1. Unsound plaster, render or screed should be removed and
surfaces made level. This should be achieved using
Wykamol’s Universal Mortar, or a 3:1 sand:cement mix
incorportating Renderproof Waterproofing Additive. Leave
all new works to dry thoroughly before CM3 Mesh
membranes are fixed.
2. In case of walls suffering from mould or masonry fungi, prior
to fixing the membrane, remove surface contamination by
brushing, then apply Microtech Biocide in line with the
relevant Technical Data Sheet
3. If dry rot (Serpula Lacrymans) is present in the walls, this will
require detailed assessment before proceeding. Please
contact the Wykamol Technical Department for further
advice.
4. Above ground level it is recommended, that where possible,
all sources of moisture are alleviated at the source using a
DPC such as Ultracure, before applying CM3 Mesh
Membrane. This reduces potential damage to masonry and
timber etc.

With studs facing the wall, fixing is carried out using Wykamol
CM Plaster Plugs or Brick Plugs.
1. Drill a hole through the centre of the stud. Take care when
drilling holes to avoid excessive masonry dust from falling
behind the cavity drain membrane.
2. Place the chosen plug (with seal for all underground
waterproofing applications) into the hole and drive the fixing
home with a rubber or wooden mallet.
3. We would suggest that spacing between plug fixings should
be no greater than 250 – 300 mm, to ensure a tight fix to the
wall. However, this may vary depending on chosen finishes,
dimensions of plasterboards and their exact application.
4. In above ground applications, seal the membranes by butt
jointing and oversealing with Wykamol Fibre Tape
Above Ground:
CM3 Mesh Membrane should finish at solid floor and ceiling
junctions.

Flat soffits below ground should never be lined with Wykamol
CM3 Mesh Membrane as it requires a minimum slope of 10%.
Take care when running CM3 Mesh Membrane around internal and
external corners to ensure the sheet is fixed tight to the angle,
ensuring well defined edges for subsequent plastering works

1. Check and overhaul rainwater goods to ensure they are clean
and in good working order. Repair or install drains to carry
away surface water.
2. If internal floors are below external ground level, form trenches
along the external face of the walls to at least 150 mm below
the proposed DPC level (where foundation depth allows). If
this approach is not feasible the DPC must be placed at 150
mm above external ground level and the internal walls tanked
below the DPC to prevent lateral migration of moisture/salts
(see Wykamol Re-Plastering Specifications and/or contact the
Wykamol Technical Department).
3. Remove skirtings, fixings and render/plaster to expose the line
of the proposed DPC (mortar bed). Internal plaster affected by
hydroscopic salts is removed from the area to be treated to a
height of 300 mm above the maximum level of the rising
damp.
4. Check flooring timbers for signs of fungal decay and
recommend repair/ replacement as appropriate.
5. Ensure wall cavities are cleared of debris.
Vertical DPCs should be provided to connect horizontal DPCs
where ground levels change and to isolate untreated wall areas
(adjoining properties, garden walls etc.) In most cases solid brick
walls may be drilled and injected from one side only.
For cavity walls each leaf may be dealt with as a separate 115 mm
thick wall (see coverage rates below). Alternatively, if preferred,
drill through the selected mortar course, across the cavity, then
drill the outer leaf of brickwork to a depth of 100 mm and inject
in one continuous process (the physical properties of Ultracure©
ensure the cream remains in contact with the surrounding mortar
even when the mortar bed is drilled through in this way). Always
ensure that the cavity is clear before treatment.
In random stone and rubble infill walls, as far as practically
possible, follow the mortar course at the appropriate level.
However, if the stone is of a porous type, it may be possible to
vary the drilling locations (mortar/stone) as long as the mortar
bed perpends are treated. In walls of a thickness greater than 350
mm, it is recommended that drilling is undertaken from both
sides at a corresponding height. In the case of drill holes
becoming blocked these should be re-drilled just prior to
injection or a new hole should be drilled nearby to ensure that an
adequate volume of Ultracure© is introduced.

Walls vary in thickness and type of construction so it is essential
these factors are taken into account before deciding on an
appropriate drilling pattern. DPC height should always be at least
150 mm above external ground level. In the case of solid floors,
insert the DPC as close to floor level as possible.

DRILL HOLE SIZE, DEPTH AND LOCATION: Drill 12 mm
diameter holes horizontally in the mortar bed at distances no
greater than 120 mm. The depth of the hole required for various
sizes of wall is shown in the table below (approx. 90% of any
given wall thickness). For walls of intermediate thickness the
depth of holes should be pro rata. Where the masonry is
irregular, ensure the horizontal drilling pattern targets the base of
all perpends of the course selected. Drill hole depth required,
dependent on wall thickness:

ULTRACURE INJECTION: Insert Ultracure cartridge into
appropriate gun applicator. Insert the applicator nozzle into the
full depth of the predrilled hole. Squeeze the gun and trigger and
back fill each hole fully with Ultracure© cream to within one
centimetre of the surface. When treating cavity walls from one
side make certain that the holes in each leaf are filled.

Remove by suitable means, all loose pointing, any remaining
render or plaster, wood, dust, grease, oil, organic growth or other
foreign materials that may cause contamination or adversely
affect adhesion.
Clean the hole, crack or joint thoroughly by wire brushing,
chiselling or scraping loose materials until a clean, sound substrate
remains.
Areas to be patched should be cut back and given a good
mechanical key. Feather edges are not suitable.
To seal leaks and cracks, openings must be chased out to
approximately 20 x 20 mm. The edges must be square or under
cut, avoiding V-shaped cuts. All loose material generated while
chasing out should be removed.

Due to the fast setting nature of HydraDry WaterStop, it is very
important to organise the work space before mixing commences.
Ensure the person undertaking the repair is situated close to the
repair area and the equipment required to carry out the repair is
easily accessible.
Recommended Water Additions
Size Pliable Mortar
1 Kg 250 – 270 ml
100 g 25 – 27 ml
When mixing HydraDry WaterStop, use ONLY CLEAN WATER and a
clean mixing vessel. For the best results the temperature of the mixing
water should be between 5°C and 10°C. The warmer the water is the
faster the mortar will begin to set.
Note: Mix only enough material for immediate use. WaterStop sets in
60 – 90 seconds and cannot be reworked once it has set.
Wearing chemical resistant gloves, mixing is ideally done by hand.
1. Measure out required water and powder into SEPARATE
containers.
2. Add the powder to the water and mix quickly and thoroughly.
3. Roll the mixture between your hands until a pliable, putty like
consistency is developed.
4. Once the materials start to warm-up, immediately apply the
product to the prepared area.
5. Hold in place until water leakage/seepage stops and the
product has cured (approximately 30 seconds).

All active water leaks must be stopped using Waterstop (rapid setting
plugging compound) before continuing to the next stage of application.
Uneven surfaces:
Remove by suitable means, all loose pointing, any remaining render or
plaster, wood, dust, grease, oil, organic growth or other foreign
materials that may cause contamination or adversely affect adhesion
properties. To create a level surface, Universal Mortar should be applied
in line with the relevant data sheet, which is available upon request or
can be downloaded from our website. Follow the Universal Mortar
priming requirements before application.
Level Surfaces:
If there is any exposed steel present, apply two coats of suitable
corrosion inhibitor to the exposed steel, by brush. Remove all loose
material and surface latencies, i.e. dust, oil, grease, corrosion and organic
growth, preferably by using wet grit or water blasting techniques. The
strength of the concrete subbase must be a minimum of 25 N/mm².
Note: Special precautions may be necessary to ensure a continuous
waterproof barrier at the wall to floor joints and corner joints. This is to
avoid sharp changes of angle in the tanking membrane. The joints
should be thoroughly raked out and cleaned prior to an application of
Universal Mortar as a fillet seal.
Construction Joints
For all construction joints including, angled, movement, expansion or
connection joints, please refer to the Wykamol Proflex Tape data
sheets.
Priming:
• Using a brush, roller or spray, apply SBR Latex, mixed 1:1 (by volume)
with water.
• Allow to become tacky to the touch. This will take approximately 30
minutes to 2 hours.

HydraDry Tanking Slurry’s consistency can be varied to suit the
application method.
Required Water Additions
Pack Size Brush Applied Trowel Applied Spray Applied
20Kg 3.2 – 4 Litre 3.2 – 3.6 Litre 3.5 – 4.2 Litre
When mixing HydraDry Tanking Slurry, use ONLY CLEAN WATER, a
clean mixing vessel and a mechanical mixer.
1. Pour min required addition of clean water in to the mixing vessel.
2. Using an electric paddle, gradually start to add the powder whilst
mixing under low shear to reduce dust generation.
3. Add all powder and increase mixing shear.
4. Mix for approx. 1 – 3 mins to achieve a uniform, lump free slurry.
5. If necessary, gradually add water and mix until desired consistency
is achieved. Do not exceed maximum required water additions as
this will result in the product becoming inaffective as a waterproof
barrier.
Note: Excessive mechanical mixing should be avoided. Mechanical
mixing time must not exceed 5 minutes.

Ensure surface is free from mould and fungus using MCS1 Mould
Clear Solution. Remove any loose paint, wallpaper, grease, oil
stains or any other finishes. Any cracks must be filled using a
crack filler and left to set before application can commence.
For plastic, metal or other surfaces that are not masonry, please
refer to the plastic or metal manufacturers data sheets for their
advice on the correct primers to use on their products.
Prior to applying the Wykamol ThermalDry water-based
product, or speak to our technical department for further
information if unsure on which surfaces the ThermalDry product
can be used on. An inspection should also be made to check for
any previous coatings or finishes, as the ThermalDry needs to
key to a surface or substrate.

Upon opening the tin, gently stir the medium in order to
ensure glass bubbles are evenly spread throughout.
DO NOT USE mechanical stirrer as this could damage the glass
beads