q model quonset building for agricultural use

Professional Grow Rooms & DIY Indoor Farming

The global legal marijuana market is expected to reach $146.4 billion by the end of 2025, according to Grand View Research. As the legal marijuana industry continues to grow, cultivation companies are investing large amounts into building more grow houses.

SteelMaster’s prefabricated buildings are the perfect buildings to accommodate your indoor farm and keep your valuable growing equipment safe.

One Hundred Percent Usable Space

One of the biggest advantages of using a SteelMaster Quonset Hut as a grow house is that there are no beams or trusses. Instead of making renovations to an existing building, you can create your own custom grow room design plans. The layout of the grow building is completely up to you, the customer. Your building can be designed to be a full-room grow house or divided up into different rooms.

Taking advantage of the limitless interior space can be very beneficial to growers. A SteelMaster metal warehouse can be used as an all-in-one growing facility, extraction lab, and distribution center. Because of the unlimited interior space, vehicles can easily access the building for loading and unloading.


SteelMaster’s metal structures are one of the most cost-efficient options on the market, especially when it comes to labor costs. You don’t need to be a construction expert to put together one of our buildings. Our prefabricated arches are pre-punched and pre-drilled at our factory before they are delivered to your job site. When the kit arrives, you’ll receive most of what you need to put it together with just the help of a small crew depending on the size of the building.

According to Buildings Guide, the average commercial building cost is between $16 and $20 per square foot. SteelMaster offers steel buildings in a variety of sizes ranging from 10’ to 150’ in width, and the price of each building is approximately $8 to $12 per square foot.

SteelMaster’s metal buildings come in a variety of sizes and can be customized for grow operations of all sizes. When your business expands, your building can as well—without the costly renovations. Our buildings can easily expand with the addition of extra steel panels to the existing structure.

Durability & Strength

SteelMaster’s metal Quonset Huts are noted for their durability and longevity, especially when it comes to disaster resistance. Our buildings are able to withstand extreme weather conditions including high winds, severe snowstorms, hurricanes, and earthquakes. Our steel prefabricated buildings are sold worldwide and can adapt to any climate. They can withstand corrosion in highly humid environments, whereas wood buildings can get moist and rot.

Unlike steel buildings, grow tents have a limited lifespan. The fabric rests on supporting poles, causing the roof seams to sustain some of the tent’s weight. Over time, this can cause wear and tear to the fabric. Plus, the lightweight frames of grow tents can limit the type and amount of hanging equipment a tent can safely support. Because our buildings are some of the strongest on the market, they can easily support the weight of lighting and ventilation equipment.

While fabric grow tents may be less expensive, they must constantly be cleaned to avoid mold and pests. The overlapping metal arch design of our prefabricated steel buildings makes it almost impossible for pests and other animals to get inside. Steel buildings require little to no maintenance after assembly. This is because of a special coating called Galvalume Plus that helps prevent rusting and basic wear and tear on the arches.

Parts & Accessories

There are several ways to customize your SteelMaster Quonset Hut grow house. We offer a variety of parts and accessories that will help create the best environment for the growing process.


Insulation is one of the most important accessories for grow houses, especially for buildings located in areas with high humidity and warm temperatures. This is because insulation keeps growing environments airtight and free of condensation.

Condensation can be a major problem in buildings made with steel. Insulated metal buildings are protected by a vapor barrier that reduces the amount of condensation inside of the structure. Insulating a metal building in a colder climate will protect it from condensation caused by exposure to ice and frost. Those who live in warmer climates want to reduce the heat that caused by solar radiation.

When you’re comparing different kinds of insulation, it’s important to be mindful of the option with the highest R-Value, which is the power to prevent heat transfer, as well as its permeability, which determines how susceptible your building will be to condensation. There are several types of insulation, including loose-fill, blanket insulation or spray foam insulation. Spray foam insulation is one of the most common because it fills every space of the Quonset Hut, creating a great air barrier.


Ventilation is also important in grow houses, as the plants need fresh air intake to thrive. Vents are required to regulate air temperature, humidity and odor. Plus, bad air quality can hinder a plant’s ability to grow, which destroys its value.

SteelMaster’s louver vents are a cost effective solution for your indoor marijuana grow operation. Louver vents eliminate condensation and also maximize air circulation. These vents work especially well in warmer climates because they reduce the heat that builds up inside of the building.  They are made to allow nothing but air to flow through them, which means birds and insects are kept outside.


Sunlight encourages leaf and stem production in marijuana plants. SteelMaster’s skylights allow plenty of natural light into your structure. Light will shine into your building at three different angles, which disperses the light three times better than a conventional flat panel skylight.

Our skylights are designed with a flat bottom, v-shaped corrugation that will match the steel panels of your building. To install the skylight, simply replace an existing roof panel with one of the skylight panels.

SteelMaster’s skylights are resistant to high winds, small flying debris and dangerous hail. If you’re interested in adding skylights, consult your SteelMaster project manager to determine the best locations inside of your building to install the panels.


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