Grandio | Summit 12x28 Greenhouse | SUMMIT-1228
Grandio | Summit 12x28 Greenhouse | SUMMIT-1228 - Basic is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
We offer fast and reliable shipping across the continental U.S., with free shipping available on most orders (exclusions may apply based on brand and product type). Orders are typically processed within 1–2 business days and transit time is usually 4–7 business days. Larger items may ship via freight and require a scheduled curbside delivery. Please ensure your contact details are accurate at checkout. For questions about delivery timelines, shipping eligibility, or special requests, feel free to contact us directly. See Policy.
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Do You Offer Financing?
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Price Match Guarantee
Price Match Guarantee
We’re committed to offering the best online prices—if you find a lower price from an authorized retailer, we’ll beat it. Our 100% Price Beat Guarantee excludes promotions, auction sites, and exchanges, and factors in item price, tax, and shipping. For price match inquiries, contact us at (833) 932-9683
Is the Summit 12x28 Greenhouse Kit the Solution for Your Year-round Gardening Needs?
Overview
The Summit 12x28 Greenhouse Kit gives you a sturdy, insulated space for year-round growing. It pairs a rugged aluminum frame with 10mm twin-wall polycarbonate panels for durability in any climate. The barn-style design provides plenty of room for plants and a touch of garden-worthy charm.
Benefits
- Durable in tough weather: 1.6 mm aluminum frame stands up to storms and seasonal changes.
- Warm, efficient growing: 10mm twin-wall panels offer solid insulation (R ? 1.89; U ? 0.53).
- Easy access and airflow: sliding double doors glide smoothly and lock securely; 14 roof vents help keep air moving.
- Weather-ready package: rain gutters, a drain kit, a snow-load kit, and anchors come standard.
Features
- Frame: Heavy-duty powder-coated aluminum (1.6 mm).
- Panels: 10 mm twin-wall UV-protected polycarbonate.
- Doors: Bind-resistant sliding double doors with smooth operation.
- Latch: Magnetic latch doors with key lock.
- Reinforcement: Cross-roof truss and cross-corner bracing for stability.
- Hardware: Stainless steel nuts and bolts.
- Ventilation: 14 roof vents with adjustable manual openers/latches.
- Wind & snow: Withstands winds up to 76 mph; snow load up to 25 lb/ft² with the included kit.
- Color: Powder-coated green frame.
Specifications
- Actual size: 12' W x 28' L x 9.25' H
- Door size: 41.5" W x 85" H
- Frame material: Heavy-duty aluminum
- Panel material: 10mm twin-wall polycarbonate
- Rain gutters: Yes
- Ventilation: 14 roof vents
- Warranty: Lifetime frame / 10-year panels







