Deck Posts Installation

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
Deck Posts
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.

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

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. 

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.

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.