Introduction

If you ever dreamed of having a greenhouse to extend your growing season and nurture delicate plants throughout the year, you’ve likely come across different materials for greenhouse construction. One popular choice is the polycarbonate greenhouse. In this article, I’ll walk you through the pros and cons of a polycarbonate greenhouse, as well as essential considerations when choosing between polycarbonate or glass. By the end of this read, you’ll be equipped with valuable insights to make an informed decision. Let’s dig in!

What is a Polycarbonate Greenhouse?

Before diving into the advantages and disadvantages, let’s clarify what a polycarbonate greenhouse actually is. Unlike traditional glass greenhouses, polycarbonate greenhouses feature panels made from a durable and lightweight thermoplastic material called polycarbonate. This material has gained popularity due to its unique properties, making it an attractive option for many gardeners. Polycarbonate comes in varying thicknesses and styles. The two most popular are corrugated and triple-walled panels.

Advantages of a Polycarbonate Greenhouse

Excellent Insulation and Heat Retention: Polycarbonate panels have remarkable insulation properties, providing a stable environment for your plants. They retain heat efficiently, ensuring your plants are safe from sudden temperature drops, especially during chilly nights.

Durability and Longevity: Unlike glass, polycarbonate is virtually unbreakable, making it highly resistant to impact and weather-related damages. It can withstand hail, storms, and even baseballs from playful neighbors, giving you peace of mind about its longevity. The typical lifespan of polycarbonate greenhouse panels is 10 to 20 years.

UV Protection and Light Diffusion: Polycarbonate panels are designed to filter harmful UV rays, safeguarding your plants from sunburn and reducing the risk of diseases. Additionally, they diffuse sunlight, distributing it evenly to prevent shadows and promote optimal growth, which reduces or even eliminates the need to rotate plants.

Disadvantages of a Polycarbonate Greenhouse

Limited Aesthetics and Transparency: Some gardeners prefer the classic look of glass greenhouses, which provide unobstructed views of the surroundings. Polycarbonate panels, while functional, may have a slightly less transparent appearance.

Expansion and Contraction: Polycarbonate panels can expand and contract with temperature fluctuations, potentially causing gaps that could compromise insulation. Proper installation is crucial to mitigate this issue.

Maintenance and Scratching: Over time, polycarbonate panels may develop scratches from debris or cleaning. While these scratches typically don’t affect functionality, they can reduce transparency and may require more careful maintenance.

Considerations for Choosing Polycarbonate or Glass

Budget and Cost

Polycarbonate greenhouses are generally more budget-friendly than their glass counterparts. Consider your budget constraints and how much you’re willing to invest in your greenhouse project.

Climate and Environmental Factors

Assess your local climate and weather conditions. If you experience severe winters or frequent hailstorms, the impact resistance of polycarbonate could be a game-changer.

Required Insulation and Light Levels

Determine the specific needs of your plants. Polycarbonate’s insulation properties might be beneficial for certain delicate plants, while others may thrive better with more direct sunlight provided by glass.

DIY vs. Professional Installation of Polybarbonate Greenhouse Panels

Consider your DIY skills and the complexity of the greenhouse model you want. Polycarbonate greenhouses are often easier to install, making them a feasible option for avid DIYers.

How to Install Polycarbonate Greenhouse Panels

Setting up a polycarbonate greenhouse can be an exciting DIY project that brings you one step closer to nurturing your plants all year round. Follow this step-by-step guide to ensure a successful installation of polycarbonate panels:

Step 1: Check local regulations

Check with your local government to see if you need to get a permit. Some towns and cities may require a zoning permit even if they don’t require a building permit for small structures. If you are part of a homeowner’s association, check the covenants and restrictions to be sure you are compliant. It will save a lot of future aggravation.

Step 2: Gather the Necessary Tools and Materials

Before you begin, make sure you have all the required tools and materials at hand. You’ll typically need polycarbonate panels, framing materials (aluminum or galvanized steel), screws, anchors, a drill, a saw, a level, a measuring tape, and safety gear such as gloves and safety glasses.

Step 3: Prepare the Foundation

Ensure you have a level and stable foundation for your greenhouse. Whether you choose to build on a concrete base or use pressure-treated lumber, ensure the surface is smooth and free from any debris or obstacles. If you are building an underground greenhouse, you will still need a stable base for your frame.

Step 4: Assemble the Frame for Your Polycarbonate Greenhouse

Start by assembling the frame of your greenhouse. Follow the manufacturer’s instructions carefully, ensuring all components are securely connected. Use a level to check for evenness and adjust as needed.

Step 5: Install End Walls and Doors

Attach the end walls of your greenhouse, leaving space for doors if applicable. Double-check that they are square and level to maintain the structural integrity of the greenhouse. Install doors according to the manufacturer’s guidelines.

Step 6: Place the Base and Side Panels

Carefully place the base of the polycarbonate panels along the lower part of the frame. These base panels provide support and insulation. Attach them securely using screws with neoprene bonded washers. For corrugated polycarbonate panels, use ½” washers. You will need 1” washers for triple-walled panels. Drill holes for the screws more than ½” from the edge of the panel, and be sure to make the holes in the panels slightly larger than the diameter of the screws.

Step 7: Secure the Roof Panels

Next, it’s time to install the roof panels. Begin from one corner and work your way across the roof, overlapping panels to prevent water leakage. Make sure the panels are evenly spaced and aligned correctly.

Step 8: Cut Panels to Fit

Inevitably, you may need to cut some panels to fit specific areas of your greenhouse, such as the ends or around vents. Measure carefully and use a saw with a fine-tooth blade to achieve clean and precise cuts.

Step 9: Apply Sealant

To enhance insulation and weatherproofing, apply a silicone or polyurethane sealant along the joints and edges of the panels. This will prevent drafts, moisture, and pests from entering the greenhouse.

Step 10: Ventilation and Accessories

Consider installing vents and other accessories, such as fans and shading systems, to maintain optimal airflow and temperature inside the greenhouse. Proper ventilation is crucial for the health of your plants.

Step 111: Final Inspection

Once you’ve completed the installation, perform a thorough inspection of the greenhouse. Check for any loose screws, gaps, or potential issues. Make necessary adjustments and tighten any fasteners as needed.

Step 12: Test Run

Before moving your precious plants into the greenhouse, do a test run. Monitor the internal temperature and humidity to ensure everything is functioning as expected.

Step 13: Fill the Greenhouse with Plants

Now comes the exciting part! Begin filling your polycarbonate greenhouse with your favorite plants and watch them thrive in their new sheltered environment.

With these steps and a bit of enthusiasm, you’ll have your polycarbonate greenhouse up and running in no time. Enjoy your extended growing season and the joy of gardening all year round!

Is a Polycarbonate Greenhouse Right for You?

The ideal Scenario for a Polycarbonate Greenhouse: If you’re a hobbyist gardener looking for a cost-effective, durable, and easy-to-install greenhouse with excellent insulation properties, a polycarbonate greenhouse is an excellent choice.

When to Choose Glass Instead: If aesthetics and transparency are top priorities, and you have a higher budget, opt for a glass greenhouse. This option offers a clear view of your garden and creates a stunning visual appeal.

Combining Polycarbonate and Glass Panels: For the best of both worlds, consider a hybrid approach. Use polycarbonate panels for areas requiring better insulation and glass panels for sections where transparency and aesthetics matter the most.

Conclusion

Now that we’ve explored the pros and cons of polycarbonate greenhouses and the considerations for choosing between polycarbonate and glass, you’re well-equipped to decide which option suits you best. Both materials have their merits, so weigh your preferences and garden’s needs to make a choice that ensures bountiful and joyful gardening experiences.

FAQs

Can a polycarbonate greenhouse withstand harsh weather conditions?

Yes, polycarbonate greenhouses are designed to withstand harsh weather, including hail and storms, thanks to their durable properties.

Is a polycarbonate greenhouse harder to maintain than glass greenhouse?

Polycarbonate greenhouses require regular cleaning to maintain transparency, but they generally require less maintenance compared to glass structures.

Can I install a polycarbonate greenhouse on my own?

Yes, polycarbonate greenhouses are often designed for DIY installation, making them a popular choice among enthusiastic gardeners.