Corrugated Metal Raised Bed

A sleek, long-lasting raised bed with corrugated metal sides and wood corner posts. Deep sides give roots plenty of room.

Estimated time

2 – 3 hours

Lifespan

15–25 years

Soil needed

~38–45 cubic feet (about 1.4–1.7 cubic yards) if filled to 12–14 inches

Weight empty

80–120 lbs

Weight full

2200+ lbs

Best for

Modern look, deep-rooted crops, and keeping out burrowing pests

Placement

Set on bare dirt or compacted gravel, never a wood deck — a full bed weighs well over a ton. In hot-sun regions the south-facing metal wall can heat the soil; a wood top cap and keeping the bed full help, and light-colored metal stays cooler than raw rusted steel.

Close-up of a corrugated metal raised bed corner with wood cap and post — Wood-capped corner detail

A finished corrugated metal raised bed with lettuce and vegetables — Finished corrugated bed

Corrugated metal raised bed growing tomatoes and lettuce in a backyard — Tomatoes and lettuce in a metal bed

Boards to Buy

Boards to Buy	Quantity	What You Use Them For
Corrugated metal panels, 4×8 ft	2	Cut into 17-inch strips for the long sides
Corrugated metal panels, cut to 17×48 inch	2	Short ends
4×4 cedar posts, 8 ft	2	Corner posts cut to 20 inch
2×6 cedar boards, 8 ft	2	Top cap rails
Self-tapping metal screws, 1 inch	32	Attach metal to posts

·Landscape fabric or hardware cloth for the bottom
·Exterior wood screws, 2.5 inch
·Wood sealant or stain

Steps

1Cut the 4×4 posts into four 20-inch corner pieces.
2Cut two 4×8 metal sheets into 17-inch strips. You’ll get four strips total: two for the long sides and two for the ends.
3Attach the long metal panels to two opposite posts with self-tapping screws.
4Attach the short end panels to complete the rectangle.
5Add a 2×6 top cap around the rim, mitering the corners. This covers the sharp metal edge and protects the wood posts.
6Line the bottom with hardware cloth if voles are an issue, then landscape fabric.
7Set the bed on level ground.
8Fill with a mix of topsoil, compost, and coarse sand to 12–14 inches deep.
9Plant and water thoroughly.

Tools needed

·Circular saw or miter saw
·Metal snips or angle grinder with metal blade
·Cordless drill / driver
·Tape measure and level
·Work gloves and safety glasses — cut metal is vicious

Common mistakes to avoid

·Standing a 4×8 sheet upright as a full-height wall — the panels are cut into 17-inch strips
·Thin HVAC-style metal that dents or rusts fast — use 26-gauge galvanized or Corten
·No top cap — sharp edges are dangerous
·Screws too short — use exterior-grade self-tapping metal screws
·Forgetting to line the bottom if voles are a problem

Maintenance tips

Touch up scratches on galvanized steel or the cuts will rust. Tighten screws each spring. Add compost annually to maintain soil level.

Community builds

See how other gardeners built their corrugated metal raised bed — and share photos of yours.

Build photos: 0 / 2 used

Upgrade

Paid plans include more build photos.

My Corrugated Metal Raised Bed notes

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