What's inside
As an Amazon Associate I earn from qualifying purchases. This post may contain affiliate links at no extra cost to you.
A wooden garden sign is a useful first routing project: the workpiece is small, the lettering can be simple, and mistakes are usually repairable. The main challenge is not cutting the letters. It is choosing stable wood, laying out readable text, and controlling the router so the background stays flat and clean.
Contents
Project overview
This sign uses a 1-by-10 board, approximately 3/4 inch thick, with lettering routed 1/8 to 3/16 inch deep. A finished sign about 8 by 24 inches is large enough for a garden name, “Herbs,” or a short welcome message without becoming awkward to mount. Plan on two to four hours, excluding drying time.
| Material | Advantages | Drawbacks | Best use |
|---|---|---|---|
| Cedar | Light, naturally weather-resistant, easy to rout | Soft fibers can tear; dents easily | Outdoor signs and beginner projects |
| Exterior plywood | Flat, affordable, stable across seasons | Edges need sealing; veneers can chip | Painted signs with a clean border |
| Pine | Cheap and widely available | Moves and dents; knots can bleed through paint | Low-cost signs under cover |
| Hardwood | Sharp detail and a premium appearance | More expensive and slower to rout | Decorative signs protected from weather |
For most outdoor projects, cedar is the easiest choice. Buy a board that is dry, straight, and free of loose knots. A cheaper pine board is fine if the sign will hang under a porch and you are willing to fill knots and repaint it periodically.
Tools and materials
You need a board, measuring tools, sandpaper from 120 through 220 grit, exterior paint or stain, and an exterior clear finish. For routing, use a compact or full-size router with a 1/4-inch straight bit. A plunge router makes starting and stopping inside letters easier, but a fixed-base router also works if you drill entry holes first.
A 1/4-inch straight router bit is the practical all-purpose choice. A 1/8-inch bit produces finer lettering but breaks more easily and demands slower, more careful movements. You will also need clamps, a shop vacuum, eye and hearing protection, and a printed lettering template. Use a router edge guide only for straight borders; it is not necessary for freehand letters.
Prepare the board
Cut the board to length with a handsaw or circular saw. Add at least 1 inch to your planned length if you want to trim both ends after routing. Check the board with a straightedge. A cup or twist greater than about 1/8 inch over 24 inches makes consistent routing difficult, especially with shallow lettering.
Sand the face with 120-grit paper, then 180-grit. Do not polish the surface to 220 grit before routing; a slightly abraded surface gives layout pencil and transfer paper something to grip. Ease the corners with two or three sanding strokes. Sharp corners shed finish and are more likely to split.
Lay out the lettering
Keep the message short. Letters at least 2 inches tall are much easier to read from a path than small script. Print the words at full size using a bold, uncomplicated font. Thin serifs and delicate script fill with paint and are difficult to follow with a router.
Draw a centerline along the board and position the paper template with painter’s tape. Transfer the outlines with carbon paper, or trace around the letters using a sharp pencil. Mark the waste areas clearly. For a beginner, carving the letters themselves is usually easier than routing around raised letters, because the router remains on the background surface.
Before routing the sign, practice one or two letters on a scrap of the same wood. This reveals how quickly the grain tears and whether your chosen depth is readable. Set the router depth to 1/16 inch for the test, then increase to 1/8 inch or 3/16 inch if the shadow is too faint.
Route the letters
Clamp the board to a sturdy bench with the lettering facing up. Keep clamps outside the router’s travel area. Set the router speed according to the bit manufacturer’s guidance, and make sure the collet grips the bit at least 3/4 inch. A loose bit can climb out during the cut.
Start with shallow passes. On soft cedar, remove no more than 1/16 inch per pass. On pine or hardwood, use two or three passes rather than trying to reach final depth at once. Move the router slowly enough to keep the bit cutting, but not so slowly that it burns the wood. A dark scorch mark usually means a dull bit, excessive speed, or lingering in one spot.
For enclosed areas such as the center of an “O,” drill a 1/4-inch starter hole inside the waste before lowering the bit. Keep both hands on the router and route in a controlled direction. If the bit catches and pulls, stop, lift the router, and inspect the cut instead of forcing it. Vacuum dust frequently; packed chips hide the letter edges and increase heat.
Do not try to make every corner perfectly square with the router. Clean tight corners with a sharp chisel or utility knife after routing. On softwood, light scraping is safer than aggressive chiseling, which can pull out a chunk of end grain.
Sand and finish the sign
Brush or vacuum the routed grooves, then lightly sand the broad face with 180-grit paper. Fold the paper and sand the groove bottoms by hand only if they feel rough. Over-sanding can soften the letter edges, making the lettering look blurred.
For high contrast, brush exterior paint into the letters first. Let it dry, then sand the face lightly with 180 or 220 grit until paint remains mainly in the recesses. This “paint and sand” method works well, but it can expose bare wood around the letters, so apply a second coat or seal the whole sign promptly.
Alternatively, stain the entire sign and use a small brush to paint the lettering. This is slower but gives better control on cedar. A small exterior paint brush set is sufficient; expensive artist brushes are unnecessary for one sign.
Seal every surface, including the end grain and routed recesses. Use two or three coats of exterior spar urethane, outdoor paint, or an exterior wood sealer, following the recoat times on the container. Lightly sand between coats when specified. The cheapest finish is acceptable for a seasonal sign, but a sign exposed to rain needs sealed edges and annual inspection.
Mount and maintain the sign
Drill two mounting holes at least 2 inches in from each end to reduce splitting. Use galvanized or stainless screws; ordinary steel screws quickly leave rust streaks outdoors. If mounting to a post, leave a small gap between the sign and the post so water can drain and air can circulate.
After the first wet season, inspect end grain, corners, and the bottoms of the routed letters. Touch up exposed wood before it darkens or cracks. If the board cups badly, the problem was usually wet lumber, inadequate sealing, or fastening it too tightly while it was still changing moisture content.