A roof is a fundamental element of any structure and it serves as a layer between the interiors and the outside world. While giving protection against external elements, roofing sheets also add to the aesthetic appeal of your house. Choosing roofing sheets for your home construction project or renovation project can be a huge investment. Therefore, it is essential to understand the different roofing materials.
What are the different types of roofing sheets?
The roofing industry in India has seen advancements over the years, with the growth of new roofing materials. With growing awareness, we are witnessing the emergence of green building concepts and the elimination of carcinogenic materials.
There has been a significant shift from the traditional roofing materials like asbestos and galvanised steel sheets, to the new-age aluminum zinc-coated sheets. Roofing sheets for house, if mounted properly, can increase the longevity of the roof to a great extent.
These are some commonly used roofing sheets in the construction industry.
Corrugated sheet for roof
Corrugated roofing sheets are largely used in industries, including architecture, construction, packing, printing and the medical sector.
Advantages: They provide excellent protection and have better durability and strength due to their rippled structure. It can withstand severe impacts from falling objects and needs little maintenance.
These roofing sheets are classified into the following categories:
Galvanised steel sheets
These are carbon steel sheets coated with zinc, produced through a process known as continuous hot dip.
Polyester painted sheets
These sheets are used in agricultural structures and are quite an affordable option. However, these types of sheets need maintenance and the installation is prone to scratches.
PVC plastisol-coated sheets
Known for being lightweight and weather-resistant, these type of steel sheets are treated with primer paint and PVC (Polyvinyl chloride) is rolled over them.
These are corrugated roofing sheets produced from bitumen. They are waterproof, durable and long-lasting.
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Metal roofing sheets
Metal roofing sheets are eco-friendly roofing solutions, as they can be recycled. Generally, they are made of tin, zinc, aluminium and copper. Metal roof sheets are similar to corrugated roofing sheets in terms of the composition but they have fewer curves. You will find numerous styles, textures and colours in this class of roofing sheets and can make a choice between contemporary or traditional designs for your home.
Advantages: They are easy to install and can be customised for building rooftops, depending on factors like durability, price, energy efficiency and longevity. Roofing panels made of metal can withstand extreme weather conditions like heavy rains, snow and even fire. They are also pest-resistant and are preferred, owing to their longevity and durability. Metal roofs are excellent insulators and are widely used in garden buildings, garages, backyards, household cladding and industrial roofs.
Plastic roofing sheets
Widely used for commercial and domestic roofing, plastic roofing sheets provide protection against UV radiation and extreme weather conditions. It is majorly used in temporary structures, farmhouses, vehicle parking garages and bungalow claddings. The durability depends upon the type of plastic chosen for the roofing sheet.
Advantages: Plastic roofing sheets are easy to install, flexible, corrosion-resistant, lightweight and resistant to extreme weather conditions. They may be less expensive than metal roofing sheets but the overall construction cost may increase, if you are opting for high-quality plastic materials. They offer good insulation from high temperatures and sound.
Polycarbonate roofing sheets
Polycarbonate is an amorphous and transparent thermoplastic, comprising carbonate groups in its structure. They have large-scale application in industrial and commercial areas. Due to their transparency, polycarbonate roofing sheets are ideal for structures where ample sunlight is required, such as gardens, patios, swimming pools, warehouses, etc.
Advantages: Polycarbonate sheeting is an excellent option for roofs, owing to its properties – it is lightweight, highly durable, UV-resistant, fire-resistant and has low maintenance cost. Since they are pH-neutral, they can withstand contrasting temperatures while maintaining stability.
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Roofing sheets price in India
|Type of roofing sheets||Price range in India per sq metre (approximate)|
|Corrugated roofing sheets||Rs 300-Rs 500|
|Metal roofing sheet||Rs 250-Rs 350|
|Plastic roofing sheets||Rs 650-Rs 1,800|
|Polycarbonate roofing sheets||Rs 800-Rs 1,200|
Factors to consider when choosing roofing materials
- Weight: It is necessary to consider the weight of the roofing sheets, as this could have an impact on the structural integrity of your house.
- Weather conditions: Studying the local climate will help you decide on the material to be chosen, depending on how tough and heat-resistant it needs to be.
- Colour: You can explore various colour options, to select one that matches the overall aesthetics, while meeting the functional needs.
- Energy efficiency: Understand the thermal properties of the roofing materials and choose one that can lower your energy bills.
- Cost: The price of the roofing sheets depends on the quality and brand, which must be taken into account while deciding the overall construction cost.
- Maintenance: Some materials may need higher maintenance than others. So, it is a crucial factor you cannot overlook.
What is FRP roofing sheet?
FRP (fibre-reinforced plastic) refers to a class of plastic that is reinforced with glass fibre. They are known for being lightweight and corrosion-resistant and possessing high strength.
Which is best roofing sheets?
Metal roofing sheets are the most inexpensive option, while corrugated roof sheets are extremely durable. Plastic roofing sheets are lightweight, while polycarbonate sheets are transparent and apt for outdoor use. Hence the best sheet will depend on the individual requirement and budget.