Riga XL 9 14 x 29 Greenhouse

Riga XL 9 Greenhouse — 14’ × 29’6” | 413 sq ft | Professional-Grade

The Riga XL 9 is the largest model in the Riga XL series — 413 sq ft of growing area in a 14-foot wide, 9'10" tall structure with 8 automatic roof openers for full-length ventilation control. Built for serious gardeners, plant enthusiasts, schools, and small commercial growers who need maximum capacity and professional-grade winter performance. Like all Riga XL models, it features 16mm triple-wall polycarbonate glazing (R/K-value up to 2.5), two Dutch doors (front and rear), and is expandable by adding additional sections. Designed, engineered, and manufactured in Germany by Exaco with 28 years of experience.

Ships in 1–2 weeks.

What’s Included — Basic Package

• 16mm UV-coated triple-wall polycarbonate glazing — significantly higher insulation than standard twin-wall models
• 8 roof windows with automatic openers — full-length ventilation control
• Two wide Dutch barn-style doors with keyed locks (37.5" W × 74" H) — one front, one rear
• First-class insulation — R/K-value up to 2.5
• Extremely heavy-duty aluminum frame construction
• 15-year warranty on aluminum frame
• 10-year pro-rated warranty on polycarbonate panels (pro-rated after year 5)

Build Your Package — Available Add-Ons

Riga XL Series Comparison — XL 6 vs. XL 9

Both XL models share the same 14' width, 9'10" peak height, 16mm triple-wall glazing, R/K-value 2.5, and two Dutch doors. The XL 9 adds 9'8" of length, 133 sq ft of growing area, and 4 additional automatic roof openers. Both are expandable by adding sections.

Riga XL vs. Standard Riga Series

Frequently Asked Questions

Why does the Riga XL 9 have 8 roof windows?
The 29'6" length of the Riga XL 9 requires 8 automatic roof openers to provide adequate ventilation across the full interior. Each opener covers a section of the greenhouse, allowing independent temperature regulation along the full length. Without sufficient roof ventilation, the far ends of a long greenhouse can overheat on warm days even when the center is comfortable.

Is the Riga XL 9 suitable for schools and educational programs?
Yes — the Riga XL 9 is well-suited for school greenhouse programs, horticultural education, and community growing projects. The 413 sq ft interior provides ample space for multiple growing stations, the 9'10" peak height accommodates tall plants and vertical growing systems, and the front and rear Dutch doors allow easy access from both ends for classroom groups. The 15-year frame warranty and professional-grade construction make it a sound long-term investment for institutional use.

What is the difference between the Riga XL 9 and the Riga XL 6?
Both models share the same 14' width, 9'10" peak height, 16mm triple-wall glazing, R/K-value 2.5, and two Dutch doors. The XL 9 is 9'8" longer (29'6" vs. 19'10"), adds 133 sq ft of growing area (413 vs. 280 sq ft), and includes 8 automatic roof openers vs. 4. The XL 9 base kit costs $3,149 vs. $2,199 for the XL 6. Choose the XL 6 if 280 sq ft meets your needs; choose the XL 9 for maximum capacity.

Is the Riga XL 9 expandable?
Yes — the Riga XL series is designed to be expanded by adding additional sections. Contact us to discuss expansion options and pricing for your specific configuration.

Do I need the base kit?
The heavy-duty I-beam base kit (+$3,149) is strongly recommended for soil or lawn installations. It provides a robust foundation appropriate for the large footprint and heavy construction of the XL 9. If installing on an existing concrete pad, contact us to discuss anchoring options.

How long does assembly take?
Assembly requires 2–3 people and approximately 2 full days. Written instructions are included. Due to the scale and weight of the XL 9 components, we recommend 3 people and the Riga assembly facilitation kit (metric tape, 10mm wrenches, ratchet straps, Boss 399 silicone caulk, window restraint cables), available separately.