If your lawn has dry circles around the sprinkler heads, brown stripes between them, or patches that never seem to green up no matter how long you run the system, the problem usually isn't your grass. It's how the sprinklers were spaced when the system was designed.
The fix starts with a term most homeowners have never heard: head-to-head coverage.
What Head-to-Head Coverage Means
Head-to-head coverage means each sprinkler head is spaced so its spray reaches the next head in the line. Every area of your lawn gets water from more than one head, and the overlap fills in the gaps.
Think of it like painting a wall with a roller. If you leave a gap between passes, you get stripes. If each pass slightly overlaps the last, you get an even coat. Sprinklers work the same way.
Why Overlap Matters
A sprinkler head doesn't spread water evenly across its whole radius. More water lands close to the head, and less lands toward the edge of the spray. When heads are spaced too far apart, the edges of the pattern don't meet, and you get the following:
Dry spots and brown patches between heads
Over-watering near the heads while the gaps stay thirsty
Uneven turf color and thickness across the yard
Higher water bills, because you run the system longer to make up for the dry areas
Head-to-head spacing evens out the pattern. The heavy water near each head is balanced by the lighter water from its neighbors, so the whole lawn gets close to the same amount.
It Also Helps on Windy Days
Wind is a fact of life in Omaha. When a breeze pushes spray off course, a system with wide spacing leaves dry areas. With head-to-head overlap, neighboring heads help cover for each other, so a gust is less likely to leave a bare strip.
Signs Your System May Not Be Head-to-Head
Dry or yellow spots that appear in the same places every summer
Stripes or a checkerboard pattern in your lawn when it's stressed by heat
Green circles right around the heads with weaker turf in between
Having to run your zones much longer than you think should be necessary
Not every dry spot comes from spacing. Clogged nozzles, low water pressure, a tilted head, or a head that's sunk below the turf can all cause similar symptoms. It's worth having a professional look before assuming the design is the issue.
What to Ask When You're Having a System Installed
If you're getting bids for a new system, ask each company one simple question: "Is the system designed with head-to-head coverage?" A good contractor will answer confidently and explain how they lay out the heads. If you get a vague answer, that's worth noting.
Head-to-head coverage is the standard you'll find on golf courses and other turf that has to look great, and the same thinking applies to a home lawn.
Can a System Be Fixed If the Coverage Is Poor?
Sometimes. In many cases we can improve coverage by adjusting heads, swapping nozzles, or adding a head or two where the gaps are. In other cases the spacing is off enough that a zone needs to be redesigned. The best way to know is to have someone watch the system run and look at how the spray patterns meet.
Talk With Alternate Rain
We've been designing and installing sprinkler systems across the Omaha metro area for over 40 years, including Elkhorn, Papillion, Bellevue, Gretna, Bennington, Waterloo, La Vista, Blair, and Valley. You can read more about how we install underground sprinkler systems, or contact us if you'd like someone to take a look at the coverage in your yard.