Hiring the wrong deck contractor can cost you $15,000 in repairs within five years. The low bid that looked like a deal in spring starts to look very different when boards warp, and your contractor is unreachable. Ask these five questions before you sign anything.
1. Are You Licensed, Insured, and Bonded in Pennsylvania?
This is the non-negotiable. If the answer is anything but a confident yes with documentation, walk away.
Licensing confirms the contractor meets state minimums. Insurance protects you if a worker is injured or your home is damaged. Bonding covers you if the contractor fails to complete the job. You need all three.
Ask for certificates of insurance and a license number you can verify. A legitimate contractor will have these ready without hesitation.
Green flag: Documentation provided upfront, before you ask twice.
Red flag: "I'll send that over later."
2. How Much Experience Do You Have With My Preferred Material?
Installing composite decking is not the same as installing pressure-treated lumber. The wrong technique with the right material still produces bad results.
Composite and PVC boards require specific fastening systems, expansion spacing allowances, and handling practices that differ from those for traditional wood. A contractor who mostly builds with pressure-treated lumber may not be the right fit for a Trex or TimberTech project.
Ask to see completed examples of your specific material type. Job site visits or direct references beat photos every time. And if you are still weighing which material makes sense for your home, the choice between wood, composite, and PVC comes down to your local climate and maintenance tolerance as much as budget.
What to Ask About Material Experience
- How many composite or PVC decks have you built in the last two years?
- Which brands do you have the most experience installing?
- Are you a certified installer for any decking manufacturers?
Manufacturer certifications matter because some brands extend warranties only through certified installers, meaning the contractor's experience directly affects your coverage.
3. What Does Your Warranty Actually Cover?
There are two separate warranties for every deck build, and most homeowners think about only one.
The manufacturer's warranty covers the material against fading and defects. The workmanship warranty covers the quality of the installation, and that quality depends entirely on who you hire. Many contractors offer nothing in writing on labor.
A one-year workmanship warranty, like the coverage offered by Booher Construction, gives you written confirmation that the contractor stands behind their work. Decks typically deliver a 71% ROI, but only when built correctly and backed by someone accountable.
Questions to Ask About Warranty Coverage
- What does your workmanship warranty cover and for how long?
- Is it in writing and included in the contract?
- What is the process if something goes wrong post-installation?
Red flag: A verbal warranty or vague language about what "guaranteed" actually means.
4. What Is the Timeline and How Do You Communicate During the Build?
A deck project without a clear timeline will drag.
Most residential builds run two to six weeks. Delays happen. What is unacceptable is a contractor who cannot provide a start date, a completion window, or a named point of contact for questions.
Poor mid-project communication is one of the most common complaints among contractors. It erodes trust fast.
What a Professional Timeline Looks Like
- A written scope of work with a defined start date
- Milestones, so you know what to expect at each phase
- A named contact for questions during the build
- A clear process for communicating delays
Green flag: A contractor who walks you through the timeline during the estimate, not after you sign.
5. Can You Provide References From Recent Local Projects?
Recent and local both matter. A reference from three years ago in another region tells you very little.
A reference from the last 12 to 18 months in your area gives you a much more accurate picture of what working with this contractor looks like. Direct conversations reveal what no Google review captures.
Pay attention to how references talk about problems, not just results. Every project hits a snag at some point. A contractor who communicated clearly, showed up when they said they would, and resolved issues without drama is worth far more than one who delivered a flawless build on a project that had no complications. How they handle the hard moments tells you everything.
What to Ask a Reference
- Did the project finish on time and within budget?
- How did the contractor handle unexpected issues?
- Would you hire them again?
Reviewing customer testimonials is a useful first step, but a direct reference call is always worth the extra ten minutes.
One More Thing: Who Pulls the Permits?
Unpermitted decks create complications at resale, can void homeowner's insurance, and may require costly teardowns to bring into compliance. A reputable contractor handles permits and inspections as a standard part of the process.
What that process typically looks like: the contractor submits plans to your local municipality, waits for approval before breaking ground, and schedules a final inspection once the build is complete. It adds time upfront, but it protects your investment and keeps the project above board. A contractor who skips this step is saving themselves the paperwork, not you.
Red flag: Any contractor who frames permits as optional or is too slow to bother with them.
The Right Contractor Answers All Five Confidently
Price matters, but the real cost of a deck project includes what you spend fixing mistakes a better contractor would have avoided. Get answers in writing, check references, and choose someone who treats your project as a long-term commitment.
