How to Install a Tarpaulin Greenhouse Cover

A greenhouse is an excellent investment for gardeners who want to extend their growing season, protect plants from harsh weather, and create an ideal environment for cultivation. One of the most affordable and flexible options for covering a greenhouse frame is using a tarpaulin cover. Tarpaulins are durable, waterproof, and available in various sizes and materials, making them perfect for DIY greenhouse projects.

In this comprehensive guide, we will walk you through the steps on how to install a tarpaulin greenhouse cover effectively. Whether you’re building a new greenhouse or replacing an old cover, these instructions will help you achieve a tight, weather-resistant enclosure that maximizes light transmission while protecting your plants.

Why Use a Tarpaulin for Greenhouse Covering?

Before diving into the installation process, it’s essential to understand why a tarpaulin cover might be the right choice:

• Cost-Effective: Tarps are generally cheaper than specialized greenhouse plastics or glass panels.
• Easy to Install: They are lightweight and flexible, making installation manageable even without professional help.
• Durability: High-quality polyethylene or vinyl tarps can withstand UV rays, rain, wind, and snow.
• Versatility: Available in many sizes and thicknesses, tarps can be cut and shaped to fit any greenhouse frame.
• Replaceable: If damaged, tarps are easy and inexpensive to swap out.

However, keep in mind that tarpaulins may not provide as clear light transmission as polycarbonate sheets or glass but are sufficient for many gardening needs.

Materials and Tools Needed

Before starting the installation process, gather the following:

Materials

• Tarpaulin: Choose a UV-resistant polyethylene tarp sized to fit your greenhouse frame.
• Rope or bungee cords: For securing the tarp tightly.
• Clips or tarp clamps: To fasten the tarp edges securely.
• PVC pipes or wooden battens (optional): For additional support and structure.
• Zip ties: Useful for fastening ropes or securing corners.
• Weather seal tape (optional): To seal gaps or overlaps.

Tools

• Measuring tape
• Scissors or utility knife
• Ladder (if your greenhouse is tall)
• Hammer and nails (if attaching battens)
• Drill with screws (optional)

Step 1: Measure Your Greenhouse Frame

Accurate measurements are critical for cutting the tarp to size. Measure:

• The length of your greenhouse frame.
• The width of the frame.
• The height from base to peak (if it’s an A-frame).
• Add extra length on all sides (usually 6–12 inches) to allow for secure fastening and overlap.

For example, if your greenhouse is 10 feet long by 6 feet wide with a height of 6 feet at the peak, add extra material so the tarp can wrap around the frame securely.

Step 2: Prepare Your Workspace

Clear any debris around your greenhouse frame so you have safe access. Lay out your tarp flat on the ground near the structure. Inspect it for any damage and ensure it is clean for better adhesion if using weather seal tape.

If your tarp is folded tightly from packaging, unfold it entirely and allow it to relax — exposure to sunlight for several hours can help remove creases.

Step 3: Position the Tarpaulin Over the Frame

Begin by draping the tarp over your greenhouse frame. Have someone assist if possible — one person on each side makes handling easier:

• Center the tarp over the frame so that excess material hangs evenly on all sides.
• Smooth out wrinkles and folds as much as possible by pulling gently.

Make sure that one end of the tarp aligns precisely with one end of the structure to avoid uneven coverage.

Step 4: Secure the Top First

Start fastening at the top ridge of your greenhouse:

• Use clips or clamps along the peak line of your structure.
• If you have battens or PVC pipes running down from the peak, fasten the tarp evenly along these supports.

Securing from the top provides tension that helps stretch out wrinkles on other parts.

Step 5: Fasten Sides and Corners

Once the top center is fixed firmly:

1. Move down to each side of the greenhouse. Pull the tarp taut but do not overstretch it as this could cause tears.
2. Use rope or bungee cords threaded through grommets or clipped onto edges to tie down along side rails.
3. For corners:
4. Fold excess material neatly at each corner like wrapping a present.
5. Secure with zip ties or extra clamps to hold folds tight against wind pressure.

If you’re attaching battens along vertical supports, hammer nails or screw down strips over folded sections of tarp for extra grip.

Step 6: Check for Gaps and Overlaps

Inspect every edge and corner carefully:

• Look for any openings where wind or rain could enter.
• If necessary, use weather seal tape along seams between overlapping sections.
• Double up overlapping tarps in high-risk areas like doorways.

Sealing these weak points will improve insulation and help keep pests out.

Step 7: Reinforce With Additional Supports (Optional)

Depending on climate conditions such as heavy snow or strong winds:

• Add extra PVC pipes or wooden slats inside to support large tarp surfaces.
• Consider placing weights like sandbags at bottom edges to prevent lifting during gusts.

This additional reinforcement prolongs cover life and protects plant health by maintaining stable conditions inside.

Maintenance Tips After Installation

Installing your tarpaulin correctly is only half of successful use—you also need proper care:

• Regularly check clips and ropes for wear; tighten if loose.
• Remove accumulated snow promptly during winter to avoid stress damage.
• Clean dirt and debris off periodically with water and mild soap.
• Replace torn sections immediately with patch kits or new tarp pieces.

Proper upkeep will extend your cover’s lifespan substantially.

Conclusion

Installing a tarpaulin cover on a greenhouse frame is a straightforward project that yields tremendous benefits in terms of plant protection and season extension. With careful measuring, patient positioning, secure fastening, and regular maintenance, you can create an efficient growing environment without breaking your budget.

Choose high-quality materials designed for outdoor use, follow each step carefully, and tailor reinforcements according to local weather demands. Soon enough, you’ll enjoy thriving crops sheltered within your durable tarpaulin greenhouse!

Happy gardening!