F. Ball RAG 2026 - Online Version - Flipbook - Page 177
Moisture Measurement & Control
RAG® 2026
STEP 3 - SOLVE IT
If relative humidity is above 75%** treatment is required.
F. Ball recommend the application of the appropriate
Stopgap waterproof surfaces membrane or Stopgap
Isolator Membrane.
SOLVE THE PROBLEM WITH
WHAT IF THERE ARE OTHER
A WATERPROOF SURFACE
PROBLEMS?
MEMBRANE
A Waterproof Surface Membrane (WSM) is designed to control water
vapour transmission. WSM’s are typically formed by applying one or
two coats of an Epoxy Resin which bonds to the floor surface to
create a waterproof layer. A proven alternative is a WSM in the form
of sheet membranes such as Stopgap Isolator.
Stopgap Isolator is a loose lay fibre reinforced vinyl which sits proud of
the subfloor yet allows a floorcovering to be bonded to its upper
surface. Once installed it is very hard to believe that the floorcovering
is not adhered directly to the floor. With Isolator, the WSM can simply
be lifted and removed at a later date without any damage to the
subfloor - an important consideration where heritage floors are
concerned or where a building is to be occupied on a limited tenancy
and floors will later need to be returned to their original condition.
The appropriate treatment depends on the Relative Humidity (RH)
of the floor:
The F. Ball high performance range of Stopgap waterproof
surface membranes; F77, F78 and Stopgap Isolator
Membrane have been specifically developed to provide
a moisture solution for Relative Humidity (RH) values
between 75% and 98%. Please refer to the products
technical data sheet or contact Technical Service for advice.
If the floor suffers from other problems in addition to moisture, these
can generally be overcome by using one of F. Ball’s specialist range of
underlayments in conjunction with the WSM. For example:
• Stopgap 1200 or Stopgap 1500 smoothing compounds can be used
under Stopgap Waterproof Surface Membranes.
• When time is important, Stopgap Fast-Track 30 can be used over
the appropriate Stopgap WSM. Stopgap Fast-Track 30’s unique
rapid setting, rapid drying technology allows the floor to be
smoothed and levelled and is ready to receive floorcoverings
from 45 minutes.
For details of other products that can be used in conjunction with
WSM’s please either contact F. Ball’s Technical Service Department,
view the F. Ball website online at www.f-ball.com or consult
F. Ball publications or Individual Product Data Sheets.
Many old floors may well have previously been painted or be suffering
from efflorescence. Where the subfloor is flaking or contaminated,
Isolator Membrane provides a solution as well as providing an
effective WSM. For advice on subfloors refer to the F. Ball Subfloor
Preparation Guide.
F. Ball manufacture a complete range of primers and adhesives for use
with WSM’s.
If there is no DPM or the DPM is damaged, F. Ball recommend
Stopgap F77 or Stopgap Isolator Membrane.
For installations where speed is important, Stopgap waterproof
surface membranes can cure in as little as 60 mins at 20°C.
Alternatively, Stopgap Isolator can be laid directly on the floor
and a floorcovering installed immediately using the recommended
Styccobond adhesive.
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