Key Steps and Tips for Installing Your Gate

Thinking about adding a gate to secure your property and enhance your outdoor space? Before you buy, taking accurate measurements is crucial. This guide walks you through how to measure for your gate, choose the right style (swing or sliding), and avoid common mistakes.

1. Measure the Width Between the Posts

Measure the inside distance between the two posts at three different heights:

A

Top

B

Middle

C

Bottom

Why three measurements? Posts may not be perfectly parallel—especially on older installations or if they've shifted over time.

Record the smallest of the three measurements—this is your usable gate width.
If the difference between measurements is more than 1/2 inch, check that your posts are plumb before installing. For example: If you measure 119.3" at the top, 118.5" in the middle, and 118.9" at the bottom, use 118.5" as your width.

2. Measure the Height from Ground to Underside of Post Cap

Next, measure the total available height from the finished ground level to the bottom of the post cap (or post cover).

• • Measure on both sides, as the ground may slope.
• • The final gate height should be 2 to 4 inches less than the available height to allow clearance for hinges and opening.

Make sure the rack and gate motor will fit without interfering with the gate height.

4. Check That the Ground Is Level

The ground should be flat and level across the entire gate width.
If there's a slope:

• • You can open the gate outward (if allowed by local regulations),
• • Or choose a custom model with adjustable hinges or an asymmetrical swing gate (one leaf narrower than the other).

Pro tip:
Use a spirit level or laser level to spot any height differences.
A slope greater than 3/4 inch per 3 feet can cause problems when opening the gate.

In Summary:

Measure the width between your posts at three heights (top, middle, bottom).
Note the available height from the ground to the post cap, allowing 2 to 4 inches of clearance.
Check that the ground is level and the posts are plumb before installation.
Consider gate automation at the measuring stage to avoid surprises during installation.
Choose your gate style to fit your property: swing gates for wide, straight entries; sliding gates for tight spaces or sloped ground.

If you're unsure, hire a professional to take on-site measurements—it's the best way to ensure a perfect fit.