Loading

How To Build an Octagon Deck

The most important thing to be concerned with while building an octagon deck is to keep it level and square. We recommend to start by setting the prenotched posts at each corner positioned at a 22.5 degree angle. Between each of these posts, you will install double flush beams. Make sure each beam is the same length and equidistant to the opposite side. 

Octagon
PinterestSave


The perimeter framing will be flexible for you to adjust before adding additional framing. Use temporary supports to stabilize the frame while working. Once the deck perimeter is square and level, install joists using angled joist hangers to strengthen the octagon frame. Avoid installing joists to the corner intersections to prevent interfering with the post beam notch connections. Adding decking and bracing will improve the strength and structural stability of the octagon. 

If you are planning on installing a gazebo on top of the octagon, make sure your footings are sized to support the extra weight of the roof and that the gazebo is properly attached to the frame.

Popular Framing Articles
Deck Support Columns

How to Decorate Deck Support Columns

Browse some examples of decorative deck support posts for tall decks.

Deck Framing

Joist Tape: What Is It and Do I Need It?

Dive into the benefits of joist tape and why you need it for your deck build.

Deck Framing

Building Above Ground Pool Decks

Add that finishing touch to your above-ground pool with a customized pool deck. Learn the essential steps from planning and permitting to installation and maintenance. Discover tips on choosing materials, ensuring safety, and deciding between DIY and professional help for a seamless and stylish poolside experience.

Next Step: Decking Articles
Decking Installation

How to Install Decking Over Existing Concrete Slab, Patio, or Porch

Discover the best techniques to build a deck over concrete, ensuring proper drainage and stability, while creating a beautiful outdoor space.

Decking Installation

Introduction to Decking

Spacing between deck boards provides several critical functions, such as drainage & drying. Learn how to space and stagger deck boards at Decks.com.

Decking Installation

How to Install Composite Decking

Learn about how to install composite decking. Topics include expansion and contraction issues and hidden fastener systems.

Get more helpful resources delivered right to your inbox

Explore Articles by Topic

Popular Framing Articles
Deck Framing

Why is Joist Protection so Important for Your Deck?

If you’ve ever seen a piece of wood left out in the weather for any period of time, you know what happens: decay. Whether through wet rot, insect damage, or mildew, the fibers begin to break down.

Deck Framing

Using Shims to Level the Deck Surface

Install shims or notch joist bottom across uneven joists to level your deck surface.

Deck Framing

How to Brace a Swaying Deck

Learn how to install a diagonal brace on your deck frame to prevent racking. Check out our detailed image.

Next Step: Decking Articles
Decking Installation

What to Consider When Building A Wrap-Around Deck

Looking to add a wrap-around deck to your home but unsure of what the process involves? Check out this guide to learn more about top considerations when building a wrap-around deck.

Decking Installation

Deck Replacement & Repair Costs

Not sure whether to fix your old deck or tear it down? This guide explores the costs and pros and cons of repairing vs replacing your deck.

Decking Installation

Best Hidden Deck Fasteners

Hidden fasteners create a clean deck surface and can be used with composite, wood and other materials. Learn about hidden deck fasteners at Decks.com.

Get more helpful resources delivered right to your inbox

Explore Articles by Topic