GuidePergolas & Gazebos
Build a Trellis Privacy Screen for a Patio or Garden
A trellis screen blocks a direct view into your patio without the closed-in feeling of a solid fence. Within a season or two, climbing plants turn it into a green wall. This guide builds one sturdy panel between two posts; add more panels to make a longer screen.
What you will build
Two posts are set in the ground or on post anchors, and a frame of rails holds a lattice panel between them. The frame stiffens the lattice and gives it a neat edge, so it looks finished even before plants grow up it.
A screen catches wind like a fence, so the posts need a firm footing. Keep the height modest (around 6 ft or 1.8 m) and check local rules, because many places limit the height of fences and screens, especially near a boundary or a road.
Real-world examples
Photos of similar builds by other people, shared under open licenses. They show the idea in practice; the details differ from this guide.
Materials
- 2 posts, about 4 × 4 in (95 × 95 mm), rated for outdoor or ground contact use
- Post anchors (bolt-down for paving, or concrete-in) or concrete and gravel for setting the posts
- 2 × 3 in (45 × 70 mm) timber for top and bottom rails
- 1 × 2 in (20 × 45 mm) battens to frame the lattice
- 1 lattice or trellis panel to fit the opening
- Exterior screws and post brackets
- Climbing plants and a bag of compost
Tools
- Tape measure and string line
- Spirit level and post level
- Post hole digger or spade
- Saw
- Drill/driver
- Clamps
- Safety glasses and gloves
Step by step
1Mark the post positions
Decide where the screen goes and mark the two post centres so the lattice panel fits between them with its frame. Run a string between the marks so the posts end up in a straight line.
2Set the posts
Before digging, check where underground cables and pipes run. Set the posts in holes on a few inches of gravel and fill with concrete, or bolt them to post anchors on a firm base. Hold each post plumb on two faces with temporary braces until the concrete has set.
3Fit the rails
Screw the bottom rail between the posts a few inches above the ground so it stays dry, and the top rail at the height of the panel. Use post brackets or screw at an angle through the rail into the posts, and check that both rails are level.
4Frame and fix the lattice
Screw battens to the inside of the posts and rails on one side to form a rebate, place the lattice panel against them, then add a second set of battens on the other side to sandwich it. Screw through the battens, not through the thin lattice strips, so they do not split.
5Finish the tops
Cut the post tops square, or add post caps so rain does not soak into the end grain. Treat or paint any untreated wood before the plants cover it, because it is hard to reach later.
6Plant the climbers
Dig a planting hole about a foot (30 cm) out from the screen, where rain can reach the roots, and lean the plant toward it. Tie the first shoots loosely to the lattice and keep the plants well watered in their first summer.
Tips for a better result
- For quick cover, combine a fast annual climber such as sweet peas or runner beans with a slower perennial.
- Evergreen climbers give privacy all year; deciduous ones let in winter light.
- Leave a gap of an inch or two between the bottom rail and the ground so it does not rot.
- Choose climbers suited to your hardiness zone and the amount of sun the screen gets.
Common mistakes to avoid
- Setting the posts too shallow, so the first storm leans the screen over.
- Screwing straight through the lattice strips, which split easily.
- Planting climbers right at the base, in the dry shadow of the screen.
- Choosing a vigorous climber that will outgrow and pull down a light trellis.
Safety
- Locate underground services before digging post holes.
- Wear gloves and eye protection when mixing and pouring concrete.
- Check local height limits and talk to neighbours before building on a shared boundary.
General guidance only. Follow the instructions for your tools and materials and your local rules, and use a qualified professional for electrical, gas and structural work.
Finishing up
A trellis screen is one of the quickest ways to make a patio feel private and green. Tie in new growth every few weeks during the first season, and you will soon have a living wall that gets better every year.
About this guide: written by the DIY Outdoor Builds editors from general, widely used building and gardening practice. Text and illustration © DIY Outdoor Builds. Photos are by the people credited under each one, used under their licenses. Found an error? Let us know.
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