Grandio Summit Greenhouse 12×28
Grandio Summit Greenhouse 12×28 – The Ultimate Year-Round Gardening Space
Introducing the Grandio Summit Greenhouse 12×28—a barn-style greenhouse that brings you a spacious, durable, and insulated environment for year-round growing. Designed with a heavy-duty aluminum frame and 10mm twin-wall polycarbonate panels, this greenhouse ensures your plants thrive in all seasons, whether it's winter's chill or summer's heat.
Superior Durability and Insulation for Every Climate
Engineered to withstand harsh environments, the Grandio Summit Greenhouse 12×28 is one of the most insulated greenhouses available today. Its barn-style design not only maximizes your growing space but also enhances the aesthetic of your yard. With 10mm polycarbonate panels, this greenhouse offers superior UV protection, an R-value of 1.89, and a heat loss (U) value of 0.53, ensuring your plants receive optimal insulation throughout the year.
The 1.6mm profile aluminum frame provides exceptional strength and durability, making this greenhouse a long-term investment for hobbyists and professional gardeners alike.
Optimal Ventilation and Easy Access
Designed for efficient airflow and easy entry, the Grandio Summit Greenhouse 12×28 features ample roof windows and re-engineered sliding double doors for ventilation. The high-quality nylon wheels and solid brass bolts reduce wear and provide smooth operation, ensuring that your doors open and close effortlessly.
The doors are hung from above, which eliminates jamming, ensuring reliable access every time. Additionally, the heavy-duty lockable door handles with included keys provide added security.
Flexible Installation Options
The Grandio Summit Greenhouse 12×28 offers versatile installation options to suit your needs. Whether you're constructing it on a concrete slab or a wood deck, the included Flat Mount Base Kit ensures a secure and stable foundation. For in-ground installations, we recommend the Steel Base Kit with Earth L-Bolt Anchor Kit, which offers superior stability and protection against extreme weather conditions.
Key Features:
- 10mm twin-wall polycarbonate panels for enhanced insulation and UV protection
- 1.6mm aluminum frame for added durability and strength
- Roof windows and sliding double doors for optimal ventilation
- UV protection with an R-value of 1.89 and U-value of 0.53
- Lockable door handles for added security
- Flexible foundation options for concrete or earth installation
Designed for gardeners who demand the best, the Grandio Summit Greenhouse 12×28 offers exceptional value, quality, and performance. Whether you’re growing vegetables, flowers, or plants, this greenhouse provides the ideal environment for healthy, year-round growth.
Reach the Summit with Grandio!
Premium Kit Includes:
- 10mm Twin-Wall Panels
- (14) Roof Windows
- Rain Gutters
- Drain Kit
- Extreme Snow Load Kit
- Flat Mount Anchor Kit
- (14) Auto Roof Window Openers
- (2) Packs of 10 Plant Hangers
- (2) 8 oz. Brillianize Cleaner
- (1) Trellis Kit
- (1) Drip Kit
Basic Kit Includes:
- 10mm Twin-Wall Panels
- (14) Roof Windows
- Rain Gutters
- Drain Kit
- Extreme Snow Load Kit
- Flat Mount Anchor Kit
Actual Size: 12′ W x 28′ L x 9.25′ H
Specifications
- Height: 9.5′
- Width: 12′
- Length: 28′
- 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: (14) 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.