There is a specific kind of anxiety that only exists when you’re standing ten feet away from a premium 4K impact screen with a driver in your hand, knowing there’s a finished drywall wall just inches behind it.
When I first started building out my sim, I spent weeks obsessing over launch monitor accuracy and GSPro courses. But I’ll be honest: I almost completely ignored enclosure depth. I figured as long as the frame fit in the room, I was good.
I was wrong.
Getting your golf simulator enclosure depth right isn’t just about making the room look “pro.” It’s about two things: stopping a 160-mph ball from denting your siding and making sure that same ball doesn’t come screaming back at your shins.
If you’re planning a build, here is the real-world breakdown of how deep you need to go, the mistakes I’ve seen people make, and how to balance safety with limited floor space.
Deciding which setup is right for you? Check out our Full Guide to the 10 Best Golf Simulator Enclosures.
The Magic Number: Frame Depth vs. Wall Clearance
First, let’s clear up the terminology. There are two “depths” you need to care about:
- Frame Depth: How far the fabric and pipes extend from the screen toward the golfer.
- Wall Clearance (The Air Gap): The “dead space” between your impact screen and the wall behind it.
The 12-to-16-Inch Rule
No matter how tight your screen is, it will billow when a ball hits it. If you mount your screen flush against a wall, you’re going to destroy that wall (and potentially your ball).
In my experience, you need at least 12 inches of space behind the screen. If you’re a high-swing-speed player or using a heavier screen like the Carl’s Place Premium, give it 16 inches. This “air gap” allows the screen to absorb the kinetic energy without hitting the studs.
Why Enclosure Depth Matters for Safety
Most standard “kits” you’ll find from brands like Carl’s Place or Shop Indoor Golf come in depths of 5 feet or less.
The Case for the 5-Foot Depth
A 5-foot deep enclosure is the gold standard for a reason. It creates a “cave” that handles the two biggest safety risks in a home sim:
- The “Skied” Wedge: We’ve all done it. You catch a 60-degree wedge high on the face and it goes straight up. Without a deep enclosure roof, that ball is hitting your ceiling or a garage door opener.
- The Shank: If you’re hosting friends who don’t play much, the “hosel rocket” is inevitable. Side netting or fabric walls that extend 5 feet toward the golfer catch those errant shots before they hit your water heater.
When Can You Get Away with a Shallow Enclosure?
If you’re tight on space—maybe you’re squeezing a setup into a spare bedroom or a narrow Third-Car garage—you might look at “micro” enclosures that are only 12–18 inches deep.
Honestly, this is where most setups fall short. A shallow enclosure looks sleek, but it offers zero protection for “the shanks.” If you go this route, you must supplement it with side curtains or netting that can be pulled out when you’re playing. Otherwise, you’re playing Russian Roulette with your drywall.
Real-World Scenarios: Choosing Your Depth
The “Dedicated Room” Setup (15+ Feet of Depth)
If you have the luxury of a deep room, go with a 5-foot deep enclosure.
- Why: It creates the best immersion for software like FSX Play or TGC 2019 by blocking out ambient light.
- Pro Tip: Position your hitting stirp about 10-12 feet from the screen. With a 5-foot enclosure, you’ll be standing about 5-7 feet away from the front of the enclosure pipes.
The “Multi-Use Garage” (The Tight Squeeze)
This is the most common scenario. You need to park a car, but you want to play 18 holes on your Uneekor or SkyTrak+ at night.
- The Solution: A retractable enclosure (like the HomeCourse or a DIY SportScreen setup) or a shallow frame.
- The Tradeoff: You sacrifice the “theater” feel. You’ll also need to be much more careful about ceiling protection. I usually recommend foam baffling on the ceiling if your enclosure isn’t deep enough to catch those high wedges.
Common Mistake: Forgetting the Launch Monitor Requirements
Your enclosure depth needs to play nice with your tech.
- Radar units (Garmin R10, Trackman): These need 8 feet of ball flight after the hitting mat. If your enclosure is too deep and your room is too short, you might not have enough “clean” air for the radar to read the spin.
- Camera units (Foresight, Uneekor): These don’t care about ball flight distance, so you can push your mat closer to a deep enclosure to save space in the back of the room.
Impact Screen Bounceback: The Hidden Depth Factor
If you find the ball is firing back at you like a tennis ball machine, your screen is likely too tight, or your enclosure is too shallow to allow for “bunt.”
I’ve found that a deeper enclosure actually helps with bounceback. Why? Because you can leave the screen slightly “loose” at the bottom, and the side walls of the enclosure will keep the image looking flat while the screen acts like a giant catcher’s mitt.
My Final Recommendations
If I’m building a sim today, here is my “Goldilocks” depth strategy:
- Back Wall Gap: 14 inches. It’s the sweet spot for safety and space-saving.
- Enclosure Frame: 5 feet deep. Anything less feels “exposed” when you’re swinging a driver.
- The “Safety Loop”: If you can’t fit a 5-foot deep frame, buy a shallow one but install black blackout curtains on a ceiling track that you can pull out 8 feet. It looks professional and saves your walls.
Building a sim is a game of inches. Don’t be the guy who spends $5,000 on a launch monitor only to put a hole in the wall because you tried to save 6 inches of floor space. Measure twice, swing hard, and give your screen the room it needs to breathe.
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