Mount Shasta GreenHouse – 30′ Wide Straight Wall, Quonset Roof Style
🏡 Mount Shasta Greenhouse
The Mount Shasta Greenhouse is a 30×100 commercial greenhouse preferred by farmers who need maximum space, strength, and production capacity.This 30 x 100 straight wall, quonset roof greenhouse comes with 2.38OD 13-gauge metal hoops. The spacing is set at 5ft on center, using (5) runs of 1.38OD 16-gauge purlins, all securely attached with premium aluminum cross connectors.As a result, the Mount Shasta Greenhouse delivers a strong balance of space, durability, and efficient climate control.
Straight Wall, Quonset Roof Greenhouses
Our most popular design, the straight wall, quonset roof greenhouse profile combines vertical sidewalls for usable growing space with a Quonset arch roof, giving you strength and better airflow.
Straight Sidewalls –Straight sidewalls give you full vertical growing space. This means you can install shelving, trellising, or support taller crops without wasting space.
Quonset Arch – Smooth airflow, even light distribution, and material efficiency.
Wind Resistance – Built to perform in high wind climates, while also maintaining efficient climate control.
Efficient Climate Control – Lower air volume allows faster heating, cooling, and ventilation.
🇺🇸 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 systems, T3 builds for every scale. Each structure uses heavy-duty U.S.-made galvanized steel, engineered to last for decades in harsh climates.Our Greenhouses are automation-ready, so you can run ventilation, irrigation, heating, cooling, and light deprivation systems— with optional off-grid solar power.
💪 T3 Greenhouses Outperform the Rest
Here’s what sets these structures apart from standard greenhouse kits:
🇺🇸 U.S.-Made Heavy-Duty Galvanized Steel – 2-3/8″ and 1-5/8″ heavy-duty tubing for strength and long-term durability.
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 – Works 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, your system performs in extreme conditions. Whether it’s blazing summers or freezing winters, it maintains stable internal temperatures year-round. With the right system, the internal climate adapts hour by hour, so you get consistent results without lifting a finger. These Greenhouses are built for growers who want consistency and control without constantly adjusting 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 crops.
- Backyard & Homestead Growers – Year-round food, flowers, and personal crops.
- Schools & Community Gardens – Educational, sustainable agriculture projects.
Light Deprivation Systems
• Heavy-duty U.S. steel frames for structural strength
• Dual output motorized blackout curtains for smooth, reliable coverage
• Works with automated greenhouse controllers for timed cycles or manual operation
• Designed for precision light control to maximize yields
Ventilation and Cooling Packages
• 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 4×20 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
• Turn Sunlight Into Savings – Harness clean, renewable energy to power your greenhouse or home while cutting utility costs.
• Plug-and-Grow Ready – Pre-wired systems integrate seamlessly with T3 greenhouses, light dep motors, and irrigation automation.
• Expandable Power Options – Scalable packages from off-grid setups to full-power commercial arrays for any growing operation.
• Built for Growers – Weather-resistant, high-efficiency panels and smart inverters designed for year-round reliability.
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.