Picking the wrong siding contractor can lead to poor installation, costly repairs, and a home exterior that deteriorates faster than it should. Before you sign any contract, you need answers to specific questions that reveal the contractor's experience, credentials, and approach to your project. Here's what separates a reliable siding contractor from one you should avoid.
Licensing and Insurance
Ask to see current licenses and verify them with your state's licensing board—this isn't optional due diligence. Request proof of general liability insurance and worker's compensation coverage; if a contractor gets injured on your property or damages something, you want to know you're protected. Get the policy numbers and call the insurance company directly to confirm coverage is active, not just a photocopy that could be outdated.
Specific Siding Experience
Not all contractors who install siding have equal expertise across material types. Ask specifically about their experience with the siding material you want—vinyl, fiber cement, wood, metal, or composite—since installation techniques and failure points vary significantly. Request references from at least three projects completed in the last 24 months using that exact material. Call those references and ask about weather durability, warranty issues, and whether the job stayed on schedule.
Timeline and Project Scope
Get a written timeline with start and completion dates. Typical residential siding replacement takes 1–3 weeks depending on home size and weather, but this varies. Clarify what happens if weather delays the job, how the contractor handles inspections between phases, and whether they'll remove and dispose of old siding (some contractors charge $1,500–$3,000 extra for this).
Detailed Written Estimate
Never accept a verbal quote. The estimate should include:
- Square footage of siding to be installed or repaired
- Specific material brand, color, and grade
- Labor costs broken down by phase
- Removal and disposal of old siding (if applicable)
- Underlayment, flashing, and trim specifications
- Warranty terms for materials and workmanship
- Payment schedule and deposit amount (typically 25–50% upfront)
A vague estimate that says "siding job—$8,000" is a red flag. Reputable contractors provide granular breakdowns so you understand where every dollar goes.
Warranty Coverage
Ask what the contractor guarantees on their labor—most reputable installers offer 5–10 years on workmanship. Understand the difference between manufacturer warranty (which covers defects in the siding material itself) and contractor warranty (which covers installation quality). Some contractors also offer extended warranties for an additional fee. Get warranty terms in writing and confirm what's excluded.
References and Online Reviews
Beyond the three recent project references, check Google, Yelp, and the Better Business Bureau for patterns in customer feedback. Pay attention to reviews mentioning installation quality, communication, and how the contractor handles problems post-completion. A contractor with dozens of 4+ star reviews and transparent responses to complaints is generally safer than one with few reviews or defensive answers to legitimate complaints.
Subcontractors and Crew
Ask whether the contractor's own employees will do the work or if they'll use subcontractors. There's nothing inherently wrong with subs, but you want to know upfront and confirm they're insured and bonded. Ask about the crew's experience level—do they train installers, or do they rotate different people through jobs?
Communication and Permits
Clarify how the contractor communicates during the project. Will you get daily updates, a project manager's contact, or weekly check-ins? Ask who's responsible for obtaining building permits and paying permit fees (usually the contractor, reflected in the estimate). Confirm whether inspections are required in your area and who schedules them.
Finding Vetted Contractors
Rather than cold-calling every contractor in town, use a platform like Mercoly to compare and find trusted siding installation and repair providers all in one place, complete with verified credentials and customer feedback.
Frequently Asked Questions
Q: How much should I expect to pay for siding installation per square foot? Vinyl siding typically costs $8–$15 per square foot installed, fiber cement $12–$20 per square foot, and wood or composite $15–$25 per square foot. These ranges include labor and materials but vary by region and contractor reputation.
Q: What should I do if the contractor performs poor-quality installation? Document the issues with photos, get a written inspection report from another contractor, and contact your state's licensing board if the work violates building codes. Most jurisdictions require contractors to correct defects within a set period or face license suspension.
Q: Can I negotiate the estimate or ask for a discount? Yes, but get multiple quotes first and compare the scope of work included. Asking for a discount on a legitimate, detailed estimate often signals the contractor will cut corners elsewhere.
Get estimates from at least three licensed contractors and ask every question on this list before deciding.