Status 09/2010
6.2
Tiles
After applying the adhesive, start installation from
the tiles laid out as a reference point or line.
In large
rooms we recommend laying in stages to avoid
offsets.
To wet the back, carefully rub or press on
the tiles.
This procedure may need to be repeated.
7
Sealing the seams
Sealing the seams is recommended in rooms where
the subfloor is to be protected against the ingress of
moisture. Welding must always be performed when
installing
on
DLW
KORKMENT
SPECIAL,
dry
constructions (e.g. chipboard/gypsum plasterboard)
and screeds with underfloor heating. The sections
cannot be welded until the adhesive has set.
Depending on the type of adhesive used and the
climatic conditions in the room, this may take several
days. The adhesive manufacturer's instructions
should be followed carefully.
7.1
Thermal seam sealing
The covering seam is milled out to a depth of 2/3 of
the covering thickness using a seam miller and
plane. The channel must then be cleaned carefully
(vacuumed or blown out). The seam width should be
around 3.5 mm.
DLW welding cord can be applied with the handheld
welding unit and fitted speed-welding nozzle, d = 5
mm. So as not to damage the PUR finish, we
recommend using speed-welding nozzles with a
very narrow air outlet. The working temperature is
around 450 to 500 °C, and the working speed
approx. 4 – 5 m per minute.
The projecting part of
the
welding
cord
is
removed
in
two
stages.
Immediately after being applied, the still warm
welding cord can be cut off using the quarter-moon
knife with the shoe attached. Then after the welding
cord has cooled off, the welding seam can be cut
flush to the covering surface with the knife.
7.2 Cold welding
DLW VINYL floorcoverings can also be welded with
cold-welding agent if required, but in this case the
seam has to be trimmed close, not force-cut. Ensure
that the cold welding agent does not penetrate to the
underlayer of the cut seam.
Details of cold welding techniques can be obtained
for example from:
Werner Müller GmbH
PVC-Kaltschweißtechnik
Rudolf-Diesel-Str. 7
D–67227 Frankenthal
Tel.
+49 (0) 62 33 – 3 79 30
Fax +49 (0) 62 33 – 3 79 320
www.
mueller-pvc-naht.de
8
DLW Korkment Special as
underlay
DLW
KORKMENT
SPECIAL
is
exclusively
recommended here as the insulating underlay. It is a
very fine-grained, highly compacted corkment that is
specially tailored to the properties of synthetic floor
coverings. DLW KORKMENT SPECIAL can be laid
on all prepared subfloors.
It can be laid from the roll
in the same direction as the upper floorcovering.
Seams should be offset by min.
50 cm.
The cut can
be made as a so-called double cut with a hooked
blade against a straight-edge. To bond emulsion or
2-component emulsion adhesives are used. The
floor covering should not commence until the
adhesive has set completely.
Suitable adhesives can be obtained directly from the
manufacturers (see item 2) or from the Armstrong
DLW advice service by telephoning +49 (0) 71
42 /
71 – 255.
9
Fitting floorcovering on
underfloor heating
DLW VINYL floorcoverings can be laid on subfloors
with underfloor heating. Their thermal resistance is
so low that it is virtually irrelevant for operation of the
heating
system
(specialist
information
sheet
"Beurteilen
und
Vorbereiten
von
Untergründen,
Verlegen
von
elastischen
und
textilen
Bodenbelägen, Schichtstoffelementen, Parkett und
Holzpflaster,
beheizte
und
unbeheizte
Fußbodenkonstruktionen" [assessing and preparing
subfloors,
installing
resilient
and
textile
floorcoverings, laminated elements, parquet and
wood-block
floors,
heated
and
unheated
floor
constructions"], published by the
Bundesverband
Estrich und Belag e.
V.
(German association for
screeds and floorcoverings)).
9.1
Dry constructions
Dry constructions may consist for example of
plasterboard/gypsum fibreboard. Armstrong DLW
floorcoverings may be fitted after preparing the
subfloor as specified by the relevant manufacturer.
9.2
Wet constructions (A1 – A3)
With wet constructions, the heating pipes are
embedded in a floating cement or anhydrite screed.
Before the floor covering is installed, the heating
system installer should ensure that the moisture
