Per the Termidor SC label: French drains eliminate water at the footing along a foundation perimeter. They are common in hollow block foundation structures to drain water seeping from the exterior perimeter or underneath the foundation. Soil must be dry before applying to sites with French drains. DO NOT rod through the slab any closer than 24 inches to the French drain to prevent Termidor SC finished dilution seepage and/or damage to the drain or the tiles. DO NOT apply Termidor SC within 5 feet of the sump pump pit and pump. To prevent drainage/seepage from the block into the drain, DO NOT drill through hollow block foundations that border the French drain.
Once French drains have been identified and located, apply a 0.06%, 0.09%, or 0.125% Termidor SC finished dilution as follows:
1. Unplug the sump pump. Inspect sump pump pit for water. If no water is present, the treatment can be made provided the sump pump remains unplugged, or
2. if water is in the sump pump pit, unplug the sump pump and remove four cups of water from the sump pump pit. Mark the water level. Wait 10 minutes and check the water level in the sump pump pit again. If the water level has risen, there is too much seepage to perform the treatment at this time. If the water level does not rise, make the treatment provided the sump pump remains unplugged.
During application, check the sump pump pit every few minutes for the presence of Termidor SC finished dilution. If detected, stop treatment immediately and remove the contents of the sump pump pit before plugging in the sump pump again. Either apply the removed sump pump pit contents to a labeled site or dispose of the removed contents as directed by this label in the Pesticide Disposal section.
Note: For structures with French drains located adjacent to the outside of the foundation, refer to the Structures with Adjacent Wells/Cisterns and/or Other Water Bodies section of this label.
Your treatment should not be done within 24 to 48 hours of any rainfall for the best results. Your trench should be 6'' wide, 6'' deep and 10 linear feet along the structure with the Termidor. You can take a look at our site on How to Do a Termite Treatment to give you the proper application instructions for the best results.
Spraying Termidor SC on the surface of soil is not going to offer a protective barrier like the trench and will only work for the general pests that contact the soil surface. Termidor binds to the soil that it is applied to and needs to be used in a trench 6 x 6 inches to offer the best protection. It also does not move through the soil after rain. Termites do not actually contact the surface so it would be best to go back and complete the trench in those areas that have not been done.
Termidor SC is labeled for against structures 1 ft and 1 ft out. It is safe if it had at least 24 hrs after application to dry prior to rain. We do offer products that are great for other areas on the structure for carpenter bees. Please take a few moments to review our treatment article on How to Get Rid of Carpenter Bees and our Carpenter Bee Control Kit.