Water bugs are another name for the big roaches that invade our homes. There are several species of large roaches, some up to 1 & 1/2 inches long, that are most often found outside. They breed in any type of mulch or compost that is commonly found in your yard. This includes pine bark, pine straw, leaves, dead trees, woodpiles and driveway walls. If these roaches have invaded your home the following control measures should be taken.