Riga Mark VIII Greenhouse

This greenhouse is 14′ wide by 26′ long by 10′ high.
The Riga Mark VIII is truly a greenhouse designed to grow in the middle of winter! The Riga Mark VIII is not just a season extender greenhouse. The unique RIGA design prevents snow build up, allows for maximum inside head room, and minimizes wind resistance. Riga Mark VIII has an amazing 15 year warranty on the frame and 10 years on the panels. Riga Greenhouses have beautiful and practical designs combined with quality, long-lasting parts and pieces.


This commercial quality greenhouse has 368 SF of growing space. Easy assembly makes the Riga Mark VIII Greenhouse a great solution for institutions looking for a do-it-yourself greenhouse or serious gardeners looking for lots of room to grow.

Easy to Assemble

The Riga Mark VIII greenhouse features a sturdy rustproof, extruded aluminum frame. The unique “channel” design of the aluminum components allows for simple “slide and fit” assembly, thus saving time and money. Easy to understand step by step assembly instructions are included with every structure.


With the thickest twin wall polycarbonate offered on a backyard greenhouse, the Riga Mark VIII hobby greenhouse carries the highest R factor of any hobby greenhouse on the market. This makes the Riga less expensive to heat.


Most hobby greenhouses manufactured today offer 4mm or 6mm polycarbonate covering. The Riga Mark VIII hobby greenhouse carries the highest R factor of any hobby greenhouse on the market. It is covered with sturdy 16mm twin wall polycarbonate. This kind of covering provides better insulation making your Riga greenhouse easier to keep cool in the summer and warm during the winter months. The “onion” shape helps shed heavy snow loads.

Doors and Vents

The extra wide 30″ heavy duty dutch door with keyed lock is wide enough to easily pass a wheel barrow through. The extra wide 40″ x 24″ automated roof window(s) and oversized 30″ x 42″ gable end window maximize the benefits of natural ventilation.

Optional Base Kit

Heavy-duty 6″ tall extruded aluminum base for the Riga Mark VIII Greenhouse. Base can be placed directly on ground and if you choose, can be filled with sand, peagravel or concrete. Greenhouse frame slides directly onto base.



Dimensions 14′ W x 26′ 3″ L x 9′ 10″ H
Sidewall 3′
Frame Heavy Gauge Extruded Aluminum
Color Silver
Covering 16mm Twinwall Polycarbonate Panels
Door(s) 2ea. – 30″ W x 6′ H – Heavy Duty Dutch Door with Keyed Lock
Roof Vents 4ea. – 40″ x 24″ (Automatic)
End Vents 1ea. – 30″ x 41″
Side Vents 0
Base Optional
Foundation Options – Stakes; Treated 4×4’s; Concrete Piers or Slab
Warranty Frame – 15 years; Covering – 10 years
Manual Included

Additional information

Weight 400 lbs
Dimensions 48 × 96 × 24 in


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