Quote:
Originally Posted by Blueblaze
Here's the real reason they're required. 20 years from now your sprinkler heads are going to be 3" lower than they are now. I have no idea why, I just know it's true, because I have a 20-year-old house and I've had to add a new layer of donuts to all the sprinkler heads this year. And there are a couple places I don't care about where I am sure there must have been a sprinkler head once but I'm too lazy to dig up the yard to find it.
What the heck causes that? I'm from Houston, where everybody also has a St Augustine lawn, but I've never seen this before. If the ground is sinking, why is my house just fine? Weird!
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Been pondering the same. But, my assumption was that the ground level was somehow rising rather than sinking. Does dirt grow? Can thatch become dirt over such short periods? Tectonics would drag the sprinkler system along with it, no? Can grass roots raise the dirt level? (They'd wait a million years. . .).