DISCOVER
×

How to Treat Wood for Termites

Updated July 20, 2017

If you're building a deck or a similar outdoor project that is at risk of termite infestation, you can protect the wood using a preventive borate treatment. Borate is a water-soluble chemical used to prevent and control termite infestations. The chemical diffuses into wood, creating a barrier through which termites cannot pass. Termites are poisoned when they eat the treated wood. Once treated, the wood must be coated with a finish to seal in the borate.

Clean the wood of dirt and any surface finish, such as varnish. The wood should be dry, with an internal temperature of at least 4.44 degrees Celsius. If the wood has been stored in a cold environment, place it in a warm location for a few hours before treating.

Cover your work space with newspaper. Ventilate the space by opening a window and running a fan. Wear work gloves, filtration mask and safety goggles to protect your skin, eyes and lungs.

Mix one pound of borate preservative with one gallon of water -- or a multiple of this ratio -- in a bucket using a paint stirrer. One quart of preservative is typically equal to one pound.

Apply the preservative to the wood using a paintbrush. One mixed gallon will cover 150 to 200 square feet of wood. Apply the preservative liberally, thoroughly soaking both ends. Set the wood aside to dry. Wait at least four hours before applying a second coat.

Apply a water-repellent finish to the wood, using a paintbrush, 48 hours after the second coat.

Clean your hands, clothing, paintbrushes and work area using soap and water.

Tip

Wood can also be dipped in a borate solution for improved termite protection. Soak the wood for six to ten minutes, remove and allow to drip dry over newspaper. A second dip can be administered 24 hours later. Apply a water-repellent wood finish 48 hours after the dip.

Warning

Borate is toxic. Keep it away from humans, animals and plants.

Things You'll Need

  • Borate-based wood preservative
  • 5-gallon bucket
  • Long paint stirrer
  • 3-inch paintbrush
  • Newspaper
  • Work gloves
  • Water-repellent wood finish
  • Air filtration mask
  • Safety goggles
bibliography-icon icon for annotation tool Cite this Article

About the Author

Adam Quinn has been writing since 2008. His articles have appeared in the "Journal of Humanistic Psychology." Quinn holds a Master of Social Work from the University of Washington in Seattle, where his focus of study was counseling combat veterans with post-traumatic stress disorder.