Why Downspouts Matter More Than You Think

Gutters collect water. Downspouts move it. If your downspouts are undersized, clogged, or dumping water too close to your foundation, the best gutters in the world cannot protect your home. In Oregon, where we get 37+ inches of rain per year, proper downspout sizing and placement is critical.

Most homes built before 2000 have standard 2x3 inch downspouts. For many Oregon rooflines, that is not enough. We install oversized 3x4 inch downspouts that handle twice the volume and are far less likely to clog.

Underground Drainage Extensions

Surface splash blocks push water a few feet from your foundation. Underground extensions carry it 10 to 20 feet away, discharging into a pop up emitter, dry well, or storm drain connection. This is the difference between a dry basement and one that floods every spring.

We trench, lay corrugated or smooth wall pipe, connect to your downspouts, and backfill. Most residential systems install in a single day.

When to Upgrade Your Downspouts

  • Water pooling near your foundation after rain
  • Basement or crawl space moisture problems
  • Downspouts dumping onto walkways or driveways
  • Erosion channels in your landscaping
  • Gutters overflowing at corners during heavy rain
  • Adding square footage or changing your roofline
Oregon coastal home with proper downspout drainage
  • Oversized 3x4 inch downspouts
  • Underground drainage extensions
  • Pop up emitters
  • Dry well installation
  • Storm drain connections
  • Color matched to gutters
  • Foundation protection
  • Same day install available

Downspout Installation Process

1

Assessment

We evaluate your foundation grading, soil drainage, and existing downspout placement.

2

Sizing

We calculate the right downspout diameter and count based on your roof area and rainfall.

3

Installation

Oversized downspouts and underground extensions are installed with proper slope and connections.

4

Drainage Verification

We test the full system under heavy flow to confirm water routes away from your foundation.

Explore Our Other Services

60+ Inches of Rain Has to Go Somewhere

On the coast, that much water finds every crack. We'll assess your drainage and route it all away from your foundation — free estimate, no obligation.

☎ (541) 270-6492

Common Questions About Downspouts

How many downspouts does my home need?

Generally one downspout per 20-30 linear feet of gutter. Oregon's heavy rainfall may require more. We calculate exact placement during your estimate.

What size downspouts work best for Oregon?

We recommend 3x4" oversized downspouts for most Oregon homes. They handle 50% more water than standard 2x3" downspouts.

Should downspouts drain underground?

For most Oregon homes, yes. Underground extensions route water 6-10 feet from the foundation, preventing basement moisture and soil erosion.

What are pop-up emitters?

Pop-up emitters sit at the end of underground downspout extensions. They open when water flows and close when it stops, keeping debris out.

Downspout & Drainage Across Oregon

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