TMG Heavy Series™ 8' x 20' Greenhouse Kit with Galvanized Steel Frame, Polycarb Roof and Crystal-Clear Walls TMG-GH821

Name: TMG Heavy Series™ 8' x 20' Greenhouse Kit with Galvanized Steel Frame, Polycarb Roof and Crystal-Clear Walls TMG-GH821
Brand: TMG Industrial
SKU: TMG-GH821
Price: 2499.0 CAD
Availability: InStock
Rating: 4.90909090909091 (11 reviews)

8' x 20' Greenhouse with Galvanized Steel Frame, Polycarbonate Twin-Wall Roof and Crystal-Clear Solid Walls

CURRENTLY IN STOCK

SKU TMG-GH821

$2,499.00 CAD - $2,499.00 CAD

$2,499.00 CAD

$2,499.00 CAD - $2,499.00 CAD

$2,499.00 CAD

FREE

shipping to most locations in

Canada

Delivered in 10 to 15 business days

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Quantity

1-877-761-2819

cs@tmgindustrial.ca

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TMG Heavy Series™ 8' x 20' Greenhouse Kit with Galvanized Steel Frame, Polycarb Roof and Crystal-Clear Walls TMG-GH821

Quantity

Durable & Weather-Resistant

The galvanized steel frame resists rust and corrosion, ensuring long-lasting outdoor use.

Warm & Energy-Efficient

Twin-wall 4 mm polycarbonate roof panels trap solar heat and diffuse sunlight to keep plants cozy.

UV-Protected & Naturally Bright

Crystal-clear panels let in sunlight while blocking UV rays—no need for artificial lighting.

Spacious & Accessible

A wide 44" door provides easy access for tools, carts, and new plants.

Ventilated & Simple to Assemble

Manual roof vents control airflow, and the panels lock into place for quick setup.

Exact floor footprint: 7-4/5’ (W) x 19-2/3’ (L)
Sidewall height: 69”
Ridge height: 97”
Truss spacing: 39”
Bi-parting swing open door: 44” (W) x 78” (H)
4mm Polycarbonate twin-wall roof panels and 2mm clear solid wall panels
Roof vents: 2

The TMG-GH821 Greenhouse is a high-quality solution for backyard gardeners and commercial growers looking to extend their growing season. Featuring UV-protected 4 mm twin-wall polycarbonate panels, this greenhouse allows sunlight to diffuse evenly while protecting plants from harsh weather. The crystal-clear poly walls not only support healthy plant growth but also give the structure a clean, modern look that blends beautifully into any backyard setting. A galvanized steel frame with ground base bars provides a stable and durable structure, ideal for year-round use in a variety of climates. With approximately 160 square feet of growing space, there's plenty of room for vegetables, herbs, flowers, and seedlings to thrive. Manual roof vents help regulate airflow and temperature, while the greenhouse design retains solar heat to create a warm, consistent environment. The TMG-GH821 offers a professional growing space built for lasting performance and healthy plant development. TMG Industrial carries a wide variety of cold frame tunnel greenhouse grow tents designed for needs from a backyard hobby gardener to a sizeable commercial produce grower. With over 30 different sizes and styles available, TMG Industrial has become one of the leading cold frame greenhouse distributors within Canada and the USA. Other greenhouse models: TMG Industrial Greenhouses

Your order will be shipped from one of our main warehouses in Canada. Typically, we process and ship orders within 2 to 3 business days. Delivery time varies based on your location and accessibility, with most orders arriving within 10 to 15 business days.

This product is packed in a wood crate shipping box
Shipping dimension: 87” x 45” x 16” (L x W x H)
Shipping weight: 635 lb

Shipping from Richmond, BC, or Mississauga, ON

What happens after you place your order?

We know that when you invest in equipment, you're counting on it to perform day in and day out. At TMG Industrial, that trust means everything to us. That’s why we include a 1-year Warranty with every product we sell—because you deserve confidence with every purchase.

Our warranty is there to make sure your equipment stays reliable across the seasons, covering any issues caused by manufacturing defects in materials or workmanship. From fieldwork to property maintenance, you can count on your TMG equipment to deliver.

More than just warranty coverage, we’re committed to supporting you throughout the life of your machine. Our customer service team is here to help, whether you need technical advice, troubleshooting, or parts support.

For full warranty terms, please see our warranty policy