How to Install PVC Fencing - Step-by-Step Guide

What You'll Need

Step 1 - Plan Your Fence Line

Before you dig anything, plan the full fence line.

1. Mark your boundary - use survey pegs or check your property title if unsure
2. Identify obstacles - trees, pipes, cables, slopes
3. Mark gate positions - decide where gates go before setting posts
4. Calculate post positions - posts go every 2.44m (one per panel set)
5. Check for underground services - call Dial Before You Dig (1100) before digging

Step 2 - Set Your String Line

A straight fence starts with a straight string line.

1. Drive a stake at each end of the fence line
2. Run a string line between the stakes at the height of your post tops
3. Pull the string tight - any sag will result in a crooked fence
4. Check the string is level using a spirit level
5. Mark post positions along the string line every 2.44m

Step 3 - Dig Post Holes

Post hole depth depends on fence height:

Rule of thumb: Post hole depth = one third of total post length.

Add 50mm of gravel to the bottom of each hole for drainage. This prevents water pooling at the post base.

Step 4 - Set Your Posts

This is the most critical step. Get the posts right and the rest is easy.

1. Place 50mm of gravel in the bottom of each hole
2. Lower the post into the hole
3. Check the post is plumb (vertical) in both directions using your spirit level
4. Brace the post with temporary stakes if needed
5. Mix concrete to a stiff consistency
6. Pour concrete around the post, filling to 50mm below ground level
7. Slope the concrete away from the post at the top to shed water
8. Check plumb again before the concrete sets
9. Allow 24 hours for concrete to cure before installing panels

Step 5 - Install Fence Panels

Once posts are set and concrete has cured:

1. Slide the bottom rail of the first panel into the post channel
2. Check the panel is level
3. Slide the top rail into the post channel
4. Secure with the provided clips or screws
5. Repeat for each panel along the fence line

Panel alignment: Each panel should be level and at a consistent height. Use a string line along the top of the panels to check alignment as you go.

Cutting panels: If you need to cut a panel to fit, use a fine-tooth saw. Cut from the back face to avoid chipping the front surface.

Step 6 - Install Post Caps

Post caps finish the fence and prevent water ingress into the post.

1. Apply a small amount of PVC adhesive to the inside of the cap (optional but recommended)
2. Press the cap firmly onto the post top
3. Tap down with a rubber mallet if needed

Step 7 - Install Gates

Gate installation requires careful post alignment. Gate posts must be perfectly plumb and set at the correct width for your gate kit.

1. Set gate posts first - before any other posts in the gate opening
2. Check gate post spacing - measure the gate kit width and add 20mm clearance
3. Ensure posts are perfectly plumb - even a small lean will cause the gate to swing open or closed on its own
4. Allow concrete to fully cure - 48 hours minimum before hanging the gate
5. Attach hinges - follow the gate kit instructions for hinge placement
6. Hang the gate - check swing clearance and adjust hinges as needed
7. Install latch - adjust latch position so gate closes securely

Common Mistakes to Avoid

DIY vs Professional Installation

Frequently Asked Questions