In recent years, lining blockwork or concrete walls with plasterboard has become very common. The wall liner systems use adjustable brackets to level irregularities on uneven layers and they can accommodate large service runs with little or no preparation needed, making them very popular on site.
In corridors where a straight and smooth wall is highly desirable, dot and dab or a metal stud system (for example GypLyner) is used to line the rigid wall construction with a plasterboard layer that can be finished to a high standard.
The Problem
This wall lining system creates a void between the finished wall surface, and the actual fire line is an untested detail for a fire rated door. Fitting a riser door into these wall systems means it becomes non-fire rated, and unfortunately can result in major ramifications should a fire break out of either side of the wall.
The Solution
Selo have designed a system that projects the fire line from the blockwork or concrete, out to the face of the door/wall to create a continuous fire integrity barrier: Nulfire – check link here
What is Nulfire?
Nulfire is installed into the primary fire-rated wall and projects the Quadra forward to be in line with the wall liner. The Quadra Riser Door fire rating is then protected, and a smooth surface finish is achieved.
Points to note:
- Fire rated to E120
- Currently available for fitment with standard Quadra single and double doors
- Projection from the primary wall up to 82mm!
- Door sizes up to 950 x 2400mm
You can watch Nulfire video here.
The grey line shows the position of the Nulfire frame