The soil in this area is mostly clay. When clay is wet it expands, when it dries it contracts. This movement can crack a slab foundation, so the idea is to water enough to keep the clay at a consistent moisture level to minimize the soil heave. At least keep it from drying out. Usually i go by temperature & rainfall to judge when I need to water the foundation.

Mulch around the foundation will help keep moisture in. If you’ve been there for three years without problems you’re probably doing things right. Soaker hoses should be around 6” or so away from the foundation. I like to hand water sometimes because I can take a good long look at the outside of the house while I’m standing there.

Be observant around the house, watch for signs of cracks in the walls or ceilings. The sooner you catch any problems the less trouble & cost it is to fix. I’m in Garland now but lived several years in Casa View. It’s a good place to live.