{"product_id":"grandio-summit-4-extension-kit","title":"Grandio Summit 4' Extension Kit","description":"\u003cp\u003eThis 4 ft. extension kit adds approximately 32 sq. ft. of interior growing area to a compatible greenhouse. It is designed to integrate with the existing frame, glazing system, and structural profile while maintaining a consistent appearance.\u003c\/p\u003e\n\u003cp\u003eThe extension uses 10 mm polycarbonate panels and a heavy-duty aluminum frame with reinforced areas. It includes 2 roof vents, built-in rain gutters, and a snow-load kit, with 4 selectable anchoring configurations for different installation requirements.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional Length:\u003c\/strong\u003e Adds 4 ft. of length to an existing compatible greenhouse.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional Growing Area:\u003c\/strong\u003e Provides approximately 32 sq. ft. of additional interior growing area.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntegrated Construction:\u003c\/strong\u003e Designed to match the existing frame dimensions, glazing system, and structural profile.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeavy-Duty Frame:\u003c\/strong\u003e Uses a 1.2 mm aluminum frame with 1.5 mm reinforced areas.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolycarbonate Panels:\u003c\/strong\u003e Uses 10 mm polycarbonate panels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRoof Ventilation:\u003c\/strong\u003e Includes 2 roof vents.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRainwater Management:\u003c\/strong\u003e Built-in rain gutters are incorporated into the extension.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSnow-Load Support:\u003c\/strong\u003e A snow-load kit is included.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnchor Configurations:\u003c\/strong\u003e Select Wood, Concrete, Dirt with Base Kit, or No Anchor or Base Kit according to the installation requirements.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cstyle\u003e\n  .summit-extension-features {\n    width: 100%;\n    padding: 15px;\n    background-color: #fbfaf7;\n    box-sizing: border-box;\n  }\n\n  .summit-extension-grid {\n    display: grid;\n    grid-template-columns: repeat(2, minmax(0, 1fr));\n    gap: 10px;\n    width: 100%;\n    margin: 0 auto;\n  }\n\n  .summit-extension-card {\n    min-height: 54px;\n    padding: 12px 15px;\n    display: flex;\n    align-items: center;\n    gap: 14px;\n    background-color: #fff7e8;\n    border-radius: 11px;\n    box-sizing: border-box;\n  }\n\n  .summit-extension-card:last-child {\n    grid-column: 1 \/ -1;\n    width: calc(50% - 5px);\n    justify-self: center;\n  }\n\n  .summit-extension-icon {\n    width: 28px;\n    height: 28px;\n    flex: 0 0 28px;\n    object-fit: contain;\n  }\n\n  .summit-extension-text {\n    margin: 0;\n    color: #242424;\n    font-family: Arial, Helvetica, sans-serif;\n    font-size: 12px;\n    font-weight: 400;\n    line-height: 1.4;\n  }\n\n  @media screen and (max-width: 749px) {\n    .summit-extension-features {\n      padding: 10px 0;\n    }\n\n    .summit-extension-grid {\n      grid-template-columns: 1fr;\n    }\n\n    .summit-extension-card,\n    .summit-extension-card:last-child {\n      grid-column: auto;\n      width: 100%;\n      justify-self: stretch;\n    }\n\n    .summit-extension-text {\n      font-size: 13px;\n    }\n  }\n\u003c\/style\u003e\n\u003cdiv class=\"summit-extension-features\"\u003e\n\u003cdiv class=\"summit-extension-grid\"\u003e\n\u003cdiv class=\"summit-extension-card\"\u003e\n\u003cimg class=\"summit-extension-icon\" src=\"https:\/\/grandiogreenhouses.com\/cdn\/shop\/files\/house_icon_15b1fa68-5d02-4819-8cc3-9cf823d73b8b.png?v=1773964925\u0026amp;width=64\" alt=\"Additional growing space icon\" loading=\"lazy\" width=\"28\" height=\"28\"\u003e\n\u003cp class=\"summit-extension-text\"\u003eProvides Additional 32sq ft Of Growing Space\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"summit-extension-card\"\u003e\n\u003cimg class=\"summit-extension-icon\" src=\"https:\/\/grandiogreenhouses.com\/cdn\/shop\/files\/blocks_icon_fcadc3a2-0bbf-460d-b027-66b4d1883b4b.png?v=1773964925\u0026amp;width=64\" alt=\"Seamless integration icon\" loading=\"lazy\" width=\"28\" height=\"28\"\u003e\n\u003cp class=\"summit-extension-text\"\u003eSeamless Integration to Match Existing Greenhouse\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"summit-extension-card\"\u003e\n\u003cimg class=\"summit-extension-icon\" src=\"https:\/\/grandiogreenhouses.com\/cdn\/shop\/files\/barbell_icon_a00bb9bf-467c-402f-a792-33e476a4e737.png?v=1773964924\u0026amp;width=64\" alt=\"Structural integrity icon\" loading=\"lazy\" width=\"28\" height=\"28\"\u003e\n\u003cp class=\"summit-extension-text\"\u003eMaintains Structural Integrity\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"summit-extension-card\"\u003e\n\u003cimg class=\"summit-extension-icon\" src=\"https:\/\/grandiogreenhouses.com\/cdn\/shop\/files\/lightbulb_icon_7b3392d9-18ca-4f64-a182-9318c4f0b43c.png?v=1773964924\u0026amp;width=64\" alt=\"Easy installation icon\" loading=\"lazy\" width=\"28\" height=\"28\"\u003e\n\u003cp class=\"summit-extension-text\"\u003eEasy to Install\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"summit-extension-card\"\u003e\n\u003cimg class=\"summit-extension-icon\" src=\"https:\/\/grandiogreenhouses.com\/cdn\/shop\/files\/double_leaf_icon_be52a8b8-4122-4c6b-9bf3-9893e690aab8.png?v=1773964924\u0026amp;width=64\" alt=\"More room to grow icon\" loading=\"lazy\" width=\"28\" height=\"28\"\u003e\n\u003cp class=\"summit-extension-text\"\u003eMore Room to Grow\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch3 class=\"PDq2pG_selectionAnchorContainer\"\u003eSpecifications\u003cspan class=\"PDq2pG_selectionAnchor\"\u003e\u003c\/span\u003e\n\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight:\u003c\/strong\u003e 9 ft. 3 in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth:\u003c\/strong\u003e 12 ft.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtension Length:\u003c\/strong\u003e 4 ft.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional Growing Area:\u003c\/strong\u003e Approximately 32 sq. ft.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame:\u003c\/strong\u003e 1.2 mm heavy-duty aluminum with 1.5 mm reinforced areas\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrame Color:\u003c\/strong\u003e Green\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolycarbonate Panel Thickness:\u003c\/strong\u003e 10 mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNumber of Roof Vents:\u003c\/strong\u003e 2\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRain Gutters:\u003c\/strong\u003e Built-in\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel Base Kit:\u003c\/strong\u003e Sold separately; included with the selectable Dirt configuration\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSnow-Load Kit:\u003c\/strong\u003e Included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptional Back-Door Kit:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAnchor Options:\u003c\/strong\u003e Wood, Concrete, Dirt\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAssembly Tools:\u003c\/strong\u003e Not included\u003c\/li\u003e\n\u003cli\u003eSize Guide\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtension Dimensions:\u003c\/strong\u003e 12 ft. wide x 4 ft. long x 9 ft. 3 in. high\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAdditional Interior Growing Area:\u003c\/strong\u003e Approximately 32 sq. ft.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eCompatible With:\u003c\/strong\u003e Grandio Summit greenhouse models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot Compatible With:\u003c\/strong\u003e Grandio Ascent, Elite, or Element greenhouse models.\u003c\/p\u003e\n\u003ch3\u003eIncluded\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1.2 mm heavy-duty aluminum frame with 1.5 mm reinforced areas\u003c\/li\u003e\n\u003cli\u003e10 mm polycarbonate panels\u003c\/li\u003e\n\u003cli\u003e2 roof vents\u003c\/li\u003e\n\u003cli\u003eBuilt-in rain gutters\u003c\/li\u003e\n\u003cli\u003eSnow-load kit\u003c\/li\u003e\n\u003cli\u003eAnchoring components for the selected Wood, Concrete, or Dirt configuration\u003c\/li\u003e\n\u003cli\u003eSteel base kit with the Dirt configuration\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFoundation \u0026amp; Anchoring Solutions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWood Installation:\u003c\/strong\u003e Select Wood for installation on decks, wooden platforms, or timber bases. The Wood Anchoring Kit secures the extension to the wood foundation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcrete Installation:\u003c\/strong\u003e Select Concrete for installation on pavement, concrete slabs, or other hard surfaces. The Concrete Anchoring Kit secures the extension to the hard surface.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGround or Dirt Installation:\u003c\/strong\u003e Select Dirt (Adds Base Kit $200) for dirt or earth installation. This configuration includes the required steel base kit. The heavy-duty powder-coated steel base adds stability and rigidity, resists rust and corrosion, and provides an additional 3 in. of headroom.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty:\u003c\/strong\u003e Lifetime warranty on the aluminum frame; 15-year warranty on the polycarbonate panels.\u003c\/p\u003e","brand":"Grandio Greenhouses","offers":[{"title":"Default Title","offer_id":51034800816375,"sku":"SUMMIT-4X","price":1200.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/1868\/3895\/files\/1_8b26f250-b7c0-4d60-bd78-a2c8975f3acb.png?v=1786979943","url":"https:\/\/northgridsupply.com\/products\/grandio-summit-4-extension-kit","provider":"Northgrid Supply","version":"1.0","type":"link"}