{"product_id":"riga-4-large-polycarbonate-greenhouse","title":"Riga 4 Greenhouse Kit | 135 sq. ft.","description":"\u003ch2 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eWhat's Included?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eEvery Riga 4 Greenhouse Kit ships as a complete kit:\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAll polycarbonate panels (8mm sides, 10mm gable ends)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eComplete aluminum frame with all extrusions and connectors\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBarn-style hinged door with upgraded handle and key lock (30\" W x 79\" H)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e2 roof ventilation windows with automatic openers\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e1 large rear wall window\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eHeavy-duty rubber seals throughout\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAll hardware and fasteners\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eDetailed assembly guide\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eShips in 3 boxes. Free curbside delivery to the lower 48. The carrier will call to schedule your delivery appointment.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eImportant delivery note:\u003c\/strong\u003e The Riga 4 ships via freight on an 18-wheeler truck. Please ensure the delivery truck can access your property before ordering. If access is limited, contact us before placing your order and we'll discuss options.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eWhy Buy from South Table Sheds\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eWe're an authorized Exaco dealer based in Golden, Colorado, with 17 years of experience with outdoor structures. When you buy from us, you're not just dealing with an online store, you're working with people who've assembled these greenhouses, know how they perform through Colorado winters, and are available to answer real questions before and after your purchase.\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eFree shipping to the continental US\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eSecure checkout with Shop Pay installments available\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAuthorized Exaco retailer, purchase fully protected\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eProfessional assembly available across the Denver metro\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eCall us directly: 720-656-7313\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eThe Riga 4 — The Dedicated Grower's Greenhouse\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Riga 4 is where gardeners land when they're ready to start growing.  At 135 square feet 9'8\" wide by 14' long and 7'7\" at the peak,  this is a greenhouse with real working space. Two full growing benches with a generous center aisle, enough floor space for raised beds and containers, and two automatic roof vents that keep temperatures consistent across the full length of the structure.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe 9'8\" width gives you 2 full feet more interior space than the S series, and that extra width changes how the space works. You can run wider benches, move around more freely, and bring in larger plants without maneuvering around tight corners. The taller 79\" door makes that even easier.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThis is the greenhouse dedicated growers across Colorado buy when they're done compromising on space. If you're growing vegetables year-round through a Front Range winter, starting hundreds of seedlings, or overwintering a serious collection of plants, the Riga 4 gives you the room to do it right.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eDenver Area? Add Professional Assembly\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eSouth Table Sheds has been building and assembling outdoor structures across Colorado since 2008. If you'd rather spend your time growing than reading instruction manuals, we'll handle the entire assembly — from site prep through final inspection.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003ca href=\"https:\/\/southtablesheds.com\/pages\/greenhouse-assembly-in-denver-co-professional\" class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\"\u003eGet a free assembly quote →\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAssembly available throughout the Denver metro, Golden, Boulder, Lakewood, Arvada, Littleton, Centennial, Aurora, and surrounding Front Range communities.\u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eWhy Choose the Riga 4 Greenhouse Kit?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Riga 4 greenhouse is designed around one principle: the minimum insulation needed to grow plants year-round without excessive heating costs. Here's what that means in practice.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eMost budget greenhouse kits use 4–6mm single-wall polycarbonate panels. A single-wall panel has no insulating air gap.  Heat escapes as fast as it's generated, and heating costs reflect that. The Riga 4 uses 8mm twin-wall panels on the side walls and 10mm twin-wall on the gable ends. The air gap between the two walls creates an insulating barrier that retains heat significantly longer than single-wall alternatives.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eFor Colorado gardeners running a heater through our cold nights, this difference shows up in your energy bill every month from October through April. The Riga 4 costs more upfront than a budget kit, and costs less to operate every year you own it.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eBeyond insulation, the Riga 4 is engineered for the conditions that matter most on the Front Range:\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eHail resistance\u003c\/strong\u003e  twin-wall panels absorb impact rather than shattering\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eWind performance\u003c\/strong\u003e aerodynamic curved roof redirects wind rather than catching it\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eSnow shedding\u003c\/strong\u003e curved profile sheds snow naturally rather than accumulating loads\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eUV protection\u003c\/strong\u003e  10-year panel warranty against UV degradation at altitude\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eFrame longevity\u003c\/strong\u003e  13-gauge anodized aluminum with 15-year warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cbr\u003e\u003c\/h3\u003e\n\u003ch2 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eRiga 4 vs. Riga 3 - What's the Difference?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eBoth are Large series greenhouses sharing the same 9'8\" width and 7'7\" peak height. The difference is length, growing area, and number of roof vents:\u003c\/p\u003e\n\u003cdiv class=\"overflow-x-auto w-full px-2 mb-6\"\u003e\n\u003ctable class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\"\u003e\n\u003cthead class=\"text-left\"\u003e\n\u003ctr\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003e\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eRiga 3\u003c\/th\u003e\n\u003cth class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\"\u003eRiga 4\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eWidth\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e9'8\"\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e9'8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eLength\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e10'6\"\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e14'\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePeak Height\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e7'7\"\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e7'7\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eGrowing Area\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e102 sq. ft.\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e135 sq. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eDoor Height\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e79\"\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e79\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eRoof Vents\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e1 automatic\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e2 automatic\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eSide Wall Glazing\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e8mm twin-wall\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e8mm twin-wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003eGable End Glazing\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e10mm twin-wall\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e10mm twin-wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003ePrice\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e$6,899\u003c\/td\u003e\n\u003ctd class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\"\u003e$8,099\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Riga 4 costs $1,200 more than the Riga 3 and gives you 33 additional square feet, 3.5 more feet of length, and a second automatic roof vent. For dedicated growers who want maximum working space in the Large series, the Riga 4 is the natural step up.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e \u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eWhy the Riga 4 Outperforms Every Other Greenhouse in Its Class\u003c\/strong\u003e\u003c\/h2\u003e\n\u003ch3 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\" style=\"padding-left: 40px;\"\u003e\u003cstrong\u003e8mm + 10mm Twin-Wall Polycarbonate: Not All Panels Are Equal\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\" style=\"padding-left: 40px;\"\u003eThe Riga 4 uses 8mm twin-wall polycarbonate on the side walls and 10mm panels on the gable ends. Most competing greenhouses use uniform 4–6mm single-wall panels throughout. The difference in heat retention, hail resistance, and UV protection is significant, especially at Colorado's elevation where UV intensity is considerably higher than at sea level.\u003c\/p\u003e\n\u003ch3 style=\"padding-left: 40px;\" class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eAerodynamic Curved Roof: Engineered for Snow Country\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\" style=\"padding-left: 40px;\"\u003eThe distinctive bell-shaped curved roof isn't just a design choice,  it's engineering. Snow slides off rather than accumulating into dangerous loads. Wind rolls over rather than pushing against flat surfaces. This matters everywhere, but especially on the Front Range where March can deliver 2 feet of wet spring snow overnight.\u003c\/p\u003e\n\u003ch3 style=\"padding-left: 40px;\" class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eTwo Automatic Roof Vents: Consistent Temperature Control\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\" style=\"padding-left: 40px;\"\u003eAt 14' long, two automatic roof vents are essential for even temperature distribution. Both vents respond to temperature independently,  no electricity required. Combined with the large rear wall window and the tall 79\" barn-style door, cross-ventilation across the full length of the Riga 4 is excellent even during Colorado's most intense summer afternoons.\u003c\/p\u003e\n\u003ch3 style=\"padding-left: 40px;\" class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eTaller Dutch Door with Upgraded Handle\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\" style=\"padding-left: 40px;\"\u003eThe Riga 4's door stands 79\" tall with an upgraded handle. Moving large plants in and out is significantly easier, and the upgraded hardware is more durable for daily use over many seasons.\u003c\/p\u003e\n\u003ch3 style=\"padding-left: 40px;\" class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003e13-Gauge Aluminum Frame:  Built to Last Decades\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\" style=\"padding-left: 40px;\"\u003eEvery extrusion is substantial anodized aluminum, not the thin-wall tubing found in budget structures. Hoklartherm backs the frame with a 15-year warranty. The polycarbonate panels carry a 10-year warranty against UV degradation. This is the kind of structure you're still using when your kids are grown.\u003c\/p\u003e\n\u003ch3 style=\"padding-left: 40px;\" class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003ePrecision German Manufacturing\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\" style=\"padding-left: 40px;\"\u003eHoklartherm has been building greenhouses in Germany for over 30 years. Every hole lines up. Every panel fits. Every connector seats properly. The unique channel design of the aluminum components allows for simple slide-and-fit assembly, saving time and reducing the frustration common with lesser-made kits.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\" style=\"padding-left: 40px;\"\u003e \u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eOptional Add-Ons\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eFoundation Frame (+$1,499)\u003c\/strong\u003e The aluminum foundation frame provides a level perimeter base when mounting to a prepared surface. Buries in a shallow trench around the perimeter for a solid, level anchor. Strongly recommended for Colorado's freeze-thaw soil conditions.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eShelf System\u003c\/strong\u003e Purpose-built shelving that hangs from the frame rather than the walls, preserving floor space and light penetration:\u003c\/p\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTop Shelf — 10\" wide x 13'10\" long (+$439)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eBottom Shelf — 25\" wide x 13'10\" long (+$624)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe suspended shelf system is one of the Riga 4's most distinctive features. It adds usable growing space without compromising structural integrity or blocking light.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eThe Riga Large Series:  Find Your Size\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003ca class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/southtablesheds.com\/products\/riga-3-polycarbonate-greenhouse-kit-102-sq-ft-exaco-riga-large-series\"\u003eRiga 3 — 102 sq. ft.\u003c\/a\u003e (9'8\" x 10'6\") — The entry point. Perfect balance of space and footprint. $6,899\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eRiga 4 — 135 sq. ft. (9'8\" x 14') — You are here. Two automatic roof vents, serious working space.\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eRiga 5 — 165 sq. ft. (9'8\" x 17'6\") — Maximum Large series space, four automatic roof vents. $9,199\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eLooking for a narrower footprint? The Riga S series starts at 54 sq. ft. with a 7'8\" width, from $5,999.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eNeed a professional-grade structure? The \u003ca class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\" href=\"https:\/\/southtablesheds.com\/products\/riga-xl-6-polycarbonate-greenhouse\"\u003eRiga XL 6\u003c\/a\u003e steps up to 14' wide with 16mm triple-wall glazing.\u003c\/p\u003e\n\u003ch3 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003e\u003cstrong\u003eResources and Manuals\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0584\/8747\/2246\/files\/Riga-Manual-2025v2-Models-new-version-2.26.25.pdf?v=1746904356\" class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\"\u003eDownload the Riga 4 Assembly Guide (PDF)\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003ca href=\"https:\/\/www.youtube.com\/watch?v=kkX4nLVbf_M\" class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\"\u003eWatch the Riga Assembly Video on YouTube\u003c\/a\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e \u003c\/p\u003e\n\u003ch2 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\"\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eHow does the Riga 4 hold up in Colorado hailstorms?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eBetter than most greenhouse kits on the market. The Riga 4 uses 10mm twin-wall polycarbonate on the gable ends and 8mm twin-wall on the side walls, both significantly thicker than the 4–6mm single-wall panels found on budget greenhouses. The twin-wall construction absorbs impact rather than shattering, and the polycarbonate itself is far more impact-resistant than glass. Colorado's Front Range sees some of the most intense hail in the country, and the Riga 4's panel thickness and curved roof profile,  which deflects rather than catches impact, making it one of the better-suited greenhouse kits for our climate.\u003c\/p\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eHow wind-resistant is the Riga 4?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Riga 4's aerodynamic bell-shaped curved roof is specifically engineered to perform in high-wind conditions. Rather than presenting flat surfaces for wind to push against, the curved profile redirects airflow up and over the structure. Customers in high-wind regions,  including the Sierra Nevada, coastal New England, and the Great Plains,  regularly report the Riga holding up through extreme wind events. On Colorado's Front Range, where chinook winds can gust well above 60 mph along the foothills, the Riga 4's frame and panel system is engineered to handle the load. For maximum wind resistance, we recommend anchoring to a solid foundation,  either a concrete pad or the optional aluminum foundation frame.\u003c\/p\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eHow much does it cost to heat a Riga 4 greenhouse in Colorado?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eSignificantly less than heating a single-wall greenhouse of the same size. The 8mm and 10mm twin-wall polycarbonate panels create an insulating air barrier that retains heat much longer than single-wall alternatives. Most Colorado gardeners maintain above-freezing temps overnight with a small 1,500-watt electric heater or a compact propane unit. Running costs depend on your target temperature and how cold it gets,  but the Riga 4's insulation advantage is meaningful from October through April on the Front Range.\u003c\/p\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat foundation does the Riga 4 need?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThree solid options: a concrete pad for maximum permanence, a level bed of compacted gravel or pavers for drainage and accessibility, or the optional aluminum foundation frame directly in soil. For a structure this size, a concrete pad or the foundation frame is strongly recommended for long-term stability in Colorado's freeze-thaw soil conditions.\u003c\/p\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eDo I need a building permit in Colorado for a greenhouse this size?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eAt 135 square feet, the Riga 4 may fall close to or above permit exemption thresholds in some Front Range municipalities. Rules vary significantly by city and HOA,  Jefferson County, Arapahoe County, Denver, and surrounding cities each have their own thresholds. We've navigated these requirements for 17 years. For a full overview, see our guide on \u003ca href=\"https:\/\/southtablesheds.com\/blogs\/news\/colorado-building-permits-shed-greenhouse-sauna\" class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\"\u003eColorado building permits for sheds, greenhouses, and saunas\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat's the difference between the Riga 4 and Riga 4s?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eThe Riga 4s is 7'8\" wide with a 72\" door. The Riga 4 is 9'8\" wide with a 79\" door and upgraded handle. Both are 14' long with 2 automatic roof vents. The Riga 4 gives you significantly more interior width, better headroom, and a taller door, a meaningful upgrade for gardeners who want maximum working space.\u003c\/p\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eDoes South Table Sheds offer greenhouse assembly services?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eYes. Our team offers professional greenhouse assembly throughout the Denver metro and Front Range. \u003ca href=\"https:\/\/southtablesheds.com\/pages\/contact\" class=\"underline underline underline-offset-2 decoration-1 decoration-current\/40 hover:decoration-current focus:decoration-current\"\u003eContact us for a quote\u003c\/a\u003e — we're typically booked 2–4 weeks out during peak season, so reach out early.\u003c\/p\u003e\n\u003ch2 class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003e\u003cstrong\u003eWhat's the advantage of two roof vents over one?\u003c\/strong\u003e\u003c\/h2\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal leading-[1.7]\"\u003eOn a 14' long greenhouse, a single roof vent concentrated at one end creates uneven temperature distribution. Two vents positioned along the length allow heat to escape more evenly, keeping temperatures consistent across the full growing space. On Colorado's intense summer afternoons this makes a real difference in plant health.\u003c\/p\u003e","brand":"South Table Sheds","offers":[{"title":"No \/ No \/ No","offer_id":43490119123062,"sku":null,"price":8099.0,"currency_code":"USD","in_stock":true},{"title":"No \/ No \/ Yes ($624)","offer_id":43490119155830,"sku":"RIGA IV Top Shelf \/  RIGA IV","price":8274.0,"currency_code":"USD","in_stock":true},{"title":"No \/ Yes (+439) \/ No","offer_id":43490119188598,"sku":"RIGA IV \/  RIGA IV Bottom Shelf","price":8538.0,"currency_code":"USD","in_stock":true},{"title":"No \/ Yes (+439) \/ Yes ($624)","offer_id":43490119221366,"sku":null,"price":9162.0,"currency_code":"USD","in_stock":true},{"title":"Yes (+1499) \/ No \/ No","offer_id":43490119254134,"sku":null,"price":9598.0,"currency_code":"USD","in_stock":true},{"title":"Yes (+1499) \/ No \/ Yes ($624)","offer_id":43490119286902,"sku":"Riga 4\/  RIGA IV Bottom Shelf \/  RIGA IV Base","price":10222.0,"currency_code":"USD","in_stock":true},{"title":"Yes (+1499) \/ Yes (+439) \/ No","offer_id":43490119319670,"sku":"Riga IV \/  RIGA IV Base   RIGA IV Top Shelf","price":10037.0,"currency_code":"USD","in_stock":true},{"title":"Yes (+1499) \/ Yes (+439) \/ Yes ($624)","offer_id":43490119352438,"sku":"Riga IV \/  RIGA IV Base\/   RIGA IV Top Shelf  RIGA IV Bottom Shelf","price":10661.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0584\/8747\/2246\/files\/RIGA4_1.jpg?v=1780882777","url":"https:\/\/southtablesheds.com\/products\/riga-4-large-polycarbonate-greenhouse","provider":"South Table Sheds","version":"1.0","type":"link"}