The difference lies in the fact that damp wall plaster removes moisture from the masonry and does not seal it in. With a restoration render, the moisture is buffered and “locked in”. With damp wall plaster, there is no dense pre-spray, so breathability is retained. The damp wall plaster absorbs the moisture from the damp masonry and releases it in vapor form, so the masonry dries out and the moisture does not rise higher, resulting in no consequential damage.
A dense pre-spray – as with restoration plaster – prevents the breathability of the plaster, so the moisture rises higher through the capillary network, even above the original moisture damage.
Thanks to its high breathability and open-pored pore structure, damp wall plaster guarantees that excess moisture can escape and your masonry can dry out optimally. The plaster acts like a breathable raincoat that allows moisture to evaporate from the wall, preventing new moisture from penetrating from the outside.
The plaster can be used on any damp, moldy masonry containing harmful salts (Saliter). Whether in the cellar, stairwell, first floor, façade, garage, garden fence, plinth and also in the case of condensation moisture in new buildings, as well as plaster after flooding, etc. For brick, mixed and stone masonry, clay etc.
The render cannot be used with pressurized water.
A total of 2.5 cm is required for the plaster to function properly, including primer. A higher application thickness is usually required in old buildings. The thicker the plaster, the better the effectiveness and evaporation possibilities of the plaster. It is often the case that between 3 and 4 cm of plaster is required. Especially if you have to match the existing plaster.
For an area of 1 m² of plaster with a plaster thickness of 1 cm, 14 kg of dry mortar is required.
Yes, but the pre-spray is not a different material, it is the same as the hand-mixed plaster, only thinner. This means that the pre-spray, including roughcast, has the same open-pored properties. (in contrast to restoration plaster, which has a dense pre-spray).
We calculate 7 kg of dry mortar per m² for a 100% covering pre-spray.
No, pre-spraying is not a separate product for us. We have 1 product for pre-spraying and rough plaster. This means that the pre-spray and coarse plaster have the same open-pored properties (in contrast to the renovation plaster, which has a dense pre-spray).
The entire damaged old plaster must be stripped down to the masonry (brick/stone/mixed masonry). The amount to be removed depends on the visible damage or the amount of moisture that has already risen in the masonry. It is recommended to remove the plaster 1 m above the visible level of damage.
Yes, it is necessary to remove all of the damaged old plaster down to the brick/stone/mixed masonry.
POROment is the main product for damp masonry. POROment is a very resistant render against moisture and harmful salts. This plaster is the most efficient for all moisture damage. POROment is a cement-bound render. KALKOpor is used on historic buildings and consists of pure NHL2 lime and additives. The POROment and KALKOpor product lines differ in the binder.
The difference lies in how the plaster is applied. Hand plaster is applied by hand using a trowel, whereas machine plaster is applied to the wall using a plastering machine.
Which damp wall plaster is more suitable for renovation depends on several factors, such as the conditions on site, the old building stock or possible monument protection, as well as personal user behavior.
Moisture escapes due to the strong and effective surface enlargement and the combination of micropores and macropores. This special pore structure developed by Buschek allows moisture to escape 10 times faster than new moisture is added.
The dry mortar is available in 25 kg bags.
The products are only available in the respective standard sizes, see also online store.
There are only short drying times when working with damp wall plasters. Pre-spraying today, rough plastering tomorrow = 24 hours between plaster layers.
We recommend a drying time of at least 10 days per 1 cm of plaster thickness.
No, it is essential to ensure that mineral paints are used. In our range you will find the right paint to match the plaster. Emulsion paints and silicone resin paints, for example, are not suitable as they prevent the damp wall plaster from breathing.
When selecting a paint, it must be a mineral paint with a very low organic content (less than 4%). In our range you will find the right colors to match the plaster.
The following must be observed when applying damp wall plaster: carefully knock off the old plaster (no old plaster residue, bare brick/stone); scrape out joints; determine the knock-off height (at least 1 m above the measurable damage zone); maintain a minimum plaster thickness of 25 mm; plaster separation/decoupling – do not allow to sit on top (no contact with the floor).
Only remove the coarse plaster with the rough-sawn wooden lath; rubbing the plaster will compact the pore structure and impair its functionality or make it inadequate. The fine plaster can be rubbed on with a sponge board or a polystyrene plane, for example.
There is a minimum application thickness of 2.5 cm.
After a 100% covering primer coat, up to 2.0 cm of plaster can be applied in a single coat. The following day, the next layer can be applied immediately up to the required plaster thickness. No further drying times are required between the plaster layers as with restoration plasters (approx. 1 week or more per 1.0 cm application thickness for restoration plasters).
The mixing instructions and mixing time must be strictly adhered to. It can be mixed with a mixing machine or with a whisk (slowly rotating).
Yes, a whisk is also suitable for smaller repairs, but the mixing time must be observed. When using a whisk, it is important to use it at a reduced speed, as the plaster will be overmixed if the speed is too fast!
The damp wall plaster can be applied by hand or by machine – in the case of machine application (plastering machine e.g. G4), please ensure that the plaster variant machine plaster has been selected. (A plastering silo can be ordered for large projects).
The damp wall render can be applied in any thickness / depending on the existing structure. Please note that up to 20 mm of plaster can be applied per coat for coarse plaster. Only a short drying time of 1 day is required between the plaster layers.
Up to 20 mm of plaster can be applied per coat.
The subsequent moisture barrier must be applied before the plaster renovation. Whether this is necessary can be clarified in the course of a technical consultation.
When carrying out subsequent damp-proofing of masonry against rising damp, a 1- or 2-row chain of boreholes is drilled, depending on the wall thickness, into which the certified Gesan injection cream is injected. This injection cream is distributed in the wall and forms a barrier so that moisture can no longer rise.
It depends on the use of the property. In inhabited rooms, it has proven to be very effective to apply a dry lining, as the moisture is prevented from rising any further. It is also the case that damp walls are harmful to health.
The render lasts 3 – 4 times longer than conventional renders.
Buschek’s damp wall plasters have been used successfully since 1999
Yes, the plaster can also be used in the bathroom, but the room should not be tiled up to the ceiling so that the damp wall plaster can release the moisture unhindered.
Yes, tiles may also be applied to damp wall plaster, but not over the entire surface, as otherwise moisture cannot be released.
No fine plaster needs to be applied for the function of the plaster, it is a matter of the aesthetic impression. In splash water areas on the outside, a fine plaster or paint is advantageous to protect the damp wall plaster from road salt and other soiling.
Yes, if no fine render is required, the coarse render is sufficient for the function. The coarse plaster should be removed with a lath and must not be pushed in – this would impair the function of the damp wall plaster.
Refurbishment should be carried out for various reasons. For example, the preservation of the building fabric to prevent any major damage occurring later. Refurbishment also means an increase in the value of the property.
There are properties where the damp wall plaster was successfully applied over 25 years ago and the plaster still does its job and removes moisture. The wall surface is dry, mold-free and undamaged.
There are properties where the damp wall plaster was successfully applied over 25 years ago and the plaster still fulfills its task and removes the moisture. The wall surface is dry, mold-free and undamaged.
The damp wall plasters have already been applied to numerous properties. These include plinth and façade renovations, entrance areas, stairwells, cellars, garages, basements and first floors.
In addition to Hof Palace, the Albertina, various prisons and Schönbrunn Palace, numerous hospitals, schools and privately owned properties have also been successfully renovated with Buschek damp wall plaster.
There is no guarantee for in-house processing, but what we do promise is that our damp wall plasters have a very long life cycle, i.e. they have been in use since 1999 without any complaints.
Give us a call on +43 (0) 2687 42 717, send us an e-mail at info@buschek.at, or use our contact form to reach us directly. We look forward to hearing from you!
