12x20 Gable Greenhouse Plan - Premium PDF | DIYCraft

Build a 12x20 timber greenhouse with a 27-degree gable roof, five opening window sashes and double doors on an anchored timber perimeter over a permeable gravel floor.

The complete 24-page Premium PDF contains 16 illustrated construction steps. Each step combines dimensioned drawings with a 3D assembly view. The two-page materials and cutting list includes timber, glazing, hardware and fasteners.

Wall frame: 144 x 240 in (12 x 20 ft; 240 sq ft).

Ground-contact 6x6 timber perimeter: 146 x 242 in.

Crushed-stone pad: 180 x 276 in, with a 6 in stone envelope over permeable geotextile.

Two glazed door leaves, 23.625 x 82 in each, with fitted brace details.

Five opening sashes with half-lap and glazing-rebate details.

Compatible 8 mm twinwall polycarbonate coverage and rough-stock guidance.

Printable A4 pages; feet and decimal-inch measurements.

The gallery previews show actual pages from this PDF: dimensions, timber base and double-door assembly. The garden cover illustrates the finished appearance; landscaping is not included.

Digital PDF only. No physical materials are supplied. This listing contains the Premium edition; there is no Free edition download.

Check local soil, frost, wind, snow, drainage and anchorage requirements before construction. Purchased hardware is schematic. Adjust glazing to the selected manufacturer's profiles and movement allowances. Site-specific structural capacity and full hinge travel are not established; obtain qualified local review where needed.

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