Building a house

[hookedonbass]

Boric acid is a very effective roach-exterminating agent. If you can place it inside the walls while the house is under construction, you are ahead of the game. It will last as long as it remains dry.

[rockhopper]

I heard you can place boric acid in the kitchen under the sink and the refrigerator. Be careful where you put it (away from kids and pets) boric acid can be toxic if ingested in large quantities.