When someone is buying or building their first spray rig, what do they usually focus on? The machine, the generator, and the trailer size. But something that’s often overlooked is the rear door, and it shapes how your crew loads drums, works in bad weather, and moves through a jobsite every single day.
💡 Key Takeaway
There are two good options for the rear door of a spray rig: barn-style doors and ramp-style doors. Both work. The right choice depends on your forklift access, jobsite type, and climate.
We’ve built rigs with both configurations for contractors all over the country, so we’ve seen firsthand what works and what doesn’t.
100+ Years of Combined Polyurethane Experience
SprayWorks Equipment has been building custom and turnkey spray rigs since 2012. Our team brings more than a century of combined polyurethane industry experience to every build.
Quick Primer: What Are Barn-Style and Ramp-Style Doors?
Barn-style doors are two doors on the back of the trailer that swing open outward, splitting in the middle like traditional double doors.
Ramp-style doors are a single door on the back of the spray rig, hinged at the bottom, that fold down to become a full ramp. You can walk up or roll drums and equipment directly into the rig.
One quick note: This post focuses on trailer rigs. Box truck rigs are a different animal. For those, check out our post on box truck rig features.
Barn-Style Doors: Benefits and Best Uses
The number one reason contractors pick barn-style doors is they’re forklift-friendly for drum loading. You can load materials more easily, and you won’t break your back doing it. Spray foam drums weigh up to 500 pounds, and people can get injured trying to move them by hand. A forklift is faster, too, so the crew gets the job done quicker.
Barn-style doors also work in tight spaces. A ramp needs room behind the rig to deploy; barn doors just swing to the sides. That matters in urban jobsites – alleys, crowded residential driveways, packed parking lots, and spaces with all the obstructions you’d expect in a city – where a ramp can’t deploy but barn doors work just fine.
They also give you maximum usable cargo space. A ramp has to stow inside the rig when closed, eating into floor space – barn doors don’t – so you fit more materials per load. And because they never touch the ground, the doors stay cleaner. A ramp lands in mud, snow, or gravel behind the rig, while barn doors swing to the sides and stay out of the muck.
One of the most important advantages for spray foam specifically is better climate control. Barn-style doors have a tighter seal, and spray foam material is sensitive to temperature. When temperatures are too hot or too cold, they can harm the material. That tighter seal keeps your chemicals in the right range to spray properly.
A few more advantages: Because they’re double-swing doors, barn-style doors give you a wide entryway for loading bulky items, plus partial access. You can open just one side to grab what you need without exposing everything inside to wind or rain. They’re also easier to lock up securely overnight, giving you peace of mind that your materials are safe.
Important: We only recommend barn-style doors if you have access to a forklift. Without one, loading drums becomes physically risky.
The Trade-Offs
Barn doors do have downsides. For one, they’re hard to load without a forklift – you’d be lifting 500-pound drums up over the trailer step-height, which isn’t realistic for most crews. There’s also a large step up to get in and out, which crews feel after a long day, especially if they’re going in and out of the rig multiple times.
Who Barn-Style Doors Are Best For
- Contractors who have (or plan to get) access to a forklift
- Contractors doing commercial work
- Anyone spraying in cold climates
- Anyone who works on urban, tight jobsites
Ramp-Style Doors: Benefits and Best Uses
The main benefit of ramp-style doors is no forklift is needed. If you’re a smaller operation or a one-truck shop, or if you just don’t want to deal with a forklift, a ramp lets you roll drums up by hand. It’s still heavy work, but there’s less risk of injury, and the job stays manageable.
Ramp doors also eliminate the step-up. Spray foam crews are in and out of the rig constantly, grabbing tools, checking material, refilling the hopper, swapping PPE, and coming back for supplies. That’s dozens of trips a day. With barn-style doors, every trip involves stepping up and down from the trailer floor, which typically sits a foot and a half to two feet off the ground. With a ramp door, there’s no step at all – crews just walk up like a gentle slope. Over a full day or a multiweek project, that difference adds up: less wear and tear on knees, ankles, and backs. It doesn’t sound like a big deal on a spec sheet, but it becomes one of the top reasons contractors stick with ramp-style doors on their next rig.
Ramp-style doors are also easier for permanently installed equipment setups. If your proportioners and hoses are mounted in place and you’re just rolling material in and out, a ramp fits that workflow perfectly. They also make for simpler entry for tools, hose reels, and smaller gear that doesn’t need a forklift.
Before You Choose a Ramp-Style Door, Ask Yourself:
“Will I be able to deploy my ramp no matter where my rig is parked?” If you regularly work in tight urban lots or crowded commercial sites, a ramp may not be practical.
The Trade-Offs
Ramp-style doors have their downsides too.
First, they don’t work as well in cold-weather climates. A ramp can get slick fast in ice or heavy rain, and strong winds make people unsteady going up and down. Rolling a 500-pound drum up an icy ramp is dangerous, and if anyone on your crew isn’t able to move easily or is dealing with a previous injury, ramp-style doors can become hazardous.
Second, you need open space behind the rig to deploy the ramp. In a compact area with a lot of activity, you won’t be able to use it.
Third, you’ll probably need to clean your rig more often. The ramp lands in whatever ground you’re parked on, and any mud gets tracked into the rig, especially if you’re running multiple projects in a day.
Finally, ramp doors eat into interior floor space (since the ramp has to stow inside when closed) and you don’t have as tight of a seal, so in extreme heat or cold, your materials are more exposed to the elements.
Who Ramp-Style Doors Are Best For
- Smaller operators and one-truck shops without forklifts
- Contractors in mild climates (probably not the northern U.S. in winter or the deep South in extreme heat and humidity)
- Crews working residential jobsites with open driveways and plenty of room
- Anyone whose workflow involves rolling drums in and out frequently
Barn-Style vs. Ramp-Style: How to Decide
Neither door is universally better – the right choice comes down to how you actually work. Review the table below to see which style wins for your situation.
| Factor | Your Situation | Winner |
|---|---|---|
| Forklift Access | You have (or plan to get) a forklift | Barn-style |
| You don't have a forklift | Ramp-style | |
| Climate | Cold winters or freezing temperatures | Barn-style |
| Extreme heat where material temp is hard to maintain | Barn-style | |
| Mild year-round | Either works | |
| Jobsite Type | Tight urban, narrow driveways, crowded lots | Barn-style |
| Open rural, residential, or commercial with rear access | Either works | |
| Crew In/Out Frequency | Crews in and out of the rig all day | Ramp-style |
| Less frequent entry | Either works | |
| Overnight Security | Rigs left on jobsites or street-parked overnight | Barn-style |
| Rigs return to a secure yard each night | Either works |
The bottom line: Pick the two or three factors that are most important to your operation. If the winner is consistently one style of door over the other, you’ve got your answer.
Training Included
Every rig SprayWorks Equipment sells comes with specialized training, so crews learn how to load, operate, and maintain their rigs safely from day one, no matter which door style they choose.
Matching Your Door Style to Your SprayWorks Equipment Rig
At SprayWorks Equipment, we build rigs across a range of series – Portable, SMART, Master, Eco, and full custom builds – and door choice often ties into which series makes sense for you.
- Smaller portable and economy rigs often feature ramp-style doors, built for solo operators and smaller crews who don’t run forklifts.
- The Master Series and high-production rigs more often come with barn-style doors, built for commercial crews running forklifts and working bigger jobs.
- Custom rigs let you spec whichever style fits your business.
Find the Right Spray Rig and Door Style for Your Operation
Door choice is one of the most overlooked decisions when it comes to spray rigs, but also one of the most impactful for day-to-day operations and employee comfort. It’s hard to change the door type after the fact, so it’s worth thinking through the choice upfront, particularly if you’re buying multiple rigs.
Not sure which door style fits your operation? Here’s how we can help:
- Contact the SprayWorks Equipment team for a custom rig consultation – we’ll advise you on exactly the best door style for you and your operation.
- Browse our rig series to see examples of both barn-style and ramp-style doors in action.
About SprayWorks Equipment
SprayWorks Equipment is a family-owned business based in Canton, Ohio that’s been building spray rigs since 2008. We offer turnkey and custom spray foam rigs, equipment, and training for contractors across North America.
