Choosing a deck contractor is one of the most important decisions you’ll make during a deck project. A deck is not just an outdoor feature, it’s a structural extension of your home that needs to be safe, durable, and able to withstand Michigan’s changing weather.
Questions you should ask a contractor before hiring them to build your deck:
Whether you are building a new deck or replacing an old one, knowing the right questions to ask can help you avoid costly mistakes and ensure your deck is built correctly the first time. The following questions will help you evaluate contractors based on construction quality, long-term performance, and transparency, not just price.
Are you putting any wood directly in the ground that could rot over time?
Wood that is placed directly in soil is constantly exposed to moisture, freeze-thaw cycles, and organic decay. Over time, this can weaken the structure and shorten the lifespan of the deck.
You should ask how the deck will be supported and what methods are used to protect structural components from long-term moisture exposure. Quality construction focuses on keeping framing isolated from soil and water whenever possible. One of the best alternatives is using galvanized steel ground screws, which provide a stable, engineered foundation without burying wood in soil. Ground screws are designed to resist corrosion, perform well in Michigan’s climate, and help extend the life of the entire deck structure.
Are you using waterproof joist tape on all joists and beams?
Waterproof joist tape helps prevent water from sitting on top of framing members and seeping into fastener holes. Without this protection, moisture can lead to rot even when pressure-treated lumber is used.
You should listen for answers that include full coverage on all horizontal framing members, not just select areas. This detail plays a major role in extending the life of the deck’s structure.
How are the deck corners constructed, mitered or weaved?
Mitered corners often look clean at first, but in climates with significant temperature changes, those joints tend to open up as the decking boards expand and contract. This can lead to visible gaps and ongoing maintenance concerns.
Weaved corners allow boards to move naturally over time, helping the deck maintain a cleaner, more consistent appearance long-term. This approach prioritizes durability and performance over short-term aesthetics.
Will a picture frame or parting board be included in the deck layout?
Picture frame and parting boards are more than just decorative elements. They help manage board movement, control seams, and create a more intentional deck layout.
You should ask where these boards will be placed and how they contribute to both the appearance and longevity of the deck surface.
Are all cut ends of pressure-treated lumber treated with a preservative?
The pressure treatment does not penetrate the entire board. When pressure-treated lumber is cut, the untreated core is exposed, making these areas especially vulnerable to moisture and rot.
You should expect all cut ends to be treated with a copper-based preservative to restore protection and prevent premature deterioration.
What size posts are being used to support the deck?
Post size affects the strength, stability, and overall feel of the deck. While smaller posts may meet minimum code in some cases, larger posts often provide better structural support and long-term performance, especially on elevated decks.
You should ask why a specific post size is being used and how it relates to deck height and load requirements. Keep in mind that composite boards are about 2.5 times heavier than wood decking, so larger posts, like 6″x 6″ instead of the traditional 4″x 4″ supports, should be used for all composite decks.
Will you receive a clear and detailed scope of work?
A well-written scope of work should clearly outline what is included, how the deck will be built, and what materials and methods will be used. Vague descriptions can lead to confusion and unexpected changes later.
You should be able to review the scope and fully understand what you are paying for before construction begins.
Are there any potential costs not included in the estimate?
Most projects involve additional requirements such as plot plans, permitting, HOA approval, etc. Make sure to ask if there are potentially any additional costs not listed in the estimate.
You should ask what could cause the price to change so you can plan accordingly and avoid surprises.
Are you receiving an estimate or a fixed quote?
There is a significant difference between an estimate and a quote. An estimate is just that, an estimate, and may change, while a fixed quote clearly defines the agreed-upon price that will not change except through a formal approval process.
Understanding which one you are receiving helps you compare contractors accurately and sets clear expectations from the start.
If materials are similar, why is one price lower than another?
When two proposals appear similar but have very different prices, it is important to understand what is missing. Lower pricing often reflects reduced labor time, skipped construction details, or lower installation standards.
This question helps you evaluate the proposal’s true value, not just the final number.
How will communication be handled during the project?
Clear, consistent communication plays a major role in a successful project. You should ask how often you will receive updates and who your main point of contact will be throughout construction.
Knowing what to expect helps reduce stress and keeps the project running smoothly.
Who will be building your deck, and how is quality supervised?
Ask whether the deck will be built by trained crews or subcontractors and how workmanship is monitored. Quality results depend on proper training, oversight, and consistent standards on every job site.
This question helps you understand how quality is maintained during construction, not just promised during the sales process.
What warranty is provided on workmanship?
While manufacturers often provide warranties on materials, workmanship warranties vary widely. You should ask what protection you have if an issue arises in the future.
A strong workmanship warranty reflects confidence in how the deck is built and installed.
Conclusion
Choosing the right deck contractor goes far beyond comparing prices. By asking thoughtful, detailed questions, you give yourself the ability to compare builders based on construction quality, transparency, and long-term performance.
A well-built deck should provide years of enjoyment with minimal maintenance and no surprises. The right contractor will welcome these questions, explain their approach clearly, and help you feel confident that your deck is being built the right way from the ground up.
