Page 11 - SureCav Design Handbook 2018

Quick Facts Page | 11

● Helps to prevent mould and mildew
Wind-Driven Rain
● BBA approved for any exposure zone
BBA approval in all exposure zones
● Completely waterproof envelope

Damage from moisture affecting buildings

One of the greatest threats to the integrity of the building structure come from water ingress,
one of the most common sources of moisture affecting buildings in the United Kingdom.
Damage from the build-up of moisture results in mould, mildew and condensation on windows
and in the loft space. Additionally, where there is a moisture problem in the wall cavity, damage
readily occurs to the insulation and wall ties, also affecting wall plates, the timber frame itself
and installed joinery. Preventing this from occurring is obviously a priority in the minds of all
designers and builders interested in quality construction.

The incidence of wind-driven rain is likely to be more
prevalent in properties closer to the western coast of
Britain and any increase in moisture giving rise to
wall saturation will require a managed construction.
The increased affect of wind driven rain will be
particularly relevant where external walls do not
have a suitable cavity or rain screen.

SureCav - the solution

SureCav25 and SureCav50 will prevent any water ingress
from wind driven rain when:
● Building external walls with any recognised material
● A moisture and mortar-free 25mm or 50mm residual
cavity will be maintained that will be easily ventilated

● Insulation is held in places at all times, enabling it to
work to its full efficiency
SureCav comes in packs of 10 and
includes all the joining strips you will SureCav25
need. Order special seal-washers if Ensures no water
building with timber-frame. penetration from
wind-driven rain
with a 25mm
cavity instead of
the usual 50mm
or even 75mm
required in high exposure zones. The barrier formed
by the panels, locked together by the joining strips,
will protect the structure in even the most exposed
weather conditions.