7 steps for preconstruction liquid subterranean termite wood treatment


August 14, 2019

Brian Mount, BCE, Technical Service Manager, FMC Corp.

Brian Mount, BCE, Technical Service Manager, FMC Corp.

To ensure an even, consistent and successful preconstruction liquid subterranean termite wood treatment, follow these tips:

  1. Start with a clean tank and spray nozzle to ensure an even and consistent application.
  2. Target the application to coincide with the “dried-in” stage of construction to maximize access to materials that will be treated. Also, be sure that no further modifications, especially cuts in wooden or cellulosic components, will be made.
  3. Treating prior to application of sheathing wraps and/or insulation will optimize the treatment.
  4. Prior to treatment, be sure to clear all sawdust and other construction debris from sill plates or any other wood to be treated.
  5. The use of a dye in the final mix can help the applicator keep track of where he or she did and did not treat. Be sure to consult the customer/builder prior to using a dye during treatment.
  6. Always start the treatment at one specific point of the structure — the right or left front corner, for example. Make your way around the structure in your preferred direction, either clockwise or counter-clockwise. Always follow the same pattern on all the homes you treat. This will lead to more consistent and efficient applications.
  7. Ensure that any cut or exposed ends of construction components within the treatment zone are treated thoroughly, so no untreated area is left exposed to potential insect attack.


Mud shelter tubes or tunnels are the most common signs of subterranean termite infestation, but there are more factors to consider. Some additional areas to look at and inspect include damage to interior wood or walls, damaged wood in basements or crawlspaces, groups of winged termites called alates (swarmers) or discarded wings, and areas of water leakage or raised, split floors. Read about all seven signs of subterranean termite infestations here.

About the Author

Brian Mount

Brian Mount, BCE, is the urban product development lead at FMC Professional Solutions.

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