Yes, Termidor SC with a foaming agent will generate more usage per square footage than Termidor FOAM. You will need a foam applicator such as a Chapin Poly Foamer to apply the solution.
Termidor FOAM would not be the product to use in the holes you’re drilled for trenching. It will not bond to the soil for very long, which is what you need when protecting your structure for termites. It can be used in galleries, voids and harborage places. You would use Termidor SC or Taurus SC instead.
The only termite prevention that would be for wall voids would be foaming something like Boracare with ProFoam in a foamer into the area as these will penetrate the wood they contact. This is best for drywood termite prevention. For subterranean termite prevention you would apply something like Termidor SC in a trench around the home. We have treatment guides below with more information.
https://www.domyown.com/subterranean-termite-prevention-guide-a-479.html
https://www.domyown.com/drywood-termite-prevention-guide-a-475.html
Termidor FOAM can be used for a direct application to termite activity in wall voids, but has limited labeling for use outdoors. If you have a subterranean termite infestation you would need to do a trench treatment around your home/structure with a termiticide such as Termidor SC. You can refer to our Termite Treatment Guide for tips on how to do the treatment properly.
Termidor Foam can be applied, in 5 second bursts, into the termites kickout holes on the ceiling. We would also recommend using Boracare in the attic. Boracare needs to be applied to raw wood so it be can be absorbed and kill existing termites and it will protect the wood for the lifetime of it.
Yes, all drilled holes in commonly occupied areas into which Termidor FOAM has been applied should be plugged. Per the product label in Application Instructions on page 3 the manufacturer states that all holes should be filled with appropriate putty or suitable material.
If you are spot treating the voids with Termidor Foam, the product will last for about 6 weeks after applied. See our Termite Treatment article for more information on eradicating termite infestations.
Termidor FOAM is not labeled for carpenter bees and would not be recommended. Please see our Carpenter Bee Kits for the best products to use to treat for this pest.
Termidor FOAM should be applied into the drilled holes. You will not foam the entire wall void, rather you will drill a hole close to the top of the ceiling/stud on either side of the stud. Once the holes are in place on each side, inject the foam into each hole for 5-10 seconds, allowing the foam to expand but slide down the sides of the studs where they would travel. If you are seeing them along the baseboard areas, drill holes every 8-10 inches apart across the area between studs, about an inch or 2 above the baseboard.
When performing a spot treatment behind a wall, it is very important to drill directly into the affected stud and foam into the termite galleries as well as the void on either side of the stud. You will not foam the entire void with Termidor Foam, rather you will drill a hole close to the top of the ceiling/stud on either side of the stud. Once the holes are in place on each side, inject the foam into each hole for 5-10 seconds, allowing the foam to expand but slide down the sides of the studs where they would travel. Foam is preferred because it has the ability to expand and travel deep into the termite galleries, cracks and crevices, and wall void much better, which does provide better coverage than liquids. It should not cause any staining if used as directed.