Mount Shasta GreenHouse – 30′ Wide Straight Wall, Quonset Roof Style
Mount Shasta Greenhouse
The Mount Shasta greenhouse profile stands out as our most sought-after greenhouse, preferred by farmers. This 30 x 100 straight wall, quonset roof greenhouse comes equipped with 2.38OD 13-gauge metal hoops. The spacing is configured at 5ft on center, featuring (5) runs of 1.38OD 16-gauge purlins, all securely attached with premium aluminum cross connectors.
Straight Wall, Quonset Roof Greenhouses (Recommended for High Wind Areas)
Our most popular design, the straight wall, quonset roof greenhouse profile combines vertical sidewalls for usable growing space with a Quonset arch roof for strength and airflow.
Straight Sidewalls – Perfect for shelving, trellising, or tall crops.
Quonset Arch – Smooth airflow, even light distribution, and material efficiency.
Wind Resistance – Engineered to perform in high wind climates.
Efficient Climate Control – Lower air volume allows faster heating, cooling, and ventilation.
T3 Greenhouses
American-Made. Built for Growers. Engineered to Last.
At T3 Greenhouse Supply, we manufacture high-performance greenhouse kits for commercial agriculture, homesteading, licensed hemp cultivation, and backyard growing.
From 10×12 backyard greenhouses to 35-foot-wide commercial houses and full gutter-connect projects, every T3 structure is built from heavy-duty U.S.-made galvanized steel, engineered to last decades in the harshest climates. Our greenhouses are automation-ready and can run ventilation, irrigation, heating, cooling, and light deprivation systems— with optional off-grid solar power.
💪 T3 Greenhouses Outperform the Rest
🇺🇸 U.S.-Made Heavy-Duty Galvanized Steel – 2-3/8″ and 1-5/8″ structural tubing for maximum strength and longevity.
Optional Powder Coating – Adds style and enhanced corrosion resistance.
High-Performance Plastics – String-reinforced poly film for outer layers, 6 mil clear poly for double-inflation insulation.
Automation-Ready – Integrates with automated greenhouse controllers for precise climate management.
Off-Grid Capable – Solar power packages for farms, homesteads, and remote growing locations.
Custom Engineering – Wet-stamped plans available in all 50 states for agriculture and licensed cultivation facilities.
Automation & Off-Grid Options
Automating a year-round gothic-style greenhouse takes everything good about the design and supercharges it. With automated ventilation, evaporative cooling, heating, and smart controls, you have a setup that can thrive in blazing summers or freezing winters. With the right system, the internal climate adapts hour by hour—without you lifting a finger. These greenhouses are built for growers who want consistency and control without babysitting the thermostat. Whether you’re growing leafy greens in Montana or tropical plants in Texas, this style delivers stable growing conditions and peace of mind.
🌾 Built for Every Type of Grower
Commercial Agriculture – Vegetables, fruits, berries, flowers, herbs, nursery crops.
Specialty Crops – Hemp and other high-value plants.
Backyard & Homestead Growers – Year-round food, flowers, and personal crops.
Schools & Community Gardens – Educational, sustainable agriculture projects.
Light Deprivation Systems
Our Interior Light Dep Systems are engineered for hemp and photoperiod-sensitive crops:
Heavy-duty U.S. steel frames for structural strength.
Dual output motorized blackout curtains for smooth, reliable coverage.
Integrates with automated greenhouse controllers for timed cycles or manual operation.
Designed for precision light control to maximize yields.
Ventilation and Cooling Packages
UL-Listed Exhaust Fans – Sized to match your greenhouse:
36" Fans for 20- and 24-foot-wide models.
50" Fans for 30- and 35-foot-wide models.
20" HAF Fans – Provide maximum air throw to eliminate hot spots and strengthen stems.
Wet Wall Cooling Systems – Various sizes available; we recommend 4x20 wet walls for 30- and 35-foot-wide greenhouses.
Wet Wall Light Traps – Optional blackout covers for wet wall systems.
Heating Solutions
LB White 120 Plus & 220 Plus Heaters – High-efficiency heating designed specifically for greenhouses.
Available in outside end wall mount or interior mount configurations.
Perfect for year-round production in colder regions.
Greenhouse Plastics & Endwall Coverings
String-Reinforced Poly Film (10 mil) – Tough, tear-resistant greenhouse covering for long-term durability.
6 Mil Clear Poly Film – Used as the lower layer in double-inflation systems for added insulation.
Polycarbonate Endwalls – Long-lasting, rigid protection with excellent light transmission.
Polycarbonate + Metal Endwall Options – For added durability, security, and weather resistance.
Channel & Wiggle Wire Fastening – Aluminum channel with PVC-coated or galvanized wiggle wire for a secure, professional fit.
Solar Power Packages
Operate your greenhouse entirely off-grid.
Automation Options
Automated Greenhouse Controllers – Control ventilation, heating, irrigation, cooling, and light dep.
Irrigation & Misting Systems – Climate or timer-controlled for consistent plant health.
Remote Monitoring – Adjust systems from anywhere via your phone or computer.