Riga 4 9x14 Greenhouse
Riga Standard: 9x14
- 1 Top Shelf
- 1 Bottom Shelf
- 16" Intake Shutter Vent
- 12" Exhaust Fan
- Manual Dial Thermostat
- 4 Heavy Duty Seed Trays
- 10 Stainless Steel Hooks
- 10 Heavy Duty Plastic Hooks
- 1 Assembly Facilitation Kit
- 135 sq ft of Growing Area
- 2 Roof Vents
- 1 Rear Wall Window
- Dutch Door
- Keyed Lock
- Front Gable: 10mm Translucent single layer polycarbonate panels
- Rear Gable: 10mm Translucent twin-wall polycarbonate panels
- Sides and Roof: 8mm UV-coated translucent twin-wall polycarbonate panels
Riga 4 (Riga IV) 9x14 Greenhouse
The Riga 4 is the mid-to-large model in the Riga series — 135 sq ft of growing area in the same 9'8" wide footprint as the Riga 3, extended to 14 feet in length. It is the first Riga model to include two automatic roof openers, providing superior ventilation for the longer interior. Designed, engineered, and manufactured in Germany by Exaco with 28 years of experience, the Riga 4 is built for serious year-round growing with the same “onion” arch profile, 100 mph wind rating, and premium polycarbonate glazing as the rest of the Riga lineup.
What’s Included — Basic Package
- 8mm UV-coated translucent twin-wall polycarbonate panels — sides and roof
- 10mm translucent twin-wall polycarbonate panels — front and rear gables (added strength)
- 2 roof windows (40" W × 24" D each) with automatic openers
- 1 oversized rear wall window (30" W × 42" H) with adjustment arm
- Heavy-duty Dutch barn-style door with keyed lock (30" W × 72" H)
- First-class insulation — R/K-value up to 1.89
- 15-year warranty on aluminum frame
- 10-year pro-rated warranty on polycarbonate panels
Riga Series Comparison - Which model is best for you?
| Model | Width | Length | Height | Area | Starting Price |
|---|---|---|---|---|---|
| Riga 2s | 7'4" | 7' | 7' | ~48 sq ft | $4,699.00 |
| Riga 3s | 7'8" | 10'6" | 7'1" | 81 sq ft | $5,099.00 |
| Riga 3 | 9'8" | 10'6" | 7'7" | 102 sq ft | $5,399.00 |
| Riga 4s | 9'8" | 13'10" | 7'7" | ~130 sq ft | $5,599.00 |
| Riga 4 | 9'8" | 13'10" | 7'7" | ~130 sq ft | $7,999.00 |
| Riga 5 | 9'8" | 17'6" | 7'7" | 165 sq ft | {{price_riga_5}} |
| Riga XL series | 9'8" | Up to 30'+ | 7'7" | Up to 300+ sq ft | $18,499.00 |
Frequently Asked Questions
Why does the Riga 4 have two roof windows instead of one?
The Riga 4 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.
What is the difference between the Riga 4 and the Riga 4s?
The Riga 4s is the shorter “S” variant of the Riga 4 series. Both models share the same 9'8" width and 7'7" height.
Do I need the foundation frame?
The base kit is strongly recommended for soil or lawn installations. The Riga 4 foundation frame 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.
Can the Riga 4 handle heavy snow loads?
Yes — 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.
How long does assembly take?
Assembly 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.
Is the Riga 4 expandable?
No — the Riga 4 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.
| Height | 7' 7" |
| Width | 9' 8" |
| Length | 14' |
| Growing Area | 135 sq ft |
| Frame | Anodized Aluminum |
| Frame Color | Silver |
| Door Type | Dutch Door |
| Latch | Keyed Lock |
| Door Dimension | 30" W x 72" H |
| Front Glazing Type | Translucent single layer polycarbonate panels |
| Front Glazing Thickness | 10mm |
| Rear Glazing Type | Translucent twin-wall polycarbonate panels |
| Rear Glazing Thickness | 10mm |
| Sides & Roof Glazing Type | UV-coated translucent twin-wall polycarbonate panels |
| Sides & Roof Glazing Thickness | 8mm |
| Extendable | No |
| Anchor Options | Wood, Concrete, Dirt (Foundation Frame Required) |
| Snow Rating | Yes - onion arch profile prevents snow accumulation |
| Wind Rating | Tested to 100 mph |