In the commercial they spray a dumpster with it, then take blindfolded people into it.

If it's damage from an old infestation that has already been treated you can just repair the damaged framing.Jill, I am also wondering how I can tell if it's still active or not, just talked to the prior owner who said never had any bug problem in the last 5 years and he sprayed every year even for bed bugs.But he only owned it for last 5 years and not sure if there was termite treatment before.Lei 

Or spray the couplings with soapy water and look for bubbles. 

Get a piece of thick gray vinyl, the stuff used for custom shower pans, and glue it with spray contact adhesive to cover the area under your sink.

Painting your block wall can make a big impact if you're spraying your exterior as well. 

The ones I can think of that I won't be covering  - Kitchen/cooking (tinfoil, parchment, saran wrap, baggies), shampoo/conditioner, Food (coffee, tea, sugar, salt/pepper, spices), dryer sheets/fabric softener, general cleaner (like a Lysol spray), Kleenex.Any differences for you between what you do cover/what you don't? 

Do you ever have problems with a “cat Oder” from spraying?

The water heater outlet line was leaking causing a fine spray of hot water directly on a pier or pad.

Get a P100 mask, spray them with a little water, plastic off the other rooms.

When the fire dept. came out they just sprayed that house to kill the fire so water maybe sitting behind the walls etc.You would then need to check all the electrical wires and potentially have to bring everything up to code depending on how old the house is.