What are parapet walls?
parapet is a wall-like barrier at the edge of a
roof, terrace, balcony or other structure. Where
extending above a roof, it may simply be the portion of
an exterior wall that continues above the line of the
roof surface, or may be a continuation of a vertical
feature beneath the roof such as a fire wall or party
Why waterproof parapet walls?
wall left with no waterproofing can cause moisture
ingress through walls and at the edges of interior
ceilings. Many complaints about leaks in interior spaces
originate from inadequate waterproofing over parapet
walls. Often water ingress from parapet walls is visible
through clear blistering of paint in interior spaces.
The presence of a white powdery substance called
efflorescence further indicates moisture in walls; this
is a result of the lime in cement coming to the surface.
In the case of parapets the moisture is located fairly
high up on the wall, this must not be confused with
walls that have damp problems in its entirety, where a
uniform spread of damp is present.
Checking for waterproofing problems
on my parapet wall
wall may also show signs of inadequate waterproofing if
the exterior face of the wall is riddled with hairline
cracks and sometimes larger cracks. A parapet wall acts
as a barrier to the wind and other elements, if not
properly waterproofed it can allow moisture into a
building. Parapet walls are the meeting point for roof
sheets and waterproofing membranes, and so the parapet
wall waterproofing system must be applied taking into
account the type of flashings and counter-flashings to
be encountered as a result of terminating roof and
Anker Projects has proven expertise in the waterproofing
of parapet walls in the context of a holistic
waterproofing and roofing solutions