Trevors Compliance Tips:
Fixing Specifications
Typically provided by the material manufacturer, these specifications should always be followed carefully. Doing so not only helps ensure compliance with building regulations, but also plays a critical role in maintaining the roof’s performance i.e. keeping it watertight and resistant to wind uplift and potential failure. It also helps to ensure the roof achieves its expected lifespan.
We strongly recommend obtaining a project-specific fixing specification directly from the product manufacturer. This ensures a tailored fixing schedule that reflects the unique conditions of the build. When preparing these specifications, manufacturers will take into account factors such as:
- Roof dimensions and rafter length
- Roof pitch
- Building height and level of exposure
- Geographic location (for example, coastal areas or proximity to flight paths)
What Does a Fixing Specification Look Like?
For interlocking tiles, as an example, the minimum requirement is usually that each tile is mechanically fixed at least once, with additional fixings required around the perimeter where exposure to wind is greater. A typical specification might include:
- Every tile must be nailed at the top
- Perimeter tiles must be both nailed and clipped
- Stainless steel nails of a specified length must be used
Why Follow the Manufacturer’s Fixing Specification?
Adhering to the manufacturer’s fixing specification does more than ensure regulatory compliance; it also protects contractors from potential issues down the line.
In the event of a defect or failure, being able to demonstrate that the installation followed the manufacturer’s guidance can help avoid disputes and may allow the contractor to seek support or recourse directly from the manufacturer. tuSo make sure you keep a copy of the fixing specification in your project file.
