PolytunnelsRus

  Say you're replacing a polytunnel cover. The timber around the doorway is showing signs of rot and crumbles between your fingers. This may be due to watering and muddy boots keeping the corners wet. Before fitting the new cover, there's another decision to make: replace the damaged rail with timber or switch to aluminium. The cheaper wooden rail won't last as long for commercial polytunnels . An economical timber range brings the starting price down, but what happens after delivery? Aluminium needs different upkeep, and converting means paying for the connections and work needed to fit it. The key question is how much it will cost to replace the existing timber rails with aluminium. What does the base rail do? Along the tunnel, the base rail forms part of the structure holding the cover at ground level. How the polythene attaches depends on the system supplied. The timber batten traps the polythene against the side or base rail. Undo it, and you start to see what ...

Ask a dozen growers what they paid for a polytunnel and you’ll get a dozen different figures. That’s not because nobody knows. It’s because the price depends on options most quotes don’t mention until you’re already halfway through buying. So let’s fix that. How Much Do Polytunnels Really Cost? Take a small domestic tunnel, 3 metres wide and 6 metres long. The frame and cover alone might set you back a few hundred pounds. A large commercial multi-span structure covering an acre sits in a completely different price bracket. Both are “polytunnels”. Both give a completely different answer when you ask how much polytunnels cost. The frame and cover are only part of the bill. A simple garden tunnel might need only modest additional spend on labour, groundwork and fixings, but a large commercial span with concrete anchors and reinforced doors can run into several thousand pounds. That’s why polytunnel installation quotes vary so much from one site to the next. It’s also why there is...

  A grower walks the farm after a night of heavy rain and spots the problem straight away. The salad beds under cover are holding well. The exposed section is wet, slow, and difficult to work. Over by the older tunnel, one loose edge is flapping against the frame, which is never a sound anyone wants to hear before the day has even started. This is usually the point where the buying decision becomes about far more than price . Commercial growing tunnels need to fit the job, the site, and the people using them. Polytunnel covers also deserve careful consideration , because the cover is what the weather, light, and daily wear will test first. At PolytunnelsRus, we see the same pattern repeated over and over: The right tunnel makes day-to-day work easier . The wrong one becomes another job on the to-do list. The best results are achieved when commercial tunnels and polytunnel covers are treated as a single working system. Start with the business use Before comparing frames, ...

  Plain polythene left out in the sun will fail fast. Ordinary plastic sheeting can’t take much sun before it starts to fail. A few months is often enough. It goes brittle, cracks along the fold lines, and rips apart the first time the wind gets under it. Some polytunnel plastic UK suppliers sell lasts five years. Other plastic can fall apart in one summer. There’s a reason for that gap. It comes down to whether UV stabilisers went into the mix before the plastic left the factory. Choosing the right polytunnel plastic makes all the difference. Does polyethene resist UV on its own? No, not without help. Polyethene is the base material in almost all polytunnel plastic UK growers use. Without treatment, it has nothing to stop ultraviolet light attacking it. Sunlight tears the polymer chains apart at a molecular level. Photodegradation is the name for that process. Give it enough exposure and the sheet goes cloudy, then chalky, then it starts flaking off in your hand. That’s wh...

  A domestic tunnel and a commercial tunnel can look very similar. Step inside and the difference is obvious. A domestic tunnel is usually for garden crops, seedlings, a smallholding, or an allotment. Commercial polytunnels are working structures that take a lot of punishment. They are built for repeated access, heavier cropping, larger spans, stronger weather loads, and need to be durable to last. That does not make a commercial tunnel. It just means they are meant for different jobs. Frame strength and scale Domestic tunnels are normally smaller and lighter. You can often put one up with basic tools, grow tomatoes, salads, strawberries, and overwintering plants, then adjust things later without much drama. Commercial polytunnels have to cope with more. Longer runs, wider bays, crop support wires, irrigation, staging, stock use, and barrow or machinery access all put extra strain on the frame. Steel thickness matters. So does hoop spacing, bracing, anchoring, and door desi...

  A simple garden polytunnel sheet can look close enough to a professional film when it is still on the roll. It is clear, flexible and keeps rain out. For a small domestic frame, that may be fine. For commercial polytunnels, the cover has a harder working life. Wind load, crop value, light levels, condensation and frame length all matter. So yes, you can physically put basic polythene on a commercial tunnel. But for commercial polytunnels that earn money, it may be a false economy. Why the cover matters at a commercial scale Once the bay gets longer and wider, the sheet starts taking a fair bit of punishment. Commercial polytunnels tend to sit higher, run further and catch more weather than a back garden frame. Thin polythene film soon shows its weak spots around doors, crop wires, hoops and fixings, because that is where movement keeps nagging at it. The growing environment matters too. Good polytunnel covers are not only a waterproof skin. They affect light transmission,...