How to determine the strength of the plaster?
To make a decision on partial or complete replacement of plaster, you need to examine the entire area and find out how well it keeps on the wall. Check it with a spatula or scraper. If plaster is crumbling only in some places, then it is necessary to make shpatlevanie weak areas or cover it with a mixture of fine grained sand.
If the lime or cement plaster begins to fall off when removing the wallpaper, then "fix" this coating is impossible. You will have to completely remove it and apply a new one. To determine the strength of plaster ceilings, slopes and walls, you need to tap the entire surface with a handle or hammer. In those places where it is kept weak, a deaf sound will be heard.
In case of dampness in certain places on the walls and thus weakened the plaster, it is important to remove the old coating not only in these areas, but also 50 centimeters above( below) the level of moistening. The existing grease stains can not be removed only by washing. It is necessary to prepare the walls for plastering and cut down those areas where there is fat. Then everything is covered with new plaster.
Any cracks on the ceiling and walls first expand to V-shape and are wetted with water. Then they are plastered and rubbed. The mixture of plaster is applied in several stages. First to the very bottom, after drying to 2/3 of the groove and at the end completely cover with a crack. Therefore, with the question - how to clean the wall of plaster, you must apply the above recommendations.
Tools
You can also remove plaster in several ways and with different tools. The removal of the plaster and the choice of tools depend on how firmly it is held on the wall. We list the main tools that may be needed when removing the old plaster.
- Hammer.
- Spatula.
- Bulgarian.
- Scraper.
- Ax.
- Shoulder.
- Special machine for removing plaster.
- Rotary hammer.
How to remove old plaster?
If you have a question - how to remove plaster from the wall, the following technology is suggested. To begin with, it is necessary to completely or partially remove the plaster( this is written above).Further, the damaged areas or the whole wall "beat off".About how to repel the plaster, we will tell below.
The whole surface breaks through the hammer. Weakened areas immediately disappear. Then, with a spatula or scraper, they are scraped off. Durable areas are moistened with water using a brush or rag. Then they rattled again with a hammer. The crumbling coarse-grained plaster is easily cleaned with a spatula. However, this is a long process, requiring some effort. It's easier to use a special mesh.
"Advice! Periodically spray the surface with water to reduce the amount of dust. To do this, you can use a sprayer with water. Also, for precaution, it is worth wearing a gauze bandage, gloves and goggles »
In cases where the plaster is difficult to beat manually, you can use a puncher with the option" kick ".How to remove plaster with this device is written in the instructions, but the technique is fairly simple. For this purpose, a special nozzle is fixed in the socket, and the switch is put in the "kick" position.
Often used and Bulgarian. On it is fastened a cutting circle with a diamond edge. Transverse and longitudinal cuts are made on the surface. At the final stage, use conventional tools, such as a scraper, spatula.
There are also power tools for removing the plaster layer. For example, the machine for removing plaster AGP, Flex or grinding machine of the USM, LSM, FSM.The use of this or that tool directly depends on the thickness of the layer, the type of plaster, the density and the required surface cleanliness.