I’ve got lots of customers asking me about foundation watering. I’ve done some research with peers installing drip systems around houses, conferring with foundation companies, and my experience.
I’m not a foundation expert or engineer. So, any opinion I have is mine and I ‘m happy to share it. If you have questions about your foundation I suggest calling a foundation company and maybe getting an evaluation. Some foundation companies do that for free. I recommend getting all the information you need before investing in any irrigation system, including a perimeter drip system. Keep in mind, as licensed irrigators we do not specialize in foundations although we get lots of questions in that regard. I have a foundation maintenance bulletin you can download from my links page. It’s got some helpful information on there.
There are lots of variables to consider before investing in a perimeter drip system: Existing soil level around house, soil type, plants/trees around the house, slope to/from the house, water rate from source, percolation rate in soil, existing water rate from sprinkler system, and daily weather conditions.
I think the most important conclusion I’ve come to from the questions I’ve asked is, no matter how balanced your moisture is around your house, your foundation can still shift. So, would a perimeter watering system help/save your foundation, maybe. Would it give you peace of mind, yes. If that is worth the investment, then have a watering system installed around your house.