8' x 20' Greenhouse with Galvanized Steel Frame, Crystal-Clear Walls Skip to content
SKU TMG-GH821

8' x 20' Greenhouse with Galvanized Steel Frame, Polycarbonate Twin-Wall Roof and Crystal-Clear Solid Walls TMG-GH821

SKU TMG-GH821

8' x 20' Greenhouse with Galvanized Steel Frame, Polycarbonate Twin-Wall Roof and Crystal-Clear Solid Walls TMG-GH821

Original price $2,499.00 CAD - Original price $2,499.00 CAD
Original price
$2,499.00 CAD
$2,499.00 CAD - $2,499.00 CAD
Current price $2,499.00 CAD
CURRENTLY IN STOCK
FREE SHIPPING TO MOST LOCATIONS IN CANADA* Learn More
DELIVERED IN 10-15 BUSINESS DAYS

Other financial options:

645.0 lb
87 x 45 x 16 inches
More Shipping Info
  • Residential or commercial growing solution for your sprouts, seedlings & flowers
  • Twin wall polycarbonate panels diffuse direct sunlight to keep your plants warm
  • Galvanized square tube + ground base bars are rust resistant & corrosion free
  • 44” wide door for easy transport of tools, materials, carts & wheelbarrows
  • Simple sliding lock assembly
Product Manual

Features

Durable & Weather-Resistant

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

Warm & Energy-Efficient

Twin-wall 4 mm polycarbonate 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.

Specifications

  • 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)
  • Polycarbonate twin-wall roof and clear solid walls
  • Roof vents: 2

Shipping Information

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: 645 lb
Shipping from Richmond, BC, or Mississauga, ON
What happens after you place your order?
8' x 20' Greenhouse with Galvanized Steel Frame, Polycarbonate Twin-Wall Roof and Crystal-Clear Solid Walls TMG-GH821-shipping-info-image

Product Description

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

Warranty

Back to Top
01
In-Store Pickup orders are ready by appointment only, 24 hours after payment has been received
02
Credit card owner must be on site with ID and credit card used to place the order
03
If the order is arranged for a third party pickup (a freight company, family members or friends), the order must be paid through EFT (electronic fund transfer).
CALL TO ORDER
Hours: Mon-Fri 9AM-4PM local time
In-Store Pickup orders must be picked up within 5 business days, after which the discount price is voided.

Warehouse Pick-up Price Promo



Only to in-person self-pickup at our Warehouses in Richmond, Montreal and Mississauga

This offer is not applicable with any other promotions or for online orders, and is limited to one item per person only.

Please note that prices are subject to change.
VIEW ALL DEALS
Hours: Mon-Fri 9AM-4PM local time
Liquid error (layout/theme line 282): Could not find asset snippets/cyber-monday-popup.liquid