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Grandio Ascent 8x20 Greenhouse Kit

Grandio Ascent 8x20 Greenhouse Kit
Sold out
$4,899.00
$4,899.00 - $5,564.00
$4,899.00
$4,399.00
$4,399.00 - $4,998.00
$4,399.00
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PRODUCT NAME
Anchor Option: Wood
Premium Upgrade: No Upgrade

The Grandio Ascent 8x20 delivers 160 square feet of walk-in growing space under a 7 ft 9 in peak, near the top of the Ascent range. It is built for growers who want maximum residential capacity, with the steel base kit and snow load kit included so it is winter ready out of the box.

  • 7 ft 9 in peak height with wide 3 ft 6 in double sliding doors for carts and wheelbarrows
  • Heavy duty 1.2mm powder-coated aluminum frame, rust proof with a lifetime frame warranty
  • 6mm twin-wall polycarbonate panels for insulation and even light diffusion
  • Five roof vents with multi-level handles, plus built-in rain gutters
  • Steel base kit and snow load kit included
  • Rated for 76 mph winds and 25 lbs per sq ft of snow when properly anchored

Best for: hobby growers running several dedicated zones at once, homesteaders, and small-scale market gardeners in any climate, including heavy snow country. An optional back door transformation kit adds a second entrance for a true walkthrough layout.

Choose your anchor option at checkout: Wood for decks, Concrete for slabs and patios, or Dirt for soil installs. The optional Premium Upgrade adds five roof vent auto openers, 20 plant hangers, a trellising kit, a drip irrigation kit, and panel cleaner.

Specifications

Dimensions 8 ft W x 20 ft L x 7 ft 9 in H
Frame 1.2mm heavy duty aluminum, powder coated green
Panels 6mm twin-wall polycarbonate
Door Bind resistant double sliding door, 3 ft 6 in x 6 ft
Roof Vents 5
Rain Gutters Built-in
Steel Base Kit Included
Snow Load Kit Included
Back Door Kit Optional
Snow Rating 25 lbs/sq ft maximum snow load
Wind Rating Up to 76 mph when anchored properly
Extendable Yes
Warranty Lifetime frame, 15 year panels

Shipping and Support

Free shipping in the contiguous US. Ships in multiple boxes via ground freight. Lifetime warranty on the aluminum frame and 15 year limited warranty on polycarbonate panels. Our team can help you pick the right anchor option before you order.

Frequently Asked Questions

How does the 8x20 compare to the 8x16? It adds 25 percent more growing space and a fifth roof vent, with the same frame and included kits. If you know you will use every square foot, this is the size to get.

Which anchor option do I need? Wood for decks or timber bases, Concrete for slabs and patios, Dirt for soil or grass installs. The included steel base works with all three.

Can I use it year-round? Yes. The twin-wall panels retain heat in cooler months, and five roof vents manage summer heat across the long span. Add a small heater for frost protection in cold climates.

How hard is assembly? Components are pre-cut and labeled with hardware and tools included. Plan two days with a helper for this size.