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Custom Size Downspouts

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Gutter Downspouts – Round, Square, Plain and Corrugated in Aluminum, Copper, Steel, Zinc and Galvalume Plus

Downspouts, also known as leaders or pipes, are parts normally fabricated in 10′ lengths designed to move rain water from a roof through a gutter or leader head to a designated ground area.

K&M Sheet Metal and Gutter Supply offers a wide range of gutter downspout profiles. From the standard common square corrugated pipes to round downspouts, square smooth downspouts  round corrugated leaders.

At K&M Sheet Metal and Gutter Supply, we proudly offer standard profiles and colors at 10′ lengths. Most of our downspouts are offered in 24 gauge colored galvanized steel, 24 gauge galvalume plus, 0.032″ Kynar aluminum colors, 0.027″ regular standard aluminum colors, copper, lead coated copper, zinc, freedom gray and other materials.

We also offer round corrugated downspouts, custom lengths, colors and materials for all downspout profiles, standard or custom, along with gutters, downspouts, elbows, hangers, end caps, outlets and any other gutter accessories needed.

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FAQs – Frequently Asked Questions

Do all gutters need downspouts?

Yes, although in some very rare cases no end caps may be used to let water run off, or rain chains may also be used.

What size downspout do I need?

That question needs to be based on the roof area, the amount of rain the property receives and the pitch of the roof. Normally, 5" gutters call for 2"x3" or 3" downspouts while 6" gutters will have 4" or 3"x4" downspouts. For aesthetics, if the water runoff allows, 6" gutters may receive 3" or 2x3" downspouts. It is standard, although not mandatory to have square downspouts with k-style or box gutters and round downspouts with half-round gutters or brownstone gutters.

Can I get custom sizes and colors?

Yes, we can make longer downspouts, up to 19'6" with special colors and materials along with gutters and all accessories needed. It is not uncommon for us to manufacture 3x3, 4x4, 4x5, 4x6, 5x5, 6x6, 6", 7" and 8" round downspouts.

How do downspout lengths fit together?

The ends of downspouts are normally crimped to accept another length. This is not always perfect, and in such situations, or when a length needs to be cut we offer tools such as crimpers and snips.

What about leaves in my downspouts?

To fix the problem, you may purchase our gutter screen, that will protect the gutters from leaves. Strainers, will protect the pipes from leaves, while our own gutter downspout cleanouts allow for the downspouts to be cleaned when strainers are not present, however, even if present, some debris may still passed through.

Steel vs Galvalume Plus vs Aluminum vs Copper vs Zinc, so many choices!

Aluminum Pipes: The most cost effective all around best option. Normally offered in 0.027" thickness, which is a industry standard, it is also offered in 0.032" with Kynar materials, 0.040" and even thicker for custom applications. Lengths are put together via rivets / screws.
Galvalume Plus Downspouts: A solid approach for looks and durability. Galvalume metals are more rigid than aluminum and can withstand more abuse. Steel / Galvanized Leaders: Same as above. We offer galvanized steel colored gutters and accessories in 24 gauge material.
Copper Downspouts: The most classic choice. Although not the cheapest choice, copper downspouts and gutters look great and allow for a much more robust gutter drainage system. The main advantage of putting up a copper gutter system is that all gutter and downspout joints can and should be soldered. This allows for a long lasting product that can withstand the most harsh environments and it is one of the most commonly used system in areas of heavy rain and snow.
Zinc Downspouts: Zinc downspouts offer all the same advantages as copper and they also patina. However, if you don't like such a dramatic change in look as copper offers, zinc may be the best option for you.
Freedom Gray Downspouts: Zinc/Tin coated copper. Offer the same advantages as copper and zinc.
Lead Coated Copper: Lcc downspouts are as effective as copper, zinc and freedom gray with the advantage of already having lead on them, which means that any soldered joins are much less visible.

No matter what your choice is, K&M Gutter Supply has the best choices for purchasing gutter and accessories online from the comfort of your home with shipping to all US States. We also offer local pickups for customers in the Raleigh Durham Area in North Carolina as well as discount for bulk orders / Contractors.

Submittals & Downloads
Color and Material Options
0.027" Aluminum Downspout Color Options
Black 0.027


Dark bronze 0.027

Dark Bronze

Musket Brown 0.027

Musket Brown

Royal brown 0.027

Royal Brown

Almond 0.027


Linen 0.027


30° white 0.027

Low Gloss White (30°)

80° white 0.027

High Gloss White (80°)

Pac Clad Standard 0.032" Kynar® Aluminum and 24 Gauge Galvanized Steel Downspout Color Options
Black kynar aluminum

Black Aluminum

Matte black kynar steel

Matte Black Steel

Black kynar aluminum and galvanized steel

Charcoal Aluminum Steel

Dark bronze aluminum and galvanized steel

Dark Bronze Aluminum Steel

Medium bronze aluminum and galvanized steel

Medium Bronze Aluminum Steel

Copper penny aluminum and galvanized steel

Copper Penny Aluminum Steel

Almond aluminum and galvanized steel

Almond Aluminum Steel

Bone white aluminum and galvanized steel

Bone White Aluminum Steel

Atas Standard 0.032" Kynar® Aluminum and 24 Gauge Galvalume Steel Downspout Color Options
Kynar Black aluminum and steel

Black Aluminum Steel

Kynar Charcoal Grey aluminum and steel

Charcoal Grey Aluminum Steel

Kynar Classic Bronze aluminum and steel

Classic Bronze Aluminum Steel

Kynar Medium Bronze aluminum and steel

Medium Bronze Aluminum Steel

Kynar Coppertone Bronze aluminum and steel

Coppertone Aluminum Steel

Kynar Matte Almond aluminum and steel

Almond Aluminum Steel

Kynar Bone White aluminum and steel

Bone White Aluminum Steel

Common Material Options for Downspouts


Pre Patina Copper

Pre Patina Copper

Freedom gray

Freedom Gray®

Galvalume Plus

Galvalume Plus

Lead coated copper

Lead Coated Copper



Other colors, materials and thickness may be available upon request. Colors displayed for reference only.
Please click here for a full selection of colors and materials offered.