Turn Your Garden Shed into a Greenhouse with Fiberglass Panels

Transforming a wooden shed into a full or partial greenhouse is surprisingly straightforward using corrugated fiberglass panels. Lightweight, durable, and translucent, they admit ample light for seed starting or overwintering tender plants.

Two Approaches: Full or Partial Conversion

Full greenhouse: Replace all roofing and siding with fiberglass panels. The structure becomes a light-filled growing space year-round.

Mini greenhouse: Panel just one roof section and the adjacent wall. The rest of the shed remains dry storage or a potting area—best of both worlds.

Installation Essentials

• Cut panels with a fine-tooth carbide blade (plexiglass/fiberglass rated).
• Use specialized screws with rubber grommets to prevent leaks and cracking.
• Overlap panels side-to-side and top-to-bottom for weatherproofing.
• Attach panels to 1×4 purlins screwed perpendicular to rafters/studs.
• Pre-drill every hole to avoid stress fractures.

Insulate the Growing Zone

Staple clear 6-mil polyethylene to the interior wall studs of the greenhouse section, then secure with lathe strips. The resulting dead-air space boosts insulation, and the plastic is easily replaced when it degrades.

With a weekend's work, you'll gain a protected growing environment that extends your season by months.