Specific Weight of Metal Roofing Tile, Weight Calculations and Service Life
Metal tile roofing has become widely popular due to its quality and weight advantages. An important factor when choosing a roofing material is the installation method. Thanks to its distinctive qualities, metal roofing tile can be installed even by a beginner.
Metal roofing tile consists of galvanized steel sheets covered with an anti-corrosion polymer layer. This production method makes it possible to create a strong and durable material that is resistant to temperature and humidity changes. On the building materials market, metal roofing tile is available with polyester, matte polyester, plastisol, pural and PVDF coatings. They differ in appearance and coating thickness. Today, glossy metal roofing tile has become more popular.
Metal Roofing Tile Weight Calculations
During major roof repairs, it is very important to calculate the weight of roofing materials in advance. Professional construction crews measure and calculate material requirements at the beginning of their work. This is related to the individual strength of the rafter system. If such measurements are neglected, the roof may not withstand the load and the repair may fail. In addition, many suppliers are ready to provide customers with metal roofing tile of the required size. The longer the roofing sheets are, the more airtight and stable the roof will be. It is also important to consider the mass of precipitation, which creates an additional load on the roof.
Specific Weight and Service Life of Metal Roofing Tile
It should be understood that each type of metal roofing tile has its own service life. The main types, their weight and duration of use are shown in the table.
| Coating type | Weight of metal roofing tile (kg/m²) | Service life |
| Polyester | 3,6 | 20 years |
| Pural | 5 | 25 years |
| PVDF | 4,5 | 35 years |
| Plastisol | 5,5 | 30 years |
The weight of metal roofing tile directly depends on the sheet thickness. Polyester has the thinnest layer, so its weight is about 3.6 kg/m².
Roofing made of galvanized steel coated with plastisol is popular because of its resistance to temperature changes and humidity. The specific weight of such metal roofing tile is one of the highest, about 5.5 kg/m². Metal roofing tile with double-sided zinc coating is considered stronger and more durable. Zinc coating weight is often specified as the total for both sides of the sheet: for example, 275 g/m². Such metal roofing tile can serve for up to 50 years.
If you need a strong structure that will last for many years and will not require repair, it is better to choose metal roofing tile with zinc coating above 220 g/m². In this case, saving on material can negatively affect the result.
Frequently Asked Questions
How much does 1 m² of metal roofing tile weigh?
The article gives an approximate range of 3.6-5.5 kg/m² depending on coating and sheet thickness. The actual weight should be checked in the data sheet of the specific manufacturer.
What affects the weight of metal roofing tile?
The main factors are steel sheet thickness, zinc coating mass, polymer coating type and sheet profile.
Can the service life in the table be treated as a warranty?
No. The service life in the table is approximate. In practice it depends on steel quality, zinc coating, polymer coating, installation and roof operating conditions.