foot]
Written by the Thomas Town Digital editorial team. We match homeowners with roofers; we do not roof.
Roof decking questions
How much does roof decking replacement cost?
$2 to $5 per square foot installed (HomeGuide), which is $64 to $160 per 4x8 sheet of 32 sq ft.
How much does it cost to replace all the decking on a roof?
A 2,000 sq ft single-story home at a 6/12 pitch has about 2,236 sq ft of roof, so full decking replacement is about $4,472 to $11,180 on top of the roof itself.
How much does a sheet of roof plywood cost?
The material alone is $9 to $83 per sheet, depending on the panel (HomeGuide).
Why is decking not in my roof quote?
Nobody can see the deck until the old roof is off. Ask for a price per sheet for any rotten decking found during tear-off. Ask for that price in writing before work starts.
Add decking to a roof estimate
Low / typical / high ranges from cited national cost tables, adjusted by local roofer wages (BLS). No email required.