Replacing your home's siding is a significant investment—often running $15,000 to $40,000 or more depending on materials and square footage. Hiring the wrong contractor can turn that investment into a nightmare of poor workmanship, missed timelines, and costly repairs. Here's how to spot red flags and make a smarter choice.
Skipping Background Checks and References
The biggest mistake homeowners make is hiring based on price alone or a charming phone call. Before you commit, verify that your contractor holds proper licensing for your state (requirements vary widely—some states require specific certifications, others don't). Call at least three references from completed jobs within the last two years, and ask specifically about quality, timeliness, and how they handled problems.
Ask references about the contractor's cleanup process, communication style, and whether the final bill matched the estimate. A contractor who won't provide references should be a dealbreaker.
Not Getting Multiple Quotes in Writing
One quote isn't enough. Get at least three detailed written estimates that break down labor, materials, and any additional costs like permit fees or disposal. Comparing apples to apples lets you spot which contractor is underpricing (often a sign of cutting corners) or overpricing.
The estimate should specify:
- Siding material type and grade
- Whether old siding will be removed or new siding installed over existing
- Warranty terms on materials and workmanship
- Exact timeline and start/completion dates
- Payment schedule (never pay the full amount upfront)
A vague estimate that says "$20,000 for new siding" without breaking it down is a warning sign.
Ignoring Insurance and Bonding
Ask every contractor for proof of general liability insurance and workers' compensation coverage. Call their insurance company directly to verify the policy is active—don't just take a copy of their paperwork at face value. If a worker gets injured on your property and the contractor lacks coverage, you could be liable.
Workers' compensation is especially important; if they can't provide it, they're likely working informally and may cut corners. Bonding also matters—it protects you if the contractor abandons the job or doesn't complete it to spec.
Misunderstanding Material Options
Many homeowners don't fully explore what they're getting. Vinyl siding ranges dramatically in quality; thicker gauges (like 0.044" vs. 0.035") resist denting better and last longer. Fiber cement costs more but handles extreme weather and holds paint better. Wood requires ongoing maintenance. Composite offers durability but at premium pricing.
Your contractor should walk you through these trade-offs during the consultation. If they push one material without addressing your climate, maintenance preferences, or budget, they're not listening to your needs.
Skipping the Site Inspection and Contract Review
Before hiring, the contractor should visit your home and inspect the existing siding, fascia, and framing for rot, pest damage, or structural issues. This tells you whether prep work or repairs will add cost. A contractor who quotes over the phone without seeing your home is cutting corners.
Read your contract completely before signing. It should include a clear scope of work, payment terms, timeline, warranty details, and how change orders are handled. Don't let anyone pressure you to sign on the spot. Take 24 hours to review it carefully or have an attorney look it over if the project is large.
Underestimating Timeline Reality
Quality siding installation takes time. For a typical 2,000 square foot home, expect 5-10 business days minimum, longer if old siding removal, sheathing replacement, or flashing repairs are needed. Contractors who promise completion in 2-3 days are either sandbagging the work or cutting quality.
Weather delays happen too. A professional contract should account for a reasonable weather buffer and specify how delays affect the project timeline.
Using Mercoly to Compare Contractors
Tools like Mercoly let you compare and find trusted siding contractors in your area side-by-side, complete with verified reviews and credentials, so you're not juggling phone calls and scattered estimates across different tabs.
Frequently Asked Questions
Q: What warranty should I expect on siding installation? Most quality contractors offer a 5-10 year workmanship warranty on labor, while material warranties vary by product (vinyl typically 10-20 years, fiber cement 15-30 years). Always get the warranty in writing as part of your contract.
Q: How do I know if my contractor needs to remove old siding or install over existing? Removing old siding costs more but lets the contractor inspect and repair the sheathing underneath; installing over existing is faster and cheaper but can hide structural damage. A reputable contractor will inspect and recommend the right approach for your situation.
Q: What red flags suggest a contractor might disappear mid-project? Demanding full payment upfront, refusing to provide references, no physical office address, and pressure to sign quickly are all warning signs. Legitimate contractors have a clear payment schedule—typically 30% down, 40% at midpoint, and 30% on completion.
Start your search today by getting vetted quotes from local siding contractors in one place.