Fillet
A curved or angled cement mortar profile formed at an internal angle so that a waterproofing layer turns the corner on a curve rather than a sharp right angle.
On an actual building
Coatings and membranes thin and split at sharp internal angles, and unsupported membrane bridging a corner tears. The wall-to-base junction of a water tank is the classic location.
What we most often have to correct
That it is a finishing detail. It is structural to the waterproofing, and its absence is a routine cause of failure at junctions.
Where this comes up in our work
Terms that come up alongside this one
- Upturn (Skirting)
The vertical continuation of a waterproofing layer up an adjoining wall or parapet, terminated mechanically at the top..
- Overhead Water Tank (OHWT)
An elevated storage tank, usually at terrace level, feeding the building by gravity..
- Lift Pit
The recess at the bottom of a lift shaft housing buffers and equipment, and the lowest point of most buildings..
Fillet — questions we get asked
What does fillet mean in waterproofing?
A curved or angled cement mortar profile formed at an internal angle so that a waterproofing layer turns the corner on a curve rather than a sharp right angle.
Why does fillet matter on a real project?
Coatings and membranes thin and split at sharp internal angles, and unsupported membrane bridging a corner tears. The wall-to-base junction of a water tank is the classic location.
What do people commonly get wrong about fillet?
That it is a finishing detail. It is structural to the waterproofing, and its absence is a routine cause of failure at junctions.
Have a building showing this?
If a term on this page describes something you are looking at, a site inspection will tell you how far it has gone and what it needs. It costs nothing.
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