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Pre Coated Aluminium Roofing Sheet

Last Updated: 2023-09-12

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What is Aluminium Roofing Sheet?

Pre coated aluminium roofing sheet is a metal roofing made of thin aluminum sheet pressed into corrugated or wavy shape through a mold. It is used to protect the roof of a house from rain, snow and other weather.

Coated roofing aluminum sheet installed on the top of the roof. They are usually made of aluminum, but can also be made of other materials like steel, copper or zinc and installed by using nails or screws to attach them to the roof deck.

Corrugated roofing aluminium sheets

Advantages of Aluminium Roofing Sheet

One of the most important reasons to use an aluminum roof is that it is lightweight, strong, durable,recyclable, and it’s also affordable. this means that it is easy for installers to work with the material on a roof, which will save you money on installation costs.These are all reasons why aluminum roofing sheets are so popular.

Types of Aluminium Roofing Sheet

Roofing sheets from Signi are beautiful and high quality. Aluminum roofing sheets can be made to order for any project. They can be cut to size and customized with different shapes and styles.

Available in a wide range of colours and profiles like circular corrugated roofing sheets, modern troughed sheets, trapezoidal roofing sheets and tiled profile roofing sheets.

Circular Corrugated Sheets

Circular Corrugated roofing Sheets are the most popular and widely-used corrugated sheets.

They take care of your basic roofing needs with a variety of colours.

Prepainted corrugated roofing aluminium sheet

Circular Corrugated Sheets are a perfect choice for general roofing and walling applications.

Modern Troughed Sheets

Modern Troughed Sheets are a modern alternative to traditional metal roofing sheets.

They have an angular profile with a sleek design. Equipped with a centre rib for better aesthetic, anti-capillary grooves ensure a leak-proof roof design and an end lip for proper overlapping of sheets.

They are a perfect choice for roofing and claddings of domestic applications.

Troughed (Trapezoidal) sheets

Troughed (Trapezoidal) sheets have an angular profile with a robust design. With an aesthetic look, they are a modern alternative to traditional corrugated metal roofing sheets, they are also available pre-painted in a variety of colours.

Color coated roof aluminum sheet / Troughed (Trapezoidal) sheets

Aluminium Troughed (Trapezoidal) sheets are a perfect choice for roofing and claddings of industrial as well as domestic applications.

Tiled Profile Aluminium Sheets

Tiled Profile Aluminium Sheets are the perfect choice for domestic roofing.

We manufacture traditional and popular tiled shape profiles that are elegant looking and are available in a variety of colours, which add beauty to your roof.

Production process of pre coated aluminium roofing sheets

Pre coated aluminium roofing sheets The production adopts the two-coating and two-drying production process.

Signi aluminum have two paints solid color, wooden grain, brushed, marble grain, chameleon etc thick sheet painting production lines.

Aluminum sheet pre-roll coating process

In order to ensure the coating quality of the colored coating products, it is necessary to remove oil, dust and rust on the substrate surface before coating.

This is the first step to ensure the coating process and the basic work to ensure the quality of the colored coating board products.

The purpose of the treatment is to remove the anti-rust oil, rust spots and dust attached on the surface of the substrate, and to carry out chemical coating treatment on the clean surface of the substrate, in order to increase the adhesion of the substrate and coating, improve the corrosion resistance of the substrate and the durability of the coating.

Pre coated aluminium roofing sheets specifications

Alloy 1100, 3003, 3005, 3104, 3105
Size 300*300, 300*600, 300*1200, 400*400, 500*500, 600*600, 600*1200mm
Thickness 0.2-6mm(0.2-1.0mm for coil, 1.0-6.0mm for sheet)
Surface Treatment Powder coating, roll coating, Film covered
Edge Beveled /Square Edge
Certificates CE, SGS, ISO, etc.
Packaging wooden package
Delivery Time 15-20 days after receiving the deposit and confirm the details
Payment T/T, L/C, Western Union

pre coated aluminium roofing sheets Appearance Quality Inspection Method

According to the provisions of GB/T9761, the test is carried out under natural light conditions not exposed to direct sunlight. Randomly take at least two samples of the same batch (with a total area of not less than 1m2) and join them side by side in the same production direction, and visually inspect them 3m from the center of the assembled board. The consistency of the production direction of the sample should be maintained during the test.

Those who take and place samples will not participate in the visual test.

Monochrome products are evaluated for color difference in accordance with GB/T11186.2 and GB/T11186.3. Metal paint and anodized film are subject to visual observation.

Application of pre coated aluminium roofing sheets

It is widely used in homes, shopping malls, office buildings, hotels, schools, factories, banks, conference halls, gymnasiums, exhibitions, subways, airports and other public places.

The performance of PVDF color coated sheet/coils

Item Test Item Standard National standard Test Result
1 Color Difference ECCA T3 ΔE≤2.0 ΔE≤1.5
2 Gloss Difference ECCA T2 ≤10 ≤5
3 Coating Thickness ECCA T1 Two layers Min 23μm ≥25μm
Three layers Min 30μm ≥34μm
4 Pencil Hardness ASTM D3363 ≥HB HB
5 T-bend ASTM D4145 ≤2T ≤2T
6 Adhesion ASTM D3359 Grade 0 Grade 0
7 Impact ASTM D2794 ≥50kg.cm ≥50kg.cm
8 Boiling water Resistance GB/T17748 2h No change 4h No change
9 Solvent Resistance ASTM D2248 200 times paints remaining 500 times no break
10 Acidity Resistance ASTM D1308 5%HCL 24hrs No change No change
11 Alkali Resistance ASTM D1308 5%NaOH 24hrs No change color △E≤2.0 No change
12 Nitric acid Resistance AAMA620 △E≤5.0 △E≤5.0
13 Oil Resistance ASTM D1308 20#oil 24hrs No change No change
14 Salt Spray Resistance ASTM B117 4000hrs ≤Grade 1 No change
15 Abrasion resistance ASTM D968 ≥5L/μm ≥5L/μm
16 Dirt Resistance GB/T9780 ≤5% <5%
17 Color retaining GB/T16259 4000 hrs△E≤4.0 4000 hrs △E≤3.0
18 Gloss weaken Level 4000 hrs ≤ Grade 2 4000 hrs ≤ Grade 2
19 Chalking 4000 hrs No change 4000 hrs No change

Pre coated aluminium roofing sheets Light weight, beautiful appearance, good anti-corrosion performance, can be processed directly.

Generally divided into gray, blue and brick red color, mainly used in advertising, construction, home appliances, furniture and transportation industry.

Disadvantages of aluminium roofing sheets:

Roofing sheets have many benefits including being lightweight , ow price and recyclable.But there are also some downsides(disadvantages).

1. High cost aluminium roofing sheets

Aluminium is considered to be a much higher quality material compared to zinc or steel. This sets it at a higher price in the metal roof market.

Due to its durability compared to roofing materials such as tiles or asphalt shingles, it is also much more expensive to install. The way it is being setup can be different and hence require well-trained roofers.

2. Aluminium roofing sheets can be noisy

One main issue with aluminium roofing sheets and other types of metal roofs is that they can be noisy when it rains. Each heavy droplet of rain is like the stroke of a drumstick to the batterhead of the drum.

During heavy storms, they form a chaotic symphony of drumming that can be annoying to some people. An extra sheet of sound-proof material could be installed right underneath the aluminium roofing sheet to reduce the noise.

3. Aluminium is easier to dent

The characteristics of aluminium is that it is malleable. Malleable means that it can be hammered into a shape without cracking or breaking. While this may sound like a good feature that the aluminium sheet has, it might not be so when it comes to protecting your house from the elements.

4. Roof repair cost for aluminium roofing sheets can be higher

Aluminium roofing sheets are well, sheets of aluminium overlaid and arranged on each other. It is not like tile or asphalt shingles where one cracked or damaged shingle can be easily replaced with a new one. The same goes for other types of metal roofs. Different material may require different ways to fix the metal roof.

5. Poor fasteners installation could cause roof leak

Fastener is the screw that holds your roof onto the substrate or deck. Unfortunately, human error is one of the most common reasons for faulty fastener installation. These are potentially open spots on the roof that rainwater can seep in.

Pre coated aluminium roofing sheets Mortar Resistance Test Standard

  • After mixing 75g of building quicklime powder conforming to JC/T 480 and fine sand in a ratio of 1:3, filter with a filter with a pore size of 0.84mm, add appropriate water to make a mortar, and apply it on the surface of the paint film.
    Paint it to a size of 50mm×25mm and a thickness of about 13mm.
  • After placing the sample in an environment of 38℃±3℃ and relative humidity of 95%±5% for 24 hours, remove the mortar and wipe off the residual dust with a damp cloth.
    The residual ash that cannot be removed can be removed with a 10% hydrochloric acid solution, and visually inspect the appearance after drying.
  • After the aluminum sheet is coated with fluorocarbon paint, various excellent properties such as high weather resistance, antistatic, anti-fading, high durability, preservative are added to make the aluminum plate more practical and durable.

Imitation copper, 3d wood grain effect, imitation wood grain, wooden, blue sky pattern, hemp pattern are well received by customers.

Which is the best aluminium sheet for roofing?

Henan Signi Industry Co., Ltd. is a professional pre coated aluminium roofing sheets manufacturer, using the color coating production line after pretreatment, roller coating, baking and other processes, on the surface of aluminum alloy with one or more layers of fluorocarbon/polyester paint, can also be coated with different patterns, so that the aluminum plate decoration effect is better.

aluminium sheet for roofing width up to 1850mm, thickness, weight and other specifications can be customized according to the project processing, manufacturers directly supply, low price, after-sales guarantee.

Step tiles aluminium roofing sheet and corrugated aluminium sheet roofing are our popular styles.

Aluminum roofing VS Steel roofing

Aluminum is more malleable than steel, allowing it be configured into more complex profiles. However, especially in simpler profiles, you need fairly heavy gauge aluminum and that will boost its cost.

Steel inherently has more strength than aluminum, it’s usually less expensive and it’s more fire resistant without underlayment. Aluminum does not have a Class A fire-rating but the system can achieve a Class A rating with the proper underlayment and sheathing.

Aluminum alloy has excellent corrosion resistance, aluminum roof has a longer service life than steel roof.

Aluminium roofing sheet price

Aluminium roofing sheet price depends on the surface coating used and the thickness of the aluminium sheet.

PVDF coating has a life expectancy of over 25 years and is more expensive than PE coated aluminium sheet roofing. In addition, the thickness of the same roofing sheet varies and so does the weight of the raw material used, the thicker it is the more expensive it will be.


PVDF Pre painted aluminum coil

More img for Pre coated aluminium roofing sheets

Manufacturer of Pre Coated Aluminium Roofing Sheets

Henan Signi Industry Co., Ltd. focuses on the production of pre coated aluminium roofing sheets, and provide export trade services.

Our aluminium roofing sheets are exported to kerala, lagos, nigeria, hindalco and many other places.

Color coated aluminum sheet with black

Pre coated aluminium roofing sheets has high strength, fingerprint resistant, thermal insulation and corrosion protection, anti-fading, high strength, long life and other advantages.

We provide pre coated aluminium roofing sheets price information for you free, delivery time on time, low price, welcome to consult quotation!

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