The Short Answer: Professional roofing contracts should be fixed-price with clearly defined allowances for unforeseen conditions like hidden decking damage. The base price shouldn’t change, but legitimate additional costs may arise if substantial hidden problems are discovered during tear-off. Any contractor who keeps the quote intentionally vague or adds mystery charges is setting up a bait-and-switch scam.
Understanding the Two Types of Roofing Quotes
Fixed-Price Contract (Recommended Standard)
- Total price locked in for defined scope of work
- Includes normal wear and tear expectations
- Covers all labor, materials, permits, disposal
- Price only changes for documented additional damage
- Protects homeowner from contractor’s estimation errors
Time-and-Materials Contract (Rare, Higher Risk)
- Hourly rates plus material costs
- Final price unknown until completion
- Appropriate only for extensive unknown damage
- Requires detailed daily documentation
- Can spiral out of control without caps
The Right Choice for Most Dayton Homeowners: Fixed-price with decking damage allowance or per-square-foot rate clearly stated upfront.
When Price Changes Are Legitimate (And When They’re Not)
Legitimate Reasons for Additional Costs:
Hidden Decking Damage
- Rotten plywood not visible until shingles removed
- Structural repairs needed for safety and code
- Should be documented with photos before proceeding
- Charged at pre-agreed per-square-foot rate
Unforeseen Structural Issues
- Sagging rafters discovered during tear-off
- Chimney damage requiring masonry work
- Fascia or soffit rot beyond normal scope
- Must be documented and approved before work
Code Compliance Updates
- Local building code changes since estimate
- Ventilation requirements not initially apparent
- Required by inspector during permit process
Homeowner-Requested Changes
- Upgrade to premium shingle mid-project
- Additional work beyond original scope
- Color or material changes after ordering
NEVER Legitimate Reasons:
- “Materials cost more than expected”
- “Job taking longer than we thought”
- “We underestimated the difficulty”
- “Our crew needs more money”
- General excuses without documentation
Red Flag: Any price increase without photo documentation, your approval, and written change order is a scam.
The Decking Damage Dilemma
How Professional Contractors Handle It:
Method 1: Decking Allowance (Most Common)
- Contract includes “$500 decking allowance”
- Covers minor repairs most roofs need
- Additional damage charged at stated rate ($75-100 per sheet)
- Photos taken, approval given before proceeding
Method 2: Per-Square-Foot Rate (Transparent)
- Contract states: “Decking repairs $3.50 per sq ft”
- Damaged areas measured and documented
- You pay only for actual replacement needed
- No surprises about pricing
Method 3: Inspection and Estimate (Conservative)
- Initial estimate includes thorough decking inspection
- Very few surprises during actual work
- May require removing sample shingles
- Most accurate but takes extra time
What Should Be In Your Contract: “Contractor will document any decking damage exceeding the $500 allowance with photographs and receive homeowner approval before proceeding. Additional decking replacement charged at $85 per 4×8 sheet installed.”
Red Flags That Signal Price Manipulation
✗ Bait-and-Switch Warning Signs:
- Estimate significantly lower than competitors (20%+ less)
- Vague line items like “repairs as needed”
- No decking damage rate specified
- “We’ll figure it out when we get up there”
- Refuses to put pricing details in writing
- Claims “every roof has surprises” defensively
- Verbal estimate differs from written contract
✗ Mid-Project Price Inflation Tactics:
- Claims extensive damage without photos
- Pressure to approve immediately (“crew waiting”)
- Won’t let you get second opinion on damage
- Threatens to leave job incomplete
- Damage assessment seems exaggerated
- Changes price for original scope items
Real Example: Dayton homeowner received $8,500 quote, lowest of three estimates. After tear-off, contractor claimed $4,200 in “unexpected” decking damage without photos. Homeowner got second opinion—actual damage worth $600. Original contractor banking on homeowner panic with open roof.
How to Protect Yourself Before Signing
Contract Must-Haves:
Clear Pricing Structure:
- Total base price for defined scope
- Decking repair allowance amount stated
- Rate for additional decking (per sq ft or per sheet)
- Payment schedule tied to milestones
- What’s included and excluded explicitly listed
Change Order Process:
- Written approval required for additional costs
- Photo documentation of additional work
- Itemized pricing for changes
- Right to get second opinion on major additions
- Timeline for approval (you have 24 hours to decide)
Protection Clauses: “Final price shall not exceed quoted amount by more than 10% without homeowner’s written approval. Any additional work beyond original scope requires photo documentation, itemized pricing, and signed change order before proceeding.”
Questions That Expose Pricing Integrity
“Is this price fixed, or could it change?”
- Good Answer: “Fixed price for scope outlined. Only changes if we discover damage beyond our allowance, which we’ll document and get your approval.”
- Bad Answer: “Well, we won’t know until we get up there.”
“What’s your process if you find additional damage?”
- Should describe photo documentation and approval process
- Mention pre-agreed rates for common issues
- Emphasis on transparency and choice
“What’s included in your decking allowance, and what’s your rate for additional?”
- Specific dollar amount and rate stated
- Should match what’s in written contract
- No hedging or vague responses
“Can you show me examples of change orders from recent projects?”
- Demonstrates transparent process
- Shows how they document additional work
- Reveals typical additional cost scenarios
“What happens if I disagree with the need for additional work?”
- Right to second opinion should be stated
- Reasonable contractor welcomes verification
- Defensive response is red flag
Bottom Line: Transparency Equals Trust
Professional Standards:
✓ Fixed base price for defined scope
✓ Decking damage rates specified in contract
✓ Photo documentation for all additional work
✓ Written change orders required
✓ Homeowner approval before proceeding
✓ Reasonable allowances built in
✓ Clear payment tied to milestones
Unacceptable Practices:
✗ Vague “depends on what we find” pricing
✗ Lowball estimate with planned add-ons
✗ Verbal-only additional charges
✗ Pressure tactics for mid-project approvals
✗ No documentation of additional work
✗ Refusing second opinion on major changes
Next Steps: Lock In Clear Terms
Before signing any roofing contract:
- Verify fixed base price for all defined work
- Get decking rates in writing (per sq ft or per sheet)
- Require change order process with photo documentation
- Include price ceiling (not to exceed X% without approval)
- Establish approval timeline (24-48 hours to decide on additions)
Questions for your Dayton roofing contractor:
- “What percentage of your projects end up costing more than the quote?”
- “Can you show me your standard change order form?”
- “What’s your typical decking damage rate on similar homes?”
- “How do you handle disputes about additional work?”
Remember: Established Dayton contractors like Rembrandt Roofing with 20+ years in business have refined pricing systems that protect both parties. Fixed pricing with clear allowances isn’t restrictive—it’s professional. A contractor who can’t commit to transparent pricing is planning to take advantage of your vulnerability once your roof is open.



