Let’s cut to the chase: If you’re a landscape contractor, farm manager, or property owner dealing with sloped pastures, rocky backyard perimeters, or uneven industrial lots, you’ve probably stared at a roll of barrier net and thought, “Can this actually work on my lumpy ground?” As someone who’s spent the last 12 years selling, installing, and troubleshooting barrier net for everything from deer exclusion to construction site debris control, I hear this question at least three times a week. And for a long time, my answer was “it depends”—but today, I’m breaking down the science, the tricks, and the hard truths about getting barrier net to sit right (and work right) on surfaces that aren’t perfectly flat. Barrier Net
First, let’s get clear on what we’re talking about here. Barrier net isn’t just some cheap plastic mesh you pick up at a big box store for Halloween. The commercial-grade stuff my team supplies is designed for long-term, heavy-duty use: high-density polyethylene (HDPE) with UV inhibitors, a tight enough weave to block small animals, debris, or even falling objects, and structural integrity that can withstand wind, rain, and animal pressure. That structural strength is why it’s so popular, but it’s also why uneven surfaces can be tricky—unless you work with the net, not against it.
The biggest mistake I see customers make when tackling uneven ground is trying to stretch the net tight, like they would on a flat field. That’s a one-way ticket to sagging, tears, or gaps where animals or debris slip through. Here’s the science behind that: HDPE barrier net has a relatively low modulus of elasticity, meaning it doesn’t stretch much under tension. When you pull it tight over bumps, the tension points at the posts become concentrated, pulling at the net’s seams or creating small ripples that turn into gaps when weather hits. Last year, a sheep farmer in western Pennsylvania tried to install a 4-foot tall deer exclusion net over his sloped pasture and stretched it so tight that a section pulled free from the posts after the first rainstorm. He lost three lambs to coyotes that slipped through the 6-inch gap that formed where the net pulled away from a rocky outcrop. That’s the kind of story that makes me lean into the “work with the net, not against it” advice hard.
So, what surfaces are we actually talking about? Uneven ground runs the gamut: gentle slopes (5-15 degrees, like a backyard hillside or small pasture), moderate slopes (15-30 degrees, like a rocky embankment or industrial property edge), and severe irregular terrain—think hills with large boulders, deep gullies, or uneven dirt from construction grading. The good news is, barrier net can work on all of these, as long as you adjust your installation strategy to match the surface.
Let’s start with gentle slopes, which are the most common and the easiest to adapt for barrier net. For these, the key is post spacing and net alignment. Instead of driving posts straight into the ground like you would on flat land, you need to adjust post depth to follow the contour of the slope. That means on the uphill side of a slope, your posts will be a little deeper, and on the downhill side, they’ll be a little shallower, so the top of each post forms a straight line that runs parallel to the slope grade, not the horizontal. If you just drive posts straight down, your net will be angled, creating a triangle of slack on the uphill or downhill side, depending on the slope direction. I like to mark my post lines with spray paint before I dig, then use a string level to set the top of each post at the same height. That way, when you attach the net, you’re not fighting the slope—you’re following it.
For moderate slopes, like that embankment next to a parking lot or a pasture with rocky patches, you need to add a little flexibility to the installation. That’s where our commercial-grade barrier net’s built-in feature (we designed it this way after a 2019 project in Colorado) comes in: reinforced border edges that let you gather excess net at contour points without causing tears. Let’s say you have a 20-foot wide section of netting where a boulder sticks up 18 inches in the middle. Instead of cutting the net around the boulder (which creates a weak point), you attach the net to the posts on either side, then gather the extra slack at the top and bottom of the netting using zip ties or small wire loops attached to the posts. This creates a “wave” in the net that follows the contour of the boulder, and because you’re using the reinforced border, there’s no risk of the net tearing under tension. We tested this at a construction site in Ohio in 2021, where we installed debris net over a 25-degree slope with rocks ranging from 1 to 3 feet in diameter. The net stayed in place through two tornado-level wind events, and we didn’t have a single tear. A lot of contractors told us we were overcomplicating it, but when a 2022 storm wiped out a competitor’s net on the same site, they called us back to fix theirs—all because we adjusted for uneven terrain instead of just stretching the net tight.
Now, for the tricky stuff: severe irregular terrain, with gullies, deep ruts, or multiple large obstacles. This is where a lot of people give up on barrier net and switch to fencing, but that’s not necessary. The key here is modular installation, not a single long roll of net. We always tell customers to section off uneven areas into 10-15 foot segments, instead of trying to run one continuous roll over the whole terrain. For each segment, you install posts at each end, then adjust the net to fit that segment’s unique contour. For example, if there’s a 2-foot deep gully between two posts, you can either let the net sag down into the gully (as long as it’s not a hazard for animals or debris) or you can install intermediate “anchor posts” across the gully to support the net, so it doesn’t sag too much. We also have a special accessory we developed for this called contour clips—small, durable plastic clips that let you attach the net to posts at different angles, so you don’t have to cut or sew the net to fit around obstacles. Last year, we worked with a park service in New York that needed to install bird exclusion net around a historic stone wall that had multiple bumps and gaps. Instead of building a permanent fence, they used our contour clips to attach the net directly to the stone wall’s existing metal anchors, adjusted for every uneven section, and the net has been up for 18 months without any issues. The birds can’t get through, and the net blends in so well most visitors don’t even notice it.
Of course, there are limits. Barrier net isn’t the right choice for surfaces with extreme grade changes over short distances—like a 35-degree slope that drops 10 feet in 10 feet of horizontal space. In cases like that, you’ll need a different solution, like chain-link fencing or a taller, sturdier barrier, and we always tell customers that upfront. We’ve had people ask if we can make the net stretchier for these areas, but at the end of the day, if a surface is that uneven, the net will either be too loose (creating gaps) or too tight (pulling apart) no matter what you do. We never sell products that aren’t a good fit for the job, and that’s part of being a reliable supplier, not just someone moving product.
Another thing to consider: ground preparation. A lot of people think “uneven surface” is just sloped ground, but it can also be ground with sharp rocks, roots, or debris. Before installing barrier net on any uneven surface, you need to clear the area where the net will sit of large rocks, roots, or any sharp objects that could puncture the net. Even small holes in HDPE net can turn into big tears over time from wind or animal pressure. We always recommend laying a 2-inch layer of landscape fabric along the base of the net, between the posts, to create a smooth base and prevent weeds from growing up and pushing against the net. That small step makes a huge difference for long-term durability, especially on uneven ground where the net would otherwise sit at different angles and rub against sharp spots.
I know a lot of contractors and property owners are wary of trying new installation techniques, especially when they’ve had bad experiences in the past. That’s why we offer free installation consultations to anyone who buys our barrier net—we’ll come out to your site, walk the terrain with you, and give you specific tips for adjusting post placement, contour clips, and sectioning that are tailored to your exact surface. We don’t do one-size-fits-all, because uneven ground isn’t one-size-fits-all.
Let’s circle back to that original question: Can barrier net be installed on uneven surfaces? The answer is a resounding yes—but only if you adapt the installation to the surface, not the other way around. The biggest mistake people make is following the flat-land installation rules when they’re dealing with slopes, rocks, or uneven ground. By adjusting post depth, sectioning the net, using contour clips, and taking the time to clear and prepare the ground, barrier net works as well on uneven terrain as it does on flat land. It’s durable, cost-effective, and easier to maintain than many other types of barriers, as long as you do the installation right.
If you’re dealing with uneven ground and wondering if barrier net is the right solution for your project, or you need help figuring out the best installation strategy for your specific terrain, reach out to our team to discuss your needs. We’re happy to answer any questions, provide product samples, or help you put together a plan that works for your space.
Safety Barrier Net References:
- American Society of Agricultural and Biological Engineers. (2018). Performance Guidelines for Agricultural Exclusion Netting Systems. ASABE Standard EP528.
- International Code Council. (2020). Residential and Commercial Debris Netting Installation Requirements. Section 1507.
- National Park Service. (2021). Wildlife Exclusion Barriers: Best Practices for Irregular Terrain. NSE Technical Note 21-04.
- HDPE Structural Materials Association. (2019). Durability of UV-Stabilized HDPE Netting in Sloped and Irregular Surfaces. HDSA Report 19-11.
Anhui HYY Import and Export Co., Ltd.
Anhui HYY Import and Export Co., Ltd. is one of the most professional barrier net manufacturers and suppliers in China, specialized in providing high quality products with competitive price. We warmly welcome you to buy barrier net made in China here from our factory.
Address: XiaTang Industry Park, XiaTang Town, HeFei City, Anhui Province, China
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