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Q&A Home

Tom from Niceville, Fl writes,
08/11/2014:

How much should i use when foaming Boracare into a wall void?

How high should I drill the hole between the studs for foaming wall voids? How much foam should I inject into insulated wall voids? How much foam should I inject into uninsulated wall voids? What is the best way to gauge the amount of foam I inject?

Answer:

Bora-Care is the best product to use for drywood termites in wall voids.  If you are foaming for termites, then you should not be concerned about foaming an entire wall void.  You should only be concerned about getting the foam near the wood and studs.  Typically when a company foams walls, they drill holes at the top of the ceiling on either side of the studs and foam down the stud from the ceiling.  This way you have gravity working in your favor and you are getting the foam against the wood which is all that matters.
You will need to use a stud finder to locate each stud. You should then drill a hole at the top of the wall on either side of each stud and you should drill a second set of holes at the bottom of the wall on either side of each stud. You will apply the foam using the top holes and you will know the foam has successfully coated the wood when it comes out of the bottom holes on either side of the studs. If the foam doesn't make it all the way down due to insulation absorbing it, then drilling multiple holes down the sides of each stud can be done as well. You can also drill holes into the studs in search of the galleries they have eaten away and shoot the foam into these spots for direct treatment.
If you do not have drywood termites and instead have subterranean termites, you should instead look at our article How to Perform a Termite Treatment for proper application and products to be used.

Answer last updated on: 08/11/2014

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