Are Duramax Grow Room Walls Better Than Drywall for Indoor Growing?

“What should I line my grow room walls  with?” That’s the one question our consultants are flooded with from both beginners and experienced cultivators. We are Duramax, a leading manufacturer and supplier of PVC panels in the USA. Speak with Phil, Rosalind, Austen, or anyone from the consultation team, and they will offer insight into how indoor cultivation facilities are the most vulnerable spaces and how our panels fit in. From withstanding extreme humidity to ensuring hygiene, our vinyl panels are purpose-built for high-stakes conditions that indoor growing demands.

Grow Room Vinyl Panels Are Gaining Popularity: Agriculture Improvement Act as the Catalyst

Phil is one of our senior consultants who has been with us since the inception. He shares that during market research, it was evident that we needed to fill the gap left by drywall and FRP, especially in humid facilities. We used virgin vinyl in manufacturing, which made the panels non-porous and water-resistant, allowing them to withstand excessive humidity without rotting or becoming damp. Since then, times have changed, and with the 2018 Farm Bill, large-scale cannabis plantations were legalized by the Federal Government. That was it. Grow room vinyl panels addressed the shortfall of drywall by being moisture-resistant and antimold. Today, most cultivators trust vinyl paneling in their indoor farming facilities to keep maintenance and cleaning to a minimum and hassle-free. “I would say I find more time to strategize sales and profit rather than spoiling my mood looking at monthly upkeep expense sheets like before.” Jason, a cannabis cultivator from Denver, shared his testimony with us. 

Apart from cannabis, the microgreen industry is also growing, all thanks to the healthy eating trend across the globe. Our consultation teams share how first-time farmers are coming up with new indoor farming techniques while placing their trust in vinyl paneling for the walls. 

Grow Room Environment Is Brutal on Building Materials! Vinyl Panels Alone Thrive

Are you finding this promotional? But we are not just making random claims. Vinyl panels have proven themselves worthy for humid grow rooms, but how? Before comparing drywall and vinyl panels, you need to understand what your walls are up against inside a grow room:

• Relative humidity in grow rooms lies between 60% and 80%
• Temperature fluctuations due to lights-on to lights-off cycles
• Water vapor from irrigation, transpiration, and evaporation
• Chemical exposure from nutrients, cleaning agents, and fertilizers
• Intense light reflection requirements for maximum PAR efficiency

Drywall or growroom FRP panels were never designed to handle this level of humidity, resulting in dampness and mold growth. Vinyl panels, however, are inherently moisture-resistant and have antimold features, requiring minimal maintenance even in humid grow room interiors. Look at Jason’s experience with how drywall was outright a wrong decision for his grow room.  

Case Study: Jason Trusted Duramax Cannabis Grow Room Walls For Indoor Farming 

Jason runs a 2,400 sq. ft. indoor cannabis facility outside Denver. In 2021, he built out two of his grow rooms using drywall with two coats of semi-gloss white latex paint. By the eighth month, the drywall rooms were showing early signs of mold behind the oscillating fans, the areas with the highest airflow and humidity concentration. He contacted a remediation contractor, who confirmed the presence of mold inside the wall cavity. Halting those rooms for cleanup and re-lining cost Jason significantly in lost production and materials over six weeks. This became an annual heading that returned each year. In January 2025, Jason took the call to strip off the drywall and replace it with Duramax panels. For more than a year and a half, a simple wipe-down or pressure wash has been all he needs to arrange the space. 

Jason recalls: “I thought I was saving money with drywall. I wasn’t. I was just delaying the invoice. But Duramax panels have made the experience effortless with minimal upkeep.”

The Hidden Costs of Drywall Incurred by Jason and Others

Drywall is porous and absorbs moisture over time. This creates a cascade of problems in grow rooms that demand regular upkeep and frequent replacements. Mold and mildew thrive inside damp drywall long before you can see them on the surface, a similar problem Jason reported. By the time you notice discoloration or smell, the contamination has often spread into your wall cavity, threatening your crop and your health. This translates into faster structural degradation as saturated drywall softens, crumbles, and loses its integrity. Frequent repairs are expensive and halt daily operations, creating unforeseen challenges.  Light absorption is another overlooked issue, as the flat-painted drywall reflects poorly. Drywall also has cleaning limitations, which means it can’t be properly sanitized. This results in pathogens embedded in the surface and returning crop after crop.

Vinyl Panels Outperform in the Grow Rooms! Find Out How

High-quality vinyl cannabis grow room walls address the vulnerabilities of drywall. They are: 

• Inherently resistant to moisture: Vinyl panels have a non-porous and seamless surface that doesn’t absorb moisture.
• Mold-resistant by design: With no porous surface for spores to anchor, vinyl panels resist mold and mildew buildup.
• Highly reflective: Bright white vinyl panels can reflect up to 90% of light, spreading PAR more evenly throughout your canopy.
• Easy to sanitize: A simple wipe-down with a damp cloth and mild detergent thoroughly cleans vinyl panels. There is no scrubbing, no soaking, no residue left behind.
• Durable over the long term: Quality vinyl panels don’t warp, swell, or peel with age. They maintain their structural integrity and reflective finish for years.

Want to Build a Smarter Grow Room, Like Jason? Request a Free Consultation

When growing cannabis, microgreens, herbs, or vegetables, your walls matter more than most of you realize. The right surface protects your investment, keeps your environment clean, and maximizes every watt of light you’re paying for. Duramax grow room wall panels are engineered specifically for demanding environments like grow rooms, food processing facilities, and agricultural spaces. They’re water-resistant, mold-resistant, easy to install, and built to last. Order now at factory-direct prices, or request a free consultation!