How to Fix a Greenhouse

Written by tracy morris
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Although greenhouses have been around for hundreds of years, it has only been in the last century with advances in plastics that they have been economical for an individual to build. Though greenhouses may be constructed from glass, brick and mortar, the most common types of greenhouses are made of tough, tear-resistant plastic. But tear-resistant doesn't mean tear-free. A tear in the greenhouse skin can be serious enough to let heat escape and allow cold air to creep into your greenhouse, harming tender plants. Fortunately, repairing the plastic skin of a greenhouse is simple.

Skill level:
Moderately Easy

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Things you need

  • Soap
  • Cleaning cloth
  • Bucket
  • Ladder
  • Measuring tape
  • Long-life greenhouse film repair tape
  • Plastic greenhouse sheeting
  • Scissors

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  1. 1

    Wait until the ambient temperature in the air is above 10 degrees C. Otherwise, you to move your plants into your home or to another greenhouse temporarily. Check with a local nursery or commercial greenhouse to see if they will be willing to care for your plants for a fee until you can repair your greenhouse.

  2. 2

    Mix soap and water in a bucket. Using your ladder, clean the inside and outside of the film around the tear in your greenhouse skin thoroughly. Measure the tear with the measuring tape.

  3. 3

    Cut two square patches from your greenhouse plastic sheeting with scissors. The sheeting should be at least 100mm wider in every direction than the tear. By repairing the tear with a patch, you distribute the stress across a greater area. This adds to the life of the repair job.

  4. 4

    Lay one of the patches out flat, and affix the transfer tape across it in strips. Each strip should touch the strip above. Continue until the patch is completely covered on one side with the transfer tape. Press all air bubbles out from in between the patch and the tape. Cut the corners of the patch in a slightly curved shape.

  5. 5

    Climb up on your ladder to be near the tear. Remove the backing paper for the tape to reveal the adhesive. Place the patch over the damaged surface area of the tear, and press out any air bubbles that may form between the greenhouse skin and the patch.

  6. 6

    Repeat steps 4 and 5 for the second patch and affix it over the tear on the inside of the greenhouse.

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