Surface analysis

Surface analysis. Surface characteristics and problems with them

How should the surface prepare?

Successful wallpaper sticking to the substrate should be dry, firm, at the same time hygroscopic, clean and flat. When using light wallpapers, it is necessary that the surface is evenly white. Accordingly, the surface of such wallpaper should be smoothed and equal.

Wet surface

Under no circumstances are a wet base suitable for wallpaper bonding or other coating. Very often, mold is formed on wet surfaces, which can damage and damage the building material.

If you try to glue the wallpaper on a wet wall, it will cause the edges to separate the folds, as well as worsening adhesion or grip on the surface directly.

How do I know if the surface is wet and what to do?
Analysis	Measures to be taken
Examination using film (if condensation is formed under the film, the wall is too moist). Moisture for measuring moisture (accurate detection of existing moisture).	Eliminate the causes of moisture formation. Let the surface dry. Heat and ventilate if necessary. Perform re -test.

Durability

During surface detachment (plaster, dispersion color, chalk dust) wallpaper gluing cannot be provided. The joints or even whole bands can be removed from the surface and damaging the overall picture.

How do I find out if the surface is unstable and what to do?

Analysis

Measures to be taken

Hardness testing when scratching or printing (if damage occurs on the surface during pressing, it is too soft).
Examination using adhesive tape (if the old coating sticks to the tape, it must be removed from the wall).

Remove the weak and unbearable surfaces parts.
The surface of a slightly lumpy or crumbled plaster can be applied (eg Metylan for old plaster).

Sintered layers

Sleep layers - accumulation of adhesive substances on the surface of the base, which inhibits durable wallpaper gluing and the implementation of other wall coatings.

How do you know if there are layers on the surface?
Analysis	Measures to be taken
Draw the grid shape on the surface with a sharp object and sprinkle it with water (if the traces of the scratches become darker, in which case it is possible to talk about sintered layers).	The sintered layers should be removed in a mechanical manner by grinding.

The ability to absorb moisture

The ability to absorb moisture is a crucial factor in ensuring successful wallpaper sticking. If the substrate has too weak absorption capacity or is no longer able to absorb moisture, the particular surface is not suitable for gluing wallpaper, as in this case no adhesion to the substrate will not be provided.
Similarly, problems occur if the surface is characterized by too much moisture. Then there may be various difficulties in the wallpaper gluing process, as the glue is absorbed too quickly in the base and an excessively high surface voltage occurs, which can form slits at the point of contact.

How do you know if the surface has an increased/insufficient ability to suck moisture?
Analysis	Measures to be taken
Wet with water (if water drains in the form of droplets, the substrate has a weak ability to absorb moisture; if the water is absorbed very quickly, the surface is characterized by too strong absorption).	If the surface does not have or has a weak absorption capacity, it is advisable to glue the repair of the repair of the repair. If the substrate has a high absorption capacity, the wall should be reinstalled on the wall.

Uneven surface

Grubbed and uneven surface shines through glued wallpaper, so after the repair, the wallpaper does not provide sufficient surface effect.

How do you know that the surface is not smooth or clean enough?
Analysis	Measures to be taken
Check the smoothness and cleanliness using the strong light of the torch.	Align the uneven surface with a filler. If necessary, stick the repair of the repair fliseline.

Alkaline

Alkaline surfaces, such as new plaster or concrete, are not suitable for gluing bronze wallpaper, and metal paint wallpaper. Other wallpapers can also cause fading, which will appear as spots on the wallpaper.

How do you know if the surface is alkaline?
Analysis	Measures to be taken
Dampen the surface with distilled water, add indicator paper, determine the pH (if the value is 7.8 or more, the substrate is considered alkaline).	The surface must dry until its pH reaches a value of 7. As an alternative solution, you can do alkaline surface double washing with multi -component fluuit, then washed the wall with clean water. Then glue the repair of the repair to the Flizeline.

Cracked surface

Cracks on walls and ceilings can adversely affect the wallpaper bonding process and the result.

What if there are cracks on the surface?
The types of cracks	Measures to be taken
Small cracks and mesh cracks (become visible by moistening the surface). Cracks and cracks in the seams (spread throughout the plaster layer to the seams) resulted in the resulting. Static cracks and tensile cracks (due to the structure of the building).	If there are fine, cracks resulting from landing, as well as cracks in mesh and seams, use a repair Flizeline for covering them. Static cracks require implementation of special measures.

Fungal damage

Mold fungus can occur in places where the environment is a favorable environment for the existence of mushroom nutrients and moisture.

What if the surface has signs of fungal damage?
Reasons	Measures to be taken
The room has too humid air (the cause of the mold is determined and eliminated).	Preventive measures such as regular ventilation and controlled heating contribute to a reduction in moisture.

Fading

White salt fades on the plaster surface occur, for example, due to increased horizontal insulation moisture, non -lively brick masonry or after damage caused by water exposure.

What if faded spots occur on the surface?
Reason	Measures to be taken
As a result of mere brick masonry or water exposure.	In this case, the wallpaper should not be glued until the troubleshooting measures are taken.