Tim from Richfield writes
Have a barn and some timbers have an existing PP infestation and I wish to treat the remaining timbers as a preventative measure. In total, there is 1,330' of 8x8 timbers, of which 25% are infested. Due to cost, I'll treat the infested timbers at a 2:1 ratio and then go back and spray the entire structure, including the previously treated parts with a 5:1 ratio. I previously sprayed the upper structure using this method and have seen a kill, but it took 2 years for the frass to stop. I did spray the structure to the point where the product would start dripping off the beam.
When using Boracare for an exisiting infestion you woud want to use it at a 1:1 mixing ratio.According to the Log Home and Dimensional Lumber tech Bulletin on this product you would get 75 linear foot of coverage per gallon once it is diluted.
Answer last updated on: 10/10/2016
