{"product_id":"foundation-frame-for-riga-iii","title":"Foundation Frame for Riga III","description":"\u003ch2\u003e\u003cstrong\u003eFoundation Frame for Riga III Greenhouse\u003c\/strong\u003e\u003c\/h2\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eRiga III Foundation Frame\u003c\/strong\u003e is the purpose-built ground installation solution for the Riga III greenhouse. Rather than requiring a concrete pad, this frame is buried in a trench and backfilled with soil to securely anchor the greenhouse directly to the ground — providing a stable, level foundation while also raising the greenhouse height for additional headroom and growing space.\u003c\/p\u003e\n\n\u003cp\u003e\u003cem\u003e*Free shipping only when purchased together with a Riga greenhouse. Ordered separately, an additional shipping charge applies.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned specifically for the Riga III greenhouse model\u003c\/li\u003e\n\u003cli\u003eBuried in-ground installation — no concrete required\u003c\/li\u003e\n\u003cli\u003eBackfilled with soil to securely anchor the greenhouse\u003c\/li\u003e\n\u003cli\u003eRaises the greenhouse height — adds headroom and growing space\u003c\/li\u003e\n\u003cli\u003ePurpose-built Riga accessory — engineered to fit the Riga III footprint exactly\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Model\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRiga III\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation Method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBuried in trench, backfilled with soil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFoundation Required\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo concrete — installs directly into ground\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBenefit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSecures greenhouse to ground; adds height for headroom and growing space\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSKU\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRIGA-III-BASE\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; additional charge when ordered separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eHow the Foundation Frame Works\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eDig a trench around the perimeter of your greenhouse site to the required depth\u003c\/li\u003e\n\u003cli\u003ePosition the foundation frame in the trench at the correct level\u003c\/li\u003e\n\u003cli\u003eBackfill the trench with soil and compact to secure the frame\u003c\/li\u003e\n\u003cli\u003eAttach the Riga III greenhouse structure to the foundation frame\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eThis method provides a secure, stable anchor without the cost or permanence of a concrete foundation. The raised frame height also gives you additional interior headroom and growing depth compared to a ground-level installation.\u003c\/p\u003e\n\n\u003ch3\u003eFoundation Frame vs. Concrete Foundation — Which Should You Choose?\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eFoundation Frame (this product)\u003c\/th\u003e\n\u003cth\u003eConcrete Foundation\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDig trench, backfill with soil\u003c\/td\u003e\n\u003ctd\u003ePour and cure concrete slab\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCost\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLower — no concrete materials or labor\u003c\/td\u003e\n\u003ctd\u003eHigher — materials, labor, curing time\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePermanence\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRemovable — can be relocated\u003c\/td\u003e\n\u003ctd\u003ePermanent\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeadroom Benefit\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes — raises greenhouse height\u003c\/td\u003e\n\u003ctd\u003eDepends on slab thickness\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBest For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSoil or lawn installations without existing concrete\u003c\/td\u003e\n\u003ctd\u003eSites with existing concrete or maximum permanence required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs the foundation frame required for the Riga III?\u003c\/strong\u003e\u003cbr\u003eA proper foundation is strongly recommended for structural integrity, stability, and warranty compliance. The foundation frame is the recommended solution for soil or lawn installations. If you are installing on an existing concrete pad, you may not need this frame — contact us to confirm the right foundation approach for your site.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eHow deep does the trench need to be?\u003c\/strong\u003e\u003cbr\u003eThe required trench depth depends on your local frost line and soil conditions. Contact us or refer to your Riga III installation instructions for the recommended trench depth for your climate zone.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDoes the foundation frame add headroom inside the greenhouse?\u003c\/strong\u003e\u003cbr\u003eYes — because the frame raises the greenhouse above ground level, you gain additional interior height compared to a ground-level installation. This is a meaningful benefit for tall growers or for hanging baskets and vertical growing setups.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCan I install the foundation frame myself?\u003c\/strong\u003e\u003cbr\u003eYes — the installation process (dig trench, position frame, backfill, attach greenhouse) is designed for DIY completion. Having two people is recommended for frame positioning and alignment. Refer to your Riga III installation instructions for specific guidance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eWhy is free shipping only available when purchased with a greenhouse?\u003c\/strong\u003e\u003cbr\u003eThe foundation frame ships free when ordered together with a Riga III greenhouse because it can be included in the same freight shipment. When ordered separately, it ships as a standalone item and an additional shipping charge applies due to its size and weight.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eIs this foundation frame compatible with other Riga models?\u003c\/strong\u003e\u003cbr\u003eNo — this foundation frame is engineered specifically for the Riga III footprint. Other Riga models have their own dedicated foundation frames. Contact us to find the correct foundation frame for your specific Riga model.\u003c\/p\u003e","brand":"Exaco","offers":[{"title":"Default Title","offer_id":59517644275998,"sku":"RIGA-III-BASE","price":1299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1078\/1802\/5246\/files\/Riga_Base_Foundation_3.webp?v=1786480930","url":"https:\/\/rigagreenhousekit.com\/products\/foundation-frame-for-riga-iii","provider":"Riga Greenhouses","version":"1.0","type":"link"}