Note: Descriptions are shown in the official language in which they were submitted.
CA 02971960 2017-06-22
9
- 1 -
Joint-Sealing Tape and Sealing Assembly Having Such a Sealing Tape
DESCRIPTION
The present invention relates to a joint-sealing tape as well as a sealing
arrangement with such sealing tape for sealing of building structure joints,
especially for sealing against sound and smoke and if applicable against fire.
In particular, the invention relates to acoustic, smokeproof and/or fireproof
sealing of connecting joints in drywalls, especially of expansion joints.
These are
found in the region of connection to the inter-story ceiling, to the floor and
to
massive walls. Due to weight loading or thermal influences, the ceiling in
buildings may be forced upward or downward. To prevent damage to the
drywall, the upper connecting joint in this case is made as an expansion
joint.
The ceiling profile is made in such a way that a relative movement between
ceiling profile and the vertical wall components is possible.
In general, a channel profile constituting part of the studwork is fastened to
the
connecting building parts. The gypsum boards themselves are attached at a
well-defined spacing to the connecting building part. Usually sealing of the
system is provided in the gap between gypsum board and ceiling. For this
purpose, either a suitable sealing compound is introduced or else the gap is
filled with mineral wool and provided at the surface with a sealing layer. In
both
cases, the material present in the joint presents relatively strong resistance
to
movement, with the consequence that comparatively large joint widths are
necessary in order to achieve adequate movement absorption.
In particular, sealing of the gap with sealing compound has some
disadvantages.
It is particularly laborious, and in the course of time the sealing tends to
crack
when overloaded. Furthermore, sealing can be performed only after the gypsum
boards have been mounted, and it requires access to the finished drywall from
both sides. Furthermore, this procedure is error-prone, since the user himself
or
herself must dose the correct quantity of material in order to seal the gap
CA 02971960 2017-06-22
- 2 -
adequately. Above and beyond this, the drywall builder must make the width of
the joint correspond to the material and expansion properties of the sealing
compound. During installation of the sealing compound, nothing but the joint
can
be filled. During expansion of the gap, it must be ensured that the sealing
compound adheres sufficiently strongly to the underlying surface and that it
is
able to absorb the tensile forces that develop. Frequently this not the case,
and
the danger exists that the sealing compound will become detached from the
underlying surface or that the sealing compound itself will be overloaded and
tear. In the case of a narrower gap, the sealing compound can be compressed to
only a limited extent, because of its material properties, and the danger
exists
that it will be forced out of the gap if the joint is incorrectly dimensioned.
Due to
the limited expansion and compression capability of the sealing compound (max.
+/- 25%), it is very important to ensure adequately large dimensioning of the
spacing between gypsum board and ceiling. This is frequently underestimated,
and so adequate imperviousness often cannot be guaranteed during use of
customary sealing compounds.
Some further approaches exist for sealing of joints, especially joint cords or
joint
sprays, which to some extent suffer from the same disadvantages as have been
described for sealing compounds.
The object of the invention is to provide a joint-sealing tape that avoids the
disadvantages of the known materials, that in particular is easier and safer
to
use, simplifies the mounting of further building parts and ensures good
sealing
as soon as it is applied.
A further object of the invention is to provide an arrangement that, in the
event of
fire, permits better sealing of the joint between two building parts,
especially
between a drywall and a connecting building part, such as a wall, a ceiling or
a
floor, and thus provides better and durable sealing against sound and/or smoke
and if necessary better and durable fire protection, and can be mounted
reliably
and free of defects with little work effort. Furthermore, the invention makes
it
possible, by appropriate choice of the sealing materials, to adjust the proper
spacing of gypsum boards relative to the connecting building part, especially
relative to the floor, without additional auxiliary means.
CA 02971960 2017-06-22
- 3 -
According to the invention, a joint-sealing tape is provided for sealing a
joint
between a first building part and a second building part, with an elongated
carrier
and at least two separate sealing strips, which are disposed on the carrier,
spaced apart, side-by-side and running in the longitudinal direction of the
carrier,
which tape is characterized in that the sealing strips have a round cross
section.
Preferably the sealing strips are disposed on the outer region of the carrier.
With the inventive joint-sealing tape, irregularities of the surface of a
building part
can be safely sealed as soon as one building part is disposed on another
building part, since the sealing strips of the joint-sealing tape are pressed
sufficiently firmly against the surface of the one building part and at the
same
time against the side faces of the other building part.
The carrier of the joint-sealing tape may consist of a film, for example of a
plastic
film, of a fabric, especially of a noncombustible material, such as inorganic
fibers, for example glass fibers, a nonwoven or the like.
According to the invention, the sealing strips consist of a deformable
material.
This material may be either plastically or elastically deformable.
"Deformable"
means that irregularities in the building part, against which the sealing
strips are
pressed, can be evened out. In this connection, "plastically deformable" means
that the sealing strips are deformable and no longer return to their original
shape
after deformation. Analogously, "elastically deformable" means that the
sealing
strips are deformable and return to their original shape after deformation,
i.e. the
material can be deformed reversibly to a certain extent. In particular, the
sealing
strips consist at least partly, preferably completely of a material that is
resilient
after compression, for example such as foam, sponge rubber, cellular rubber or
the like. The inventive sealing strips preferably consist of a soft foam that
is
resilient after compression. Common foams such as polyethylene and
polyurethane foams or cellular rubber can be mentioned as foam material. This
foam may be an open-celled foam with very low air passage resistance, or else
an approximately closed-celled foam with extremely low air permeability
values.
Even foams with air permeability values lying between the two extreme cases
mentioned in the foregoing may be used within the scope of the present
invention. The foam may be impregnated with an impregnating agent that
increases the sealing properties of the foam. In order to achieve
imperviousness
CA 02971960 2017-06-22
3 i
3 3
- 4 -
to smoke, at least the outer surface of the sealing strips must be of closed-
pore
nature. Alternatively, an open-celled sealing strip may be provided with a
cover
layer or jacket, for example of a film, especially plastic film. The cover
layer or
the jacket may be formed by the carrier or by a separate material.
It has proved advantageous when the sealing elements consist of a slow-burning
foam, such a cellular rubber or polyurethane foam, for example. In the case of
a
slow-burning foam, there is no possibility that fire will be propagated by the
foam. Spontaneous inflammation is ruled out by the above-mentioned foam-type
starting materials. It is also advantageous that no dripping occurs in the
event of
fire. A slow-burning foam should still have at least 20%, still at least 25%,
preferably still at least 30%, between 20% and 60%, between 20% and 40%,
preferably between 25% and 30% of its initial volume in a temperature range
between 500 C and 800 C. Furthermore, a slow-burning foam should still have
at least 10%, at least 20%, preferably still at least 30%, between 10% and
40%,
between 10% and 30%, preferably between 15% and 20% of its initial mass in a
temperature range between 500 C and 800 C.
Furthermore, the material may contain appropriate additives if fire protection
properties such as intumescence, for example, are desired. In this connection,
"intumescence" means that, under the effect of heat, such as in the event of
fire,
the material swells and forms an insulating layer of flame-retardant material.
The
formation of a voluminous insulating layer, namely an ash layer, may take
place
due to the chemical reaction of a mixture of compounds that are appropriately
matched to one another and that react with one another under the effect of
heat.
Such systems are known to the person skilled in the art as chemical
intumescence, and they may be used according to the invention. Alternatively,
the voluminous insulating layer may be formed by swelling of an individual
compound, which releases gases under the effect of heat, even though no
chemical reaction has occurred between two compounds. Such systems are
known to the person skilled in the art as physical intumescence, and they may
also be used according to the invention. According to the invention, the two
systems may be used respectively alone or together as a combination.
In some embodiments, it is even sufficient when the carrier alone is
impervious
to smoke and/or gases.
,
CA 02971960 2017-06-22
- 5 -
It must be ensured that, after installation of the joint-sealing tape, this
seals the
building-structure joint against the penetration of sound, smoke, gases and/or
fire, depending on which property is desired or required.
The sealing strips may consist of one piece made from one material or else of
multiple parts made from several materials and, for example, may exist as a
layered body.
The positioning of the sealing elements on the connecting element may be
achieved by fastening means, for example in the form of an adhesive layer,
especially a self-adhesive layer, or with a double-sided adhesive, in the form
of
interlocking or frictionally acting means, such as suitable profiled shapes,
or by
means of welding, such as thermal welding, for example, or ultrasonic welding,
or the like. Positioning of the sealing elements on the connecting element by
means of an adhesive layer or welding is preferred. For one-piece joint-
sealing
tapes, the positioning is predetermined by manufacturing factors.
In turn, the carrier for the sealing strips may have means for fastening to a
building part, such as a drywall profile, for example in the form of a self-
adhesive
layer, in the form of interlocking or frictionally acting means, such as
suitable
profiled shapes or the like.
The dimensions both of the sealing strips and of the carrier are chosen to
correspond to the planned use of the joint-sealing tape.
In one embodiment of the inventive joint-sealing tape, the sealing strips are
firmly joined to the carrier at least over part of their circumference. Hereby
a firm
joint is created between the carrier and the sealing strips, so that, even
under
severe stress and strain of the fastening region and partial detachment of the
sealing strips from the carrier, complete detachment of the sealing strips
from
the carrier is prevented.
In a further preferred embodiment of the inventive joint sealing tape, the
sealing
strips are firmly joined to the carrier over their entire circumference. On
the one
hand, optimum and durable fastening of the sealing strips to the carrier is
CA 02971960 2017-06-22
v
- 6 -
achieved hereby, thus making detachment of the sealing strips from the carrier
almost impossible. On the other hand, if the carrier material is smokeproof,
an
open-celled foam material may be used for the sealing strips.
The region of the carrier disposed between the two sealing strips, or more
accurately said between the two points of attachment of the carrier to the
sealing
strips, defines a support region. This support region comes into contact with
a
building part during application of the joint-sealing tape. The width of the
support
region is chosen such that it corresponds at least to the width of the face of
a
building part on which the joint-sealing tape is applied. Hereby it is
achieved that,
when the joint-sealing tape is pushed onto a building part with channel-shaped
outer profile, such as a channel profile of a drywall studwork, for example,
the
sealing strips extend beyond the channel profile with an exactly defined
projecting length. When one building part is disposed on a connecting building
part, this projecting length is squeezed together due to the compressible
sealing
strips and thereby closes any irregularities that may be present. Furthermore,
a
torque is generated in the sealing strips and presses them in the direction of
the
building part on which the joint-sealing tape was applied, so that it also
presses
sealingly on that building part.
The inventive joint-sealing tape is particularly suitable for safely sealing a
building-structure joint between two adjacent building parts in simple manner,
especially against sound and/or smoke and if necessary also against fire. To
ensure that the joint-sealing tape can fulfill its function, the regions with
which
the two building parts are adjacent to one another must be of different
widths.
Accordingly, a further subject matter of the invention is a sealing
arrangement for
sealing a joint between two juxtaposed building parts, with at least one first
building part, one second building part and the joint-sealing tape described
in the
foregoing, wherein the side with which the second building part bears on the
first
building part has a face (F2) with a width (B2) and the first building part
has a
face (F1) with a width (B1), on which the second building part bears, with the
condition that the width (B2) is smaller than the width (B1). The sealing
arrangement is characterized in that the sealing strips are positioned in the
outer
region of the joint and are configured to seal the joint from outside. In this
connection, "positioned in the outer region of the joint" means that these
sealing
strips are disposed on the second building part, especially laterally.
CA 02971960 2017-06-22
. .
- 7 -
The region of the carrier disposed between the two sealing strips, or more
accurately said between the two points of attachment of the carrier to the
sealing
strips, defines a support region. This support region comes into contact with
a
building part during application of the joint-sealing tape. The width of the
support
region is chosen such that it corresponds at least to the width of the face of
a
building part on which the joint-sealing tape is applied. Hereby it is
achieved that,
when the joint-sealing tape is pushed onto a building part with channel-shaped
outer profile, such as a channel profile of a drywall studwork, for example,
the
sealing strips become upright and extend beyond the channel profile with an
exactly defined projecting length. When one building part is disposed on a
connecting building part, this projecting length is squeezed together due to
the
compressible sealing strips and thereby closes any irregularities that may be
present. Furthermore, a torque is generated in the sealing strips and presses
them in the direction of the building part on which the joint-sealing tape was
applied, so that it also presses sealingly on that building part.
So that sealing relative to the first building part can be guaranteed solely
by
disposing the second building part on the first building part and thus
applying
pressure to the sealing strips, the following condition must be fulfilled: for
predetermined radius (r) of the sealing strips, the width (b) of the support
region
is chosen as a function of the width (B2) (where B2 = p) of the second
building
part in such a way that the width (b) of the support region corresponds to at
least
the width (B2) (where B2 = p) of the face (F2) of the second building part,
but the
value of the perpendicular from the plane of the face (F2) of the second
building
part to the center of the sealing strip does not correspond exactly to the
value of
the radius (r) of the sealing strips. An intermediate value, depending on how
large the projecting length is supposed to be, is ideal for the projecting
length
(h).
The size of the projecting length (h) or the dimensioning of the joint-sealing
tape
may then be calculated simply on the basis of the following formula, where b
is
chosen in such a way that h assumes a positive value:
j
b
Projecting length h = r - r(b - p) + (---1-32
2¨ )
According to the invention, the joint-sealing tape may be used on all kinds of
connecting joints where one building part encounters another building part,
provided the faces with which the building parts abut one another are of
different
CA 02971960 2017-06-22
- 8 -
sizes. Accordingly, the joint-sealing tape may be used on all profiles, even
closed profiles or wooden beams, which must be sealed to a connecting face.
In a particularly preferred embodiment of the sealing arrangement, the first
building part is a wall, a ceiling or a floor of a building structure and the
second
building part is a frame profile of a drywall studwork, for example a channel
profile.
The invention will be described in more detail hereinafter on the basis of the
application of the joint-sealing tape on a channel profile of a drywall
studwork,
without hereby restricting the scope of protection. The person skilled in the
art is
aware that application to any correspondingly styled building-structure joints
is
possible without any or without large adaptations of the joint-sealing tape.
A connecting joint, above all in dry construction, can be sealed particularly
effectively when at least two further building parts are provided that are
disposed
laterally on a second building part. In this case, one further building part
is
disposed on one side and the second further building part is disposed on the
opposite side of the second building part, each being spaced apart from the
first
building part. Thereby a joint bounded by the three building parts is formed.
A particularly preferred use of the joint-sealing tape therefore relates to
the
sealing of profiles in dry construction, wherein the first building part is a
floor, a
ceiling or a wall of a building element, for example a masonry structure or
concrete building element, and the second building part is a ceiling, floor or
wall
profile or a metal or wood studwork of a dry construction element. The profile
may be any of the profiles commonly used for dry construction, regardless of
whether it has a slotted or non-slotted web or slotted or non-slotted flange.
The
further building parts are gypsum boards, which bear closely on the profiles
and
are fastened to the studwork. In order to permit vertical movement of the
gypsum
boards, for example in the event of an earthquake, the gypsum boards are
mounted to be vertically movable at a spacing from a wall, a floor or a
ceiling.
Thereby a space (also referred to as joint herein) is formed between the
gypsum
board and the wall, the floor or the ceiling. This joint is filled by the
sealing strips
of the joint-sealing tape, so that the sealing strip seals the joint against
sound
CA 02971960 2017-06-22
- 9 -
and/or smoke and, depending on material of the sealing strip, also against
fire if
necessary.
As already described, the joint-sealing tape has an elongated carrier and at
least
two separate sealing strips of predetermined width, which have a round cross
section and are disposed on one side of the carrier, spaced apart, side-by-
side
and running in the longitudinal direction of the carrier.
In general, the radius of the sealing strips will be chosen as a function of
the
profiles being used and of the material being used. The radius must be chosen
such that the sealing strip fills the gap between the gypsum board and the
ceiling
and bears sealingly both on the ceiling and on the gypsum board. If a vertical
movement of the gypsum boards is to be permitted, the sealing strip must
follow
the movement of the gypsum board, so that the contact with the gypsum board
is not torn apart and no gaps are able to form between sealing strip and
gypsum
board. For this purpose, the sealing strip preferably consists of resilient
and
compressible material and is appropriately precompressed during mounting of
the gypsum board, so that a downward movement of the gypsum board,
whereby the gap between this and the ceiling becomes larger, can be followed.
In this way, the preadjusted freedom of movement of the gypsum board
determines the radius of the sealing strip.
As an example, the material of the sealing element may be chosen in such a
way that its hardness or compressibility is adjusted such that the sealing
strip is
compressed to a well-defined height merely by the dead weight of the gypsum
board in the floor region. In this way a correct spacing between floor and
gypsum
board can be adjusted without further measurement. This is necessary in
particular whenever damage to the gypsum board by rising dampness must be
prevented.
The region of the carrier disposed between the two sealing strips, or more
accurately said between the two points of attachment of the carrier to the
sealing
strips, defines a support region, which consists only of the carrier. This
support
region is dimensioned such that it corresponds at least to the width of the
web of
the channel profile. Hereby the installation and especially the positioning of
the
joint-sealing tape on the web of the channel profile is facilitated.
CA 02971960 2017-06-22
-
A better hold of the sealing strips on the flanges of the channel profile, and
better, especially tighter pressing of the sealing strips on the ceiling, is
achieved
by making the width of the support region larger than the width of the web of
the
channel profile. However, to ensure that the sealing strips, after
installation of
the joint-sealing tape, reliably seal the joint left during mounting of the
gypsum
boards and are able to even out any irregularities that may be present in the
ceiling, the sealing strips must extend beyond the web of the channel profile
on
both sides after the joint-sealing tape has been disposed on the profile.
Now, during fastening of the channel profile to the ceiling, the projecting
length
presses firmly against it, whereby irregularities in the ceiling can be evened
out.
Furthermore, it is achieved by the projecting length that the sealing strips
are
pressed downward in the direction of the side cheeks of the profile during
fastening of the profile, and are applied sealingly on it. On the one hand,
therefore, neat centering of the joint-sealing tape on the profile is
achieved, and
additional fastening of the joint-sealing tape on the profile, especially on
the side
cheeks of the profile, in order to prevent the joint-sealing tape from
detaching or
pivoting upward during mounting of the gypsum boards, is unnecessary.
To create a sealing arrangement as described in detail hereinabove, the joint-
sealing tape, before the second building part is attached to the first
building part,
is positioned on the face (F2) of the second building part and together
therewith
is disposed on the first building part, especially abuttingly.
To seal a connecting joint in dry construction, the joint-sealing tape, prior
to
attachment of the profile to the connecting building parts, such as a ceiling,
for
example, is positioned on a channel profile and then fastened together
therewith,
for example on the ceiling. In a further operation, the gypsum boards, whether
they have one or two layers, are pressed at the end face against the sealing
element, and thereby sealing of the joint is achieved.
Without restricting the scope of protection of the invention, the invention
will be
described in more detail on the basis of a special embodiment of the joint-
sealing tape. In this embodiment, the joint-sealing tape is applied to the
connecting joints in drywalls. For simplicity, the application to the
connecting
CA 02971960 2017-06-22
- 11 -
joint between a ceiling profile, a gypsum board and a ceiling will be
described.
This ceiling profile is a standard channel profile with a web as well as two
flanges. It is clear to the person skilled in the art that the sealing tape
may also
be applied to connecting joints of other types, regardless of the shape of the
sealing strips, if they correspond in terms of their geometry to the
connecting
joint described here.
Further advantages and features will become obvious from the description
hereinafter in conjunction with the attached drawings, wherein:
- Fig. 1 shows a perspective view of a joint-sealing tape according to one
embodiment of the present invention;
Fig. 2a shows a sketched front view and Fig. 2b a sectional view through
a joint-sealing tape according to one embodiment of the present
invention;
Fig. 3 shows a detail of a sketched front view of the joint-sealing tape
from Figs. 2a and 2b;
- Figs. 4a and 4b show a sketched front view through a building element
with a joint-sealing tape according to one embodiment of an inventive
sealing arrangement (Fig. 4b) and of a comparison form (Fig. 4a);
- Fig. 5 shows the stepwise procedure for establishing a sealing
arrangement according to Fig. 4b; and
- Fig. 6 shows a sketched front view through a finished building element
with the embodiment of an inventive sealing arrangement shown in Fig.
4b.
One embodiment of an inventive joint-sealing tape 1 is shown in Figs. 1, 2a
and
2b. Joint-sealing tape 1 has two sealing strips 3, 3', which are disposed on
the
outer rims of carrier 2. Sealing strips 3, 3' have a round cross section and
are
completely surrounded, i.e. over their entire circumference, by carrier 2
(Fig. 2b).
As an example, sealing strips 3, 3' consist of a compressible foam and carrier
2
CA 02971960 2017-06-22
,
- 12 -
of a plastic film. The distance b between the two sealing strips corresponds
to
the distance between the points of attachment A and B of carrier 2 to sealing
strips 3, 3'. The region of carrier 2 defined by the region between points A
and B
corresponds to the support region with width b. This width b corresponds at
least
to the width of web 11 of channel profile 10 (see Fig. 4a and 4b).
Fig. 3 shows a portion of joint-sealing tape 1 shown in Fig. 2a, from which
the
data for calculation of the size of the projecting length h can be seen. In
this
figure, web 11 and flange 12 of channel profile 10 are indicated by broken
lines.
According to this, width b of the support region is chosen in such a way as
for
predetermined radius r of sealing strip 3 that projecting length h always
assumes
a positive value but corresponds at most to the width of web 11. In order to
facilitate the use of joint-sealing tape 1 and to achieve the best possible
support
on web 11, width b of the support region is chosen to be larger than the web
width.
As already stated, projecting length h can be calculated with predetermined
radius r of sealing strip 3 and predetermined web width on the basis of the
following formula: jr(b - p) + (b ; P)2
Projecting length h = r - = 1" - X
where x is the value of the perpendicular from the plane of web 11 to the
center
of sealing strip 3 (see Fig. 3). No projecting length exists (h = 0) if radius
r of
sealing strip 3 corresponds to the value of perpendicular x (r = x), as shown
in
Fig. 2a. In this case the sealing strip is not pressed against the ceiling
during
mounting of channel profile 10. Sealing is achieved only when the gypsum board
is mounted and abuts on sealing strip 3 from underneath, thus compressing it.
Projecting length h corresponds to radius r (h = r) when the support width
corresponds to width b of web 11, as shown in Fig. 4b.
When joint-sealing tape 1 with the support region is applied on the channel
profile of a drywall studwork (not illustrated in the figure), for example,
more
accurately said when it is laid on web 11 of channel profile 10, and width b
of the
support region is larger than the width of web 11 of channel profile 10,
points A
and B slip downward along the edges of web 11. As shown in Fig. 4a, the
CA 02971960 2017-06-22
- 13 -
support region has been chosen to be too wide, and so sealing strips 3, 3' no
longer exert pressure on ceiling 20 during mounting of channel profile 10 on
ceiling 20. Fig. 4b shows the other extreme, in which the width of the support
region corresponds to the width of web 11. Consequently, the projecting length
achieved is too large, which makes mounting of channel profile 10 on the
ceiling
difficult and may lead to tearing of carrier 2, since the tension on this is
very
high. The optimum width b of the support region is therefore intermediate,
since
hereby a projecting length h is obtained that is not too large to hinder
mounting
of channel profile 10 on the ceiling or to cause excessive tension in carrier
2,
possibly sufficient to damage it, during mounting.
Projecting length h ensures that sealing strips 3, 3' are pressed firmly on
ceiling
and thus they are able to even out any irregularities that may be present in
ceiling 20 and to seal the gap between channel profile 10 and ceiling 20 from
the
outside. In this way it is achieved that joint-sealing tape 1 is already
applied
sealingly on ceiling 20 and channel profile 10 during mounting of channel
profile
10.
The use of joint-sealing tape 1 for sealing the gap between a ceiling 20,
channel
profile 10 of a drywall studwork and gypsum board 30 is sketched stepwise in
Fig. 5. Firstly, in the first step I, joint-sealing tape 1 is laid on the web
of channel
profile 10 and, in the second step II, is fastened together therewith on
ceiling 20
in standard manner, e.g. by screws or nails. Then, in a last step III, gypsum
boards 30 are applied on the flange of channel profile 10 and pushed upward in
the direction of ceiling 20, whereupon a gap remains between the top edge of
gypsum board 30 and ceiling 20, which is filled with sealing strips 3, 3' of
joint-
sealing tape 1, in order to permit vertical movement, for example, of gypsum
board 30. Thereby sealing strips 3 are compressed and thus seal the gap
between the ceiling and channel profile 10 and the gap between ceiling 20 and
gypsum board 30. The finished structure is shown in Fig. 6.
As is obvious from this, application is very mounting-friendly, since no
additional
fastening of the joint-sealing tape, for example to the profile or to the
ceiling, is
necessary. Accurately fitting application of the joint-sealing tape, for
example
against a profile, is also unnecessary, by virtue of the self-centering of the
joint-
sealing tape during mounting of the profile on a building part. Mounting is
CA 02971960 2017-06-22
- 14 -
therefore conceivably easy, and the working effort for mounting the joint-
sealing
tape is greatly reduced.
Regardless of the pressure exerted by the gypsum board, well-defined pressing
of the sealing strips against the underlying surface is achieved by the
inventive
configuration of the joint-sealing tape. Via the choice of the material from
which
the sealing strips are made, a well-defined spacing can be easily adjusted
between a gypsum board and the underlying surface on which the profile is
mounted. Furthermore, when used in an expansion joint, the sealing strips
hinder movement much less than compared with the known sealing solutions, so
that it is possible to work with only a relatively small joint width in order
to
achieve adequate absorption of movement.
The invention therefore achieves safe and reliable sealing of joints between
two
building parts, especially between a profile of a drywall studwork and a
building
part adjacent thereto, such as, for example, a ceiling, wall or floor. In this
connection, two-sided sealing can be achieved in only one operation, by
providing a prefabricated sealing element.
