Lancing Cedar Greenhouse by Alton

Lancing Cedar Greenhouse by Alton FAQ — Everything You Need to Know

Why choose a cedar-framed greenhouse over aluminum or polycarbonate?

Cedar gives you the classic Victorian glasshouse look with real wood glazing bars, but the Lancing avoids the usual downside of wood — ground rot — by sitting the whole frame on a standard aluminum base, so it never touches soil directly.

What size should I get?

All three sizes share the same 10'9\" width and 11'1\" peak height — the only variable is length (16'8\", 18'0\", or 20'10\"). If you're growing more than a hobbyist's worth of tomatoes and herbs, or want room for a potting bench along one wall, size up to the 10x18 or 10x20.

Do I need a foundation?

The Lancing includes its own aluminum base, so it doesn't require a poured concrete foundation — a level, well-drained site (paver base, compacted gravel, or a existing patio slab) is enough for most installs.

How does ventilation work?

Every size ships with automatic roof vent openers that respond to temperature without any wiring, plus manual louvre windows for cross-breeze. If you'd rather not open louvres by hand, automatic louvre openers are available as an upgrade.

Is the glass safe if something hits it?

Yes — the Lancing uses 3mm toughened safety glass throughout, clamped into aluminum glazing bars so individual panes can be replaced without disturbing the rest of the structure.

What's the warranty?

A 10-year manufacturer's guarantee on the cedar framework. Keep your receipt, and call or text us at 732-806-7959 if you ever need to file a claim.

What if I have more questions?

Call or text us at 732-806-7959 — we're happy to help.