The most common mistakes when installing roofing – how to avoid them?

Estimated reading time: 6 minutes

A roof is one of the most important elements of any building – it protects us from rain, wind, and heat loss. However, even the highest quality roofing will fail if installed incorrectly. Learn about the most common mistakes when installing a sheet metal roof and how to effectively avoid them using proven Bratex solutions.

A roof is a system – not just sheets of metal

While many investors focus on the choice of profile, its color, and shape, the durability of a roof depends primarily on the proper installation of the entire system. A roof is not only composed of sheet metal, but also of flashings, accessories, and system ventilation strips. Only if all these elements are properly selected and installed will a roof last for years.

Why is correct installation so important?

A poorly constructed roof can lead to many problems, such as:

• leaks and moisture,
• deformations and distortions of sheet metal,
• corrosion or damage to coatings,
• loss of warranty provided by the manufacturer.

As a manufacturer of Bratex roofing systems, we understand the importance of professional installation. Therefore, below we describe the 5 most common mistakes and how to avoid them.

The 5 most common mistakes when installing roofing

1. Incorrect mounting of metal roof tiles

Screws are installed perpendicular to the surface, at designated mounting points – most often in the lower embossments of the sheet, which ensure stability and tightness. Installation errors can cause leaks, wind-induced fastener breakage, and thermal damage to the sheet metal.

How to avoid this?

• Use certified screws with EPDM seals (self-vulcanizing).
• Do not tighten the screws too much to avoid deforming the sheet metal.
• Install screws according to the manufacturer's instructions, using the appropriate spacing and mounting locations.

2. No compensation for thermal expansion

Roof sheathing "moves"—it expands and contracts with different temperatures. Leaving no room for thermal movement can lead to:

• cracking of the paint coating,
• permanent deformation of sheets,
• pulling out screws.

Solutions from Bratex:

• Apply screws correctly where required.
• Do not force the screws – allow for a slight “movement” of the sheet metal.
• Many Bratex products feature factory-designed solutions that compensate for sheet movement.

3. Errors in sheet metal work

Improperly executed or leaky flashings lead to dampness in the structure and leaks inside the building, which may result in damage to the thermal insulation and wood.

How to proceed?

• Use only original Bratex system flashings, which are perfectly matched and ensure complete tightness.
• Use dedicated expansion tapes and seals.
• Perform machining according to the manufacturer's instructions, correctly forming and attaching the elements.

4. Incorrect gutter installation

Gutters installed without a proper slope do not drain rainwater effectively, which can lead to overflow. Installing brackets too sparsely causes sagging and the risk of falling off.

Assembly instructions:

• Install the hooks according to the recommendations together with the elements dedicated to the Bratex system.
• Use the system corners, funnels and drains offered by Bratex, which ensure the consistency and tightness of the entire system.

5. Lack of proper roof ventilation

Lack of effective roof ventilation causes moisture to condense under the roof covering, which leads to corrosion of the sheet metal, rotting of the wooden structure and dampness of the insulation.

How to ensure ventilation?

• Ensure free air flow under the roof covering by using ridge strips, ventilation shafts and vapor-permeable membranes.
• Use Bratex system solutions that are designed to protect your roof and improve ventilation.
• Regularly check the airflow openings and the condition of safety elements.

What are the risks of assembly errors?

Seemingly minor omissions can lead to:

• leaks and moisture in structures,
• permanent deformations and damage to sheet metal,
• loss of manufacturer's warranty,
• shortening the durability of the entire roof and the need for expensive repairs.

How to avoid mistakes? Proven practices

• Follow the manufacturer's instructions. Bratex provides detailed installation instructions and training videos for each of its systems.
• Hire certified roofers. It is worth choosing professionals trained and recommended by the manufacturer.
• Don't skimp on accessories. Every element, from screws and tapes to ventilation systems, is important for the durability and aesthetics of the roof.
• Use complete systems. This ensures that all components work together and provide maximum protection and functionality.

Summary – good installation means a durable roof

A sheet metal roof is an investment that will last for decades, but only if it's installed correctly and thoroughly. At Bratex, we design roofing systems to simplify installation and minimize the risk of errors. Remember – even the best materials cannot replace the experience and diligence of the contractors.

Want to ensure your roof is durable, airtight, and aesthetically pleasing? Choose proven solutions, complete Bratex systems, and certified contractors. We'll take care of the rest.