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Spring is the best time to build outdoor furniture from cedar. The wood is stable after winter storage, temperatures are ideal for glue and finish to cure, and you can get two full seasons of use before you need to recoat. Western red cedar and aromatic eastern cedar both resist rot and insects without pressure treatment, but they are soft, split easily, and cost 2-3x more than pine or spruce. If you plan for that softness up front, cedar builds go fast and last 10-15 years outside with minimal maintenance.
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Contents
Why Cedar Makes Sense in Spring
Cedar’s natural oils (thujaplicins) make it decay-resistant, which means you don’t have to soak it in film-forming finishes to keep it from rotting. You can leave it to weather to silver-gray, or oil it to hold the reddish-brown color. In spring, daytime temps of 50-75°F and moderate humidity are perfect for both options. Most exterior oils need 48 hours above 50°F to cure properly, and water-based cedar outdoor wood finish will blush or peel if applied in summer heat or fall damp.
The trade-off is strength and price. A clear 5/4 x 6 cedar deck board runs $2.50-$4.00 per linear foot right now, while a 2×4 cedar stud is $8-$12 for an 8-footer. Knots are common in cheaper stock and they will bleed and crack. Buy 15-20% extra and cull boards with large, loose knots, especially for seat slats and armrests. Predrill everything within 1-1/2″ of board ends — cedar splits far more easily than pine, and a split at a screw line ruins a $20 board.
For fasteners and glue, use only stainless steel or hot-dipped galvanized screws (1-1/4″ to 2-1/2″ depending on joint) and a true exterior glue. Standard PVA will fail after one wet winter. An exterior waterproof wood glue rated Type I or Type II is worth the extra $4 because cedar joints move a lot with seasonal humidity.
1. The Two-Hour Cedar Garden Bench
This is the best starter spring project if you want usable furniture this weekend. It’s two 4×4 legs per side, a 2×4 frame, and 5/4 deck boards for the seat and back. No curves, no mortises.
Cut list for a 48″ bench: four 16″ 4×4 legs, two 48″ 2×4 long aprons, two 14″ 2×4 short aprons, plus seven 48″ deck boards (five for the seat, two for the back). Assembly is screws and glue only. Use 2-1/2″ screws for apron-to-leg joints, 1-5/8″ for deck boards, and leave 1/4″ gaps between seat boards for drainage.
Failure mode to avoid: racking. Without diagonal bracing, a bench with only butt-jointed aprons will wobble after a few months. Fix it by gluing and screwing a 14″ 2×4 stretcher 6″ up from the floor on each end, or adding corner blocks from scrap. Total lumber cost: $90-$140. Tools needed: miter saw, drill/driver, sander. You can build it on a patio with two sawhorses.
2. Classic Adirondack Chair, Revised for Cedar
An Adirondack looks complex but it’s just a series of flat templates. Cedar is ideal here because it’s light — a finished chair weighs 28-35 lbs vs 45+ lbs in pressure-treated pine — and it won’t give you splinters as fast in bare feet.
Expect 6-8 hours for your first chair, 3-4 hours for the second. You need about 30 linear feet of 5/4 x 6 cedar, usually sold as six 8-foot boards. Budget $120-$180 in cedar. The key dimensions: back slats at 34-36″ long with a 15-degree fan, seat height 14-15″ at the front edge, armrests 24-28″ wide for a real arm rest, not a perch.
Cedar-specific tip: don’t use a jigsaw with an aggressive wood blade for the curved back slats and arms — it tears the soft grain. Use a 10-14 TPI clean-cut blade and sand to the line with 80-grit. And seal the end grain twice. End grain on cedar wicks water at 10x the rate of face grain. One coat of finish on end grain is effectively no coat.
3. Cedar Planter Bench Combo
If you want furniture and a spring planting project in one, the planter bench solves both. Two 16″ x 16″ planter boxes with a bench seat spanning between them. It’s popular because it doesn’t need to be perfectly level — each planter sits independently.
Build each planter as an open box from 1×6 cedar, 15-1/2″ tall, with a 3/4″ plywood bottom drilled for drainage (five 1/2″ holes minimum) and lined with landscape fabric, not plastic. Plastic traps moisture and rots the bottom in two seasons. Span the boxes with three 2×4 cedar joists and top with deck boards. Overall length ends up 68-72″.
Lumber: twelve 6-foot 1x6s plus three 8-foot 2x4s. Cost $140-$200. This project uses more material but almost no joinery beyond screws. The weak point is soil contact. Keep the boxes off the ground with 1/2″ plastic feet or small cedar cleats, otherwise the bottom 2″ will stay wet and decay even in cedar.
4. Simple Cedar Outdoor Dining Table
A 30″ x 60″ slatted dining table is the most useful build if you already have seating. It’s also the one where cedar’s softness matters most. A 1x top will dent from plates and cups.
Build the base from 4×4 cedar legs and 2×4 aprons with pocket screws or lag bolts, then use 5/4 deck boards for the top to get a 1″ thick, dent-resistant surface. Allow 1/4″ gaps between top boards — a solid glued top will crack outdoors as cedar expands 1/8″ to 1/4″ across its width from dry August to wet April. Breadboard ends look nice but will split if you glue them solid. If you want them, attach with elongated screw slots, not glue.
Cost is $180-$260 for cedar alone. You’ll need a pocket hole jig kit if you want hidden apron joints, or you can through-bolt with 3/8″ x 3-1/2″ carriage bolts for a more rustic look that is actually stronger. Plan for 8-10 hours including sanding to 120 grit. Sanding past 150 grit is wasted on soft cedar — the next dent will show through anyway.
How to Choose Your First Spring Build
Pick based on time, shop tools, and how much you want to spend on wood you might miscut. This comparison assumes standard 5/4 x 6 Western red cedar deck boards and basic dimensional cedar from a home center, not clear heart grade.
| Project | Skill Level | Build Time (First Time) | Cedar Needed | Typical Lumber Cost | Key Tools Beyond Drill/Saw |
|---|---|---|---|---|---|
| Garden Bench | Beginner | 2-4 hours | 45 lin. ft. | $90-$140 | None |
| Adirondack Chair | Intermediate | 6-8 hours | 30 lin. ft. + 1x stock for arms | $120-$180 | Jigsaw, router or sander for curves |
| Planter Bench | Beginner-Intermediate | 5-7 hours | 70 lin. ft. (mostly 1×6) | $140-$200 | None |
| Slatted Dining Table | Intermediate | 8-10 hours | 55 lin. ft. + 4×4 legs | $180-$260 | Pocket jig or ratchet for bolts, sander |
If you own only a circular saw and drill, start with the garden bench or planter bench. If you have a jigsaw and a sander and want to practice curves, the Adirondack is more rewarding but less forgiving of layout errors. The dining table is not harder, just bigger — you need space to assemble a 60″ top flat and carry it without twisting.
Finishing Cedar So It Lasts
You have three honest options, and all are valid:
1. Let it gray. Do nothing. Cedar will turn silver in 6-12 months. You’ll get checking and surface fuzz, but no rot for years if you keep it off wet ground. Zero maintenance, fastest to build.
2. Penetrating oil with UV protection. A one-coat exterior oil with iron oxide pigment (look for “cedar tone” or “natural”) cuts graying by 70-80% and needs recoating every 12-18 months in full sun, every 24 months in shade. Apply thin — cedar does not absorb heavy film finishes well and they will peel.
3. Exterior spar varnish or film finish. Not recommended for horizontal surfaces like seats and tabletops. It looks great for one season, then cracks at the gaps and traps water. If you want gloss, reserve it for vertical pieces like chair backs.
Whatever you choose, do it in spring before pollen season peaks. Pollen sticks to wet oil and is miserable to sand out. Finish all sides and especially end grain before assembly where you can. Once assembled, water sits in screw holes and end-grain butt joints — that’s where decay starts, even on cedar.
Spring Build Checklist
Dry-fit everything in the garage, then carry it out for final assembly — cedar dents when dragged across concrete. Predrill with a countersink bit so screws sit just below the surface; proud screws tear clothing and hold water. Keep a bottle of exterior glue at 60°F or warmer overnight before use, and don’t glue if rain is expected within 3 hours. With those details handled, any of these four projects will be ready for finish and outdoors by the weekend, and you will know quickly which style you want to build more of for summer.