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how to secure polytunnel cover

If you are unsure as to what size of Polytunnel cover you require, you can find an easy to use Polythene calculator on our First Tunnels website. While burying the cover, keep stamping the earth down to really pin the cover securely. So that is how much flexion there can be at the height of the storm with no major damage. There are two ways to hold the plastic cover in place: pinning it to a wooden base rail which is fitted to the foundation tubes; or burying a skirt of polythene in a trench 30cm deep. The width of the structure and the width of the doors are the main considerations. 200mu cover - Cover material is widely used in NZ on commercial tunnels, one of the best available. However, the most popular time of year for the sale of replacement polytunnel covers and for covering a polytunnel is in the run up to and during spring when the British weather can still be very cold. When building a large polytunnel, more work will be required, including; Digging holes, to safely and efficiently secure the frame; Assembly of the frame (wooden, aluminum, steel), some of them might be more challenging Compact polytunnel greenhouse; Frame in powder-coated steel tubes; Plastic connectors for fast assembly; UV-treated cover in reinforced PE; Easy to assemble; Roll-up front door; Eyelets and guy lines for securing the greenhouse; 1.96 m²; Compact polytunnel greenhouse in durable, lightweight materials, which makes it easy to assemble and move. Check you have the polythene the right way; you will need to read the writing on the polythene from ‘inside’ the polytunnel. Weigh down the edges of the polythene with bricks. We stock PolytexPro which is ideal for cleaning polythene. Polytunnel Greenhouse vs. a Glass Greenhouse Pros include, less expensive, it has the potential to be moveable, it’s quick and easy to build yourself, you could probably get it done in a … Get a little help from your friends -  the bigger the sheet the more hands you will need. When it comes to fitting your polytunnel plastic, a warm day is preferable as this gives the polythene more flexibility, but a warm day is not essential for getting the cover tight, especially if you have the option to re-tension the cover after fitting (eg, with Cover Tensioning Tubes or Base Rails). Construction Guides - Commercial Polytunnels. Digging the extra foil on each side is the standard solution to secure the structure. Depending on the choices made at the point of purchase, and the surface on which the polytunnel has been constructed, the polytunnel will be firmly affixed to the ground by means of ground tubes and ground anchors, fixing plates (for hardstanding) or by ground tubes and trenched polythene. For Garden Centre Canopies, Walkways and Temporary Structures visit NP Structures.. ... Make sure to secure the net covers tightly by tying them to the hoops and crop bars. Take a look at the video below to see the different ways of how to cover a polytunnel. 79. 'The Polytunnel Company' is a trading website of Colm Warren Polyhouses Ltd. We have been successfully manufacturing and building polytunnels, greenhouses and canopied steel structures in Ireland for over 36 years. The downside to this method is digging the trench. #1 – Secure a greenhouse with fixings pegs or stakes You can use pegs to hold down small plastic greenhouses and low polytunnel structures. Please select below one of the options which suits your requirements best. Buy a quality cover. Once you’ve measured the length of your tunnel (C) you need to make an allowance for the ends, especially if your cover is fixed to the end frames rather than fixed to the end hoops. The use of Cover Tensioning Tubes allows you to add tension to the cover after it is trenched in. When a base rail is used the ground tubes will need to be secured in the ground (concreted in or using anchor plates). < Back In the photo of our polytunnel in the snow, we had set it up for early spring planting then had an unfortunate late spring dump of snow in March. You don’t want to start covering then find your hammer is at the other side of the garden! This will ensure good hygiene as well as a plastic cover that will stand the test of time. Here are some top tips from our constructors who cover polytunnels on a daily basis…. I think that the best way to anchor the cover is to dig a trench all round the sides and back-fill with soil once the cover is in place. Ensure you apply anti-hotspot tape. You must have JavaScript enabled in your browser to utilize the functionality of this website. In order to secure the structure, you will have to try your hand at mixing concrete. There are two ways of fitting the cover – the first method is to dig a trench around the base of the frame and bury the polytunnel plastic in the ground. Make Sure the Plastic Cover on Your Polytunnel is Taut & Secure The plastic cover on your polytunnel should be kept as taut as possible but can loosen up over time. A one-piece polythene sheet is pulled over the polytunnel frame, and is secured by being buried in a trench or by being fixed to base rails at ground level, and by being fixed to timber door frames at each end. We would keep our large cover up until mid-December before the heavy snow hit us. As a general rule when fixing to the end frames you should add 2m (6ft 6in) per end, so for a 6.1m (20ft) tunnel you would order a 10m (33ft) long polythene sheet. Gardeners in need of replacement polytunnel covers can calculate the exact size of cover required by entering the measurements of their polytunnel into our online calculator. Cleaning and maintaining your polytunnel to a high standard will make a big difference to how long your polytunnel will last. A Polytunnel: Brief Introduction. Selecting a Fixing Method Trenching is the traditional method used to secure your polythene over your polytunnel. A base rail is the easier way, particularly if there’s not enough space around the polytunnel to dig out a trench. The ends of the cover should be pinned or weighed down whenever cold or frosty weather is forecast. 1-16 of 117 results for "polytunnel" Skip to main search results Eligible for Free Shipping. For Latest News & Special Offers Sign Up To Our. Most people just attach their sheet to the base rail to secure it, or you can just bury it in a trench about half a foot deep. Click here to see our current delivery estimates. If you don’t have a base rail and also don’t have space to bury the sheeting into the ground, you can make your own base rail by using timber and bolting it to your foundation tubes. Base rails are available in timber or aluminium and give an aesthetically pleasing, tighter finish. The Grow It Polytunnel with Heavy Duty Cover will extend your growing season and help you plant and pot flowers, crops and seeds all year round. Please note certain polytunnel covers have limited widths available and may result in excess material. The polythene we stock is from a range of 'Visqueen' films that are manufactured using the latest technology, binding three separate layers of polyethylene together to produce an extremely strong and durable cover. Those are usually lightweight and smaller ones. Polytunnels can potentially be moveable and are generally always have a curved roof. We recommend checking the wind and gust speeds when you are planning your polytunnel cover fitting. The cover supplied to the customer contains an excess of length for both walls, which is buried into the ground when the cover is in place. If you have any rips or tears be sure to fix them as soon as possible as further damage could result in a costly re-cover. A calm day, however, is without a doubt necessary as when you open up the sheet of polythene you are effectively opening a large sail. If it is a little loose, make it taut again by raising the hoops, or tautening it at the base rail. Some polytunnels are relatively easy to assemble and require less work. We will also need to know if the polytunnel plastic is to be buried in a trench in the ground or if it is to be fixed to timber or aluminium base rails at ground level to make sure we supply the correct width of cover. Cover is a one piece rectangular sheet, not welded - No seams to break open and you can use any supplier in the future for a replacement cover if you wish. One year the cover was torn by rubbing against the sharp corner of the greenhouse roof. Take a look to make sure it has not become loose. Please Note: We have fixed widths of polythene available. Since the polytunnel cover will not come into contact with any metal, it is not necessary to use polytunnel hot spot tape which saves yet more money. Every year, be sure to clean your polytunnel thoroughly inside and out. The use of Cover Tensioning Tubes allows you to add tension to the cover after it is trenched in. Alternatively, you may just need side panels for ventilation on a PVC or polythene top cover. We are 100% Irish owned supporting Irish jobs. Be sure to have everything you need close by. Having learnt so much about polytunnels over the years - I went for the strongest and biggest I could afford, both with a really heavy gauge steel frame, cladding strips to hold the polythene along the sides to make re-covering easier if and when necessary, with the toughest heavy polythene covers and they proper sliding and hinged-opening doors. #2 – Bury extra greenhouse cover material in trenches We detected that your JavaScript seem to be disabled. The second way is to fix the polythene to timber or aluminium base rails at ground level – base rails are adjustable to allow for cover tensioning. Take care of your polythene and it can last many years. Everything a commercial grower could ask for can be found here. Before applying anti-hotspot tape, clean any oil or residue off the hoops and ensure they are dry. --------------------------------------------------------------------------------------------------------------------------------------------------------------, It would be ideal to cover your polytunnel on a nice warm day, however the biggest factor that you need to consider is the wind. to dig a trench around the base of the framework and bury the polythene cover in the ground We would not recommend putting a cover on without it. However, if you live in the area with strong winds, go for ground anchor stakes as these are sturdier. To cover the metal frame of your polytunnel we supply hard wearing polythene polytunnel covers manufactured in the UK with the UK climate in mind. Fit on a calm day, to check the wind for the day you are planning to cover why not use this handy wind forecast: Gather the right tools for the job before you start. Start by placing the feet where you want them to go on the ground and dig a hole for each one. We recommend applying Anti Hot Spot Tape to the hoops prior to covering a polytunnel to protect the polythene from degradation due to friction and the built up heat in the polytunnel frame. Secure polythene from the centre outwards, this will help achieve a tight finish. To use this method you will need to dig a trench around the polytunnel, then bury the polythene in the trench and cover with soil; the soil will weight down the cover. Trying to handle the sheet when it’s blowing a gale can be almost impossible.

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