Metal Corrugated Downspout


Corrugated Downspouts are occasionally used commercially but are typically used in residential applications. Available in Galvalume®, aluminum and copper. DMI offers a full line of accessories including outlets, downspouts, elbows, and downspout straps.


3″x4″ Corrugated Downspout

4″x5″ Corrugated Downspout

DynaClad® 70% Full Strength PVDF Paint Finish and Natural Copper

Choice of over 32 Colors for Galvalume® and Aluminum


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Product Offerings

Offered in a large variety of materials and colors.

  • Galvalume® (22 ga.* & 24 ga.) – See our color chart for standard color offering
  • Aluminum (.040 & .032) – See our color chart for standard color offering
  • Copper (20 oz. & 16 oz.)


Elbow Offerings

  • 3×4 aluminum elbows in .032 only
  • 3×4 & 4×5 steel elbows in 24 gauge only


*Note:  3×4 Downspout not available in 22 ga.


Find the right accessory for your project.



Offset A

Offset B

Elbow A

Elbow B

AIA Continuing Education

DMI is committed to providing you with high-quality expert-level education in accordance with the AIA/CES standards. The courses we offer are designed to meet the needs of architects and typically run one hour in length. All Attendees will earn 1 Learning Unit. Some of the courses offered will meet the Health, Safety, and Welfare (HSW) requirements as well as the Green Building Certification Institute (GBCI) credits.

information on available courses

Our Warranties are Second to None

DMI total system warranties protect all aspects of your metal envelope system, whether that be the watertightness of the roof or siding, the Galvalume ® steel, or the durable PVDF KYNAR® finish. When looking at warranties for your system, it is important to note that not all warranties are created equal. DMI warranties ensure the watertightness of all flashing conditions, trims, curbs, valleys, and penetrations. Building owners are protected with a total system warranty - “from the deck up” when using DMI insulation, fasteners, and underlayment. Our warranties are backed-up by a full-service Engineering Department, generating project specific shop drawings. Quality control is monitored by a minimum of two on-site inspections by our Field Technical Inspectors. DMI Total System Warranties give building owners and design professionals confidence that they are receiving the highest quality and most complete warranty available in the industry.

Browse Our Warranties