10ft Straight Wall Walk-In Polycarbonate Greenhouse Kit - Loft Series

• Buy the Loft if you want a year round greenhouse you will genuinely work in — shelving flat against the wall, tall crops at the edge, and headroom where you are actually standing rather than only down the center of the floor.
• Take the 6 mm panels if you are growing through winter in this one. Straight walls and a 7.2 ft peak enclose more air to keep warm, and the deeper twinwall is what keeps it.
• Look at the Arc Series instead if your site is exposed or snow-heavy. The full arch carries 75 mph against this frame's 65 mph, and it costs less per square foot at every length.

• Frame: 1" × 1" hot-dip galvanized steel tubing. Galvanizing bonds a zinc layer to the steel that corrodes in place of the steel underneath, which is what lets a frame this light span this wide outdoors, year after year.
• Glazing: UV-protected twinwall polycarbonate, your choice of 4 mm or 6 mm. Twinwall diffuses light so your plants are not scorched by a hot spot, and the hollow channel holds heat that single-layer glass or film gives straight back.
• Doors: two Dutch doors, one at each end. Open the top halves alone for cross-ventilation without letting the dog or the rabbits in.
• Form: straight sidewalls with an arched roof over the top.
• Wind rating: 65 mph.
• Snow: sheds up to 5 ft of snow.
• Width and height: 10 ft wide, 7.2 ft at the peak — a true walk-in.
• Warranty: 3-year frame warranty.
• Manufacturer model: Magnolia Reinforced.

Every length below is the real, measured length. Our lengths are metric conversions, so we publish them exactly — a 19.5 ft house is listed as 19.5 ft, never rounded up to 20.

10 ft wide in eight lengths — 6.5 ft (65 sq ft), 13 ft (130), 19.5 ft (195), 26 ft (260), 32.5 ft (325), 39 ft (390), 45.5 ft (455) and 52 ft (520 sq ft).

Straight walls change how the square footage reads. Almost all of it is standing-height floor, so a Loft works harder than the same number on an arch. At 65 sq ft you get a propagation house with a bench down one side. At 130 sq ft two benches and an aisle fit comfortably, which is where most winter growers land. From 260 sq ft up you can heat a zone, hold a cool zone, and still have a packing bench — a large greenhouse by hobby standards, and more than enough to carry a household's vegetables straight through the cold months. And the arithmetic that decides most orders: the price per square foot drops with every length you go up, so the size you nearly bought is almost always the one you should have.

The Loft starts at $1,589 with curbside freight already in the price, and a 10 ft-wide walk-in greenhouse in our line starts at $1,489. The premium 10 ft hobby greenhouses people cross-shop, built on a lighter alloy frame, typically open near $2,400 before delivery is added on. What you are buying here is span: hot-dip galvanized steel is the reason a 10 ft width with vertical walls lands at this number at all.

Both thicknesses are the same UV-protected twinwall polycarbonate — twin-wall, if you have seen it spelled that way. Two sheets are bonded over a sealed hollow channel, and the air trapped in that channel is the insulation. That is why a polycarbonate greenhouse holds heat a single pane of glass gives straight back, and why the light arrives diffused instead of laying a hot stripe across your seedlings. Choosing between the two is a climate question, not a quality one.

• 4 mm — the right panel for mild and temperate zones and for spring-to-fall growing. It passes the most light of the two, and it is what most backyard growers buy.
• 6 mm — a deeper air channel and a stiffer panel. Take it if you want an insulated greenhouse you can run through a cold winter, if you plan to heat the space, or if your site takes real snow. The upgrade costs a few hundred dollars on a short house and more on a long one; panel area is what you are paying for.

The short version: if you intend to grow past the first hard frost, buy the 6 mm. If the house shuts down in November, 4 mm is the honest answer and the difference is better spent on the next length up.

• Foundation: level, well-drained ground is the whole requirement. A compacted gravel pad, a timber perimeter or a poured slab all work. Level matters more than material — a frame set out of square fights you on every panel.
• Anchoring: a wind rating describes a greenhouse that is anchored to the ground. Whatever base you build, tie the frame down into it before the first storm, and keep the zinc coating intact where you drill.
• Permits: many jurisdictions treat an unheated hobby greenhouse as an accessory structure and exempt it below a footprint threshold, but the threshold and the property-line setbacks are local. One call to your building department settles it, and the two numbers they will ask for — footprint and peak height — are both listed above.
• Assembly: it arrives as a kit with an illustrated manual. Plan on two people and ordinary hand tools, and pick a calm day: the panels are large and awkward for one person to hold in any wind.

Curbside LTL freight is included in the price for the lower 48 states. Alaska, Hawaii, US territories and PO boxes are not served — contact us for a freight quote outside the lower 48.

Curbside means the carrier brings the pallet to the end of your driveway and it is yours from there, so have a second person and a way to move it. Residential freight is normally delivered by appointment, so keep the phone number on your order current.

Inspect the shipment before you sign the delivery receipt. Note any damage on the receipt at the moment of delivery — that note is what makes a freight claim work, and a signature on a clean receipt is very hard to walk back afterwards.

We do not quote transit times. LTL is a third-party network, and a date we cannot control is not a date worth promising; you get tracking as soon as the shipment is booked.

• 3-year frame warranty on the galvanized steel structure.
• Damage or missing pieces: tell us and replacement parts are shipped. That is the manufacturer's stated remedy, and it is the reason the inspection line above is set in bold.
• Returns: unopened, in original condition, with the polycarbonate undamaged. Return freight is paid by the customer — a pallet this size costs real money to send back, which is the honest reason to settle the size before you order rather than order twice.
• Financing: available at checkout. The terms shown there are the ones you were actually approved for, which is why you will not find a payment figure printed anywhere on this page.

Undecided between two lengths, or between the two panel thicknesses? Ask us first. We would far rather spend ten minutes on the phone than watch a freight pallet travel back across the country.