What is concealed fix metal roofing

TLDR

Concealed fix metal roofing uses hidden clips instead of exposed fasteners, improving weather resistance, durability, and appearance while requiring careful estimating of sheets, clips, labor, and logistics.

Understanding concealed fix metal roofing systems

If you have recently started offering metal roofing to your customers, you may be surprised by how much there is to learn beyond profiles and finishes. Metal roofing systems vary widely, and concealed fix metal roofing is one of the most important systems to understand if you want to price jobs accurately and deliver high quality results.

Along with installation methods, concealed fix systems require a different estimating approach than traditional exposed fastener roofs. Understanding how these systems work is essential before setting them up in your construction estimating software.

What is concealed fix roofing

The concept behind concealed fix metal roofing is straightforward. Instead of fastening roof sheets directly through the metal with screws or nails, the sheets are attached using clips that are fixed to the roof structure underneath.

These clips are completely hidden once the roof sheets are installed. The panels either clip into place or are mechanically seamed over the clips, leaving no exposed fasteners on the roof surface.

This differs from traditional metal roofing, where fasteners penetrate the sheet itself and remain visible after installation.

Types of concealed fix metal roofing

There are several types of concealed fix metal roofing systems available. Some manufacturers produce proprietary profiles that require specific tooling and can only be supplied by that manufacturer. Other profiles are more widely available and compatible with multiple suppliers.

Some concealed fix systems are roll formed on site. In these cases, a mobile mill is brought to the job site and roof sheets are rolled to length as needed. This reduces joins and can improve weather performance, but it also adds complexity to logistics and labor planning.

Mechanical fix systems are another variation. Instead of interlocking panels that clip together, these systems are mechanically seamed on site. This process requires specialized equipment and additional labor time, which must be accounted for during estimating.

Benefits of concealed fix metal roofing

One of the biggest advantages of concealed fix metal roofing is its ability to manage water effectively. Because there are no fastener penetrations through the roof sheets, the risk of water ingress is significantly reduced.

These systems are also highly wind resistant. The clip fixing method provides strong attachment to the roof structure, making concealed fix roofing well suited for areas exposed to high winds.

In addition to performance benefits, concealed fix roofs offer a clean, modern appearance that many homeowners and architects prefer.

How to estimate concealed fix metal roofing

Estimating concealed fix metal roofing requires careful attention to detail. You need to know the effective cover width of the roof sheets so you can calculate the correct quantity of material.

Clips are another critical component. You must determine how many clips are required, what type of clips are specified, and how they are fixed to the roof structure. Depending on the system and substrate, this may involve screws or nails, each with different costs and labor implications.

Transportation should also be factored into your estimate. Roof sheets are often much longer than standard vehicles can safely carry, which may require a flatbed truck or specialized delivery.

Labor estimation is equally important. Installation rates vary by manufacturer and system type, especially if on-site roll forming or mechanical seaming is required. Most manufacturers can provide guidance on installation speed, which should be reflected in your labor allowances.

While concealed fix systems may seem complex at first, they typically involve fewer components than expected. Flashings and accessories are often similar to those used in traditional metal roofing. If you are already comfortable estimating standard metal roofs, you will find that concealed fix systems build on that knowledge rather than replacing it entirely.