re: Watering the lawn/foundation.

We have expansive clay soils in North Texas which means when the soil gets wet it expands and when it dries out it shrinks. So you want to keep a consistent moisture in the soil around your foundation. Here is a good article.Most people run a soaker hose or a drip irrigation system around the perimeter of the house and run it 15 minutes a day. Anytime between 7pm and 7am is good. You can get a timer that connects to your hose bib but the problem is if it rains, you don't want to water that day. and in the winter, you can turn it off unless its a really dry winter. If you rely on your automatic irrigation system, you are not allowed to water everyday with spray heads. Some cities enforce this more than others so check with your city to see what days you can water. Soaker hoses and drip can be run everyday. This is all assuming you have a slab on grade foundation. I have a pier & Beam and never water my foundation.