Build sturdy paired garden gates by sizing posts, bracing diagonally, and aligning hinges and latches.
This guide walks from layout to tune-up so the two leaves meet cleanly and keep their line.
Project Snapshot And Planning Notes
Confirm the opening, slope, and swing. Sketch leaf width, ground clearance, and swing arc. Leave a 1/2 in center gap and 3/8–1 in at each post for seasonal movement.
If the barrier encloses a pool, use self-closing hinges and a high latch per safety rules, as outlined in the CPSC pool barrier guide.
| Part | Typical Size | Notes |
|---|---|---|
| Gate posts | 115mm x 115mm (4×4) or 140mm x 140mm (6×6) | Choose thicker posts for wider leaves or windy sites. |
| Rails (top/bottom) | 38mm x 89mm (2×4) | Use exterior-rated lumber; orient crowns the same way. |
| Stiles | 38mm x 89mm (2×4) or 38mm x 140mm (2×6) | Wider stiles add screw bite for hinges and latch. |
| Diagonal brace | 38mm x 89mm (2×4) | Runs from bottom hinge side up to opposite top corner. |
| Face boards | 19mm x 89–140mm (1×4–1×6) | Boards or slats set with small gaps for drainage. |
| Hinges | Strap, tee, or band & gudgeon | Pick size to match leaf width and weight. |
| Center latch | Drop bolt + cane bolt or double-sided latch | One bolt pins to ground; one bolt secures idle leaf. |
| Fasteners | Exterior screws, lag bolts | Hot-dip galvanized or stainless for treated or coastal use. |
| Finish | Oil, semi-transparent stain, or exterior paint | Follow product label for prep and recoat cycle. |
Materials And Tools
Choose decay-resistant lumber. Cedar and redwood work well; treated pine suits posts and frames. Match screws and bolts to outdoor use. Tools: saw, drill/driver, level, clamps, square, chisel, pencil.
Building Paired Garden Gates: Step-By-Step
1) Set Solid Posts
Gate posts carry the load. Dig holes three times the post width. Set depth near one third of above-grade height, deeper where frost or wind demands it. Add 150 mm (6 in) gravel, set posts, pour concrete with a shed slope. Check plumb from two sides while it sets.
2) Confirm The Opening And Leaf Size
Measure the clear space at hinge height. Subtract 25–50 mm for all gaps and divide by two for leaf width. Leave 25–40 mm under each leaf along its path.
3) Build Rigid Frames
Lay out each leaf flat. Cut stiles to height and rails to width minus stile thickness. Dry-fit, square, and fasten with exterior screws or bolts. Half-laps or pocket screws add stiffness; pre-drill for lags.
4) Add The Diagonal That Stops Sag
Run a brace from the lower hinge side to the latch-side top corner so it works in tension. Toe-screw into stiles and rails. A cable with a turnbuckle also works.
5) Skin With Boards
Fasten vertical boards with a small gap. Start at the hinge stile, keep edges aligned, and check square. A simple cap along the top rail sheds water.
6) Choose And Place Hinges
Strap or tee hinges spread load; band-and-gudgeon ride on a pin for heavy leaves. Size tee hinges near half the leaf width; many band sets near one third. Place hinges near the top and bottom rails; add a third at mid-height for big leaves.
7) Hang The Leaves
Block each leaf to its under-clearance, clamp, mark, and pre-drill. Mount post leaves first, then gate leaves. Test the swing and shim behind hinges as needed.
8) Lock The Center
Pick an idle leaf. Install a cane bolt near the bottom into a sleeve in concrete or a paver; add a second near the top rail in windy areas. Mount a latch on the active leaf. Keep the center gap narrow yet free for movement.
9) Add Stops And A Drip Cap
Thin stops on the idle leaf give a repeatable landing. A small cap along the frame’s top edge sheds water.
10) Finish And Seal
Ease sharp corners, clean dust, and brush on exterior stain or paint. Two thin coats beat one heavy coat. Back-prime boards if you choose paint.
Layout Tips For Smooth Operation
Mind The Grade
On rising ground, bevel the bottoms or hang the leaves higher. Snap a chalk line to find high spots before digging.
Keep Hardware In Line
Keep hinge barrels on one line. Sight with a straightedge or string. Set strap hinges over the brace path.
Control The Center Meeting
Bevel latch edges a few degrees so the leaves meet without rubbing while the front reveal stays tight.
Durable Materials: Wood, Fasteners, And Finish
Cedar and redwood resist decay; cypress works in many regions. Treated pine suits posts and frames near concrete or soil. Match fasteners: hot-dip galvanized or stainless with treated wood; stainless near salt air. See the AWC corrosion guidance on fasteners with treated wood.
Oil and semi-transparent stain peel less and refresh easily. Paint gives a crisp look when edges are sealed and boards are back-primed.
Hardware Choices And Sizing
Pick hinge style by weight and look. Strap and tee spread load on board-and-batten skins. Band-and-gudgeon fits heavy frames. Use latches with adjustable catches so you can re-set the bite after movement.
| Gate Width (per leaf) | Suggested Hinge Length | Notes |
|---|---|---|
| 600–800 mm (24–32 in) | 200–300 mm (8–12 in) | Light leaves; tee or strap. |
| 800–1000 mm (32–39 in) | 350–450 mm (14–18 in) | Mid-weight; tee at ~1/2 width. |
| 1000–1200 mm (39–47 in) | 450–600 mm (18–24 in) | Use a third hinge or band set. |
Clearances, Gaps, And Code-Sensitive Spots
Target a center gap near 12–20 mm and 10–20 mm at each post. Leave bottom clearance for snow or mulch. Around pools, use self-closing hinges and a high latch set by code.
Common Mistakes And Easy Fixes
No Brace Or The Wrong Angle
A brace from the top hinge to the low latch corner pushes joints apart. Flip it so the lower hinge connects to the high latch corner. For existing sag, add a cable and turnbuckle and retune after a week.
Too-Small Hinges
Short tee hinges lose force. Size up or add a third hinge. Heavy leaves favor band-and-gudgeon with long straps and big pins.
Weak Posts
Shallow embedment lets posts lean. Rebuild with deeper holes and a larger bell. Add gravel below concrete and slope the top away from wood.
No Idle-Leaf Anchor
Wind beats a lone latch. Add a cane bolt into a sleeve in a paver or small pad. Add a second near the top rail in gusty sites.
Maintenance And Seasonal Tuning
Wood moves with seasons. Twice a year, tighten screws, oil pivots, and re-set the strike. Lube hinge barrels with light oil each spring and fall. Wash dirt, spot-sand raised grain, and refresh finish before bare wood shows.
Cut List Example For A 10-Foot Opening
Sample for a 3048 mm (10 ft) opening: two leaves near 1470 mm (58 in), a 25 mm center gap, and 10–15 mm side gaps. Adjust to your opening and hardware.
Per Leaf
- Stiles: 2 pcs @ 1524 mm (60 in)
- Top and bottom rails: 2 pcs @ 1330 mm (52 3/8 in)
- Brace: 1 pc @ 1830 mm (72 in), trimmed to fit
- Face boards: 12–14 pcs @ 1524 mm (60 in), 1×4 and 1×6 mix
- Cap: 1 pc @ 1330 mm (52 3/8 in)
Hardware
- Hinges: 2–3 per leaf sized per table
- Latch: double-sided with adjustable catch
- Cane bolt: 1–2 pcs with sleeve
- Fasteners: exterior screws, lag bolts, anchors
- Finish: stain or paint rated for exterior wood
Safety Notes And When To Upgrade Hardware
Near pools, use self-closing hinges and a high latch. Near salt or with treated frames, pick stainless and avoid mixed metals. Wide drive leaves often need band-and-gudgeon with threaded adjusters.
Concrete Or Gravel Backfill?
Both work when done right. Concrete locks the post and resists side load; gravel drains and is easy to reset. For drive entries and wind, concrete around a gravel collar gives strength and drainage. Keep concrete a few inches above grade, troweled to a dome, so water runs away.
Hinge Layout At A Glance
Place the top hinge just under the top rail. Set the bottom hinge just above the bottom rail. A third hinge sits near mid-height. On band-and-gudgeon, set the pins plumb and at equal projection from the post face so the leaves share one swing axis. With strap styles, keep the long leaf over the brace line so the strap helps the brace carry load.
Weatherproofing Checklist
- Seal end grain on stiles, rails, and the brace tips.
- Back-prime face boards and any trim that sits flat.
- Caulk skinny cracks at joints before paint.
- Keep soil and mulch pulled back from the bottom edge.
Cost And Time Benchmarks
For a 3.0 m (10 ft) opening in cedar with strap hinges, plan a weekend for two people: day one for posts, day two for frames and hang. Costs vary by region; lumber, hardware, finish, and mix often land in the mid hundreds.
Wrap-Up: A Clean Close Every Time
Start with stout posts, square frames, a tension brace, and hardware sized to the span. Add a fixed idle leaf, a tuned latch, and a water-shedding finish. Give it two short tune-ups each year and the pair will keep a crisp close securely.