Application brief 03
What if a cast-in collar is damaged, contaminated or cannot be relied on after the pour?
Do not assume the penetration remains compliant. Fendix provides an assessed retrofit over supported existing cast-ins that are functional, non-functional or of unknown function.
See three non-functioning conditionsAs found on site
Each collar shown was identified on site as non-functioning. The visible conditions include damaged housing or closure components and concrete-slurry contamination.
The original housing and spring-loaded components are damaged, so the cast-in collar cannot be relied upon to activate as intended.
The Fendix Collar installs directly beneath the damaged SNAP cast-in collar and becomes the fire-stopping device without relying on its damaged closure mechanism.
Slurry has entered or covered the collar at the slab face, obstructing components intended to activate during a fire.
Where the buried cast-in cannot be relied upon, the Fendix Collar provides a direct assessed retrofit beneath it—avoiding the fire-rated bulkhead or pipe alterations that may otherwise be required.
The cast-in collar's springs and intumescent material are damaged, loose or no longer present, so it cannot be relied upon as the fire-stopping device. A conventional circular fire collar cannot simply be installed over the top to make the penetration compliant. The assessed retrofit solution is the Fendix Collar.
The Fendix Collar installs directly beneath the damaged cast-in and becomes the fire-stopping solution—avoiding the fire-rated bulkhead that was traditionally required.
In the supported configuration, Fendix becomes the main fire-stopping device below the existing cast-in. This separate-site photograph shows the completed retrofit approach.
View Application Brief 01 for completed Fendix installations over existing cast-ins →
Assessed retrofit pathway
RTL FA 2981.02 includes supported Fendix configurations beneath existing cast-in collars that are functional, non-functional or of unknown function. Fendix does not restore the damaged collar. It becomes the fire-stopping solution beneath it—avoiding the pipe alterations or fire-rated bulkhead that may otherwise be required.
View Test Report PDFFound one on site?
Plumbers, builders, passive-fire installers and fire certifiers can send Fendix a site photo. We will help you move straight to the assessed retrofit solution.
Send the damaged cast-inConfirm the complete pipe, slab, fitting, existing cast-in, sealant, fixing and FRL configuration against RTL FA 2981.02 before installation.
See completed retrofitsQuick answers
Yes. RTL FA 2981.02 includes Fendix installed beneath supported existing cast-in collars that are functional, non-functional or of unknown function. Fendix becomes the fire-stopping device beneath the existing collar.
No. The Fendix Collar installs directly beneath the damaged cast-in collar, so the existing collar can remain in place.
Yes. Fendix installs beneath the existing cast-in and provides the fire-stopping solution, avoiding the bulkhead or pipe alterations that may otherwise be required.
Found a damaged cast-in?
Send a clear photograph and the pipe size. We will take it from there.
