Building a lattice fence means constructing a freestanding wooden frame to hold the lattice panel, setting 4×4 posts in concrete, and mounting the framed panels with weather-resistant screws left slightly loose to allow for expansion.
Lattice fences add privacy without blocking all the light, but the real trick is getting the frame square and keeping the panel off the ground. If you overtighten the screws or set the lattice directly on soil, you will be rebuilding in two years. Here is the exact sequence that works for pressure-treated wood and standard US lumber sizes.
Planning, Codes, and Post Layout
Before you dig, check your local fence height limits and HOA rules—many jurisdictions restrict lattice tops above a solid fence to 6 feet total. Mark your fence line with string and stakes, spacing posts 6 to 8 feet apart on center. For a 6-foot wall with a 12-inch lattice cap, one post length option is wall height plus 30 inches for the hole plus the lattice panel height; that gives you a total length you trim to final height later.
Corner and gate posts need 30-inch-deep holes; line posts work at 24 inches. The hole diameter should be 6 to 10 inches—wide enough to fit the post plus a bag of quick-setting concrete. If you aren’t sure what kind of lattice suits your project, check our tested roundup of lattice fence panels for gardens to match the material and style to your yard before buying.
Setting the Posts
Set 4×4 or 6×6 pressure-treated posts in 75-pound bags of quick-setting cement—roughly one bag per hole for a standard 10-inch hole. Drop the post in, pour the dry mix, add water, and brace it perfectly plumb before the concrete sets. Wait the full cure time (check the bag for temperature and humidity ranges) before attaching any frame; moving a panel onto a wet post guarantees a crooked fence.
After the concrete cures, the post stands solid and ready for the framed panel. You will trim the top after mounting, so leave it a few inches taller than needed for now.
Building and Assembling the Lattice Panel Frame
Cut 1×2 or 2×2 pressure-treated lumber into a four-sided frame that matches the inside opening between your posts. A miter saw makes clean 45-degree corners for a picture-frame look, though butt joints work too if you reinforce them with exterior wood glue. Check every corner with a speed square before driving 2.5-inch deck screws—if the frame is out of square, the lattice will buckle.
Cut the lattice sheet to size with a circular saw. Vinyl panels need a vinyl-cutting blade to avoid chipping; wood lattice takes a standard wood blade. Leave a small expansion gap—roughly ¼ inch—around the edges. Lay the lattice on the back of the frame and secure it with 1-inch screws or narrow crown staples every 6 to 8 inches. Trim any lattice that sticks past the frame edges so the panel sits flush.
Mounting the Panels and Avoiding Rot
Position the framed panel between the posts, keeping it level and exactly 1 inch off the ground—that gap is what stops moisture wicking up into the wood. Pre-drill through the frame into the post at lattice crossing points (those are the strongest spots). Drive 2.5-inch or 3-inch weather-resistant screws with washers, but stop while they are still snug—overtightening cracks the lattice slats and prevents natural expansion. Space screws every 12 to 18 inches along all supported edges.
When multiple panels sit side by side, keep a ¼-inch gap between them for the same expansion reason. After every panel is mounted, trim the post tops with a reciprocating saw and install post caps to shed water away from the end grain.
Common Mistakes at a Glance
| Mistake | Why It Fails | The Fix |
|---|---|---|
| Overtightening screws | Splits lattice slats under pressure | Leave a washer snug, never cranked |
| Lattice touching ground | Rots frame in one season | Keep a 1-inch clearance from soil |
| Skipping expansion gaps | Panels warp or buckle in heat | ¼-inch gap between panels and trim |
| Framing out of square | Lattice buckles or gaps appear | Square with speed screw before screwing |
| Wrong blade for vinyl | Chips and cracks vinyl surface | Use a vinyl-cutting blade |
FAQs
What size lumber should I use for the frame?
1×2 or 2×2 pressure-treated lumber works for standard lattice panels. Use 2×6 if the panel spans a wide gate opening and needs more rigidity to prevent sagging over time.
Can I attach lattice directly to existing posts without a frame?
Screwing a lattice sheet straight to posts leaves the edges unsupported and prone to cracking at the fixing points. A full perimeter frame distributes the load and keeps the lattice flat for years.
Do I need to seal or paint the wood before mounting?
Sealing the frame and posts before assembly protects cut ends and corners that become inaccessible after mounting. It is easiest to apply a coat of exterior stain or paint before you install the lattice.
References & Sources
- Bunnings. “How to Install a Lattice Fence.” Detailed post-setting and panel framing procedures covered in the brief.