Leveling deck posts accurately, solo, and without the frustration of re-digging footings is one of the most common challenges for Canadian DIYers and pros alike. The right technique can save hours of manual correction later, prevent long-term maintenance issues, and ensure your deck structure stands the test of time. At The Ultimate Deck Shop, we’ve helped thousands of homeowners and contractors build decks that stay true, straight, and safe—all while minimizing wasted effort and material.
Definition: Leveling Deck Posts (No Re-Digging Required)
"Leveling deck posts" means adjusting the height and vertical alignment of all posts so the top surfaces form a perfectly flat, straight plane for beams and joists to sit on. The goal is to achieve this alignment before major framing, without having to move or re-dig existing footings.
The Easiest One-Person Method: Adjustable Deck Leveling
For anyone building solo, the best method combines precise measurement, temporary support, and the use of adjustable hardware where needed. At The Ultimate Deck Shop, we recommend the following workflow—a process refined with tools and products available directly from our stores.
Step-by-Step Framework: Solo Deck Post Leveling
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Set All Footings and Install Posts
Start with footings at correct code-compliant depth. Attach pressure-treated (or approved) posts to each footing using standard brackets or anchors. -
Mark Desired Beam Height
Determine your finished beam height (taking into account any slope for water runoff) and mark this height on one reference post. Use a builder’s level (laser or water level) to transfer this elevation mark to every post. -
Use a Template or Adjustable Support
Clamp a straight 2x4 or 2x6 horizontally to your reference mark, then use this as a portable template to check height and alignment at each post. Alternatively, for fast, repeatable accuracy and micro-adjustments, consider an adjustable deck support:
These supports allow you to fine-tune height with a simple turn—perfect for fitting beams without struggle or heavy lifting.
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Mark, Cut, and Cap Posts as Needed
With all heights confirmed, mark each post for cutting. Use a circular or miter saw to trim them to the precise level—double-check with your portable template or laser at every cut. Immediately treat cut ends with a sealant to prevent moisture issues (see our deck maintenance guide for best practices). -
Install Beams—No Fighting Required
With all post tops flat and aligned, setting beams takes only minutes. No wrestling or shimming required. If further adjustments are required under any post due to footing settlement or misshaped concrete, use a solution like the GH The Leveller 3" for post leveling in place.
The GH Leveller offers easy, tool-free height adjustments after installation—making it one of the most reliable systems for one-person leveling.
Best Practices for Level Deck Posts: Insights from The Ultimate Deck Shop
- Always check for plumb using a 4-foot level on both faces of each post after installation and adjustment.
- Laser levels speed up marking and cross-checking, especially for larger decks or uneven ground.
- Whenever possible, cut and seal posts before assembly to save finishing work and avoid moisture wicking into endgrain. See our maintenance tips here.
- Use deck leveller plates (GH Deck Leveller Plate) for extra stability if your support system requires a solid base on concrete or patio stones.
- Verify all measurements twice. A single misstated mark can throw off your entire frame and induce hours of troubleshooting.
Alternatives and When to Use Them
- Fixed Post Brackets: For simple, level ground, or where budget dictates, classic fixed post brackets work but offer no after-install adjustment. Any error means shimming or re-cutting.
- Adjustable Deck Supports: Reliable for terrain with minor undulations or where future re-leveling may be needed (for example, over patio stones on ground-level decks).
- GH Leveller Systems: Excellent for posts that may need micro-leveling after structure settles or on patios with slight movement.
How Not to Level Posts (Common Mistakes)
- Never rely on sightlines or "eyeing it"—always use mechanical or laser levels.
- Do not skip end-sealing after cutting posts. Moisture entry causes premature rot.
- Avoid shimming more than a few millimeters. Thick or stacked shims can shift over time.
- Don’t guess footing depth or stability. Unstable posts will always go out of level, affecting the deck above. See our past coverage on frost-depth and footing best practices.
Ensuring a Level Deck Lasts: Maintenance and Long-Term Care
Even with perfect initial leveling, decks face ground heave, water pooling, and seasonal changes. Proactive deck maintenance—such as cleaning, keeping debris off, checking for water pooling, and sealing cracks—keeps deck structures in top shape. For a detailed guide on post-install protection, see our deck maintenance resources.
Product and Tool Recommendations (Curated by The Ultimate Deck Shop)
- GH The Leveller 3" — Single-tool, award-winning option for solo leveling and post adjustment.
- Pylex Adjustable Deck Support — Supports posts during and after install; ideal for uneven surfaces.
- GH Deck Leveller Plate — Provides a stable base for adjustable supports.
Many of these tools are available for purchase or rental at The Ultimate Deck Shop locations in Regina and Saskatoon, as well as through our online store.
Frequently Asked Questions
What can I do if my footings are already set but are uneven?
If your concrete footings are at different heights, using adjustable deck supports or a product like the GH Leveller allows micro-leveling the posts above the footing, often without removing or re-pouring concrete.
Is a laser level necessary for solo deck building?
Laser levels are a time-saving bonus, especially on large projects, but a manual level and a solid template board will suffice for most standard decks.
Can I use regular wood shims to correct post height?
Thin composite or plastic shims may be used for minor corrections, but relying on stacked wood shims is not recommended. They compress, attract moisture, and may shift. Use products intended for outdoor, load-bearing applications.
How do I prevent rot at the post base?
Seal all cut ends of posts immediately after trimming. For posts in contact with concrete footings, always use an approved post base or bracket to keep wood above grade and allow drainage. More details are in our deck maintenance page.
What if I want professional assistance?
The Ultimate Deck Shop offers 3D design, assisted DIY, and managed installation services in Saskatchewan and shipping across Canada. Our team can help from foundation to finish.
Conclusion
Leveling deck posts single-handedly is no longer a daunting task. With a repeatable marking method, quality adjustable supports like the GH Leveller or Pylex Adjustable Deck Support, and solid reference tools, anyone can achieve reliable, professional results. If you have additional challenges—unusually sloped yards, large multi-tier builds, or want to save even more time—our team at The Ultimate Deck Shop is your expert partner.
To keep your deck looking and performing great for years, don't forget ongoing care. Check out our deck maintenance page for seasonal guidance on cleaning, sealing, and protecting your investment. And for project advice, quality tools, or expert consultation, contact us today—we’re here to help every step of the way.
