The Two-Year Cycle
Winter has arrived, the temperatures have begun to fall, and your hogs and chickens are safe and snug in their pens. But when the wind picks up, you detect a rhythmic snap-snap-snap coming from the south side of the barn. You go out to investigate, and there it is: a ragged tear in your sidewall curtain, flapping wildly in the gale while your animals huddle in the opposite corner.
What happened? You installed that curtain just eighteen months ago! You chose the thickest heavy-duty tarp from the hardware store and secured it well. So why does it look like it went through a wood chipper?
Most farmers will blame the wind, the sun, or maybe even the tarp brand itself. But none of those are the root of the problem.
The Woodpile Mistake
Standard polyethylene tarps are designed to cover inert materials like woodpiles or fiberglass boats. But a livestock barn isn’t a woodpile: it’s a chemical reaction chamber—one that generates massive amounts of heat, moisture, and waste. The root of the problem is that generic plastic tarps are designed to withstand changing weather conditions, not chemical warfare.
The Enemy Within: Ammonia & Sulfur
When you’re installing your sidewalls, it’s easy to focus on weather damage (rain, wind, hail) because it’s easy to feel and see. But in a livestock operation, the most dangerous attacks are chemical, and they come from inside the barn. As manure and urine break down, they release a cocktail of gases. You know the smell well, and you’re familiar with the danger to your animals, but do you know what those gases are doing to those plastic tarps?
Ammonia (NH3)
Ammonia is a highly reactive, caustic gas. When it’s dry, it’s lighter than air, but in the humid environment of a barn, it gathers in heavy clouds along the floor and clings to moisture droplets on the surface of your curtain. It seeks out weaknesses in the polymer chains of standard polyethylene and slowly dissolves them from the inside.
Hydrogen Sulfide (H2S)
Hydrogen Sulfide is that infamous gas responsible for the “rotten egg” smell in manure pits or wet litter. It’s highly corrosive and reacts with the stabilizers found in cheap plastics. Now, those stabilizers were what were supposed to keep the plastic flexible, and once they’re neutralized, your sidewall tarps are just brittle pieces of plastic.
The Invisible Decay
This chemical warfare happens silently. You can’t see the polymer chains breaking. You can’t see the stabilizers leaching out, and for the first year, the curtain will hold up nicely. But by month 18 (probably the depth of winter), the material has changed. It’s not the same flexible, tough sheet you installed. After those chemical attacks, you’re left with a brittle, unstable shell just waiting for a tap—like a gust of wind—to shatter.
The Enemy Without: UV Degradation
While a chemical war rages on the inside of your curtains, a different battle is happening on the outside.
Farmers often underestimate the power of UV radiation, especially in northern climates. We tend to think UV damage only happens on hot July days, but UV rays are present year-round—even on cloudy days, and even in the dead of winter when the sun is relatively low in the sky. In fact, snow acts as a giant reflector, bouncing back almost 80% of UV radiation onto your sidewalls, effectively doubling your exposure.
The Two Front War
This is where cheap tarps meet their doom. Internally, the polymer matrix is being worn down with chemical assaults, while externally, UV photons are bombarding molecular bonds until they snap. Your agricultural curtain, caught in the crossfire, gradually weakens from the inside and the outside until it’s little more than a weakened shell.
The Embrittlement Factor
Embrittlement is the ultimate result of this chemical and solar assault, and it isn’t pretty.
New polyethylene is full of plasticizers—chemical additives that act like lubricants, allowing the molecular chains to slide past each other. These lubricants are what make new tarps soft, foldable, and quiet. But after 18 months of ammonia exposure and UV bombardment, the plasticizers have leached out, and the material has transformed. It no longer rustles; it crinkles. It feels dry, stiff, and papery.
The Failure Point
Embrittled plastic is a ticking time bomb, and unfortunately, the timer usually hits zero in the dead of winter.
When the temperature drops, materials naturally shrink (thermal contraction). A flexible curtain can stretch to accommodate this shrinking. But a chemically embrittled tarp has no give left. As the mercury drops, the tension on the material skyrockets.
It doesn’t take much at this point—just a single heavy gust of wind or the weight of snow sliding off the roof. At this point, the tarp is more like a potato chip than a flexible fabric, so it shatters. And you’re left with a shredded sidewall and a barn fully exposed to the elements at the absolute worst possible time.
Your New Strategy: The Coated Solution
So, if the barn environment is so overwhelmingly hostile, how do you win the war? Simple: you adjust your strategy to counter your opponent’s.
In this case, you need a material engineered specifically for the chemical environment. This is precisely where translucent, coated woven textiles differ from hardware store tarps:
The Scrim
Instead of a solid sheet of weak plastic, these materials start with a high-strength internal HDPE grid (scrim). If the material gets damaged, the scrim stops the tear from spreading.
The Coating
The scrim is encapsulated in layers of low-density polyethylene (LDPE). This specific blend is non-porous and highly resistant to ammonia and sulfur. Imagine it as a hazmat suit for the curtain.
UV Stabilization
High-quality agricultural curtains are treated with a synergistic blend of additives. This blend typically includes UV Absorbers, which absorb solar energy and release it as harmless heat, and Sulfur-Resistant Stabilizers (NOR-HALS), which are engineered to withstand exposure to manure gases and organic fungicides without deactivating.
The Victory: Durability is an Asset
It’s tempting to look at the price tag of a high-quality agricultural curtain and think, “I could buy three blue tarps for that price.” And you’re right. You could. But do you really want to?
Do you want to climb the ladder every two years to replace shredded plastic? Do you want to risk a catastrophic failure in the middle of a January blizzard? Probably not.
Ultimately, your choice is simple: You can buy the cheap tarp three times, or the right curtain once. Save your labor, save your money, and end the cycle.
