Maya Ellison
Plastic sheeting is a budget-friendly and efficient way to build a greenhouse. It provides a controlled environment that allows you to extend the growing season, protect plants from harsh weather conditions, and create an ideal space for cultivating a wide range of crops. When selecting a plastic covering, it is important to choose a thickness of at least 6 mil, which is meant to last 4 years or longer. To attach the plastic sheeting, you can use zip ties, clips, or butyl tape, which is a strong adhesive that is resistant to high temperatures and most weather conditions. It is also important to select a location that receives ample sunlight throughout the day, such as a south-facing location. By following these steps, you can create your own greenhouse with plastic sheeting, providing a haven for your plants to thrive year-round.
| Characteristics | Values |
|---|---|
| Plastic sheeting thickness | At least 6 mil |
| Plastic sheeting material | Polyethylene plastic |
| Plastic sheeting properties | UV-resistant, durable, affordable |
| Ventilation | Required for healthy growing environment |
| Sealing | Use duct tape or adhesive to seal edges and close gaps |
| Installation | Drape over frame, secure with zip ties or clips at regular intervals |
| Wind | Avoid high wind speeds during installation |
| Maintenance | Regular monitoring, repair tears or damage promptly |
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What You'll Learn
Choose a high-quality, UV-resistant plastic sheeting
When selecting a high-quality, UV-resistant plastic sheeting for your greenhouse, there are a few key factors to consider. Firstly, the thickness of the plastic sheeting is important. The standard thickness recommended by the NCRS is 6 mil, which strikes a balance between durability and flexibility. While thinner plastic may be cheaper, it will likely need to be replaced sooner and may not provide adequate protection for your plants. On the other hand, thicker plastic, such as 8 mil or 10 mil, may be more suitable for larger commercial operations or demanding environments where extra durability is required.
Another crucial consideration is the UV protection offered by the plastic sheeting. Choose a sheeting that is specifically designed to be UV resistant or UV stabilised. This will ensure that the plastic can withstand intense sunlight without premature degradation. Look for products that have a warranty or guarantee against UV degradation, as this indicates a higher quality product. For example, Farm Plastic Supply offers 4-year UV-resistant plastic sheeting, while Bootstrap Farmer offers a 4-year warranty on their UV-stabilised plastic sheeting.
The light transmission properties of the plastic sheeting are also important. High light transmission, such as 89% or 90%, is beneficial as it ensures your plants receive the sunlight they need for optimal growth. Additionally, consider plastic sheeting with anti-condensate properties, as this will reduce the formation of water droplets on the inner surface, improving light transmission and reducing the risk of plant diseases.
When selecting a UV-resistant plastic sheeting, it is also important to ensure that it is compatible with the frame of your greenhouse. For example, if you have a PVC pipe frame, avoid using UV-protected greenhouse films as they should not come into direct contact with PVC. Instead, consider using a non-PVC tape or white latex paint to create a barrier between the plastic and the PVC.
Finally, take into account the ease of installation and maintenance of the plastic sheeting. Choose a product that is easy to drape over the frame and secure with zip ties or clips. Regularly inspect the sheeting for any tears or damage and make repairs promptly to maintain the integrity of your greenhouse. Having a roll of repair tape on hand is always a good idea to fix any small tears or punctures that may occur over time.
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Prepare the surface and use butyl tape to secure the sheeting
When preparing the surface for butyl tape application, it is important to ensure that the surface is clean, dry, and free from any dirt, grease, or water. These contaminants can affect the tape's adhesive properties and weaken the strength of the seal. Use a sharp knife to cut the tape to size, ensuring straight and precise cuts to avoid uneven edges.
Butyl tape is a pressure-sensitive adhesive that is highly flexible and resistant to water, chemicals, abrasion, and weather conditions. It is available in single-sided and double-sided varieties, with the former used for bonding two surfaces and the latter for sealing or gasket creation. The tape is also available in various widths, thicknesses, colours, and grades, allowing for customisation based on specific requirements.
To apply the butyl tape, start by removing the release liner and firmly pressing the tape onto the prepared surface. Use a roller to ensure a good seal and prevent bubbles from forming. Apply the tape along the entire length of the board on both sides, leaving the release liner in place for now. Then, attach the plastic sheeting to the hoops of the greenhouse structure, being mindful of wind conditions and potential obstructions.
Once the plastic sheeting is in place, remove the release liner from the bottom row of tape a few feet at a time and secure the poly to the tape. This process will help create a strong and durable seal, maintaining the desired environment within the greenhouse while effectively securing the plastic sheeting.
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Seal around cracks and openings to retain heat
Sealing cracks and openings is an essential step in improving the insulation of your greenhouse. Proper insulation helps maintain a stable temperature and protects plants from sudden temperature fluctuations.
To seal any cracks, gaps, or openings, you can use caulk, duct tape, or adhesive. For example, you can use duct tape or adhesive to seal the edges of the plastic sheeting to the frame. You can also use double-sided glazing tape or butyl tape to seal panels securely. Additionally, you can create an "airtight" interior by lining the interior studs of your greenhouse with UV-rated plastic, which will help retain heat.
It is important to note that sealing a greenhouse without appropriate ventilation can cause the temperature to rise to harmful levels for plants. Therefore, proper ventilation should be maintained to allow fresh air to circulate, prevent overheating, and control humidity levels.
By sealing cracks and openings, you can improve heat retention and create a more stable environment for your plants.
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Cut holes for openings and secure with staples
When creating openings for ventilation, it is important to consider the location of your greenhouse and the direction of the wind. You can create ventilation openings by leaving gaps along the bottom edge of the plastic sheeting on both sides of the greenhouse. Alternatively, cut holes for openings in the plastic sheeting to install vents or windows that can be opened and closed as needed. These openings will allow fresh air to circulate, prevent overheating, and control humidity levels.
To cut the plastic sheeting, you can use bolt cutters or a hacksaw. Before cutting, ensure that the plastic is securely draped over the frame, with at least 2 extra feet of material on the ground all around the structure. Mark the spots where you want to cut the holes, and use a sharp blade or scissors to carefully cut through the plastic.
Once the holes are cut, secure the plastic sheeting around the openings with staples. Start by stapling the sheeting to the frame at regular intervals, being careful not to pull the plastic too tightly. You can also use zip ties or clips for added security. If using staples alone, consider placing a strip of felt or vinyl strapping under the plastic and stapling through it to the boards, as this will provide a stronger hold, especially in high winds.
Additionally, to protect the plastic from damage and ensure a tighter hold, you can place straw bales around the perimeter, weighing down the plastic on the sidewalls. This will also help insulate your greenhouse, reducing temperature fluctuations and providing a more stable environment for your plants.
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Select a location with ample sunlight
Selecting a location with ample sunlight is crucial for the success of your greenhouse. The location you choose should receive plenty of sunlight throughout the day. South-facing locations are ideal as they tend to receive the most sunlight. Ensure there are no large obstructions like trees or buildings that could cast shade on your greenhouse.
When selecting a location, it's also essential to consider the surrounding environment. Look for an area with good drainage and take into account prevailing winds and nearby structures that might offer some protection. You don't want your greenhouse to be in a low-lying area where water collects after rain or in an area with heavy winds that could damage the structure.
Accessibility to water and electricity sources is another important factor. Having a nearby water source will make irrigation more convenient, while electricity access can be beneficial for lighting or powering any equipment you may need.
Additionally, consider the size of the greenhouse you plan to build and ensure the location can accommodate it. It's always a good idea to clear the area of any debris and level the ground as much as possible before setting up your greenhouse.
By choosing a location with ample sunlight and considering these additional factors, you'll be well on your way to creating a successful and functional greenhouse space.
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Frequently asked questions
You should use UV-resistant plastic sheeting made of 6 mil or thicker polyethylene plastic. This type of plastic sheeting is affordable, durable, and able to provide cover for many years.
First, unroll the plastic sheeting over the frame of your greenhouse, ensuring it covers the entire structure. Then, use zip ties or clips to secure the sheeting to the frame at regular intervals. Be cautious not to pull the plastic too tightly, as it needs some flexibility to withstand wind and weather conditions.
You will need the following tools:
- Ladders
- Bolt cutters or a hacksaw
- Push brooms
- Tennis balls
- Zip ties or clips
Regular monitoring and maintenance are essential to ensure the success of your greenhouse. Keep an eye on temperature and humidity levels, and adjust ventilation as needed. Regularly inspect the plastic sheeting for any tears or damage and make repairs promptly to avoid compromising the greenhouse's integrity.
