A siding contract protects both you and the contractor by spelling out exactly what work will be done, how much it'll cost, and when it'll be finished. Without a solid agreement in writing, you're vulnerable to scope creep, surprise expenses, and incomplete work. Here's what every siding contractor agreement must contain to keep your project on track.
Scope of Work
This is the backbone of your contract. The contractor should describe every detail: whether they're replacing full siding panels, repairing damaged sections, installing new underlayment, or just caulking and painting. Specify the exact siding material—vinyl, fiber cement, wood, composite—and the color or style. If they're removing old siding, clarify who hauls it away and whether that's included in the price.
A vague phrase like "install new siding" invites misunderstandings. Instead, demand specifics: "Remove and dispose of existing vinyl siding from the front and east-facing walls; install new James Hardie fiber cement panels (ColorPlus Technology, color: Iron Gray) with proper flashing and trim."
Materials and Specifications
List every material brand, product line, and quantity. For a 2,000-square-foot home, typical vinyl siding costs $8,000–$15,000 installed, while fiber cement runs $15,000–$25,000, and wood or composite can reach $20,000–$35,000. The contract should itemize:
- Siding panels and color
- Underlayment type (synthetic or felt-based)
- Flashing material
- Trim, soffit, and fascia details
- Caulk and fastener specs
- Any insulation upgrades
Don't let contractors substitute materials without your written approval. This prevents them from using cheaper alternatives that compromise durability.
Cost Breakdown
Ask for a line-item estimate showing labor, materials, disposal, and any permits separately. A transparent breakdown typically looks like:
- Materials: $8,500
- Labor: $4,200
- Underlayment and flashing: $1,200
- Permits and inspections: $300
- Disposal/hauling: $600
- Total: $14,800
Include what's covered by the price and what isn't. For example, does painting trim or replacing rotted fascia boards cost extra? Are window caulking repairs included, or billed separately?
Timeline and Schedule
Siding replacement on a typical home takes 5–15 working days, depending on size and complexity. Your contract should state the start date, expected completion date, and what constitutes a delay (bad weather, unforeseen structural damage). Many contractors include a weather clause allowing schedule adjustments for rain or extreme temperatures.
Ask about daily work hours and how the site will be cleaned up each evening. If this is a critical project—say, before winter—negotiate penalties or incentives for early completion.
Payment Terms
Most siding contractors ask for 50% upfront and 50% on completion. Some request a smaller deposit (25%) to cover materials, then staged payments as work progresses. Never pay 100% in advance; this eliminates your leverage if the work doesn't meet standards.
Include a clause requiring final payment only after you've inspected and approved the finished work. Typical payment schedules:
- 25% upon signing
- 25% when materials arrive
- 25% when rough work is complete
- 25% upon final inspection and approval
Warranties and Guarantees
Reputable contractors offer a workmanship warranty (typically 5–10 years) separate from the manufacturer's warranty on materials. Your contract must state both clearly. For instance: "All labor and installation workmanship guaranteed for 10 years against defects. Manufacturer's warranty on James Hardie panels honored per manufacturer terms."
Ask what the warranty covers—does it include caulking failures, water infiltration, or panel defects? Is it transferable if you sell the home?
Insurance and Licensing
Confirm the contractor carries liability insurance and workers' compensation. Request proof of current, active licensing in your state or county. A contractor without proper insurance could leave you liable for on-site injuries.
Permits and Inspections
Clarify who obtains permits and schedules inspections. Most siding projects require a permit; costs range from $100–$500 depending on your location. The contract should state whether this fee is included in the total or billed separately.
Change Order Process
Despite careful planning, unforeseen issues arise—hidden rot, damaged sheating, structural problems. Your contract should outline how changes are handled: any work outside the original scope requires a written change order signed by both parties before starting, with pricing agreed upon in advance.
Frequently Asked Questions
Q: Should I get multiple siding estimates, and how do I compare them fairly? Yes—get at least three written estimates. Compare identical materials, labor timelines, and warranty terms; the lowest bid isn't always best if it cuts corners on underlayment or guarantees.
Q: What should I do if a contractor wants to start work before finishing the contract? Don't allow it. A signed contract protects you both; verbal agreements lead to disputes and unfinished work.
Q: How can I verify a contractor is legitimate? Check for active licensing through your state's contractor board, ask for references you can actually call, and look them up on the Better Business Bureau. Platforms like Mercoly let you compare and find trusted siding installation and repair providers in one place, making vetting easier.
Find your ideal siding contractor by comparing verified professionals in your area today.