Exaco RIGA Extra Large Polycarbonate Greenhouse 16'5''x14'

RIGA Extra Large Polycarbonate Greenhouse – Built for Year-Round Growing

Designed for serious gardeners, the RIGA Large Polycarbonate Greenhouse offers unmatched insulation, superior durability, and innovative features that make growing food effortless—even in harsh winter conditions. Crafted in Germany with precision engineering, this greenhouse ensures your plants thrive while keeping heating costs low.

The Extra Large Riga Greenhouse Professional series comes in five sizes:

• RIGA XL 5 -  231 sq.ft. 14' W x 16'5" L x 9'10" H
• RIGA XL 6 - 280 sq.ft.   14' W x 19'10" L x 9'10" H
• RIGA XL  7 - 322 sq.ft. 14' W x 23' L x 9'10" H
• RIGA XL 8  - 368 sq.ft. 14' W x 26'3" L x 9'10" H
• RIGA XL 9  - 413 sq.ft.  14' W x 29'6" L x 9'10" H

Why Choose the RIGA Greenhouse?

Winter-Ready Insulation 

Unlike standard greenhouses, RIGA’s twin-wall polycarbonate glazing provides exceptional insulation, keeping plants safe during extreme cold. Twin-wall polycarbonate glazing functions like a double-pane window, significantly enhancing heat retention. The 16 mm polycarbonate glazing reduces heating costs significantly compared to a greenhouse of the same size using 4mm single-layered glass.

Heavy-Duty Construction

With an anodized aluminum frame and durable rubber seals, this greenhouse stands strong against severe winds and heavy snow loads. Designed with extreme climates in mind, this greenhouse features heavy-duty rubber seals along all openings, ensuring an airtight structure that prevents heat loss and keeps out moisture. The reinforced roof design efficiently directs heavy snow loads downward, minimizing stress on the frame, while its aerodynamic shape allows strong winds to pass over, reducing the risk of damage.

Optimized Design for Maximum Light

Its unique shape slopes on the outside so that heavy snow loads slide down and severe winds blow over the greenhouse.  The onion-shaped greenhouse minimizes shade and maximizes light transmission, ensuring healthy plant growth. The twin-wall polycarbonate glazing diffuses sunlight, spreading it evenly throughout the greenhouse. This reduces the risk of leaf burn and ensures uniform growth conditions.

More Ventilation, More Control

Comes with oversized roof windows, an extra-large rear wall window, and a 30" wide Dutch barn-style door with a key lock for superior airflow. The large roof windows come equipped with automatic openers, which respond to temperature changes. As the greenhouse warms, the vents open to release excess heat—no electricity required.

The combination of roof vents, side glazing, and door venting ensures a balanced airflow system, preventing overheating during sunny days and maintaining warmth during colder seasons. This natural regulation minimizes the need for artificial cooling or heating, saving energy and reducing costs.

Premium Materials for Long-Lasting Performance

• Glazing 16mm triple-wall polycarbonate (side walls and gable ends)
• Frame 13 gauge aluminum extrusions
• Automatic Roof Window Openers for temperature regulation without electricity
• Smooth Anodized Aluminum Frame for durability and weather resistance
• Heavy-duty rubber Seals to lock in warmth and prevent moisture leaks

More Than Just a Greenhouse—It’s an Investment

Whether you're growing fresh vegetables, protecting delicate plants, or enjoying a backyard retreat, the RIGA Extra Large Polycarbonate Greenhouse from South Table Sheds delivers the best in quality and performance. Its professional-grade materials ensure longevity, while its thoughtful design makes gardening effortless.
Start growing smarter, not harder—order your RIGA greenhouse today!

Specifications

Glazing: 16mm triple-wall polycarbonate (side walls and gable ends)
Frame: 13 gauge aluminum extrusions

	Riga XL5	Riga XL6	Riga XL7	Riga XL8	Riga XL9
Area	231 sq. ft	280 sq. ft.	322 sq. ft.	368 sq. ft.	413 sq. ft.
Length	16'5''	19'10''	23'	26'3''	29'6"
Width	14'	14'	14'	14'	14'
Peak Height	9'10''	9'10"	9'10"	9'10''	9'10''
Doors	2 large barn style doors with locks	2 large barn style doors with locks	2 large barn style doors with locks	2 large barn style doors with locks	2 large barn style doors with locks
Door Size	37.5" W x 74" H	37.5" W x 74" H	37.5" W x 74" H	37.5" W x 74" H	37.5" W x 74" H
Roof Windows	4 roof windows	4 roof windows	6 roof windows	6 roof windows	8 roof windows
Window Size	37.5" W x 39.5" H	37.5" W x 39.5" H	37.5" W x 39.5" H	37.5" W x 39.5" H	37.5" W x 39.5" H

 

Optional Accessory Kit

Top Shelf 

• 10" wide size for TOP
• Length varies per greenhouse/size

Bottom Shelf

• 25" wide size for BOTTOM
• Length varies per greenhouse/size

Foundation Frame

• Foundation frame is buried in a trench when greenhouse is not anchored to concrete
• Available for all sizes of Riga Greenhouses (price varies by size/model)

Packaging, Shipping and Delivery

Packaging and Shipping

• Greenhouse -1 box and 1 big crate
• Foundation Frame 
  • XL6           2 boxes: #1 20' long,  #2 14' long goes on top of the main pallet)
  • XL7/XL8   3 boxes: all up to  14' long go on top of the main pallet 
  • XL9          4  boxes: all up to  14' long go on top of the main pallet
    

• Freight transit is typically 7 to 10 days. 
• For more remote locations, it could be slightly longer.  If you need a greenhouse to ship sooner, let us know.

Delivery

•  CURBSIDE DELIVERY.  Anything more than that – i.e. flatbed/forklift or up the driveway may incur additional charges.
• All our deliveries are trucks with a liftgate.  When needed we can request a flatbed/forklift but often not necessary.  If there is any concern, it is generally best to order a flatbed/forklift if available, but often not necessary.
• The carrier will call the customer for a delivery appointment when it reaches the destination terminal.
• The customer should be there to receive the delivery and notify us if there is any damage. 
• Do not refuse deliveries – we will send replacement parts. 
• Let us know asap if you do see damage. It will be quicker for us to send replacement parts.

 Assembly

• The greenhouse kit comes with an assembly guide
• South Table Sheds can recommend name/phone numbers of assembly technicians
• South Table Sheds can be hired for assembly in the Denver, CO area. Please contact us for more information.
• Level of Effort
  • Installation requires two people minimum
  • Not considering site preparation – the assembly should take between 6-10 hours, depending on how many shelves are bought and/or the foundation frame is added.

 

Assembly Guide

Assembly Video

 

Warranty

Limited Product Warranty – Polycarbonate Greenhouses

This product carries a limited warranty, which covers the following:

•  Aluminum frame and stainless steel hardware ­(up to 15 years from date of purchase)
• Triple-wall polycarbonate glazing (up to 15 years from date of purchase) and twin-wall polycarbonate glazing (up to 10 years from date of purchase, prorated beginning 5 years from date of purchase)
• Defects in material and workmanship when properly assembled using only manufacturer’s original equipment parts in accordance with manufacturer’s assembly instructions (up to 10 years from date of purchase)

Exclusions:

 

This warranty does NOT cover the following components, for which replacement parts may be provided at a reasonable cost:

 

• Operating parts such as pistons in automatic window openers
• Other accessories provided with the greenhouse which are breakable in ordinary use

 

The warranty does NOT cover damage resulting from any of the following:

 

• Excessive loads placed on the packed product and/or parts (beyond reasonable expectations)
• Glazing breakage caused by large hail, rocks or other projectiles (including rocks thrown by a lawnmower)
• Use of force, incorrect handling, or inappropriate use, neglectful use or assembly or maintenance, commercial use or use other than for personal or household purposes
• Alteration, painting, connecting, gluing, sealing or assembly not in accordance with the manufacturer’s instructions
• Extreme storms, wind, flood, fire, overaccumulation of snow load, or other extreme weather conditions

 

Snow Load Advisory:

 

Customers who purchased a polycarbonate greenhouse are expected to regularly clear snow accumulation from the roof of their greenhouse as overaccumulation may crush the structure.  This type of damage is not covered under this warranty.

 

 

 

Commencement and Transferability

 

This warranty commences from the date of purchase and is non-transferable. A dated proof-of-purchase must be presented upon request. Customers are advised to keep this product warranty and proof of purchase in a secure place as they will be needed to process any claims.

 

Claims Process:

 

Address your claim to the customer service department by phone or email. A photograph or sample of the defective part(s) may be required to expedite the resolution process. If needed, the customer will allow the manufacturer or its representative to access and/or examine the greenhouse and its parts at the original service location. After a claim has been settled the guarantee will continue to run to its original expiry date (the original date of purchase). Exaco will repair or replace the product at our discretion.

 

Customer Satisfaction:

 

Ultimately, we strive to make every customer happy. We will do our utmost to resolve any warranty related issues in a manner satisfactory to the customer.