Grandio Summit Greenhouse 12×12
Grandio Summit Greenhouse 12×12 – Premium Barn-Style Design for All-Season Gardening
The Grandio Summit Greenhouse combines rugged durability with premium insulation, making it one of the most advanced barn-style greenhouses on the market. Whether you’re a hobbyist or a professional gardener, this greenhouse offers year-round growing capabilities with superior strength and protection against the elements.
Engineered for Strength & Performance
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Heavy-Duty Aluminum Frame: The 1.6mm profile aluminum construction provides unmatched strength, resisting warping, melting, or cracking, unlike PVC-based greenhouses.
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10mm Twin-Wall Polycarbonate Panels: Offering an R-value of 1.89 and a U-value of 0.53, these panels provide optimal winter insulation while ensuring superior light diffusion for plant growth.
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Elegant & Functional Barn-Style Design: The spacious interior allows for maximum growing space, making it perfect for a variety of plants, from vegetables to exotic flowers.
Designed for Convenience & Longevity
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Smooth Gliding Double Doors: Re-engineered to hang from above, eliminating jamming, and fitted with high-quality nylon wheels and a solid brass bolt for long-lasting performance.
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Enhanced Ventilation System: Multiple roof windows ensure proper airflow, reducing excess heat and humidity.
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Heavy-Duty Lockable Handles: Keep your greenhouse secure with built-in locking door handles and an included key for extra protection.
Installation Options – Cover Your Bases
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Concrete Slab or Wooden Deck: The included Flat Mount Base Kit provides a stable and secure foundation with your choice of anchors for concrete or wood surfaces.
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In-Earth Installation: For enhanced durability in windy or extreme environments, the optional Steel Base Kit with Earth L-Bolt Anchors provides reinforced stability by embedding directly into the ground.
Why Choose the Grandio Summit Greenhouse?
✔ Best-in-class insulation for year-round gardening
✔ Durable & rust-resistant aluminum frame for long-term use
✔ Spacious & well-ventilated to promote healthy plant growth
✔ Secure & easy-to-use sliding doors with reinforced locking mechanism
✔ Multiple foundation options to suit different installation needs
With unparalleled strength, insulation, and design, the Grandio Summit 12×12 is the ultimate greenhouse for gardeners who demand the best. Take your gardening to new heights and reach the Summit with Grandio!
Premium Kit Includes:
- 10mm Twin-Wall Panels
- (6) Roof Windows
- Rain Gutters
- Drain Kit
- Extreme Snow Load Kit
- Flat Mount Anchor Kit
- (6) Auto Roof Window Openers
- (1) Pack of 10 Plant Hangers
- (1) 8 oz. Brillianize Cleaner
- (1) Trellis Kit
- (1) Drip Kit
Basic Kit Includes:
- 10mm Twin-Wall Panels
- (6) Roof Windows
- Rain Gutters
- Drain Kit
- Extreme Snow Load Kit
- Flat Mount Anchor Kit
Actual Size: 12′ W x 12′ L x 9.25′ H
Specifications
- Height: 9.5′
- Width: 12′
- 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 Size: 41.5″ W x 85″ H
- Doors: Bind-resistant sliding double-doors.
- Latch: Magnetic latch doors with key lock.
- Reinforcement: Cross-roof truss and cross corner bracing.
- Tools: Included
- Hardware: Stainless steel nuts and bolts.
- Gutters: Built-in rain gutters.
- Ventilation: (6) roof vent with adjustable manual openers/latches.
Assembly
This is your resource for finding complete assembly instructions for all Grandio Summit Greenhouses. You can download the instructions in PDF format or you can view the assembly video. We’ve provided everything you need to get started with your new Grandio greenhouse. Have questions? Give us a call 1-866-448-8231.
Grandio Summit Greenhouse Assembly Manuals
» Download: Grandio Summit Manual 1 – Base Kit Assembly Instructions and Installation
» Download: Grandio Summit Manual 2 – Summit Greenhouse Assembly Instructions
» Download: Grandio Summit Manual 3 – Itemized Parts List, Graphics, Descriptions and Quantities
Grandio Summit Greenhouse Anchoring Kit Manuals
» Download: Grandio Summit Manual 1 – Flat and Earth Base Kit Assembly with Earth Anchoring Kit
» Download: Grandio Summit Wood Anchoring Kit Supplement Manual
» Download: Grandio Summit Concrete Anchoring Kit Supplement Manual
Note: In order to read the manuals, you need the Adobe Acrobat PDF reader.
Q&A
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.