3105 H16 Aluminum Alloy Color Coating Aluminium Stripe For Down Gutter

3105 H16 Prepainted Aluminum Strip for Rain Gutters and Downspouts

3105 H16 prepainted aluminum strip is color-coated aluminum roll stock designed for manufacturing rain gutters, downspouts, drainage profiles and related exterior roof-water-management components. The material can be slit to the required feed width and supplied in coil or strip form for continuous roll-forming production.

The H16 temper provides a useful balance between strength and formability for suitable gutter and downspout profiles. During production, the strip can be fed, roll formed, bent, cut and processed into the required drainage profile according to the customer's machine and finished product design.

Dingang supplies coated aluminum strip with controlled coating properties, customizable slit widths, architectural colors and export packaging. Buyers can specify thickness, width, coating system, color, gloss, coil core and other production requirements according to their gutter-forming equipment.

Request 3105 H16 Gutter Strip Price

3105 H16 Aluminum Gutter Strip Specifications

Why Use 3105-H16 Aluminum for Gutter Roll Forming?

Balanced Strength and Formability

3105-H16 provides a useful combination of material strength and forming capability for suitable rainwater-drainage profiles. The final thickness and profile geometry should be matched to the roll-forming machine, bending radius and finished gutter requirements.

Suitable for Continuous Roll Forming

Slit aluminum strip can be supplied according to the feed width of the customer's gutter or downspout forming line. Continuous coil-fed production supports efficient manufacturing of long gutter sections and repeated drainage profiles.

Corrosion-Resistant Aluminum Substrate

Aluminum does not rust in the same way as ordinary carbon steel. Combined with an appropriate pretreatment and exterior coating system, 3105 aluminum provides a practical material for rain gutters and downspouts exposed to moisture and outdoor weather.

Factory-Applied Decorative Finish

Prepainted aluminum allows gutter manufacturers to form finished colored products directly from coil stock. This reduces the need for secondary painting after roll forming and helps maintain a consistent architectural appearance.

Custom Slitting for Gutter Machines

The strip width can be selected according to the finished profile and forming-machine feed requirement. Proper starting width can reduce trimming, improve coil feeding and minimize unnecessary material waste.

Ask About Custom Gutter Coil Slitting

Front-Side Coating Quality Requirements

The following values are retained from the existing product coating specification. For new orders, the applicable coating system, testing methods and acceptance criteria should be confirmed in the purchase specification before production.

Why Coating Flexibility Matters During Gutter Forming

Rain gutter and downspout production involves repeated bending and roll forming. The coating therefore needs to remain sufficiently flexible during profile formation while maintaining adhesion to the aluminum substrate.

T-bend, impact resistance and forming trials are useful indicators when evaluating coated material for a new profile. Buyers should also confirm the actual bend radii and forming sequence used by their production equipment.

Precision Slitting and Edge Quality

For gutter manufacturing, slit width is not only a dimensional specification. It must match the feed requirement of the roll-forming machine and the developed width of the finished gutter or downspout profile.

The listed slitting capability ranges from 15 mm to 2650 mm. Final width should be specified according to the customer's equipment rather than selected only from a general coil-width range.

Burrs and irregular slit edges should be minimized because excessive burrs can interfere with feeding, mark forming rolls, create handling problems or affect the edge appearance of finished drainage components.

Send Your Gutter Machine Feed Width

Color Options for Rainwater Drainage Systems

Color-coated aluminum allows gutter and downspout manufacturers to coordinate rainwater systems with roofing, fascia, soffits, siding, windows and exterior wall finishes.

Listed color options include white, silver, anthracite grey, brown and wood-look finishes. Additional colors can be produced according to RAL K5/K7 references, Pantone references or approved customer samples.

Where repeat batch consistency is important, buyers should provide the previously approved color reference and specify acceptable gloss and color tolerance before production.

Typical Applications

• Seamless rain gutters

• Downspouts and downpipes

• Residential roof drainage systems

• Commercial building gutters

• Square and rectangular downspout profiles

• Custom rainwater drainage profiles

• Gutter accessories and formed drainage components

• Exterior architectural water-management systems

How to Select 3105 H16 Aluminum Gutter Strip

1. Confirm the Finished Profile

Specify whether the material will be used for a rain gutter, downspout, downpipe or another drainage component. A profile drawing helps determine the required starting width and forming requirements.

2. Confirm Material Thickness

Thickness affects finished rigidity, machine forming force and profile stability. Provide the required nominal thickness and tolerance according to the gutter system and forming equipment.

3. Specify the Slit Width

The slit width should match the developed profile width and gutter-machine feed requirement. Providing the machine model or approved feed width helps reduce specification errors.

4. Confirm the Coating System

Specify the required primer, topcoat, coating thickness, gloss and exterior-performance requirements. If an existing approved coating specification is used, include it with the inquiry.

5. Confirm Color and Gloss

Provide a RAL, Pantone, NCS or customer color reference together with the required gloss level where color coordination with roofing or façade materials is important.

6. Confirm Coil Core and Weight

The current product information lists 405 mm and 505 mm core diameters. Confirm the core size and acceptable coil weight against the uncoiler or feeding system used on the production line.

Ordering and Export Packing

Send Your Gutter Coil Specification

Frequently Asked Questions

What is 3105 H16 prepainted aluminum strip used for?

It is used as coated roll-forming material for rain gutters, downspouts, downpipes and other exterior roof drainage profiles.

Is 3105 H16 suitable for roll forming?

It can be suitable for compatible roll-forming applications when thickness, profile radius, strip width and coating system are matched to the production equipment. A forming trial is recommended for a new profile.

Can the strip width be customized?

Yes. The listed slitting range is 15–2650 mm. Final slit width should be specified according to the developed gutter profile and machine feed requirement.

Why is low burr important for gutter strip?

Excessive edge burr can interfere with coil feeding, contact forming rolls, create handling issues and affect finished profile edges. Controlled slitting is therefore important for continuous gutter production.

What coating thickness is listed for this product?

The existing front-side coating specification lists a nominal total thickness of 24 µm, consisting of approximately 5 µm primer and 19 µm finishing lacquer, subject to the stated tolerances.

What colors can you supply?

Listed options include white, silver, anthracite grey, brown and wood-look finishes. RAL K5/K7, Pantone references and customer-specific color matching can also be discussed.

What coil core diameters are available?

The current product information lists 405 mm and 505 mm paper-core diameters. Buyers should select the core size according to their uncoiler and production equipment.

Can the material be supplied for both gutters and downspouts?

Yes. Suitable slit coil can be supplied for rain gutters, downspouts, downpipes and related drainage profiles, provided that the width, thickness and temper are matched to the finished product and forming equipment.

What should be checked before bulk roll forming?

Check thickness, slit width, edge burr, coating condition, color, gloss, coil winding and machine compatibility. A trial coil or forming trial is advisable when introducing a new material specification.

What is the minimum order quantity?

The existing ordering information lists a minimum quantity of approximately 2–5 metric tons per specification. Final MOQ should be confirmed according to color, width, coating and production requirements.

What information should I provide for a quotation?

Please provide alloy, temper, thickness, slit width, coating requirement, color reference, gloss, core diameter, coil weight, required quantity and destination. Providing the gutter or downspout profile drawing and forming-machine feed width is also recommended.

Get a 3105 H16 Gutter Strip Quote