Greenhouse Library

The glass in a real greenhouse isn't window glass. Why it's tempered safety glass, why you can't cut it, and how glass compares to polycarbonate for the walls.

When a standard greenhouse isn't big enough. How custom Janssens builds and the Gigant work — sizing, doors, foundation, and why these start with a phone call.

Thinking about a wood greenhouse instead of aluminum? How cedar holds up, what the Alton Cheltenham gets right, and who a wooden greenhouse is really for.

Sliding or hinged greenhouse doors? Compare install difficulty, thresholds, and knee-wall fit — plus why hinged doors are best ordered with the greenhouse.

Growing through hard winters? How glazing, foundation depth, and ventilation make a greenhouse survive heavy snow and cold — and hold heat for year-round growing.

Comparing Janssens Royal Victorian greenhouses: VI23, VI34, VI36, and VI46 by size, doors, and roof vents — plus the door-placement detail buyers miss.