A device used to manage the movement of surface water into and out of an attenuation facility. Drainage which runs through pipework installed to a fall, and not therefore under pressure. Water that is below the surface of ground in the saturation zone. Will not allow water to pass though it.
Examine your crawlspace from both the inside and outside and find all holes and entrances into the space. If your crawlspace is reasonably dark, going inside, turning off the light and looking for sunlight coming in from outside is a great way to do this. Seal the holes with expanding foam or caulk.
Seal the house to keep roaches from entering. Seal cracks in exterior walls to keep roaches out of the house by blocking their entrance. Seal cracks everywhere you can inside your house as well. This takes time, but the payoff is great, because you eliminate most of their favorite hiding and breeding places.1  Fill every crack inside every cabinet in your kitchen.. Use an insecticide spray. Get some insecticide that is labeled for use against cockroaches and contains Cyfluthrin or another insecticide as the active ingredient. Spray wherever cockroaches may be hiding or entering the house, including along walls, in cracks, and in vents.