{"product_id":"riga-door-frame-extension-kit-20-taller-iis-iiis-ivs","title":"Riga Door Frame Extension Kit","description":"\u003ch2\u003e\u003cstrong\u003eRiga Door Frame Extension Kit – +20\" Height | Riga IIs, IIIs \u0026amp; IVs\u003c\/strong\u003e\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eRiga Door Frame Extension Kit\u003c\/strong\u003e adds 20 inches of height to the door frame of your Riga IIs, IIIs, or IVs greenhouse when the structure is mounted on a raised foundation. It fills the gap above the door opening that results from elevating the greenhouse, eliminating the need to build a custom step-over or workaround for the raised door frame.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003e*Free shipping only when purchased together with a Riga greenhouse. Ordered separately, standard shipping rates apply.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eAdds 20\" of height to the Riga door frame\u003c\/li\u003e\n\u003cli\u003eDesigned for raised foundation installations — fills the gap above the door opening\u003c\/li\u003e\n\u003cli\u003eCompatible with Riga IIs, Riga IIIs, and Riga IVs greenhouse models\u003c\/li\u003e\n\u003cli\u003eEliminates the need for a custom step-over or workaround at the door\u003c\/li\u003e\n\u003cli\u003ePurpose-built Riga accessory — no modifications required\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeight Added\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Models\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRiga IIs, Riga IIIs, Riga IVs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUse Case\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRaised foundation installations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRIGA-DOOR-FRAME-EXT-234S\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrice\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e$379\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShipping\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFree when purchased with a Riga greenhouse; standard rates apply when ordered separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhen Do You Need This Kit?\u003c\/h3\u003e\n\u003cp\u003eWhen a Riga greenhouse is installed on a raised foundation — such as a concrete pad, timber base, or elevated platform — the door frame sits higher than the standard ground-level installation. This creates a gap above the door opening between the top of the door frame and the greenhouse structure. The Door Frame Extension Kit fills this gap cleanly and professionally, restoring the door to its intended appearance and function without custom fabrication.\u003c\/p\u003e\n\u003cp\u003eIf your Riga greenhouse will be installed at ground level on a standard base kit, you do not need this extension kit.\u003c\/p\u003e\n\n\u003ch3\u003eWhich Extension Kit Do I Need?\u003c\/h3\u003e\n\u003cp\u003eRiga offers two door frame extension kits — make sure you order the correct one for your model:\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eKit\u003c\/th\u003e\n\u003cth\u003eCompatible Models\u003c\/th\u003e\n\u003cth\u003ePrice\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThis kit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRiga IIs, Riga IIIs, Riga IVs\u003c\/td\u003e\n\u003ctd\u003e$379\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003ca href=\"\/products\/riga-door-frame-extension-kit-20-taller-iii-iv-v\"\u003eOther kit\u003c\/a\u003e\u003c\/td\u003e\n\u003ctd\u003eRiga III, Riga IV, Riga V\u003c\/td\u003e\n\u003ctd\u003e$439\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe \"S\" suffix models (IIs, IIIs, IVs) are the smaller variants within each Riga size tier. If you are unsure which model you have, check your greenhouse documentation or contact us with your model number.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhich Riga models is this kit compatible with?\u003c\/strong\u003e\u003cbr\u003eThis door frame extension kit is compatible with the Riga IIs, Riga IIIs, and Riga IVs greenhouse models — the smaller \"S\" suffix variants. It is not compatible with the standard Riga III, IV, or V models (those use a different kit priced at $439), or the Riga XL. If you are unsure which model you have, contact us with your greenhouse model number before ordering.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between the Riga \"S\" models and the standard models?\u003c\/strong\u003e\u003cbr\u003eThe \"S\" suffix (IIs, IIIs, IVs) denotes the smaller length variant within each Riga size tier. For example, the Riga IIIs is shorter than the standard Riga III. Both share the same width and arch profile but differ in length. The door frame extension kits are model-specific, so it’s important to order the correct kit for your exact model.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDo I need this kit if I’m using the standard Riga base kit?\u003c\/strong\u003e\u003cbr\u003eNot necessarily. The standard Riga base frame raises the greenhouse by 6 inches. Whether you need the door frame extension depends on the total height of your foundation. If you are installing on a raised concrete pad, timber platform, or other elevated foundation that significantly raises the greenhouse above ground level, this kit is recommended. Contact us with your foundation height and we’ll confirm whether the extension kit is needed.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy is free shipping only available when purchased with a greenhouse?\u003c\/strong\u003e\u003cbr\u003eThe door frame extension kit ships free when ordered together with a Riga greenhouse because it can be included in the same shipment. When ordered separately, it ships as a standalone item and standard shipping rates apply.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I install this kit myself?\u003c\/strong\u003e\u003cbr\u003eYes — the extension kit is designed for straightforward installation without specialized tools. It attaches to the existing Riga door frame. Contact us if you need installation guidance specific to your model.\u003c\/p\u003e","brand":"Exaco","offers":[{"title":"Default Title","offer_id":59517644341534,"sku":"RIGA-DOOR-FRAME-EXT-234S","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1078\/1802\/5246\/files\/Riga_5.3.webp?v=1786477861","url":"https:\/\/rigagreenhousekit.com\/products\/riga-door-frame-extension-kit-20-taller-iis-iiis-ivs","provider":"Riga Greenhouses","version":"1.0","type":"link"}