{"product_id":"riga-4-black-9x14-greenhouse","title":"Riga 4 Black 9x14 Greenhouse","description":"\u003ch2\u003eRiga IV Black 9x14 Greenhouse — German-Engineered, Four-Season Growing\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eRiga IV Black\u003c\/strong\u003e (also called the Riga 4 Black) is a \u003cstrong\u003e135 sq ft, four-season greenhouse\u003c\/strong\u003e engineered and manufactured in Germany by Exaco — a company with 28 years of greenhouse manufacturing experience. It shares the same 9'8\" wide \"onion\" arch profile as the Riga III but extends to 14 feet in length, adding 33 sq ft of growing area and a second automatic roof opener for superior ventilation across the full interior.\u003c\/p\u003e\n\u003cp\u003eThe Black Series upgrade adds a \u003cstrong\u003eblack powder-coated aluminum frame\u003c\/strong\u003e, \u003cstrong\u003e6mm crystal-clear single-layer polycarbonate front\u003c\/strong\u003e, and \u003cstrong\u003eVictorian cast metal roof cresting\u003c\/strong\u003e — delivering refined European aesthetics without compromising structural performance. The Riga IV Black is rated to \u003cstrong\u003e100 mph winds\u003c\/strong\u003e, carries a \u003cstrong\u003e15-year frame warranty\u003c\/strong\u003e, and ships in \u003cstrong\u003e1–2 weeks\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eShips in 1–2 weeks.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eWhat's Included — Basic Package\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e6mm crystal-clear single-layer polycarbonate — front gable and door\u003c\/li\u003e\n\u003cli\u003e8mm UV-coated translucent twin-wall polycarbonate panels — sides and roof\u003c\/li\u003e\n\u003cli\u003e10mm translucent twin-wall polycarbonate panels — rear gable (added strength)\u003c\/li\u003e\n\u003cli\u003e2 roof vents (22\" × 40\" each) with automatic openers\u003c\/li\u003e\n\u003cli\u003e1 rear wall window (3'5\" × 2'1\")\u003c\/li\u003e\n\u003cli\u003eSplit dutch hinged door with keyed lock\u003c\/li\u003e\n\u003cli\u003eFirst-class insulation — R\/K-value up to 1.89\u003c\/li\u003e\n\u003cli\u003e15-year warranty on aluminum frame\u003c\/li\u003e\n\u003cli\u003e10-year pro-rated warranty on polycarbonate panels\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBuild Your Package — Available Add-Ons\u003c\/h3\u003e\n\u003cp\u003eConfigure your Riga IV Black using the options above. Each add-on ships in the same delivery:\u003c\/p\u003e\n\u003ctable style=\"width: 100%; height: 156.75px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003cth style=\"width: 18.8319%; height: 39.1875px;\"\u003eOption\u003c\/th\u003e\n\u003cth style=\"width: 64.9634%; height: 39.1875px;\"\u003eWhat It Does\u003c\/th\u003e\n\u003cth style=\"width: 12.5442%; height: 39.1875px;\"\u003eAdded Cost\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 18.8319%; height: 39.1875px;\"\u003e\u003cstrong\u003eAnchor Option\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.9634%; height: 39.1875px;\"\u003eAnchoring hardware to secure the greenhouse to a concrete pad or foundation\u003c\/td\u003e\n\u003ctd style=\"width: 12.5442%; height: 39.1875px;\"\u003e+$99.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 78.375px;\"\u003e\n\u003ctd style=\"width: 18.8319%; height: 78.375px;\"\u003e\u003cstrong\u003eBase Kit (Foundation Frame)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 64.9634%; height: 78.375px;\"\u003e6\" H × 116\" W × 168\" D ground-installation frame; buried in trench and backfilled with soil to anchor the greenhouse and add interior height. Strongly recommended for soil\/lawn installations.\u003c\/td\u003e\n\u003ctd style=\"width: 12.5442%; height: 78.375px;\"\u003e+$1,499.00\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003ch3\u003e\u003cspan style=\"font-family: -apple-system, BlinkMacSystemFont, 'San Francisco', 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; font-size: 0.875rem;\"\u003eRiga IV Black vs. Riga III — Key Differences\u003c\/span\u003e\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eRiga IV Black (this model)\u003c\/th\u003e\n\u003cth\u003e\u003ca href=\"\/products\/riga-iii-9x10-greenhouse\"\u003eRiga III\u003c\/a\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eLength\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14'\u003c\/td\u003e\n\u003ctd\u003e10'6\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGrowing Area\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e135 sq ft\u003c\/td\u003e\n\u003ctd\u003e102 sq ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRoof Windows\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 (with auto openers)\u003c\/td\u003e\n\u003ctd\u003e1 (with auto opener)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBase Kit Cost\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e+$1,499\u003c\/td\u003e\n\u003ctd\u003e+$1,299.99\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStarting Price\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e$7,289\u003c\/td\u003e\n\u003ctd\u003e$6,209\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBest For\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMore growing length; 2-zone ventilation; larger harvests\u003c\/td\u003e\n\u003ctd\u003eCompact footprint; smaller gardens\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe Riga IV Black and Riga III share the same 9'8\" width and 7'7\" peak height. The Riga IV adds 3'6\" of length, 33 sq ft of growing area, and a second automatic roof opener for improved ventilation across the longer interior.\u003c\/p\u003e\n\u003ch3\u003eRiga Series Comparison\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eWidth\u003c\/th\u003e\n\u003cth\u003eLength\u003c\/th\u003e\n\u003cth\u003eHeight\u003c\/th\u003e\n\u003cth\u003eArea\u003c\/th\u003e\n\u003cth\u003eRoof Windows\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRiga IIs\u003c\/td\u003e\n\u003ctd\u003e7'4\"\u003c\/td\u003e\n\u003ctd\u003e7'\u003c\/td\u003e\n\u003ctd\u003e7'\u003c\/td\u003e\n\u003ctd\u003e~48 sq ft\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRiga IIIs\u003c\/td\u003e\n\u003ctd\u003e7'8\"\u003c\/td\u003e\n\u003ctd\u003e10'6\"\u003c\/td\u003e\n\u003ctd\u003e7'1\"\u003c\/td\u003e\n\u003ctd\u003e81 sq ft\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRiga III\u003c\/td\u003e\n\u003ctd\u003e9'8\"\u003c\/td\u003e\n\u003ctd\u003e10'6\"\u003c\/td\u003e\n\u003ctd\u003e7'7\"\u003c\/td\u003e\n\u003ctd\u003e102 sq ft\u003c\/td\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRiga IVs\u003c\/td\u003e\n\u003ctd\u003e9'8\"\u003c\/td\u003e\n\u003ctd\u003e13'10\"\u003c\/td\u003e\n\u003ctd\u003e7'7\"\u003c\/td\u003e\n\u003ctd\u003e~130 sq ft\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eRiga IV Black (this model)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e9'8\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e14'\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e7'7\"\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e135 sq ft\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003e2\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRiga V\u003c\/td\u003e\n\u003ctd\u003e9'8\"\u003c\/td\u003e\n\u003ctd\u003e17'6\"\u003c\/td\u003e\n\u003ctd\u003e7'7\"\u003c\/td\u003e\n\u003ctd\u003e165 sq ft\u003c\/td\u003e\n\u003ctd\u003e2+\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRiga XL series\u003c\/td\u003e\n\u003ctd\u003e9'8\"\u003c\/td\u003e\n\u003ctd\u003eUp to 30'+\u003c\/td\u003e\n\u003ctd\u003e7'7\"\u003c\/td\u003e\n\u003ctd\u003eUp to 300+ sq ft\u003c\/td\u003e\n\u003ctd\u003eMultiple\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the Riga IV Black greenhouse?\u003c\/strong\u003e\u003cbr\u003eThe Riga IV Black is a 135 sq ft, four-season polycarbonate greenhouse manufactured in Germany by Exaco. It features a black powder-coated aluminum frame, a crystal-clear 6mm polycarbonate front, and 8mm\/10mm twin-wall polycarbonate side and rear panels. It is rated to 100 mph winds and includes two automatic roof vents for year-round temperature regulation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy does the Riga IV have two roof windows instead of one?\u003c\/strong\u003e\u003cbr\u003eThe Riga IV's 14-foot length requires two roof windows to provide adequate ventilation across the full interior. A single roof window at one end would leave the far end of the greenhouse with insufficient airflow on hot days. The two automatic openers work independently, allowing the greenhouse to self-regulate temperature along its full length.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between the Riga IV and the Riga IVs?\u003c\/strong\u003e\u003cbr\u003eThe Riga IVs is the shorter \"S\" variant of the Riga IV series. Both models share the same 9'8\" width and 7'7\" height. Contact us for the specific length and pricing of the Riga IVs if you are comparing the two models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need the base kit (foundation frame)?\u003c\/strong\u003e\u003cbr\u003eThe base kit is strongly recommended for soil or lawn installations. The Riga IV base kit is a 6\" H × 116\" W × 168\" D aluminum frame buried in a trench and backfilled with soil to anchor the greenhouse and raise the interior height by 6\". Without a proper foundation, the greenhouse may shift over time. If installing on an existing concrete pad, the anchor option (+$99.99) may be more appropriate.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan the Riga IV Black handle heavy snow loads?\u003c\/strong\u003e\u003cbr\u003eYes — the \"onion\" arch profile sheds snow automatically. The Riga IV has been tested against winds up to 100 mph and has never been blown away when properly anchored with the base kit or anchor option.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does assembly take?\u003c\/strong\u003e\u003cbr\u003eAssembly takes approximately one full day for two people. Written instructions are included. The Riga assembly facilitation kit (metric tape, 10mm wrenches, ratchet straps, Boss 399 silicone caulk, window restraint cables) is available separately and contains all the specialized tools needed for the build.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the Riga IV Black expandable?\u003c\/strong\u003e\u003cbr\u003eNo — the Riga IV Black is a fixed-length model. If you anticipate needing more space in the future, consider the Riga XL series, which is designed to be expandable by adding additional sections.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat polycarbonate thickness does the Riga IV Black use?\u003c\/strong\u003e\u003cbr\u003eThe Riga IV Black uses three polycarbonate thicknesses: 6mm crystal-clear single-layer on the front and door for maximum light and visibility; 8mm UV-coated twin-wall on the sides and roof for insulation and durability; and 10mm twin-wall on the rear gable for added structural strength.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the Riga IV Black suitable for year-round growing in cold climates?\u003c\/strong\u003e\u003cbr\u003eYes. The twin-wall polycarbonate panels provide an insulation R\/K-value of up to 1.89, and the \"onion\" arch profile sheds snow without accumulation. The greenhouse is engineered for four-season use in cold climates, including regions with heavy snowfall and sub-zero temperatures.\u003c\/p\u003e","brand":"Exaco","offers":[{"title":"No - Skip Foundation Frame \/ No Upgrade","offer_id":59770804338974,"sku":"RIGA-IV-BLACK","price":10999.0,"currency_code":"USD","in_stock":false},{"title":"No - Skip Foundation Frame \/ Add Premium Upgrade","offer_id":59770804371742,"sku":"RIGA-IV-BLACK-UPG","price":13349.0,"currency_code":"USD","in_stock":false},{"title":"Yes \/ No Upgrade","offer_id":59519101731102,"sku":"RIGA-IV-BLACK-BASE","price":12498.0,"currency_code":"USD","in_stock":true},{"title":"Yes \/ Add Premium Upgrade","offer_id":59519101796638,"sku":"RIGA-IV-BLACK-UPG-BASE","price":14848.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1078\/1802\/5246\/files\/RigaBlack1.webp?v=1782582548","url":"https:\/\/rigagreenhousekit.com\/products\/riga-4-black-9x14-greenhouse","provider":"Riga Greenhouses","version":"1.0","type":"link"}