Grandio Greenhouse Summit 12x12

SKU: SUMMIT-1212

$4,499.00 $5,174.00

You Save: $675.00 14%

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Kit Options

Why Choose the Summit 12x12 Greenhouse Kit for Your Garden?

The Summit 12x12 Greenhouse Kit is the ultimate solution for year-round gardening. Designed for serious growers and garden enthusiasts alike, this spacious barn-style greenhouse combines strength, style, and exceptional functionality. Its durable construction and thoughtful features make it ideal for extending your growing season and protecting your plants in any climate.

Key Benefits

Heavy-Duty Weather Protection Built to handle harsh weather, the Summit 12x12 features a 1.6mm thick aluminum frame and 10mm twin-wall UV-protected polycarbonate panels that offer superior insulation. With an R-value of 1.89 and a U-value of 0.53, it maintains stable internal temperatures for healthy plant growth throughout the year.

Optimal Ventilation & Access Six roof vents with manual openers ensure excellent airflow, preventing overheating and humidity buildup. The smooth-glide double sliding doors, hung from above to prevent jamming, offer easy entry and exit—even with your hands full.

Enhanced Durability & Convenience This greenhouse comes equipped with practical extras that set it apart:

Rain gutters with a drain kit to manage runoff
Extreme snow load kit for added support
Flat mount anchor kit for secure installation
Lockable magnetic-latch doors for safety
Nylon door wheels for smooth, reliable operation

Whether you're planting, potting, or propagating, the Summit 12x12 offers the secure, dependable structure you need to grow with confidence.

Specifications

Feature	Details
Frame	Heavy-Duty Aluminum
Color	Powder-Coated Green
Panels	10mm Twin-Wall UV-Protected Polycarbonate
Doors	Sliding Double Doors (Bind-Resistant)
Latch	Magnetic Latch Doors with Key Lock
Reinforcement	Cross-Roof Truss & Cross-Corner Bracing
Hardware	Stainless Steel Nuts and Bolts
Rain Gutters	Included
Ventilation	6 Roof Vents with Manual Openers
Wind Rating	Up to 76 mph*
Snow Load Rating	Up to 25 lbs./ft²*

Dimensions

Actual Size: 12 ft (W) x 12 ft (L) x 9.25 ft (H)
Door Opening: 41.5 in (W) x 85 in (H)

What’s Included?

Basic Kit:

10mm Twin-Wall Polycarbonate Panels
6 Roof Vents
Rain Gutters
Drain Kit
Extreme Snow Load Kit
Flat Mount Anchor Kit

Optional Premium Kit:

Everything in the Basic Kit, plus:
- 4 Automatic Roof Vent Openers
- Pack of 10 Plant Hangers
- Trellis Kit
- Drip Irrigation Kit
- 8 oz. Brillianize Cleaner
- Base Kit

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!

We're committed to offering you the best prices available online. If you come across a lower price on another online store, let us know, and we'll not just match it — we'll beat it. We aim to give you the assurance that you're getting the best possible price for your purchase. Our Price Match Guarantee, however, comes with certain conditions: Offers like rebates, and 'buy one, get one free' deals are not included.The competing website cannot be a discount or auction platform (for example, eBay). The competing retailer must be an authorized seller of the item in question. The guarantee takes into account the total cost, including the item's price, sales tax, and shipping charges. Please note, our Price Match Guarantee does not apply to exchange orders. If you want us to match or beat a price, just call us today (

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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