The Dock Shop
4'X20' DIY Dock Kit
4'X20' DIY Dock Kit
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Just Buy and Build
The Dock Shop DIY Kits simplify the dock building experience. Each kit includes all required flotation and hardware for your selected platform size and freeboard — removing the guesswork so you can build with confidence.
Key Features
- Includes all required dock floats and structural hardware for the selected platform size.
- Top quality Eagle Float dock floats, MADE IN AMERICA, with proven bouyancy distribution and weather resistant longevity.
- All structural hardware is MADE IN AMERICA from hot-dip galvanized 1/4" steel.
- Pre-designed freeboard options to remove guesswork and ensure customer satisfaction.
- Designed for use with 2" × 6" pressure-treated framing lumber, also compatible with 2" x 8".
- Lumber NOT included.
Important Notes
Kit-specific assembly instructions are not included, but our DIY Dock Builder's Guide provides detailed step-by-step building instructions.
Connection kits are not included. If you need to connect dock modules or connect to the shoreline, be sure to add a Connection Kit.
Due to normal plastic shrinkage, dock floats may be 1–2% smaller than their advertised size. We highly recommend waiting until floats arrive before cutting any lumber.
“Float Freeboard” is measured from the top of the float to the water surface under dead load only. Live load (people, furniture, equipment) will reduce freeboard.
All freeboard values may vary slightly depending on lumber species, decking weight, and environmental factors.
Frequently Asked Questions (FAQ’s):
Q: I'm not sure what I need. Can someone help me plan my dock?
A: Absolutely. Visit our Contact Page for live, U.S.-based support via phone and email.
Q: What is Freeboard? What is Float Freeboard?
A: Freeboard is the distance from the top of the dock to the waterline. Float Freeboard measures from the top of the float to the waterline. Because dock materials vary in height, all Dock Shop DIY Kits use float freeboard for consistent, standardized measurements.
Q: Does this kit include framing lumber and/or decking?
A: No. Framing lumber and decking is not included. Kits are compatible with 2x6 or 2x8 pressure treated framing lumber, as well as both wood and composite decking.
Q: Are connection kits included?
A: No. Plan for one Dock Shop Connection Kit to connect each module and to the shoreline if required.
What's Included?
Floats:
| Freeboard Option | Floats Included* | Approx. Live Load |
|---|---|---|
| 6" | Four count of 2′ × 4′ × 12" |
~1,000 lbs (~5 people) |
| 10" | Four count of 2′ × 4′ × 16" |
~1,500 lbs (~8 people) |
* Float dimensions may vary up to 2% due to standard plastic shrinkage.
Hardware:
- 16 × Lag Bolts and Custom Washers (for float attachment)
- 4 × Outside Corners
- 4 × Inside Corners
- 8 × Angles
- 16 × Washer Plates
- 64 × 1/2"-13 × 3" Carriage Bolt Sets
Other Specifications
- 100% Virgin Grade Polyethylene Material
- 0.15″ Nominal Wall Thickness
- Solid EPS Foam-Filled Core
- 1/4" galvanized steel angles, corners & washer plates
- Includes float mounting hardware (lags & custom washers)
- Compatible with wood or composite decking
- Designed for 2" × 6" pressure-treated framing lumber, with joists at a max of 16" on center
- Framing and decking not included
DIY Kits Overview:
DIY Assembly Guide
Not sure where to start? Check out our DIY Dock Assembly Guide. No two projects are exactly alike, but our step by step guide will walk you through the foundational aspects of building your dock.
Still have questions or stuck on a step? Don't hesitate to contact us. We're happy to help!
Don't Forget Connection
Each module of your dock will need to be connected. Purchase one dock connector kit per connection point.
Dock Connection Kit
$148.98
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Quality Products or Your Money Back
Every product we sell is backed by a 10-15 year manufacture warranty. If you have any product issues or need replacements, we want to hear from you.
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We're Here to Help
Contact our Team for SupportLooking for a product, have an order issue, or just a quick question on delivery?
Disclaimer:
The Dock Shop disclaims all responsibility for the accuracy, completeness, or functionality of all the information provided in this listing. The Dock Shop assumes no liability. The information is provided "as is" without guarantees, or representations of any kind, either express or implied, including but not limited to, the accuracy, completeness, or suitability of this information for any particular purpose. All advertised freeboard may vary due to lumber weight and environmental factors. It is the sole responsibility of the user to ensure the proper and safe design, construction, and maintenance of the dock. Users must comply with all local, state, and federal regulations, building codes, and safety standards. We strongly recommend consulting with a qualified professional, such as an engineer or contractor, for advice and assistance with the design and construction of the dock.