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Gutter Systems
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Gutter Systems: From Roof Edge to Downspout

Copper half-round gutter with a star-stamped outlet, offset elbows and a round downspout beside matching hangers, miters and a conductor head
At left, a star-stamped outlet connects the Euro half-round gutter to a round downspout through two elbows. At right are examples of the individual fittings, including hangers, corners and a conductor head.
Planning a gutter run

Choose the gutter first. Match the fittings to it.

Follow the copper Euro system in the photo from the roof edge to the downspout. The hangers cradle the half-round gutter, the star-stamped outlet collects water from the trough, and two elbows bring the round downspout back toward the wall. Each fitting matches the shape of the part it connects to.

If you’re matching an existing gutter, start with a photo taken straight on at the end of the run. Note the opening width, the shape of the bottom and the way the front lip curls. Two gutters sold as the same width can still need different hangers, end caps and screens. A profile drawing lets you compare those details before you order.

For a new system, sketch each run and mark where it stops, turns a corner or drains into a downspout. Those marks tell you where you need end caps, miters and outlets. If you plan to add a gutter guard, check how its front edge meets the gutter lip and where its back edge will sit. Use the six categories below to build your parts list one run at a time.

Find the right part for each point on the run

Gutters

Start with the cross-section. K-style has a molded front; half-round comes in reverse, Euro and double bead. Box and Brownstone profiles have their own front and back details. When replacing a section, compare an end-on view with the drawing before matching by width.

End caps

Close the ends where the gutter stops. Count left and right caps separately for K-style. Some half-round caps fit either end; a box gutter needs a cap made for that particular box profile.

Gutter guards

K&M’s premium screen combines mesh with a perforated support. The fascia-mount and under-roof versions differ at the back edge. The solid cover takes a different approach, guiding water around its nose. Match the front edge to the gutter bead as well as the opening width.

Miters

Use an outside miter where the gutter wraps around a projecting corner, and an inside miter where two runs meet in a recess. Record the angle as well as the direction. A 90-degree inside corner and a 90-degree outside corner take different fittings.

Outlets

Check the connection at both ends. A flat flange suits a compatible flat-bottom gutter; a curved B-style outlet follows a half-round trough. Underneath, the outlet must match the size and shape of the receiving elbow or downspout.

Hangers

A K-style hidden hanger spans the trough and engages the front lip. A half-round bar hanger supports the curved underside. For example, the #15 fascia-mount hanger is an option for a single-bead half-round gutter. Identify the bead and mounting surface before choosing hardware.

What to put on your gutter sketch

  1. Draw each straight run. Write the actual length beside it. Mark exposed ends, inside and outside corners, and the planned outlet locations.
  2. Record the profile and finish. For a replacement, include the opening width, front and back heights, and a photo of the bead. Record the base metal and finish as well as the color.
  3. Check the mounting details. Note where the hanger will attach and whether the back of a screen can mount to the fascia or needs to extend under the roof edge.
  4. Follow the water past the outlet. Record the downspout dimensions and any offsets. Have the installer confirm that the gutter, outlet locations and downspouts can handle the area of roof draining to each run.

For example, a single L-shaped run with two exposed ends, one projecting right-angle corner and one drop calls for two end caps, one 90-degree outside miter and one outlet, in addition to the gutter and hangers. A recessed corner would change the miter even if every run length stayed the same.

Screen, strainer or cleanout: where does debris collect?

A gutter screen covers the trough along the roof edge. An outlet strainer catches debris at the opening to the downspout. A cleanout gives you a place to remove leaves from the pipe before they travel into a lower or underground drain. Select the cleanout to match the pipe shape, dimensions and smooth or corrugated sides. Each part needs to remain accessible for cleaning.

Beyond the gutter

Choose how roof water reaches the downspout

From a gutter outlet

Start with the size and shape of the outlet. Choose an upper elbow if the pipe needs to offset toward the wall, then match the downspout, straps and cleanout to the same pipe profile.

From a scupper or collector

Where water exits through a wall scupper, a conductor head (also called a leader head) can collect the discharge and feed the downspout below. Check the scupper position, wall space and outlet dimensions when choosing a head.

Color and Material Options

0.027″ Stocked Aluminum Colors

Black 0.027

Black

Dark bronze 0.027

Dark bronze

Musket Brown 0.027

Musket Brown

Royal brown 0.027

Royal brown

Almond 0.027

Almond

Linen 0.027

Linen

30° white 0.027

Low Gloss (30°) White

80° white 0.027

High Gloss (80°) White

Special Order Colors

Special Order colors require a minimum purchase of 325 lbs. coil.

London Brown 0.027

London brown

Evergreen 0.027

Evergreen

Russet red 0.027

Russet red

Charcoal grey 0.027

Charcoal grey

Terra bronze 0.027

Terra bronze

Montana suede 0.027

Montana suede

Jefferson tan 0.027

Jefferson tan

Harbor grey 0.027

Harbor grey

Everest 0.027

Everest

Scottish thistle 0.027

Scottish thistle

Pebblestone 0.027

Pebblestone

Victorian grey 0.027

Victorian grey

Tuscan olive 0.027

Tuscan olive

Wicker 0.027

Wicker

Sandstone 0.027

Sandstone

Desert sand 0.027

Desert sand

Classic cream 0.027

Classic cream

Cameo 0.027

Cameo

White 0.027

White

More Information

Aluminum material is supplied by Mastic.
All colors are available in 0.027″ aluminum, in 11.75″ or 15″ coil.
Special Order colors require a purchase of a 325 lb. coil.

Downloads / Color Charts

 PDF – Mastic 0.027″ Aluminum Color Chart

Mastic does not offer a physical color chart or color chips.

Kynar® Aluminum & Galvalume Steel

Black kynar aluminum

Black

Matte black kynar steel

Matte Black
**24 Gauge Steel Only

Dark bronze kynar aluminum and galvalume

Dark Bronze

Medium bronze kynar aluminum and galvalume

Medium Bronze

Almond kynar aluminum and galvalume

Almond

Bone white kynar aluminum and galvalume

Bone White

Copper penny kynar aluminum and galvalume

Copper Penny

Charcoal kynar aluminum and galvalume

Charcoal

Special Order Colors

Special Order colors require a minimum 2000 sqf. purchase for coil. Most colors have a 1 sheet minimum per order. Extra freight charges apply.

Patina green kynar aluminum and galvalume

Patina Green

Teal kynar aluminum and galvalume

Teal

Hemlock green kynar aluminum and galvalume

Hemlock Green

Forest green kynar aluminum and galvalume

Forest Green

Hartford green kynar aluminum and galvalume

Hartford Green

Evergreen kynar aluminum and galvalume

Evergreen

Hunter green kynar aluminum and galvalume

Hunter Green

Arcadia green kynar aluminum and galvalume

Arcadia Green

Military blue steel kynar aluminum and galvalume

Military Blue

Berkshire blue kynar aluminum and galvalume

Berkshire Blue

Graphite kynar aluminum and galvalume

Graphite

Interstate blue kynar aluminum and galvalume

Interstate Blue

Slate blue kynar aluminum and galvalume

Slate Blue

Award blue kynar aluminum and galvalume

Award Blue

Burnished slate kynar aluminum and galvalume

Burnished Slate

Aged bronze kynar aluminum and galvalume

Aged Bronze

Mansard brown kynar aluminum and galvalume

Mansard Brown

Burgundy kynar aluminum and galvalume

Burgundy

Terra cotta kynar aluminum and galvalume

Terra Cotta

Cardinal red kynar aluminum and galvalume

Cardinal Red

Colonial red kynar aluminum and galvalume

Colonial Red

Midnight bronze kynar aluminum and galvalume

Midnight Bronze

Musket gray kynar aluminum and galvalume

Musket Gray

Sierra tan kynar aluminum and galvalume

Sierra Tan

Sandstone kynar aluminum and galvalume

Sandstone

Slate gray kynar aluminum and galvalume

Slate Gray

Cityscape kynar aluminum and galvalume

Cityscape

Granite

Stone white kynar aluminum and galvalume

Stone White

Anodic clear kynar aluminum and galvalume

Anodic Clear

Silversmith kynar aluminum and galvalume

Silversmith

Silver kynar aluminum and galvalume

Silver

Champagne kynar aluminum and galvalume

Champagne

Zinc colored kynar aluminum and galvalume

Zinc

Weathered zinc colored kynar aluminum and galvalume

Weathered Zinc

Aged copper colored kynar aluminum and galvalume

Aged Copper

Weathered steel kynar aluminum and galvalume

Weathered Steel

More Information

Kynar coated material is supplied by Petersen (Pac-Clad).
Colors are mostly available in 0.032″ and 0.040″ aluminum as well as 24 gauge galvalume (steel).
Some colors are available in 0.050″ and 0.063″ aluminum as well as 22 gauge galvalume.
Material available in sheet or coil format.
Pac Clad Sheets measure 48″ x 120″. No minimum purchase, but fees apply.
Standard coil widths are 20″ and 24″. Coils can be cut to any custom with from 48″ and under. Fees apply. 2000 sqf minimum purchase.
To learn more about Kynar® PVDF coated materials, please click here.

Downloads / Color Charts

 PDF – PAC CLAD – Kynar Aluminum and Galvalume Steel Color Chart

Color Chart – To obtain a physical color chart or color chips, please visit this link.

Unpainted Stocked Materials

Bonderized Steel

Bonderized Steel

Copper

Copper

Freedom gray

Freedom Gray

Galvalume

Galvalume Plus

Galvanized Steel

Galvanized Steel

Lead coated copper

Lead Coated Copper

Mill finish aluminum

Mill Finish Aluminum

Stainless steel

Stainless Steel

More Information

Bonderized Steel: Also known as Paint Grip. Offered in 26 gauge G90. 24 gauge available as special order.

Copper is commonly stocked in 3′ x 10′ and 4’x10′ sheets, 11.75″, 15″ 18″, 20″, 24″ (16 oz. or 20 oz.) and 36″ coil (16 oz.). 24 oz. and 32 oz. are available in 3′ x 10′ sheets. Our typical stock is 1/8 to 1/4 hard copper, supplied by Aurubis, Hussey and Revere.
We also stock 1″ x 3/16″ x 12′ bar stock. Other sizes as well as 48 oz. copper are available as special order items.

Freedom Gray is commonly stocked in 3′ x 10′ sheets of 16 oz. and 20 oz. Coils are available as a special order item with a 1000 lb. minimum. Freedom gray is a Tin / Zinc coated copper from Revere Copper.

Galvalume Plus is an Acrylic coated metal, also known as Acrylume. K&M utilizes Acrylume E Plus™ supplied by US Steel.

Galvanized Steel: Offered in 26 gauge G90. 24 gauge available as special order.

Lead Coated Copper is commonly stocked in 3′ x 10′ sheets of 16 oz. and 20 oz. Special order items include 3′ x 8′ sheets and 12″, 15″, 18″, 20″ and 24″ coil stock. A minimum of 1000 lbs. is required for a coil order.

Mill finish Aluminum is commonly stocked in 4′ x 10′ sheets of 0.032″ and 0.040″.

Stainless Steel in normally available in 24 and 26 gauge 4′ x 10′ sheets, 304 alloy 2B finish. Other thickness, and finishes such as #4, #8 and 2D available as special order items.

Downloads / Color Charts

Looking for a custom color not listed? Please EMAIL your request with all information including the metal manufacturer for a quote.

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.

FAQs
Questions Before You Order

Gutter System FAQs

Check which fittings work together before ordering parts for a new run or matching an existing gutter.

What parts do I need for a gutter run?

List the gutter sections and matching hangers first. Add an end cap at each exposed end, a miter at each corner and an outlet at each downspout location. Add screens or covers if you want leaf protection. Count elbows, pipe and straps separately for the downspout.

Can I use fittings from any gutter with the same nominal width?

No. A 6-inch K-style gutter and a 6-inch half-round gutter have different bottoms, front edges and end shapes. Even two half-round gutters can have different beads. Match the actual cross-section and dimensions to the fitting drawing.

How do I tell whether I need an inside or outside miter?

Follow the gutter around the building. If it turns around a projecting corner, choose an outside miter. If it follows a recessed corner, choose an inside miter. Check the angle separately and send a plan-view sketch when the turn is not square.

Do I need a left or right end cap?

K-style caps are handed, so compare the product image or drawing with the end you are closing. Some half-round caps are universal and fit either end of the specified profile. Check the individual listing before ordering a pair.

Which outlet connects my gutter to my downspout?

Match the top of the outlet to the gutter bottom, then match the lower connection to the pipe or elbow. For a flat-flange outlet, measure the usable flat area, not just the gutter opening. A half-round B-style outlet also needs to match the curve of the trough.

Can a hidden hanger be used with a half-round gutter?

Yes, for certain profiles. For example, K&M lists a 6-inch copper hidden hanger specifically for its reverse bead copper gutter. A hidden hanger for K-style or a different bead is not automatically interchangeable. Check the gutter model and the mounting arrangement.

How do I choose between the premium screen and the under-roof screen?

Check where the back edge will sit. The fascia-mount premium screen attaches at the fascia, while the under-roof model extends beneath the roof covering. For either version, check the front lip and opening width against the chosen gutter profile.

Do gutter guards eliminate the need to clean the system?

No. Leaves can accumulate on a guard, especially near a roof valley or under trees. Check the guard surface and outlets periodically and remove debris that interrupts drainage. A downspout cleanout provides another access point; it does not clear the gutter above it.

What should I send K&M to match an existing system?

Send a straight-on photo of the gutter end, a measured cross-section, photos of the mounting surface and corners, and the metal and finish if known. Include run lengths, part quantities, downspout dimensions and the delivery location.