EP0011781B1 - Process for manufacturing insulated plastered façades and insulating building panels for carrying out the process - Google Patents

Process for manufacturing insulated plastered façades and insulating building panels for carrying out the process Download PDF

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Publication number
EP0011781B1
EP0011781B1 EP79104520A EP79104520A EP0011781B1 EP 0011781 B1 EP0011781 B1 EP 0011781B1 EP 79104520 A EP79104520 A EP 79104520A EP 79104520 A EP79104520 A EP 79104520A EP 0011781 B1 EP0011781 B1 EP 0011781B1
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Prior art keywords
slab
plaster
slabs
glass fibre
fibre fabric
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EP79104520A
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German (de)
French (fr)
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EP0011781A1 (en
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Friedrich Heck
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Priority claimed from DE19782850861 external-priority patent/DE2850861A1/en
Priority claimed from DE19787837566 external-priority patent/DE7837566U1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
    • E04F13/04—Bases for plaster
    • E04F13/047—Plaster carrying meshes
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F13/00—Coverings or linings, e.g. for walls or ceilings
    • E04F13/02—Coverings or linings, e.g. for walls or ceilings of plastic materials hardening after applying, e.g. plaster
    • E04F13/04—Bases for plaster

Definitions

  • Insulated plaster facades are obtained by placing glass fiber fabric on polystyrene rigid foam panels and applying the plaster to them.
  • plastic In order to impart sufficient adhesive strength to the plaster, relatively high proportions of plastic are added.
  • These plastic parts are, however, of considerable disadvantage because they block the water vapor passage to a great extent.
  • condensing water In the border area between the rigid foam board and the plaster, condensing water inevitably penetrating through moist air cannot diffuse through the plaster because of the barrier effect of the plastic and pushes the plaster off the board when exposed to frost, which leads to damage to the facade.
  • DE-A-2516916 discloses a process for producing insulated plaster facades by applying glass fiber fabric and plaster to the grooved surface of rigid polystyrene foam boards, which have a defined post-shrinkage of at least 1 mm / m, according to which it has been successfully achieved for the first time Reduce the plastic content of the mortar to such an extent that the water vapor barrier effect was tolerable. Plastic parts were nevertheless also necessary there, since a certain adhesive effect was indispensable for the initial fixing of the moist, un-set mortar.
  • an insulating plaster base plate with reinforcement from a glass silk grid mat is known, the individual thread strands of which are impregnated and coated with a high-strength binder made of synthetic resins and partially and in scatter, i.e. bond with the rigid foam panel only at certain points.
  • a plastic dispersion mortar is provided as the fastening means.
  • DE-B-1 658 875 discloses the use of mortar or adhesives as fasteners for glass fibers or glass silk threads on rigid foam panels.
  • an insulating outer wall cladding made of rigid foam panels and a plaster layer arranged thereon which contains a reinforcement grid which is fastened to the rigid foam panels with clamps.
  • the rigid foam panels also have dovetail-shaped grooves that go into the material of the plaster layer.
  • the invention has for its object to improve a method for producing insulated plaster facades according to the preamble of the claim in such a way that the plastic content of the mortar is reduced even further, or the use of mortars is possible that no longer have any plastic components, and thus the vapor barrier values to reduce, and to specify insulation boards that reduce the workload for the production of the facades.
  • This object is achieved according to the invention in that tape-foamed polystyrene rigid foam sheets with a compressed surface are used and in that the glass fiber fabric is first attached to the sheet surface at a distance of preferably 1 to 2 mm from the sheet surface, with the aid of fastening means distributed over the sheet, after which a Plaster with a plastic content of 0 to 1% is applied to the prepared plate. In this way it is possible for the first time to produce quickly insulated facades that have optimal water vapor transmission values.
  • the plastic parts are localized in very small zones, so that it is possible to keep the essential main component of the plaster largely free of plastic.
  • the fastening means is preferably a known adhesive mortar of the following composition: cement 10 to 80, preferably 40 to 60 percent by weight sand, quartz sand or other mineral fillers 0 to 80, preferably 30 to 50 percent by weight and plastic 2 to 50, preferably 10 to 20 percent by weight.
  • a preferred embodiment is that the panels are provided with the glass fiber fabric before being attached to the wall to be insulated. This has the essential advantage that the plates can be prepared in the factory.
  • the joints of the fabric can coincide with the abutting edges of the hardboard without cracking, so that rigid foam panels can be produced in the factory with glass fiber mats that are congruent or only slightly protrude beyond the edges. These panels can be easily attached to the wall, since no large overlaps of the fabric are necessary or because they can be dispensed with entirely.
  • the glass fiber fabric is preferably fastened to the plates in the edge region of the plates with the aid of the fastening means.
  • the fiberglass webs can be attached to the rigid foam panels on site.
  • Either the individual panels can be reinforced in the manner described above, or larger sheets can be attached to the insulation layer already on the masonry.
  • the glass fiber fabric is then preferably fastened to the plates with the aid of dowel-like fastening elements made of non-corroding metal or plastic, which can be inserted into the hard foam boards to fix.
  • a plastering mortar consisting of cement and sand, optionally with the addition of lime, is preferably applied to the glass fiber fabric, which, in a known manner as plastic, comprises methylcellulose, acrylates, methacrylates and their copolymers, e.g. Styrene acrylates, further preferably vinyl acetates and their copolymers added.
  • plastic comprises methylcellulose, acrylates, methacrylates and their copolymers, e.g. Styrene acrylates, further preferably vinyl acetates and their copolymers added.
  • the plastic dispersion paints become more dirty due to increased electrostatic charge; become brittle over time due to decomposition due to UV radiation and can be pushed off the surface due to their increased water vapor diffusion resistance. In addition, they soften when exposed to direct sunlight, which can lead to the formation of vapor bubbles, which disappear as a result of cooling at night until the structure becomes porous and cracked.
  • the water vapor diffusion resistance factors of the paints used are:
  • the plastic-modified cement mortar is applied and smoothed by hand or using a mortar spraying machine.
  • This coating can be appropriately colored, left in this condition or coated with a conventional plaster or painted.
  • the grooves 4 are undercut like a dovetail.
  • the fastening means 2 on which the glass fiber fabric 3 is attached (glued)
  • the grooves 4 are undercut like a dovetail.
  • the best bond between the grooved board 1 and the set plaster is obtained when rigid foam boards 1 with the greatest possible post-shrinkage are used, i.e. when boards 1 are used that have been freshly produced and at least according to conventional teaching due to the high blowing agent or solvent content Should be stored for 3 months. It has also proven to be advantageous not to form the necessary grooves in the plates, but to subsequently mill them in.
  • the method is expediently carried out in such a way that unbound plastic-rich stamps with effective adhesive surfaces in the order of magnitude between 20 and 2000 mm 2 are applied to the rigid foam panels 1 and the glass fiber fabric 3 is then immediately placed thereon.
  • the mortar of the stamp is allowed to set and then the actual plaster is applied:
  • the plaster applied which is low in plastic and therefore does not have an adhesive effect, is sufficiently held in place by the glass fiber fabric, whereby it must be emphasized that the plaster is applied here vertically, as in the prior art Arranged on the panels attached to the wall to be insulated. It is also possible to allow the fabric to protrude beyond the edges in order to increase the initial adhesion of the wet reinforcement coating in the edge area. However, this has no influence on the quality of the finished insulation layer.
  • the foamed sheets 1 with a compacted surface are to be produced without mold release agents. With insulation boards with mold release agents on the surface, the adhesion of a low-plastic mortar can be reduced.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Finishing Walls (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Description

Gedämmte Putzfassaden werden dadurch erhalten, dass man auf Polystyrol-Hartschaumplatten Glasfasergewebe auflegt und auf diese den Putz aufträgt. Um dem Putz eine genügende Haftfestigkeit zu vermitteln, werden diesem relativ hohe Kunststoffanteile beigemischt. Diese Kunststoffanteile sind aber von erheblichem Nachteil, da sie den Wasserdampfdurchlass stark sperren. In den Grenzbereich zwischen Hartschaumplatte und Putz unvermeidbar durch feuchte Luft eindringendes kondensierendes Wasser kann somitwegen der Sperrwirkung des Kunststoffes nicht durch den Putz diffundieren und drückt den Putz bei Frosteinwirkung von der Platte ab, was zu Schäden an der Fassade führt.Insulated plaster facades are obtained by placing glass fiber fabric on polystyrene rigid foam panels and applying the plaster to them. In order to impart sufficient adhesive strength to the plaster, relatively high proportions of plastic are added. These plastic parts are, however, of considerable disadvantage because they block the water vapor passage to a great extent. In the border area between the rigid foam board and the plaster, condensing water inevitably penetrating through moist air cannot diffuse through the plaster because of the barrier effect of the plastic and pushes the plaster off the board when exposed to frost, which leads to damage to the facade.

Versuche, den Kunststoffanteil zu senken, gelangen z. B. durch Verwendung von Polybutadienstyrol, wobei Anteile von lediglich 2,5 Gewichtsprozent Kunststoff im Mörtel erreicht wurden. Da jedoch dieser Kunststoff dem Mörtel einen erheblich höheren Wasserdampfsperrwert vermittelt als herkömmliche Kunststoffe, hat dessen Verwendung nicht zu befriedigenden Ergebnissen geführt.Attempts to reduce the plastic content, z. B. by using polybutadiene styrene, proportions of only 2.5 percent by weight of plastic were achieved in the mortar. However, since this plastic gives the mortar a significantly higher water vapor barrier value than conventional plastics, its use has not led to satisfactory results.

Man hatdaher einen Haftputz. mit relativ hohen Kunststoffanteilen verwendet und versucht, die Spannungen zwischen Mörtel und der durch Treibmittel- bzw. Lösungsmittelverlust stark schwindenden Schaumplatte dadurch zu mindern, dass durch vorgeschriebene Mindestlagerzeiten die Nachschwindung bis zu einem gewissen Grade abgebaut wurde. Es liegt jedoch auf der Hand, dassdiese Lösung letztlich nicht befriedigt, da die Differenzspannung zwischen Putz und Mörtel nach der Verarbeitung ständig zunimmt und so den Verbund, der, siehe oben, durch den hohen Wasserdampfsperrwert ohnehin recht empfindlich ist, durch zusätzliche Kräfte obendrein belastet.You therefore have an adhesive plaster. used with relatively high proportions of plastic and tries to reduce the tension between the mortar and the foam plate, which strongly shrinks due to the loss of blowing agent or solvent, by reducing the post-shrinkage to a certain extent through the prescribed minimum storage times. However, it is obvious that this solution is ultimately unsatisfactory, since the differential tension between plaster and mortar increases continuously after processing and, as a result, the bond, which, as above, is quite sensitive due to the high water vapor barrier value, is additionally burdened by additional forces.

Aus der DE-A-2516916 ist ein Verfahren zur Herstellung gedämmter Putzfassaden durch Aufbringen von Glasfasergewebe und Putz auf die gerillte Oberfläche von Polystyrolhartschaumplatten, wobei diese eine definierte Nachschwindung von mindestens 1 mm/m aufweisen, bekannt, gemäss dem es erstmals gelungen ist, den Kunststoffanteil des Mörtels soweit herabzusetzen, dass die Wasserdampfsperrwirkung tolerierbar wurde. Kunststoffanteile waren gleichwohl auch dort nötig, da eine gewisse Haftwirkung zur anfänglichen Befestigung des feuchten unabgebundenen Mörtels unabdingbar war.DE-A-2516916 discloses a process for producing insulated plaster facades by applying glass fiber fabric and plaster to the grooved surface of rigid polystyrene foam boards, which have a defined post-shrinkage of at least 1 mm / m, according to which it has been successfully achieved for the first time Reduce the plastic content of the mortar to such an extent that the water vapor barrier effect was tolerable. Plastic parts were nevertheless also necessary there, since a certain adhesive effect was indispensable for the initial fixing of the moist, un-set mortar.

Aus der DE-A-2713487 ist eine Isolier-Putzträgerplatte mit Bewehrung aus einer Glasseiden-Gittermatte bekannt, deren einzelne Fadenstränge von einer hochfesten Bindemasse aus Kunstharzen durchtränkt und ummantelt sind und teilweise und in Streuung, d.h. nur an bestimmten Punkten, mit der Hartschaumplatte Verbund haben. Als Befestigungsmittel ist ein Kunststoffdispersionsmörtel vorgesehen.From DE-A-2713487 an insulating plaster base plate with reinforcement from a glass silk grid mat is known, the individual thread strands of which are impregnated and coated with a high-strength binder made of synthetic resins and partially and in scatter, i.e. bond with the rigid foam panel only at certain points. A plastic dispersion mortar is provided as the fastening means.

Aus der DE-B-1 658 875 ist die Verwendung von Mörtel oder Klebern als Befestigungsmittel für Glasfasern bzw. Glasseidenfäden an Hartschaumplatten bekannt.DE-B-1 658 875 discloses the use of mortar or adhesives as fasteners for glass fibers or glass silk threads on rigid foam panels.

Aus der DE-A-1 942 352 ist eine Hartschaumplatte mit ein- oder beidseitiger Abdeckung aus Streckblech mit parallelen schwalbenschwanzförmigen Aussparungen zur Aufnahme von Hohlstegen oder Sichen bekannt.From DE-A-1 942 352 a rigid foam plate with a cover on one or both sides made of expanded metal with parallel dovetail-shaped recesses for receiving hollow webs or siches is known.

Aus der FR-A-2 378143 ist eine isolierende Aussenwandverkleidung aus Hartschaumplatten und einer darauf angeordneten Putzschicht, die ein Bewehrungsgitter enthält, das mit Klammern an den Hartschaumplatten befestigt ist, bekannt. Die Hartschaumplatten weisen auch schwalbenschwanzförmige Nuten auf, in das Material der Putzschicht eingeht.From FR-A-2 378143 an insulating outer wall cladding made of rigid foam panels and a plaster layer arranged thereon is known, which contains a reinforcement grid which is fastened to the rigid foam panels with clamps. The rigid foam panels also have dovetail-shaped grooves that go into the material of the plaster layer.

Der Erfindung liegt die Aufgabe zugrunde, ein Verfahren zur Herstellung gedämmter Putzfassaden gemäss dem Oberbegriff des Anspruchs dahingehend zu verbessern, dass der Kunststoffanteil des Mörtels noch weiter gesenkt, bzw. die Verwendung von Mörteln möglich ist, die keinerlei Kunststoffanteile mehr aufweisen, und damit die Dampfsperrwerte zu verringern, sowie Dämmplatten anzugeben, die den Arbeitsaufwand zur Herstellung der Fassaden verringern.The invention has for its object to improve a method for producing insulated plaster facades according to the preamble of the claim in such a way that the plastic content of the mortar is reduced even further, or the use of mortars is possible that no longer have any plastic components, and thus the vapor barrier values to reduce, and to specify insulation boards that reduce the workload for the production of the facades.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass bandgeschäumte Polystyrol-Hartschaumplatten mit verdichteter Oberfläche verwendet werden und dass zunächst mit Hilfe von über die Platte verteilten Befestigungsmitteln das Glasfasergewebe in einem Abstand von vorzugsweise 1 bis 2 mm von der Plattenoberfläche an dieser befestigt wird, wonach dann ein Putz mit einem Kunststoffanteil von 0 bis 1 % auf die derart vorbereitete Platte aufgetragen wird. Auf diese Weise ist es erstmals möglich, schnell gedämmte Fassaden herzustellen, die optimale Wasserdampfdurchgangswerte aufweisen.This object is achieved according to the invention in that tape-foamed polystyrene rigid foam sheets with a compressed surface are used and in that the glass fiber fabric is first attached to the sheet surface at a distance of preferably 1 to 2 mm from the sheet surface, with the aid of fastening means distributed over the sheet, after which a Plaster with a plastic content of 0 to 1% is applied to the prepared plate. In this way it is possible for the first time to produce quickly insulated facades that have optimal water vapor transmission values.

Da das Glasfasergewebe mit Hilfe von punktförmig über die Platte verteilten Befestigungsmitteln beabstandet auf die Platte geklebt ist, sind die Kunststoffanteile örtlich begrenzt in sehr kleinen Zonen zusammengefasst, damit ist es möglich, den wesentlichen Hauptbestandteil des Putzes von Kunststoff weitgehend freizuhalten.Since the glass fiber fabric is glued to the plate with the aid of fastening means distributed in a punctiform manner over the plate, the plastic parts are localized in very small zones, so that it is possible to keep the essential main component of the plaster largely free of plastic.

Das Befestigungsmittel ist vorzugsweise ein an sich bekannter Klebemörtel der folgenden Zusammensetzung: Zement 10 bis 80, vorzugsweise 40. bis 60 Gewichtsprozent Sand, Quarzsand oder andere mineralische Füllstoffe 0 bis 80, vorzugsweise 30 bis 50 Gewichtsprozent und an Kunststoff 2 bis 50, vorzugsweise 10 bis 20 Gewichtsprozent.The fastening means is preferably a known adhesive mortar of the following composition: cement 10 to 80, preferably 40 to 60 percent by weight sand, quartz sand or other mineral fillers 0 to 80, preferably 30 to 50 percent by weight and plastic 2 to 50, preferably 10 to 20 percent by weight.

Eine vorzugsweise Ausführung besteht darin, dass die Platten vor dem Anbringen an die zu dämmende Wand mit dem Glasfasergewebe versehen werden. Dies hat den ganz wesentlichen Vorteil, dass die Platten werkseitig vorbereitet werden können.A preferred embodiment is that the panels are provided with the glass fiber fabric before being attached to the wall to be insulated. This has the essential advantage that the plates can be prepared in the factory.

Diesywar beim Stande der Technik nicht möglich, da das Gewebe zwingend so an auf dem Mauerwerk angebrachten Platten befestigt werden musste, dass das Glasfasergewebe nicht an den Rändern der Platten Stösse bildete, da dies unweigerlich an den Stosskanten nach kurzer Zeit zu Rissbildung führte. Nach dem erfindungsgemässen Verfahren können die Stösse des Gewebes mit den Stosskanten der Hartfaserplatten zusammenfallen, ohne dass eine Rissbildung entsteht, so dass Hartschaumplatten werkseitig mit deckungsgleichen oder nur geringfügig über die Ränder überstehenden Glasfasergewebematten hergestellt werden können. Diese Platten können mühelos an der Mauer befestigt werden, da keine grossen Überlappungen des Gewebes nötig sind bzw. da auf diese auch ganz verzichtet werden kann.This was not possible in the prior art, since the fabric had to be attached to panels attached to the masonry in such a way that the glass fiber fabric did not form joints on the edges of the panels, since this inevitably led to the formation of cracks on the abutting edges after a short time. According to the method according to the invention, the joints of the fabric can coincide with the abutting edges of the hardboard without cracking, so that rigid foam panels can be produced in the factory with glass fiber mats that are congruent or only slightly protrude beyond the edges. These panels can be easily attached to the wall, since no large overlaps of the fabric are necessary or because they can be dispensed with entirely.

Um zu vermeiden, dass beim Auftragen des Putzes an den Plattenstössen dieser im nassen Zustand nicht ausreichend gehalten wird, wird das Glasfasergewebe vorzugsweise im Randbereich der Platten mit Hilfe der Befestigungsmittel an den Platten befestigt.In order to avoid that when the plaster is applied to the plate joints, it is not adequately held in the wet state, the glass fiber fabric is preferably fastened to the plates in the edge region of the plates with the aid of the fastening means.

Es ist natürlich auch möglich, die Glasfasergewebebahnen auf der Baustelle an den Hartschaumplatten anzubringen. Dabei können entweder die einzelnen Platten in oben geschilderter Weise armiert werden, oder aber grössere Bahnen auf der bereits auf dem Mauerwerk befindlichen Dämmschicht befestigt werden. Vorzugsweise wird dann das Glasfasergewebe mit Hilfe von in die Hartschaumplatten- einsteckbaren dübelartig verspreizenden Befestigungselementen aus nichtkorrodierendem Metall oder Kunststoff an den Platten befestigt Es genügt dabei, diese «Schikanen» aufweisenden Elemente in den Polystyrol-Hartschaum zu drücken und an kopfseitigen Haken oder dergleichen das Glasfasergewebe zu befestigen.Of course, it is also possible to attach the fiberglass webs to the rigid foam panels on site. Either the individual panels can be reinforced in the manner described above, or larger sheets can be attached to the insulation layer already on the masonry. The glass fiber fabric is then preferably fastened to the plates with the aid of dowel-like fastening elements made of non-corroding metal or plastic, which can be inserted into the hard foam boards to fix.

Vorzugsweise wird auf das Glasfasergewebe ein Putzmörtel, bestehend aus Zement und Sand, gegebenenfalls unter Zusatz von Kalk aufgebracht, dem in bekannter Weise als Kunststoff Methylcellulose, Acrylate, Methacrylate und deren Copolymere, z.B. Styrolacrylate, ferner vorzugsweise Vinylacetate und deren Copolymerisate zugegeben. Durch die Verwendung von äusserst geringen Kunststoffzusatzmengen zu Zement-Mörtel-Mischungen wird auf den Polystyrol-Hartschaumplatten eine Beschichtung erreicht, die nach dem Abbinden eine einwandfreie Grundlage darstelltfür rein mineralisch aufgebaute Aussenputze oder Farbanstriche. Die Haftung ist durch Saugfähigkeit der Armierungsbeschichtung sowie Artverwandtheit beider Beschichtungsmassen sehr gut.A plastering mortar consisting of cement and sand, optionally with the addition of lime, is preferably applied to the glass fiber fabric, which, in a known manner as plastic, comprises methylcellulose, acrylates, methacrylates and their copolymers, e.g. Styrene acrylates, further preferably vinyl acetates and their copolymers added. Through the use of extremely small amounts of plastic added to cement-mortar mixtures, a coating is achieved on the polystyrene rigid foam panels, which after setting provides a perfect basis for purely mineral-based exterior plasters or paints. The adhesion is very good due to the absorbency of the reinforcement coating and the similarity of the two coating compositions.

Der Wärmeausdehnungskoeffizient für Zement-Mörtel-Mischungen wird durch die geringen Kunststoffzusätze so gut wie nicht beeinflusst.The coefficient of thermal expansion for cement-mortar mixtures is hardly affected by the low plastic additives.

Es ist auch möglich, auf diese Armierungsbeschichtung kunststoffmodifizierte mineralische Aussenputze bzw. Farbanstriche oder auch übliche Kunststoffdispersionsputze aufzubringen. Der unterschiedliche Wärmeausdehnungskoeffizient zwischen Armierungsbeschichtung und Kunststoffdisperiönsputz wirkt sich nicht sehr nachteilig: aus, weil der höhere Ausdehnungskoeffizient für Kunststoffdispersionsputze durch den elastischen Charakter dieser Putzbeschichtung ausgeglichen wird.It is also possible to apply plastic-modified mineral exterior plasters or paint coats or even conventional plastic dispersion plasters to this reinforcement coating. The different thermal expansion coefficient between the reinforcement coating and the plastic dispersion plaster does not have a very disadvantageous effect: because the higher expansion coefficient for plastic dispersion plaster is compensated for by the elastic nature of this plaster coating.

Die mineralisch aufgebauten Putze oder Farbanstriche; die auf die Armierungsbeschichtung aufgetragen werden, haben jedoch gegenüber den Kunststoffdispersionsputzen und Kunststoff-Fassadenfarben den Vorteil, dass sie Wasserdampf sehr gut passieren lassen und sich in Farbe und Eigenschaften im Laufe der Jahre nicht verändern. Die Kunststoffdispersions-Farbanstriche verschmutzen infolge erhöhter elektrostatischer Aufladung stärker; verspröden im Laufe der Zeit durch Zersetzung infolge UV-Einstrahlung und können infolge ihres erhöhten Wasserdampfdiffusionswiderstandes vom Untergrund abgedrückt werden. Ausserdem erweichen sie bei direkter Sonnenbestrahlung, was dazu führen kann, dass sich Dampfblasen bilden, die in der Nacht infolge Abkühlung wieder verschwinden, bis das Gefüge porös und rissig wird.The mineral-based plasters or paint coats; which are applied to the reinforcement coating, however, have the advantage over plastic dispersion plasters and plastic facade paints that they allow water vapor to pass through very well and their color and properties do not change over the years. The plastic dispersion paints become more dirty due to increased electrostatic charge; become brittle over time due to decomposition due to UV radiation and can be pushed off the surface due to their increased water vapor diffusion resistance. In addition, they soften when exposed to direct sunlight, which can lead to the formation of vapor bubbles, which disappear as a result of cooling at night until the structure becomes porous and cracked.

Die Wasserdampfdiffusionswiderstandsfaktoren der in Anwendung befindlichen Anstriche sind:

Figure imgb0001
The water vapor diffusion resistance factors of the paints used are:
Figure imgb0001

Bei einer zur Durchführung des Verfahrens geeigneten Dämmplatte aus Polystyrolhartschaum mit einer Nachschwindung von mindestens 1 mm/ m sowie einer schwalbenschwanzartig gefräste Rillen aufweisenden Oberfläche ist vorzugsweise ein Glasfasergewebe mittels Befestigungsmitteln in einem Abstand von 1 bis 2 mm von der Oberfläche der Platte einseitig angebracht, und die Platte besteht aus bandgeschäumtem Material mit verdichteter Oberfläche. Der als Befestigungsmittel dienende Klebemörtel weist vorzugsweise folgende Zusammensetzung auf:

  • Zement 10-80, vorzugsweise 40-60 Gew.-% Sand, Quarzsand oder anderer mineralischer
  • Füllstoff 0-80, vorzugsweise 30-50 Gew.-%
  • Kunststoff 2-50, vorzugsweise 10-20 Gew.-%.
In the case of an insulation board made of rigid polystyrene foam with a post-shrinkage of at least 1 mm / m and a surface with dovetail milled grooves, a glass fiber fabric is preferably attached on one side by means of fastening means at a distance of 1 to 2 mm from the surface of the board, and the The board is made of a foamed material with a compressed surface. The adhesive mortar serving as a fastening means preferably has the following composition:
  • Cement 10-80, preferably 40-60 wt .-% sand, quartz sand or other mineral
  • Filler 0-80, preferably 30-50% by weight
  • Plastic 2-50, preferably 10-20 wt .-%.

Nach dem Ankleben der Dämmplatten wird der kunststoffmodifizierte Zement-Mörtel von Hand oder mittels einer Mörtelspritzmaschine aufgebracht und geglättet. Diese Beschichtung kann, entsprechend eingefärbt, in diesem Zustand belassen oder mit einem üblichen Putz beschichtet oder mit einem Farbanstrich versehen werden.After the insulation boards have been glued on, the plastic-modified cement mortar is applied and smoothed by hand or using a mortar spraying machine. This coating can be appropriately colored, left in this condition or coated with a conventional plaster or painted.

Nachfolgend wird die Erfindung anhand der Beschreibung eines Ausführungsbeispiels unter Bezug auf Zeichnungen näher erläutert. Es zeigt:

  • Fig. 1 eine erfindungsgemässe Dämmplatte in Draufsicht
  • Fig. 2 die Dämmplatte in Frontansicht.
The invention is explained in more detail below on the basis of the description of an exemplary embodiment with reference to drawings. It shows:
  • Fig. 1 an inventive insulation board in plan view
  • Fig. 2 the insulation board in front view.

Auf einer bandgeschäumten Polystyrol-Hartschaumplatte 1 mit verdichteter Oberfläche befinden sich Befestigungsmittel 2, auf denen das Glasfasergewebe 3. angebracht (aufgeklebt) ist, die Rillen 4 sind schwalbenschwanzartig hinterschnitten. Es ist jedoch auch ohne Nachteil möglich, Rillen mit senkrechten Wänden vorzusehen. Der beste Verbund zwischen der gerillten Platte 1 und dem abgebundenen Putz wird dann erhalten, wenn Hartschaumplatten 1 mit grösstmöglicher Nachschwindung eingesetzt werden, d.h., wenn Platten 1 verwendet werden, die frisch produziert wurden und wegen des hohen Treibmittel- bzw. Lösungsmittelanteils nach herkömmlicher Lehre mindestens 3 Monate gelagert werden müssten. Als vorteilhaft hat sich weiterhin erwiesen, die notwendigen Rillen nicht in die Platten mitzuformen, sondern diese nachträglich.einzufräsen. Weiterhin ist es möglich, in an sich bekannter Weise an den.Rändern zur Erleichterung der Montage stufenartige Vorsprünge 5 und Rücksprünge 5' anzuordnen, um derart gleichzeitig Überlappungen herzustellen.On a tape-foamed polystyrene hard foam sheet 1 with a compacted surface the fastening means 2, on which the glass fiber fabric 3 is attached (glued), the grooves 4 are undercut like a dovetail. However, it is also possible to provide grooves with vertical walls without disadvantage. The best bond between the grooved board 1 and the set plaster is obtained when rigid foam boards 1 with the greatest possible post-shrinkage are used, i.e. when boards 1 are used that have been freshly produced and at least according to conventional teaching due to the high blowing agent or solvent content Should be stored for 3 months. It has also proven to be advantageous not to form the necessary grooves in the plates, but to subsequently mill them in. Furthermore, it is possible to arrange step-like projections 5 and recesses 5 'in a manner known per se at the edges to facilitate assembly, in order to simultaneously produce overlaps.

Das Verfahren wird dabei zweckmässigerweise so durchgeführt, dass man unabgebundene kunststoffreiche Stempel mit wirksamen Haftflächen in der Grössenordnung zwischen 20 bis 2000 mm2 auf die Hartschaumplatten 1 aufbringt und sofort anschliessend darauf das Glasfasergewebe 3 legt. Man lässt den Mörtel der Stempel abbinden und trägt dann den eigentlichen Putz auf: Überraschenderweise wird der aufgetragene kunststoffarme, also keine Haftwirkung aufweisende Putz von dem Glasfasergewebe ausreichend festgehalten, wobei unterstrichen werden muss, dass das Auftragen des Putzes hier wie beim Stande der Technik in senkrechter Anordnung auf die an der zu dämmenden Wand befestigten Platten erfolgt. Es ist auch möglich, das Gewebe über die Ränder überstehen zu lassen, um die anfängliche Haftung der nassen Armierungsbeschichtung im Randbereich zu er höhen. Auf die Qualität der fertigen Dämmschicht hat dies jedoch keinen Einfluss.The method is expediently carried out in such a way that unbound plastic-rich stamps with effective adhesive surfaces in the order of magnitude between 20 and 2000 mm 2 are applied to the rigid foam panels 1 and the glass fiber fabric 3 is then immediately placed thereon. The mortar of the stamp is allowed to set and then the actual plaster is applied: Surprisingly, the plaster applied, which is low in plastic and therefore does not have an adhesive effect, is sufficiently held in place by the glass fiber fabric, whereby it must be emphasized that the plaster is applied here vertically, as in the prior art Arranged on the panels attached to the wall to be insulated. It is also possible to allow the fabric to protrude beyond the edges in order to increase the initial adhesion of the wet reinforcement coating in the edge area. However, this has no influence on the quality of the finished insulation layer.

Die bandgeschäumten Platten 1 mitverdichteter Oberfläche sollen ohne Formtrennmittel hergestellt werden. Bei Dämmplatten mit Formtrennmittel auf der Oberfläche kann die Haftung eines kunststoffarmen Mörtels herabgesetzt sein.The foamed sheets 1 with a compacted surface are to be produced without mold release agents. With insulation boards with mold release agents on the surface, the adhesion of a low-plastic mortar can be reduced.

Claims (8)

1. Method for producing insulated plaster facades by applying glass fibre fabric (3) and plaster to the grooved surface of rigid polystyrene foam slabs (1), wherein the latter have a defined after-shrinkage of at least 1 mm/m, characterized in that strip-foamed rigid polystyrene slabs with a compacted surface are used and that first of all the glass fibre fabric (3) is applied with the aid of a fixing agent (2) distributed above the slab (1) to the said slab at a distance of preferably 1 to 2 mm from the slab surface, following which a plaster cont?tning 0 to 1% of plastics material is applied to the thus pretreated slab.
2. Method according to Claim 1, characterized in that an adhesive mortar known per se and having the following composition is used as fixing agent (2):
Cement 10-80 preferably 40-60% by wt Sand, Quartz Sand or other
Mineral filler 0-80 preferably 30-50% by wt
Plastics material 2-50 preferably 10-20% by wt
3. Method according to Claim 1 or 2, charac-. terized in that the slabs (1) are provided with the glass fibre fabric (3) before being applied to the wall to be insulated.
4. Method according to Claims 1 to 3, characterized in that the glass fibre fabric (3) is fixed to the slabs (1) preferably in the edge region of the slabs, with the aid of the fixing agent (2).
5. Method according to Claim 1, characterized in that the glass fibre fabric (3) is fixed to the slabs with the aid of fastening elements that can be inserted into the rigid foam slabs (1) and splay out like a dowel.
6. Method according to Claims 1 to 5, characterized in that a plaster mortar consisting of cement and sand, optionally with the addition of lime, is applied to the glass fibre fabric (3), to which is then added in a known manner methyl cellulose, acrylates, methacrylates and their copolymers eg. styrene acrylates and in addition preferably vinyl acetates and their copolymers, as plastics material.
7. Insulated slab of rigid polystyrene foam with an after-shrinkage of at least 1 mm/m and a surface having swallowtail-like milled grooves, for carrying out the method according to Claims 1 to 6, characterized in that a glass fibre fabric (3) is mounted on one side by means of fixing agents (2) at a distance of 1 to 2 mm from the surface of the slab, and that the slab consists of strip-foamed material having a compacted surface.
8. Insulated slab according to Claim 7, characterized in that the adhesive mortar serving as fixing agent (2) has the following composition:
Cement 10-80 preferably 40-60% by wt Sand, Quartz Sand or other
Mineral filler 10-80 preferably 30-50% by wt
Plastics material 2-50 preferably 10-20% by wt
EP79104520A 1978-11-24 1979-11-15 Process for manufacturing insulated plastered façades and insulating building panels for carrying out the process Expired EP0011781B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT79104520T ATE2236T1 (en) 1978-11-24 1979-11-15 PROCESS FOR THE MANUFACTURE OF INSULATED PLASTER FAÇADES AND INSULATION BOARD ELEMENTS FOR CARRYING OUT THE PROCESS.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE2850861 1978-11-24
DE19782850861 DE2850861A1 (en) 1978-11-24 1978-11-24 METHOD FOR PRODUCING INSULATED PLASTERING FACADES AND INSULATING PANEL ELEMENTS FOR IMPLEMENTING THE METHOD
DE7837566U 1978-12-19
DE19787837566 DE7837566U1 (en) 1978-12-19 1978-12-19 INSULATION PANEL FOR THE PRODUCTION OF INSULATED PLASTER FACADES

Publications (2)

Publication Number Publication Date
EP0011781A1 EP0011781A1 (en) 1980-06-11
EP0011781B1 true EP0011781B1 (en) 1983-01-12

Family

ID=25776594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79104520A Expired EP0011781B1 (en) 1978-11-24 1979-11-15 Process for manufacturing insulated plastered façades and insulating building panels for carrying out the process

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EP (1) EP0011781B1 (en)
IE (1) IE48993B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3239430A1 (en) 2016-04-29 2017-11-01 STO SE & Co. KGaA Method for manufacturing a facade system and device for executing the method

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Publication number Priority date Publication date Assignee Title
US4318258A (en) * 1979-03-14 1982-03-09 Friedrich Heck Thermal insulation for buildings
SE454607B (en) * 1983-01-11 1988-05-16 Hans Andersson Building elements
DE3445187A1 (en) * 1983-12-16 1985-06-27 Josef Salzburg Wallinger Construction board
DE3641972A1 (en) * 1986-12-09 1988-06-23 Eugen Traub CLEANING CARRIER INSULATION PLATE
ATE178381T1 (en) * 1994-09-23 1999-04-15 Wiehofsky Margot PLASTER BACKING
CN111424908B (en) * 2020-03-30 2021-07-23 中材(宜昌)节能新材料有限公司 Multipurpose building decoration decorative board

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DE2516916A1 (en) * 1975-04-17 1976-10-21 Friedrich Heck PROCESS FOR PRODUCING INSULATED PLASTER FACADES

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DE1658875B1 (en) * 1967-12-14 1971-09-30 Heinrich Hebgen Insulation panel for the external insulation of buildings and processes for their production
DE1942352A1 (en) * 1969-08-20 1971-03-04 Buchmann Rudolf Ch Component made of expanded plastic with plaster support made of expanded sheet metal and process for its production
FR2378143A1 (en) * 1977-01-24 1978-08-18 Gen Travaux Batiment Hooked staples for securing reinforced resin panel to wall insulation - where the staples engage the panel reinforcement netting
DE2713487A1 (en) * 1977-03-26 1978-09-28 Karner Karl Insulated hard foam panel for supporting rendering - has reinforcing fibre glass lattice mat impregnated and sheathed with synthetic resin

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DE2516916A1 (en) * 1975-04-17 1976-10-21 Friedrich Heck PROCESS FOR PRODUCING INSULATED PLASTER FACADES

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Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3239430A1 (en) 2016-04-29 2017-11-01 STO SE & Co. KGaA Method for manufacturing a facade system and device for executing the method

Also Published As

Publication number Publication date
IE792255L (en) 1980-05-24
IE48993B1 (en) 1985-07-10
EP0011781A1 (en) 1980-06-11

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