Roofline Closure Systems

Roofline closure systems have now been approved for PAS projects, which means that metal flashings can be used to protect External Wall Insulation (EWI) systems instead of extending rooflines, although, extending the roofline is the most recommended option.

Because roofline needs can differ greatly depending on the specific project or property, a variety of solutions are necessary. Since standard design details can’t account for every situation, a set of Design Principles has been created. These principles offer flexibility while still ensuring that EWI systems are protected effectively and last for a long time.

Here’s a summary of the new guidance and what you need to know about installation going forward.

Roofline closure system solutions are developed based on a set of core Design Principles. This ensures that the designs can be customized to fit the various rooflines and features of different properties, as long as these principles are followed. For further details, see the information below.

To successfully install Roofline Closure Systems, it’s important to conduct a comprehensive property survey first. This survey is crucial for determining if the systems are appropriate for the property and for identifying all the necessary details. Catching these details early is key, as they may involve various specific requirements.

Precise measurement and documentation of the current roof overhang are critical because they influence the specifications needed for the installation. Additionally, assessing the condition of the substrate is essential to ensure the property can support the installation, especially when grind-in flashings are involved.

*Some properties have roof junctions that are so challenging to address that extending the roofline may be the best solution.

A Survey Form must be completed to record the survey findings, substrate condition, existing overhangs, etc.  The survey form must be submitted to apply for a project warranty.

The Roofline Closure System Principles mandate two layers of protection over the top of the EWI system. This can be accomplished in different ways, with Licata providing two standard options. The choice of installation method will determine the specific Licata details needed.

Adding a membrane beneath the primary flashing can be a cost-effective approach. Licata offers a specialised membrane stop bead (MSB) designed to be placed at the top of the insulation board, featuring an adhesive tape to secure the front of the membrane.

Adding a secondary flashing beneath the existing one can be a quick and straightforward solution. This approach is often more practical, particularly when dealing with installation in challenging UK wind and weather conditions. The Licata TCP Under Trim is an angled flashing that easily fits below the primary flashing to provide the necessary protection. The trims interlock and overlap, eliminating the need for jointing pieces.

The Licata Roofline Closure System Guide outlines different solutions, with the best option depending on factors like the existing overhang, the chosen secondary protection, potential cold bridging, and the specific characteristics of the property’s current roofline.

When installing the Roofline Closure System, you need to fill out a checklist that details how the installation aligns with the system’s principles. Additionally, you must take photos of the different stages of the installation process. Both the completed checklist and the photos are necessary when applying for a project warranty.

The principles of the Roofline Closure System set out minimum standards for the flashings that Licata components are made to meet.