Technical Bulletins

How to form ‘Pierced Fix’ Perimeter Details?

How to form ‘Concealed’ or ‘Secret Fix’ Perimeter Details?

The ONLY Metal Perimeter Roof Details backed with the ‘Guardian’ System Warranty

Perimeter roof details are one of the least considered aspects of any metal roofing & cladding system and yet in most cases these details are not guaranteed either by the supplier or the installer. In any metal roof system the perimeter roof details are one of the most essential details to ensure no long term water ingress and yet are not covered in most manufacturers or installers guarantees.

Metal roof sheeting, if installed correctly, rarely leaks and yet the areas where water ingress is a typical concern is the ridge, barges, change in angle or penetrations. These perimeter roof details are generally left to the installer to design and in most cases are constructed on the basis of cost saving i.e. how many flashings can be made out of a flat sheet rather than technical merits.

As one of the only designers, specifiers, installer and maintainers of metal roofing and cladding systems, who provides a system warranty that includes design, materials, workmanship and maintenance for up to 20 years, we believe it is essential to provide technical information of how these perimeter roof details should be constructed to achieve the guaranteed length of term.

Please watch this space over the next few weeks Concealed or ‘Secret Fix’ perimeter roof details will be uploaded.

The below documents clearly show how to correctly construct the perimeter, end & side lap details and the impact of roof pitch on the construction of the detail.

You may ask yourself the question “Have the metal roofing perimeter details on your building been installed correctly to provide the length of guarantee you expect?”