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How To Install Deck Posts

In this tutorial we’ll be showing you how to install deck posts. We are working with the 4 x 4 Classic Deck Post, but the same process applies to all of our deck post sizes and styles.

Read the guide below, or check our our installation video.

Supplies Needed

3-1/4-Inch Flat Head Square Drive Deck Screws
Amount: 9

Deck Posts
Amount: 6

Tools Needed

Miter Saw
Cordless Screwdriver
Tape Measure

Determining the Deck Post Length

We recommend beginning by laying out all the components needed for the rail section. This usually proves to be easier than measuring and doing the math. The objective here is to determine the deck post length based on the railing height.

How to Install Deck Posts

This is showing the top section. 3” is an ideal number for the top and bottom.

How to Install Deck Posts

3” on the top, top handrail, lattice strip, 32” spindle, bottom handrail, 3” bottom gap, deck board, and the joist. For this project the measurement was 48 ¼”. Let’s make it 48” even because we really don’t want the post showing past the bottom of the joist.

Cutting the Posts

Save time by laying the post in a similar fashion, then cut them one by one on the miter saw.

How to Install Deck Posts - Cutting the Posts

Installing the Posts

For this method, simply lay the post in the corner and screw from the outside of the joist into the post. Compared to notching the post, this results in better structural stability. Local building codes can play a factor in notching the post, so be sure to check them if you’re unsure.

How to Install Deck Posts - Installing the Posts
How to Install Deck Posts - Installing the Posts

Deck Boards

After all the posts are in place, it’s time for deck boards. At this point, don’t fasten the boards to the joists. Simply lay them on top so they can be easily removed and stained.

How to Install Deck Posts
How to Install Deck Posts

Have any additional questions about deck post installation? Feel free to contact us!


Additional Resources

Deck Products Faq's

Frequently Asked Questions

We offer answers to our most frequently asked questions regarding deck, railing, baluster and spindles.

Baluster Calculator

Easily determine the perfect space between railing spindles and figure out how many you’ll need with our convenient baluster calculator.

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