Your gutters are only as good as where your downspouts discharge. If they're dumping water next to your foundation, every rain is slowly damaging your home. We install and extend downspouts properly.
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What It Is
Downspout installation includes adding new downspouts to existing gutter runs, repositioning discharge points, and installing underground extensions that carry roof runoff far from the foundation via buried pipe and pop-up emitters. We also install downspout diverters, rain barrels, and decorative extensions.
Why Des Moines Homes Need It
A 2,000 sq ft roof produces over 1,200 gallons of runoff per inch of rain. Standard downspout splash blocks deposit that water 2–3 feet from your foundation. Underground extensions carry it 15–20+ feet away — a massive difference for foundation health and yard drainage.
Key Benefits
Our Process
We identify where all downspouts currently discharge and calculate whether repositioning or extension is needed.
Each extension is routed underground at proper slope to a discharge point — street, ditch, or open lawn area.
Solid pipe is trenched from downspout adapter to pop-up emitter at proper depth and slope.
We run water through each extension and verify full flow before backfilling and restoring the lawn.
Transparent Pricing
A single downspout addition runs $150–$400. Underground extension with pop-up emitter runs $300–$600. Multiple downspouts connecting to one collector run are more economical per outlet.
Get My Free QuoteTypical Des Moines Range
$150 – $1,200 per downspout
Free on-site estimate. No surprises.
Common Questions
Minimum 6 feet — ideally 15–20 feet on a downward slope. Underground extensions easily achieve this at reasonable cost.
A spring-loaded cap at the end of an underground pipe that opens when water flows and closes when dry — preventing backflow, rodents, and freezing issues.
Properly installed extensions at correct depth and slope drain fully after each use, eliminating standing water that could freeze. Pop-up emitters also help prevent ice blockage.
In most Des Moines municipalities, no permit is needed for residential downspout extensions. We confirm before starting if your situation is unusual.
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Free estimate. Quality installation. Gutters that actually protect your home through Iowa winters.