If a roofer uncovers damaged decking during a roof replacement, ask for photographs, the affected location, a defined repair scope, and the price calculation before approving additional work under your contract. The immediate goal is to understand what must be corrected before the new roof covering goes on and how that correction changes your agreement.
For Kalamazoo and Portage homeowners, this is a useful conversation to have before tear-off begins. A written plan for concealed conditions makes an unexpected call easier to handle. Here is how to review that call without having to climb onto the roof yourself.
Does a roof replacement include all-new decking?
Not automatically. Decking is the supporting surface beneath the roof covering; replacing shingles and replacing the deck are different scopes. GAF explains that existing decking may remain when its condition is suitable, while damaged areas need attention. The full extent of concealed damage may only become apparent after roofing is removed. GAF: What is roof decking?
Look for the actual decking language in your proposal. Does it include an allowance, a specified quantity, a unit price for additional work, or a requirement for a separate change? “Roof replacement” alone does not answer those questions.
Before signing, ask the contractor to explain what the inspection could establish and what remains uncertain. Keep that explanation alongside the proposal so you can compare it with findings during the job. Our roofing estimate guide covers the broader scope comparison.
Ask for evidence you can understand
Request both a wider photograph that locates the area and a closer photograph of the concern. A close-up of damaged wood can show a problem without telling you where it is or how much work is proposed. Ask the project contact to connect each finding to a location, such as the rear slope near the chimney.
GAF lists softness, sagging, cracking, crumbling, and discoloration among possible signs of wood rot. It identifies leaks and attic condensation as moisture sources. Those observations call for assessment; a photograph alone is not a complete diagnosis. GAF: Roof deck wood rot and sheathing replacement
Use this short question set:
| Ask | What the answer should clarify |
|---|---|
| Where is the concern? | Roof slope or recognizable feature, supported by photos |
| What condition was found? | The contractor's finding and why correction is recommended |
| How far does it extend? | Proposed repair area and any area still concealed |
| What will be replaced? | Decking only or other specifically identified components |
| What caused it? | Known findings, remaining uncertainty, and proposed follow-up |
Stay out of the work area and request documentation from the contractor. You do not need to walk on exposed decking or inspect it from a ladder to participate in the decision.
Separate deck repairs from framing work
Ask the contractor to name the component involved. Plywood or OSB sheathing is different from the rafters or trusses supporting it. A proposal to replace several deck panels does not, by itself, explain a proposed framing repair.
If the findings include supporting framing, ask for a separate description of that work, who will assess it, and whether additional design or inspection coordination is needed. Avoid accepting a single unexplained line labeled “wood.” The selected repair should fit the actual roof and applicable requirements; this homeowner checklist is not an installation specification.
GAF notes that compromised decking may fail to hold shingle nails securely. Ask how the proposed correction will provide a suitable base for the selected roofing system, rather than treating the new shingles as a way to cover an unresolved deck problem. GAF: What is roof decking?
Understand the allowance and added charge
Michigan's Attorney General recommends a signed written contract covering the work, costs, payment milestones, dates, and permit responsibilities. Use that agreement as the starting point for any proposed change. Michigan Attorney General: building and remodeling advice
For decking, ask which unit controls the charge: sheets, square feet, boards, or another stated measure. Then ask what the unit price includes. Material alone and installed replacement are different descriptions; removal, disposal, labor, and related work should be clear.
Hypothetical example, not an Apex project or price quote: a contract includes replacement of two deck sheets. The contractor documents a total of five sheets requiring replacement. If the agreement measures work by whole sheets, the proposed additional quantity would be three. Ask the contractor to show that calculation, the agreed unit price, and any separately proposed work in writing. Do not assume this example reflects your contract's measurement method.
Before approving, reconcile these items:
- Original included quantity or allowance.
- Total newly documented quantity and how it was measured.
- Additional quantity after applying the allowance.
- Unit price and exactly what it covers.
- Separate items, if any, with an explanation.
- Revised total and any effect on timing or payment milestones.
Our roof replacement cost guide explains other budget variables. It cannot substitute for a site-specific quote.
Discuss the cause and the next checkpoint
Replacing damaged wood and addressing the moisture source are related questions. GAF describes identifying the extent of rot, removing affected sheathing, replacing it, and restoring the roof system as common stages of professional repair. Ask how the proposed scope addresses the findings in your home. GAF: Roof deck wood rot and sheathing replacement
If the explanation involves a leak near a penetration, ask which related detail is being corrected. If attic moisture is suspected, ask what assessment remains necessary. Our roof ventilation guide explains why the attic deserves a broader discussion.
Also ask what happens while you review the proposed change: who is your contact, what work can continue, how exposed areas will be managed, and when the next update is due. Agree on the decision process before work starts, especially if you will be away or difficult to reach. For the larger sequence, see what happens on roof replacement day.
Keep a useful closeout record
Save the original proposal, findings photographs, approved change, final quantity, and available completion photographs together. When the invoice arrives, compare the decking line with the approved scope. Ask about discrepancies while the project details are still easy to identify.
For a planned replacement in Kalamazoo or Portage, Apex offers a free 21-point roof inspection with a photo report and an itemized quote when work is recommended. Ask how concealed decking findings would be documented and priced in your proposal. Explore roof replacement services or request your roofing quote.