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Author: Site Editor Publish Time: 2026-04-23 Origin: Site
If you are planning a new roof or replacing an old one, you have likely asked yourself: “Is UPVC roofing sheet better than aluminium roofing sheet?” Both materials are popular choices for residential, industrial, and agricultural buildings. But they differ significantly in performance, maintenance, and long‑term value.
As a manufacturer of LESSO UPVC roofing sheets, we have extensive experience with both materials. In this guide, we provide an honest, feature‑by‑feature comparison to help you decide which roofing solution best suits your needs. We will not name other brands or quote prices—only focus on the inherent characteristics of UPVC versus aluminium.
| Feature | UPVC Roofing Sheet | Aluminium Roofing Sheet |
|---|---|---|
| Material | Unplasticized polyvinyl chloride (rigid, no plasticizers) | Lightweight metal alloy |
| Corrosion resistance | Excellent – completely rust‑proof | Good – naturally forms protective oxide layer, but can corrode in certain environments |
| Thermal insulation | Excellent – low thermal conductivity | Poor – conducts heat readily |
| Noise during rain | Low – dampens sound | High – loud, especially in heavy rain |
| Weight | Very light (4–6 kg/m²) | Light (3–8 kg/m² depending on thickness) |
| Impact resistance | Good – with impact modifiers | Moderate – dents easily |
| UV resistance | Excellent (with UV stabilizers) | Good – paint/coating may fade |
| Maintenance | Very low – never needs painting | Moderate – may need repainting or coating renewal |
| Fire rating | B1 self‑extinguishing (available) | Non‑combustible |
| Lifespan | 25–40+ years | 30–50 years (with proper coating) |
| Recyclability | 100% recyclable | 100% recyclable |
Now let us examine each factor in detail.
Aluminium is naturally corrosion‑resistant because it forms a thin oxide layer when exposed to air. However, this protection can be compromised in certain environments:
Coastal areas with salt spray – Salt can penetrate the oxide layer, leading to pitting corrosion.
Industrial zones with chemical fumes – Acidic or alkaline emissions can attack the metal.
High‑humidity regions – Prolonged moisture can cause galvanic corrosion if dissimilar metals are used (e.g., aluminium in contact with steel fasteners).
UPVC, on the other hand, is completely immune to rust and corrosion. It does not react with salt, moisture, acids, or alkalis. For coastal buildings, chemical plants, poultry farms (ammonia exposure), or any environment where corrosion is a concern, UPVC is the superior choice. LESSO UPVC sheets maintain their structural integrity and appearance for decades without any protective coating.
Winner: UPVC
A roof’s ability to insulate against heat directly affects indoor comfort and energy bills.
Aluminium is an excellent conductor of heat. On a sunny day, an aluminium roof can become extremely hot, transferring that heat directly into the building below. This forces air conditioners and fans to work harder, increasing electricity consumption. In cold climates, aluminium also conducts heat out of the building, making heating less efficient.
UPVC has very low thermal conductivity. LESSO UPVC roofing sheets are engineered with a multi‑layer structure that acts as a natural thermal barrier. Buildings with UPVC roofs stay cooler in summer and warmer in winter compared to metal roofs. Independent tests show that UPVC roofs can reduce indoor temperatures by 4–5°C compared to aluminium roofs under the same conditions.
Winner: UPVC
Rain on a metal roof can be surprisingly loud – sometimes described as a “drumming” or “popping” sound that disturbs sleep, conversation, or work. This is because aluminium is thin and rigid, transmitting sound vibrations easily.
UPVC is denser and more flexible, which dampens sound waves. Rain on a LESSO UPVC roof produces a soft, muted sound – far quieter than aluminium. For homes, schools, hospitals, and offices where a peaceful environment matters, UPVC is the preferred choice.
Winner: UPVC
Both materials are lightweight compared to clay or concrete tiles, which is a major advantage. However, there are differences:
Aluminium sheets typically weigh 3–8 kg/m² depending on thickness and profile.
UPVC sheets weigh 4–6 kg/m² – slightly heavier than the thinnest aluminium, but lighter than many aluminium profiles.
For most roofs, the weight difference is negligible. Both materials reduce structural load compared to traditional tiles. However, because UPVC is less prone to denting from hail or debris, it may be preferred in areas where impact resistance matters.
Winner: Tie (both are lightweight)
Aluminium is soft relative to steel. It dents easily from hail, falling branches, or even someone walking on the roof. Once dented, the appearance is permanently affected, and deep dents can trap water or snow.
UPVC is formulated with impact modifiers that absorb energy without cracking or denting. LESSO UPVC sheets can withstand hailstones up to 2.5 cm diameter and minor impacts from debris. While very severe impacts (e.g., large falling tree branch) could crack any material, UPVC’s resilience is superior to aluminium’s tendency to dent.
For roofs in hail‑prone regions or areas with overhanging trees, UPVC offers better long‑term appearance and performance.
Winner: UPVC
Aluminium roofing often comes with a painted or coated finish. Over time, UV radiation, salt spray, and pollution can cause this coating to fade, chalk, or peel. When the coating degrades, the bare aluminium may oxidise unevenly, leading to a blotchy appearance. To maintain aesthetics and protection, aluminium roofs may need periodic repainting or recoating – an added expense and hassle.
UPVC requires no painting, sealing, or rust treatment. The color is integral to the sheet and protected by a UV‑stabilised ASA layer. LESSO UPVC sheets retain their color and surface gloss for 15+ years with only occasional washing using water and mild detergent. No repainting, no coating renewal, no rust treatment.
Winner: UPVC
Aluminium is non‑combustible. It does not burn and will not spread flames – a definite safety advantage in fire‑prone areas.
UPVC is a plastic, but high‑quality UPVC sheets can be manufactured with fire‑retardant additives to achieve a B1 fire rating (self‑extinguishing). LESSO offers B1‑rated UPVC sheets that resist ignition and will not drip burning material. However, standard (non‑fire‑rated) UPVC sheets can melt under intense heat.
Conclusion: If fire safety is your absolute top priority and you cannot use fire‑rated UPVC, aluminium has an advantage. However, B1‑rated UPVC is widely accepted for residential and commercial buildings and meets most building codes.
Winner: Aluminium (marginally) – but fire‑rated UPVC is a strong alternative
Aluminium sheets are typically available in a limited range of colours through painted coatings. Over time, these coatings may fade unevenly.
UPVC sheets come in a wide variety of colours – terracotta, grey, blue, green, beige, white, and custom shades. The colour is part of the sheet, not just a surface coating. LESSO’s ASA top layer ensures uniform colour and long‑term fade resistance. Additionally, UPVC can be manufactured in tile‑effect or slate‑effect profiles that mimic traditional roofing materials.
For architectural versatility and long‑lasting colour, UPVC has the edge.
Winner: UPVC
Both materials are recyclable, which is positive for sustainability.
Aluminium production is energy‑intensive (mining, refining, smelting), but recycled aluminium uses only about 5% of the energy of primary production.
UPVC production has a lower carbon footprint than primary aluminium. LESSO uses virgin UPVC and operates ISO 14001‑certified environmental management systems. End‑of‑life UPVC sheets can be recycled into new products.
Neither material is clearly “greener” overall – it depends on the supply chain and recycling infrastructure. However, the longer lifespan and lower maintenance of UPVC may reduce replacement frequency and associated environmental impact.
Winner: Tie
Based on the above characteristics, here is a general guide:
| Application | Better Choice | Why |
|---|---|---|
| Coastal homes / salt‑air environments | UPVC | Complete rust‑proof, no salt corrosion |
| Poultry farms, dairy sheds | UPVC | Resists ammonia and chemicals |
| Chemical plants, industrial zones | UPVC | Corrosion‑resistant, chemical‑inert |
| Residential homes (patios, carports, verandas) | UPVC | Quiet during rain, cooler interior, low maintenance |
| Schools, hospitals, offices | UPVC | Noise reduction, thermal comfort |
| High‑fire‑risk areas (without fire‑rated UPVC) | Aluminium | Non‑combustible |
| Areas with very large hail ( >3 cm) | Aluminium (thick gauge) or polycarbonate | Metal resists puncturing better than UPVC |
| Very high‑wind / cyclone zones | Aluminium (if properly fastened) | Metal has higher tensile strength |
Note: For most common applications – especially in tropical, coastal, humid, or agricultural environments – UPVC is the superior choice. LESSO UPVC sheets are engineered to handle these conditions with ease.
While we cannot discuss specific prices, we can compare long‑term value.
Aluminium may have a lower upfront cost for thin, basic sheets. However, you must budget for potential repainting, coating renewal, and repairs for dents or corrosion. In harsh environments, aluminium may need replacement sooner than expected.
UPVC typically has a higher initial cost for quality sheets, but the total cost of ownership over 20–30 years is often lower because:
No repainting or rust treatment
No dent repairs
Lower energy bills (better insulation)
Longer lifespan with minimal maintenance
When you factor in maintenance, energy savings, and longevity, UPVC offers excellent value – especially from a trusted manufacturer like LESSO.
Winner: UPVC (for most applications)
Yes. UPVC contains no metal and is immune to rust, corrosion, and salt damage. LESSO UPVC sheets are ideal for coastal and humid regions.
Yes. Aluminium conducts heat rapidly, making the building interior hotter. UPVC provides natural thermal insulation, keeping interiors cooler.
UPVC is significantly quieter. The dense plastic dampens sound, while aluminium transmits noise like a drum.
Light foot traffic is possible, but aluminium dents easily. UPVC is not designed for walking either; always use crawl boards for maintenance.
Painted aluminium may need repainting every 5–10 years depending on environment. UPVC never needs painting.
LESSO offers B1 fire‑rated UPVC sheets (self‑extinguishing). Standard UPVC is not fire‑rated. For maximum fire safety, choose fire‑rated UPVC or aluminium.
UPVC. It resists ammonia, moisture, and chemicals, and it is quieter during rain – less stress for animals.
Quality UPVC sheets last 25–40 years with minimal maintenance. Aluminium can last 30–50 years but may require coating renewal and dent repair. Both are durable, but UPVC requires less upkeep.
Yes. UPVC is 100% recyclable. LESSO supports sustainable manufacturing and recycling initiatives.
No. Aluminium conducts heat, making the building hotter. UPVC insulates, keeping the interior cooler. In extreme heat, UPVC is more energy‑efficient.
For the majority of applications – especially in coastal, humid, tropical, agricultural, and residential settings – YES, UPVC roofing sheet is better than aluminium. The key advantages of UPVC are:
No rust or corrosion – even in salt spray and chemical environments.
Superior thermal insulation – lower indoor temperatures, reduced energy bills.
Quiet during rain – no loud drumming.
Low maintenance – no painting, no coating renewal, no dent repairs.
Long‑lasting colour – UV‑stabilised ASA layer resists fading.
Excellent long‑term value – lower total cost of ownership.
Aluminium still has a place where non‑combustibility is the absolute priority and fire‑rated UPVC is not available, or where very high wind loads exceed UPVC‘s rating. However, for most homeowners, builders, and facility managers, LESSO UPVC roofing sheets offer a superior combination of durability, comfort, and low maintenance.
Ready to experience the benefits of UPVC roofing? Contact LESSO today to discuss your project requirements. Our team will provide technical guidance, samples, and a personalised quote – without pressure, only honest advice.
Choose LESSO – built to last, designed for comfort.
