Riga 3s 7x10 Greenhouse

Riga 3s (Riga IIIs) 7x10 Greenhouse

The Riga 3s is the second-smallest model in the Riga greenhouse series — a compact 81 sq ft structure built for serious year-round growing in limited-space gardens. Designed, engineered, and manufactured in Germany by Exaco with 28 years of experience, the Riga 3s features the signature “onion” arch profile that sheds snow automatically, maximizes interior headroom, and minimizes wind resistance. Tested against winds up to 100 mph and never blown away when properly anchored.

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)
• 1 roof window (40" W × 24" D) with automatic opener
• 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 3s vs. Riga 3 — Which Is Right for You?

Both models share the same length (10'6"), glazing system, and German manufacturing. The Riga 3 is 2 feet wider and 6 inches taller — a meaningful difference in interior working space and growing capacity. If your site can accommodate the extra width, the Riga 3 is the better long-term investment.

Riga Series Comparison

Frequently Asked Questions

What is the difference between the Riga 3s and the Riga 3?
The Riga 3s is 7'8" wide × 10'6" long × 7'1" tall with 81 sq ft of growing area. The Riga 3 is 9'8" wide × 10'6" long × 7'7" tall with 102 sq ft. Both share the same length and glazing system, but the Riga 3 is 2 feet wider and 6 inches taller — offering significantly more interior working space. The Riga 3s is the better choice for narrow lots or tight side yards where the extra width won’t fit.

Do I need the base kit (foundation frame)?
The base kit is strongly recommended for soil or lawn installations. The Riga 3s base kit is a 6" H × 92" W × 126" 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.

How does the automatic roof opener work?
The automatic roof opener uses a wax-cylinder mechanism that expands and contracts with temperature changes — no electricity required. When the interior temperature rises above a set threshold (typically around 65–70°F), the opener automatically pushes the roof window open to ventilate. When the temperature drops, it closes automatically.

Can the Riga 3s handle heavy snow loads?
Yes — the “onion” arch profile sheds snow automatically. Snow slides off the curved surface rather than accumulating, preventing the structural loading that causes flat-roof greenhouses to collapse. The Riga 3s has been tested against winds up to 100 mph and has never been blown away when properly anchored.

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 3s expandable?
No — the Riga 3s is a fixed-length model and cannot be extended. If you anticipate needing more space in the future, consider the Riga XL series, which is designed to be expandable by adding additional sections.