Grandio Elite Greenhouse 8×12

This beautiful barn-style greenhouse delivers exceptional performance in all seasons with a design that’s as functional as it is eye-catching. The Grandio Elite 8×12 Greenhouse Kit combines a heavy-duty aluminum frame with ultra-insulated 10mm twin-wall polycarbonate panels, giving you a premium growing space that’s built to thrive in harsh environments.

With nearly 100 square feet of interior space, overhead sliding doors, roof ventilation, and a peak height of over 8 feet, this greenhouse is made for serious growers looking to protect their plants year-round.

NEW ORDERS TO SHIP LATE JUNE

Key Benefits

• 10mm twin-wall polycarbonate panels for top-tier insulation (R-Value: 1.89)

• 1.6mm powder-coated aluminum frame resists rust, corrosion, and deformation

• Elegant barn-style roof offers extra headroom and enhanced snow shedding

• Overhead-mounted double sliding doors with nylon wheels for smooth operation

• Glazing system designed for impact resistance and long-term clarity

• Roof vents included for natural airflow and climate control

• Easy DIY assembly with pre-drilled parts and step-by-step instructions

• Lifetime frame warranty and 10-year panel coverage

Grandio Elite 8x12 Greenhouse for Four-Season Growing in Any Climate

Engineered to perform in tough weather, the Grandio Elite 8×12 is one of the most insulated greenhouses on the market. Its 10mm twin-wall polycarbonate panels retain heat and diffuse light, while the unique barn-style design allows for extra grow space and optimal airflow. Whether you're in the mountains or the Midwest, this greenhouse holds strong and keeps your crops protected.

Ideal Applications

• Overwintering citrus, tropicals, or sensitive ornamentals

• Spring seed starting and early propagation

• Year-round herb and vegetable production

• Compact commercial-style greenhouse builds

• Residential growing in snow- or wind-prone areas

Grandio Elite 8x12 Greenhouse Kit with Reinforced Barn-Style Frame

The Grandio Elite isn’t just good-looking—it’s battle-tested. Unlike PVC-based barn-style greenhouses that can warp or crack, the Elite uses a 1.6mm aluminum frame for superior strength and stability. The doors glide from an overhead track to eliminate jamming, and the brass-fitted nylon wheels ensure years of dependable access, even in rugged environments.

What's the Difference Between the Basic and Premium Kit?

Both the Basic and Premium kits come with Grandio’s durable 10mm twin-wall polycarbonate panels, a strong base kit, integrated rain gutters, a reliable snow load kit, and (3) roof windows—delivering dependable performance in all seasons.

The Premium Kit adds a full suite of extras to simplify greenhouse management and enhance your growing potential:

• (3) Automatic Roof Vent Openers – Regulate interior temperature automatically for consistent airflow

• (1) Pack of 10 Plant Hangers – Create vertical growing space for baskets or trellised plants

• (1) Trellis Kit – Organize climbing crops and maximize interior space

• (1) Drip Irrigation Kit – Keep plants evenly and efficiently watered

• (1) 8 oz. Bottle of Brillianize Cleaner – Maintain panel clarity and UV protection with safe cleaning

If you're looking for a streamlined, low-maintenance growing setup, the Premium Kit offers unbeatable value and functionality.

Maintenance Tips

• Clean panels seasonally with mild soap and water for light clarity

• Keep door track clear to prevent sliding resistance

• Lubricate brass fittings and hinges annually

• Check and tighten frame hardware after extreme weather

• Anchor securely to a flat base or slab for maximum storm protection

Choose the best foundation for your greenhouse with our customizable base kits:

🔹 Optional Steel Base Kit – Ideal for windy or extreme environments, this heavy-duty steel base adds extra strength, stability, and 3 inches of headroom. Powder-coated to resist rust and decay, it includes anchoring options for earth/soil, concrete slabs, or wooden decks.

🔹 Included Flat Mount Base Kit – Perfect for controlled environments like fenced-in yards or patios. This base secures to concrete slabs or wooden decks, providing a stable foundation for your greenhouse. If installing over soil, the Steel Base Kit is required for optimal support.

Built for Harsh Weather. Designed for Gardeners Who Don’t Settle.

The Grandio Elite 8×12 Greenhouse Kit is more than a seasonal structure—it’s a long-term investment in your growing success. Enjoy unmatched insulation, strong weather resistance, and a beautiful design that enhances your backyard and your harvests.

Premium Kit Includes:

• 10mm Twin-Wall Panels
• (3) Roof Windows
• Base Kit
• Rain Gutters
• Snow Load Kit
• (3) Auto Roof Vent Openers
• (1) Pack of 10 Plant Hangers
• (1) Trellis Kit
• (1) Drip Kit
• (1) 8 oz. Brillianize Cleaner

Specifications

• Height: 8′
• Width: 8′ 2″
• Length: 12′
• Frame: Heavy duty aluminum
• Wind Rating: Withstands winds up to 76 mph*
• Snow Rating: Maximum snow load of 25lbs./ft² of snow*
• Color: Powder coated green
• Panels: 10mm twin-wall UV protected polycarbonate.
• Door Width: 44″
• Doors: Bind-resistant sliding double-doors.
• Latch: Easy-latch doors with double-ball catch
• Tools: Included
• Hardware: Stainless steel nuts and bolts
• Reinforcement: Cross-roof truss and cross corner bracing
• Gutters: Built-in rain gutters
• Ventilation: (3) roof vents with adjustable manual openers/latches

User Manual/ Assembly  

FAQ

You have questions, no problem, we have answers.

How easy is the Grandio to assemble? Very easy. We’ve designed and perfected the assembly process with you in mind. We provide the tools and a step-by-step assembly manual and video and if you have any problems you can call us at 1-844 873-5764.

Is a building permit required? You may not need a permit for your Grandio, but it is always a good idea check before you get started. We recommend you check local ordinances and requirements before setting up your greenhouse.

Is it strong enough for windy or heavy snow locations? Definitely. Grandio’s are all designed to withstand the most hostile environments with a wind rating of 76 MPH and snow load rating of 25lbs./ft² of snow. We offer additional roof and eave supports to increase the strength and durability of the greenhouse frame for the Element Greenhouses. Just follow the included directions for securing your greenhouse and you’ll enjoy many years of growing with your Grandio.

I live in the hot southwest will Grandio Greenhouses work for me? For people who live in high temperature areas of the country like Arizona, Texas, California, Nevada, or New Mexico we recommend our aluminum shade net. The aluminum shade net reflects the sun on the hottest days to help your greenhouse keep it’s cool.

How do the automatic roof vent openers work? The opener has a metal cylinder containing a mineral which expands when heated. This pushes a piston that opens the vent. As the temperature cools, the mineral shrinks and a spring closes the vent and resets the piston. The opening and closing of the vent is gradual allowing just the right amount of air flow for cooling. No electricity needed!

How large is the roof vent opening? The vent opening is 18-3/4″ width by 22-3/4” length.

What is the difference in polycarbonate thicknesses? Polycarbonate is available in several different thicknesses and normally comes in single, double, and triple walled sheets that can vary in thickness from 1mm to 10mm. A good rule to remember is that the thicker the panel the better insulation you’ll have for your greenhouse.

Can these greenhouse be mounted to a concrete pad? The Grandio comes standard with a base that is meant to anchor it in the soil with concrete footers or a duckbill anchor kit. However, it can be mounted to a concrete pad with additional tools and hardware. For more information please refer to our online manual or give us a call 1-844 873-5764 to discuss options.

Can’t wait for your Grandio? Here’s what to expect.

How many boxes will I receive?
Your new Grandio ships in 2 or more manageable-sized boxes (the exact number of boxes depends on the size of your greenhouse).

How is it shipped?
Grandio Greenhouses are generally shipped via UPS Ground.

Can I buy a Grandio if I live outside the USA?
Currently we can only ship orders to the USA.

How long will my order take to get to me?

• West: 2-4 business days

• Northwest: 1-3 business days

• Southwest: 3-5 business days

• Midwest: 4-6 business days

• East: 5-7 business days

Note: These are estimates and business days are the time your items are in-transit only and do not include order processing time. Inclement weather and unforeseen carrier or transportation emergencies may delay your delivery.

Videos

Warranty

• Frame: Lifetime limited warranty

• Panels: 10-year limited warranty

• Doors & Hardware: 1-year warranty