When building a polytunnel, you must prepare the site beforehand. You must ensure that the ground is level and free of weeds. Also, you must dig away rocks and level the area, leaving enough space between plants. After you’ve prepared the site, you can proceed with building your polytunnel.
Structure made of polyethylene
Polyethylene is a thermoplastic polymer. Its composition is comprised of two types of fibers – a core and a sheath. These fibers can be used in composite structures. These structures can be either single or multi-component. They are often used to build fences, windbreaks, and even buildings.
The two polymers can be combined to form a multilayer structure. Polyethylene can be used as a lower-cost alternative to polyamide, which is known for its high resistance to hydrocarbons and is an excellent barrier. Polyamide can be used for vessels but is expensive compared to polyethylene, so using PE as the outer layer helps reduce the final cost of the product.
It diffuses sunlight
The ability of the polytunnel to diffuse sunlight is of utmost importance when growing crops. It allows the plants to adjust to the external climate and still grow at the optimal rate. Even in the winter, the plants are able to receive optimal light transmission from the polytunnel’s permanent films.
The ratio of UVB:PAR has been determined to be approximately 80-89 percent. There are many benefits of using a polytunnel. One benefit is the extension of the growing season. It also protects against cold air and pests that can harm the plants. Another great benefit of a polytunnel is that it is easy to construct.
It requires planning permission
If you want to set up a polytunnel for your vegetables, you need to know if it requires planning permission. If you do not get planning permission for the structure, you can be put under planning enforcement action by the local planning authority. If this happens, you may have problems with the sale of your existing business.
There are some common planning rules that must be followed to ensure your polytunnel is built legally and safely. First of all, you must provide an accurate map of the plot where you want the polytunnel located. In some cases, this can be achieved by using a mapping service such as Get Mapping for PS33.
It can be built from a kit
Building a polytunnel from a kit can save you hundreds of pounds in construction costs. All you need are basic DIY skills and willing helpers. The best time to start is on a warm day, as the plastic is pliable and will stretch easily over the frame. You should also have a level site. In areas that get a lot of wind, you may want to consider erecting fencing and hedging in the area before constructing the polytunnel.
To build the polytunnel from a kit, you will need to cut the sheet into a V shape. Once you have cut the V shape, you can attach door systems. Some prefab kits come with these door systems already included.
It requires special protection from contamination and over-exploitation
The Environment Agency’s Planning Guidance 2018 has updated the previous voluntary code of practice on the planning and management of polytunnels, clarifying what types of development may be permitted and highlighting planning policy issues. It includes detailed information on the impact on the water environment. It also outlines how a polytunnel might impact on other features, such as the presence of badgers.
A polytunnel can provide a warmer micro-climate for plants, extending the growing season. In addition, polytunnels can protect crops from harsh, erratic weather conditions, including intense heat, bright sunlight, hailstones, and cold waves. Many market gardeners use them to extend their growing season by several weeks or months. This can help to expand the variety of crops grown in a particular region.
It is a greenhouse
A polytunnel is a type of greenhouse that is designed to grow a wide variety of crops. Typically, they are used for growing large quantities of fruit and vegetables. However, some people also use them to grow more exotic crops. If you’re planning to use your greenhouse for this purpose, you should consider some important factors.
Firstly, a greenhouse needs a base. Ideally, the base should be made from compacted soil. It’s also better if it’s built on paving slabs, as they prevent damp build-up and soil diseases. Another feature of polytunnels is that they have large doors on each side. This means that air circulation is much better than it is in conventional greenhouses.