External wall with plaster and plaster carrier

1. A method for applying plaster to an external wall ( 1 ) having an outside, comprising the steps of:

attaching a plaster carrier in the form of a plurality of plates ( 2 ) to the outside of the external wall ( 1 ) at least partly by means of fastening devices ( 10 ) which are inserted through each of said plurality of plaster carrier plates ( 2 ) from the outside,

applying the plaster in a substantially continuous surface which extends over joints ( 9 , 13 ) between adjacent plates ( 2 ),

wherein each of said plurality of plaster carrier plates ( 2 ) comprises a central layer ( 4 ) of thermally insulating material and an inner and an outer reinforced, fire retardant plaster layer ( 5 , 6 ) on an inner and an outer side of the central layer ( 4 ), respectively,

placing reinforcement ( 11 ) over joints ( 9 , 13 ) between the adjacent plaster carrier plates ( 2 ), and

applying a finishing plaster layer ( 12 ) to said reinforcement ( 11 ) and the outer plaster layer ( 6 ),

characterized by providing an expanded polyurethane material for the thermally insulating material in each of said plurality of plaster carrier plates ( 2 ),

attaching each of said plurality of plaster carrier plates ( 2 ) to a lathwork or corresponding horizontally and vertically extending spacer elements ( 8 , 14 ) on the outside of the external wall ( 1 ),

inserting the fastening devices ( 10 ) on both sides of the joints ( 9 , 13 ) between the adjacent plaster carrier plates ( 2 ) and covering the fastening devices with the reinforcement ( 11 ) before applying the finishing plaster layer ( 12 ), and

filling a space ( 3 ) delimited by the outside of the external wall ( 1 ), the spacer elements ( 8 , 14 ) and each of said plurality of plaster carrier plates ( 2 ) with insulating material.

2. The method according to claim 1 , further comprising the step of using a reinforcement fabric with alkali resistant fibers to reinforce said inner and outer layers ( 5 , 6 ).

3. The method according to claim 1 further comprising the step of reinforcing the joints ( 9 , 13 ) with strips of reinforcement fabric with alkali resistant fibers.

4. The method according to claim 1 further comprising the step of providing the inner plaster layer ( 5 ) with a larger thickness than the outer plaster layer ( 6 ).

5. The method according to claim 1 further comprising the step of providing at least some of the horizontally extending spacer elements ( 8 ) with a sloping top surface and smaller thickness than the distance between the outside of the external wall ( 1 ) and the plaster carrier plate ( 2 ) for permitting drainage of condensation or leakage water.

6. The method according to claim 3 further comprising the step of using a reinforcement fabric with alkali resistant fibers to reinforce said inner and outer layers ( 5 , 6 ).

7. The method according to claim 3 further comprising the step of providing the inner plaster layer ( 5 ) with a larger thickness than the outer plaster layer ( 6 ).

8. The method according to claim 3 further comprising the step of providing at least some of the horizontally extending spacer elements ( 8 ) with a sloping top surface and smaller thickness than the distance between the outside of the external wall ( 1 ) and the plaster carrier plate ( 2 ) for permitting drainage of condensation or leakage water.

9. A plaster carrier for use in applying a finishing plaster layer ( 12 ) to an external wall ( 1 ), the carrier comprising:

a plate of insulating material for attachment to a lathwork or spacer elements ( 8 , 14 ) on an outside of the external wall ( 1 ) and for subsequent application of a finishing plaster layer ( 12 ),

wherein the plate is a composite plate ( 2 ) which comprises a central supporting layer ( 4 ) of a thermally insulating expanded polyurethane material having an inner and an outer side and an inner and an outer reinforced, fire retardant plaster layer ( 5 , 6 ) on the inner and outer sides of the supporting layer, respectively, wherein the inner plaster layer ( 5 ) has a larger thickness than the outer plaster layer ( 6 ), the outer plaster layer being intended for application of the finishing plaster layer ( 12 ), and

wherein said inner and outer plaster layers ( 5 , 6 ) are reinforced with a reinforcement fabric having alkali resistant fibers.

10. A plaster carrier for use in applying plaster to an external wall ( 1 ), comprising a plate for attachment to the external wall ( 1 ) and for subsequent application of a finishing plaster layer ( 12 ),

wherein the plate comprises a central layer ( 4 ) of thermally insulating material and an inner and an outer reinforced plaster layer ( 5 , 6 ) on an inner and an outer side of the central layer, respectively,

characterized in that the inner plaster layer ( 5 ) has a larger thickness than the outer plaster layer ( 6 ), the outer plaster layer being intended for application of the finishing plaster layer ( 12 ), wherein the thermally insulating material is an expanded polyurethane material, and

wherein the inner and outer plaster layers ( 5 , 6 ) are reinforced with a reinforcement fabric having alkali resistant fibers.

11. An external wall ( 1 ) having an outside and comprising an isolated supporting structure and an external plaster ( 12 ) applied using a method wherein a plaster carrier in the form of a plurality of plates ( 2 ) is attached to the outside of the external wall ( 1 ) at least partly by means of fastening devices ( 10 ) which are inserted through each of said plurality of plaster carrier plates ( 2 ) from the outside, whereupon the plaster is applied in a substantially continuous surface which extends over joints ( 9 , 13 ) between adjacent plaster carrier plates ( 2 ),

wherein the each of said plurality of carrier plates comprises a central layer ( 4 ) of thermally insulating material and a reinforced, fire retardant plaster layer ( 5 , 6 ) on both sides of the central layer ( 4 ),

wherein reinforcement ( 11 ) is placed over the joints ( 9 , 13 ) between the adjacent plaster carrier plates ( 2 ), and

wherein a finishing plaster layer ( 12 ) is applied to said reinforcement ( 11 ) and the plaster carrier,

characterized in that an expanded polyurethane material comprises the thermally insulating material in each of said plurality of plaster carrier plates ( 2 ), wherein each of said plurality of plaster carrier plates ( 2 ) is attached to a lathwork or corresponding horizontally and vertically extending spacer elements ( 8 , 14 ) on the outside of the external wall ( 1 ), wherein fastening devices ( 10 ) are inserted on both sides of the joints ( 9 , 13 ) between the adjacent plaster carrier plates ( 2 ) and are covered with the reinforcement ( 11 ) before the finishing plaster layer ( 12 ) is applied, and wherein a space ( 3 ) delimited by the outside of the external wall ( 1 ), the spacer elements ( 8 , 14 ) and each of said plurality of plaster carrier plates ( 2 ), is filled with insulating material.

12. An external wall according to claim 11 ,

wherein the plaster layer ( 5 ) on one side of the thermally insulating material has a larger thickness than the plaster layer ( 6 ) on an other side, wherein other side the finishing plaster layer ( 12 ) is applied to said other side.

13. An external wall according to claim 11 , wherein the plaster layers ( 5 , 6 ) are reinforced with a reinforcement fabric having alkali resistant fibers.