How to Fill Cavities of Splitting Trees

Trees become damaged from age, weather and disease. They sometimes split and rot from within, causing a cavity. This cavity retains moisture, causing more rapid rot. In some severe cases, standing water inside the cavity is found and insect infestation will result. Using a foam relieves some of these problems associated with tree cavities. The tree can then be sealed and its health monitored.

Things You'll Need

• Polyurethane spray foam
• Handsaw
• Small mesh screen
• Tacks
• Plaster
• Trowel
• Exterior paint (optional)
• Paintbrush (optional)

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Instructions

1. • 1

     Remove the soft rotted wood from the inside of the tree. Remove any standing water, and dry the inside as much as possible.

   • 2

     Spray the polyurethane foam into the tree. Allow the foam to expand and dry. Cut away any excess foam from the tree.

   • 3

     Cut the mesh screen to fit the open areas where only foam is seen. Hold the screen in place and secure with tacks. Using the trowel, apply a layer of plaster over the screen. Allow to dry completely.