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Roach preventative when building a new house
Submitted by Marilyn
When you are building the house and before the walls are rocked, pour LOTS of boric acid in all the outside walls over the studs. You might get a few cockroaches in the house, but they will be obviously sick and there won't be many of them.
We did this in our own house and roaches are a big problem in our area and when I do see one, they are very slow or they have already assumed the postion and have their feet flailing in the air.