{"product_id":"grandio-summit-12x20-greenhouse-kit","title":"Grandio Summit 12x20 Greenhouse Kit, 10mm Twin-Wall Polycarbonate","description":"\u003cp\u003eThe Grandio Summit 12x20 is Grandio's largest and tallest greenhouse, with a 12-foot width, cross roof trusses, corner bracing and a lockable double sliding door. It gives you 240 square feet of growing space under a 9' 3\" peak, on a powder-coated aluminum frame glazed with 10mm twin-wall polycarbonate, which diffuses sunlight and holds heat better than single-wall glazing. The kit comes with 10 roof vents, built-in rain gutters, drain kit (4 downspouts) and extreme snow load kit, and Grandio includes the assembly tools.\u003c\/p\u003e\u003ch3\u003eAccessories upgrade: what's included\u003c\/h3\u003e\u003cp\u003eChoose \u003cem\u003eAdd accessories upgrade\u003c\/em\u003e to receive:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e10 automatic roof vent openers (one per roof vent)\u003c\/li\u003e\n\u003cli\u003e2 packs of 10 plant hangers\u003c\/li\u003e\n\u003cli\u003e1 trellis kit\u003c\/li\u003e\n\u003cli\u003e1 drip irrigation kit\u003c\/li\u003e\n\u003cli\u003e2 bottles of polycarbonate-safe panel cleaner (8 oz)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e10mm twin-wall polycarbonate\u003c\/strong\u003e – insulating, UV-protected panels that spread light evenly and cut down on hot spots.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePowder-coated aluminum frame\u003c\/strong\u003e – 1.2 mm powder-coated aluminum, 1.5 mm in reinforced areas (green); rust-proof and rated by Grandio for up to 25 lb\/ft² of snow and winds up to 76 mph when properly anchored.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10 roof vents\u003c\/strong\u003e – adjustable ventilation; each vent accepts a Grandio automatic opener that works without electricity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBind-resistant double sliding doors\u003c\/strong\u003e – about 3' 5\" wide x 7' 1.5\" tall, with a magnetic latch and key lock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in rain gutters\u003c\/strong\u003e – carry roof runoff away from the foundation and feed the included corner downspouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReinforced structure\u003c\/strong\u003e – cross roof trusses and cross corner bracing with 1.5 mm aluminum in the high-load areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBack door option\u003c\/strong\u003e – the Grandio Summit Back Door Transformation Kit turns the rear wall into a second double door for walk-through access and cross-breezes.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eGood fit for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eYear-round vegetable, herb and flower growing\u003c\/li\u003e\n\u003cli\u003eStarting seedlings weeks ahead of the outdoor season\u003c\/li\u003e\n\u003cli\u003eOverwintering citrus, tropicals and tender perennials\u003c\/li\u003e\n\u003cli\u003eSerious growers who want room for benches, raised beds and tall crops\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eExterior size (W x L)\u003c\/td\u003e\n\u003ctd\u003e12' x 20' (240 sq ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePeak height\u003c\/td\u003e\n\u003ctd\u003e9' 3\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoof style\u003c\/td\u003e\n\u003ctd\u003eBarn-style\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFrame\u003c\/td\u003e\n\u003ctd\u003e1.2 mm powder-coated aluminum, 1.5 mm in reinforced areas (green)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePanels\u003c\/td\u003e\n\u003ctd\u003e10mm twin-wall polycarbonate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDoors\u003c\/td\u003e\n\u003ctd\u003eBind-resistant double sliding, about 3' 5\" wide x 7' 1.5\" tall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLatch\u003c\/td\u003e\n\u003ctd\u003eMagnetic latch with key lock\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRoof vents\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRain gutters\u003c\/td\u003e\n\u003ctd\u003eBuilt-in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteel base kit\u003c\/td\u003e\n\u003ctd\u003eSold separately (add with the Dirt anchor option)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSnow load kit\u003c\/td\u003e\n\u003ctd\u003eExtreme snow load kit included\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSnow load rating\u003c\/td\u003e\n\u003ctd\u003eUp to 25 lb\/ft² (Grandio rating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWind rating\u003c\/td\u003e\n\u003ctd\u003eUp to 76 mph when properly anchored (Grandio rating)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAnchor options\u003c\/td\u003e\n\u003ctd\u003eWood, concrete, dirt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBack door kit\u003c\/td\u003e\n\u003ctd\u003eAvailable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eExtendable\u003c\/td\u003e\n\u003ctd\u003eYes (4' or 8' Summit extension kits)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly tools\u003c\/td\u003e\n\u003ctd\u003eIncluded\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer SKU\u003c\/td\u003e\n\u003ctd\u003eSUMMIT-1220\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's in the box\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGrandio Summit 12x20 greenhouse frame, 10mm twin-wall panels and doors\u003c\/li\u003e\n\u003cli\u003e10 roof vents and built-in rain gutters\u003c\/li\u003e\n\u003cli\u003eDrain kit and extreme snow load kit\u003c\/li\u003e\n\u003cli\u003eAnchoring hardware for the anchor type you select\u003c\/li\u003e\n\u003cli\u003eStainless steel hardware, assembly tools and instruction manual\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eChoosing your anchor type\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWood\u003c\/strong\u003e – for mounting on a deck, timber frame or wood platform. Includes the wood anchoring hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcrete\u003c\/strong\u003e – for a slab, patio or other hard surface. Includes the concrete anchoring hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirt (adds steel base kit)\u003c\/strong\u003e – for installing on soil. Adds the Grandio Summit 12x20 steel base kit (BAS-1220) with dirt anchors; the price updates when you select it.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eManufacturer warranty\u003c\/h3\u003e\u003cp\u003eGrandio lists a lifetime warranty on the aluminum frame and a 15-year warranty on the polycarbonate panels, covering manufacturer defects. Assembly questions and missing or damaged parts are handled directly by Grandio's support team, and we'll help connect you.\u003c\/p\u003e\u003ch3\u003eBefore you build\u003c\/h3\u003e\u003cp\u003ePick a level, well-drained spot with at least six hours of direct sun, and check local building codes, permit rules and HOA requirements before you start. The greenhouse must be anchored to its foundation to reach its rated wind and snow performance. Assembly goes much faster with a second person.\u003c\/p\u003e","brand":"Grandio","offers":[{"title":"Wood \/ Standard kit","offer_id":49602321678491,"sku":"SUMMIT-1220-W","price":6899.0,"currency_code":"USD","in_stock":true},{"title":"Wood \/ Add accessories upgrade","offer_id":49602321711259,"sku":"SUMMIT-1220-UPG-W","price":7988.0,"currency_code":"USD","in_stock":true},{"title":"Concrete \/ Standard kit","offer_id":49602321744027,"sku":"SUMMIT-1220-C","price":6899.0,"currency_code":"USD","in_stock":true},{"title":"Concrete \/ Add accessories upgrade","offer_id":49602321776795,"sku":"SUMMIT-1220-UPG-C","price":7988.0,"currency_code":"USD","in_stock":true},{"title":"Dirt (adds steel base kit) \/ Standard kit","offer_id":49602321809563,"sku":"SUMMIT-1220-D","price":7998.0,"currency_code":"USD","in_stock":true},{"title":"Dirt (adds steel base kit) \/ Add accessories upgrade","offer_id":49602321842331,"sku":"SUMMIT-1220-UPG-D","price":9087.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0746\/0614\/9787\/files\/Untitled-design-11_5f40b17e-85c1-4d86-99be-e8144a3b57e9.jpg?v=1790024440","url":"https:\/\/offgridhorizon.com\/products\/grandio-summit-12x20-greenhouse-kit","provider":"OffGrid Horizon","version":"1.0","type":"link"}