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 sheet (kg) | 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.
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. Each zinc layer covering the sheets can weigh 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
Can the density of metal roofing tile be used for precise calculations?
The density and weight values for metal roofing tile in this article are reference values. They are suitable for preliminary estimates, but design, construction, production and other critical calculations should be checked against standards, material datasheets or measurement results.
Why can the actual weight of metal roofing tile differ from the table?
The actual weight of metal roofing tile depends on composition, moisture, temperature, porosity, fraction size, material grade and measurement conditions. Because of this, real values may differ from the average table data.
How do you calculate the mass of metal roofing tile from density?
For an approximate calculation, use the formula: mass = density × volume. If the density of metal roofing tile is given in kg/m³ and the volume is in m³, the result will be in kilograms.