Grandio Greenhouse Summit 12x28

SKU: SUMMIT-1228

$8,499.00 $9,774.00

You Save: $1,275.00 14%

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Kit Options

Is the Summit 12x28 Greenhouse Kit the Right Choice for Year-Round Gardening?

The Summit 12x28 Greenhouse Kit is built to support your gardening goals all year long. Featuring a spacious barn-style design, robust aluminum framing, and high-performance insulation panels, this greenhouse delivers strength, space, and style in one complete package. Whether you're a hobbyist or a serious grower, the Summit is engineered to thrive in virtually any climate.

Key Benefits

? Heavy-Duty Build for Harsh Weather Crafted with a reinforced 1.6mm aluminum frame, the Summit stands strong against high winds and heavy snow. Built for long-term durability, this greenhouse ensures your plants remain protected through all four seasons.

? Superior Insulation for Cold Climates Outfitted with 10mm twin-wall polycarbonate panels, the Summit retains heat efficiently with an R-value of 1.89 and a U-value of 0.53, helping maintain optimal internal temperatures and reducing heating costs during colder months.

? Easy Access and Secure Doors The sliding double doors are smooth-gliding and bind-resistant for hassle-free entry. They include a magnetic latch with a key lock, giving you added peace of mind when securing your greenhouse.

? Optimized Ventilation for Plant Health Fourteen roof vents with manual openers provide excellent airflow, preventing overheating and promoting a healthy growing environment.

? Weather-Ready Accessories Included From built-in rain gutters and a snow load kit to anchor kits and a drain system, the Summit is fully equipped for weather of all kinds. It's a complete solution for both beginner and seasoned gardeners.

Specifications

Feature	Details
Frame	1.6mm Heavy-Duty Aluminum
Color	Powder-Coated Green
Panels	10mm Twin-Wall UV-Protected Polycarbonate
Doors	Sliding Double Doors (Bind-Resistant)
Latch	Magnetic with Key Lock
Reinforcement	Cross-Roof Truss & Corner Bracing
Hardware	Stainless Steel Nuts & Bolts
Ventilation	14 Roof Vents with Manual Openers
Rain Gutters	Included
Wind Rating	Up to 76 mph*
Snow Load Rating	Up to 25 lbs./ft²*

Dimensions

Overall Size: 12' W x 28' L x 9.25' H
Door Opening: 41.5" W x 85" H

What’s in the Box?

Basic Kit Includes:

10mm Twin-Wall Polycarbonate Panels
(14) Manual Roof Vents
Integrated Rain Gutters
Drainage Kit
Extreme Snow Load Kit
Flat Mount Anchor Kit

Optional Premium Kit Includes:

All features in the Basic Kit
(14) Automatic Roof Vent Openers
(2) Packs of 10 Plant Hangers
(1) Trellis Kit
(1) Drip Irrigation Kit
(2) 8 oz. Bottles of Brillianize Cleaner
Base Kit for enhanced stability

Why Choose Grandio?

Grandio Greenhouses are engineered to outlast and outperform competing brands, offering exceptional strength and insulation for year-round gardening success. The Summit’s barn-style roof adds headroom and elegance, while its robust frame and quality components give you peace of mind for seasons to come.

Ready to create your dream garden in any season? The Summit 12x28 Greenhouse Kit gives you the space, durability, and features you need for successful, year-round growing.

GRANDIO SUMMIT #1 BASE INSTALLATION

GRANDIO SUMMIT #2 ASSEMBLY INSTRUCTION

GRANDIO SUMMIT #3 PARTS LIST

Order Processing Time: We typically process orders within 1 to 2 days. Please be aware that the deadline for placing orders is 6 p.m. Orders submitted after this time will be processed the next business day. Shipping Information: Expect your order to arrive in 4 to 7 days. We offer free shipping for orders over $200. For orders below $200, a flat shipping fee of $15 applies. Please note that we currently only ship within the United States. International shipping is not available. The majority of our orders are dispatched via third-party freight carriers (18-wheelers). In case your order includes an item that requires freight shipping, we will contact you to schedule a curbside delivery. Ensure that your contact number is correct at checkout. Order Confirmation and Payment: After you place your order, a confirmation email will be sent to you. This confirms that your order is registered in our system and your credit card is authorized for the purchase. Your card will be charged only when the item is shipped. For backordered items, we might hold a charge to reserve the product for you. As soon as we receive your order, we begin processing it immediately!

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At Attachment Selection, we want to make your shopping experience worry-free, so we've simplified our returns and refunds process: Return Period: Items can be returned within 30 days of purchase. Unfortunately, we cannot accept returns after this 30-day period. Shipping Costs for Returns: If your purchase is defective or not as described, we'll cover the return shipping cost. However, if you're returning an item due to a change of mind, the shipping cost will be your responsibility. Defective or Damaged Items: If you receive a defective or damaged product, please inform us within 30 days. We'll arrange a return at no extra cost to you. After receiving and inspecting the item, we'll either replace it or refund you in full, including shipping costs. Returns Due to Change of Mind: If you change your mind about your purchase, you have 30 days to return it. Remember, you will be responsible for the return shipping cost. The item must be unused and in its original packaging. Upon receipt and inspection, we'll refund the cost of the item, excluding shipping charges. Processing Refunds: Once we receive and verify the returned item, we'll initiate a refund to your original payment method within 7 business days. Note that it might take some time for your bank or card to reflect the refund. If you don't see the refund after 10 business days, please contact us at support@athleteselection.com. Please be aware that a restocking fee may apply in certain return scenarios. For any further inquiries regarding our return or refund policy, our Customer Support team is here to help at support@athleteselection.com.

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