The first step toward getting a smooth, polished finish on walls and ceilings is plaster grinding. Whether you’re finishing off a plastered area or priming a surface for painting, knowing the tools and techniques required can be very important to the quality of your work.
First things first: choosing the appropriate instruments. You’ll need sanding pads, a dust mask to protect your eyes, and a high-quality plaster grinder or sander for the majority of plaster grinding jobs. Although manual sanding blocks are still favored for smaller, more intricate areas, electric plaster sanders are especially well-liked for their effectiveness and user-friendliness.
In the modern plaster grinding process, technology is essential. You can regulate the sanding process’s intensity with the speed settings found on many electric sanders. Another common feature that keeps your workspace tidy and lowers the amount of dust in the air is a dust extraction system. This makes the workplace healthier in addition to increasing visibility.
When it comes to the actual grinding technique, following a methodical approach is crucial. Using even, fluid strokes, begin at the top of the wall and work your way down. Don’t push too hard to prevent gouging the plaster. Give your electric sander the majority of the job if you’re using one. A smaller, handheld sanding block can assist you in getting a precise finish on corners and edges.
With the right tools and methods, a rough plaster surface can be made perfectly smooth and ready for painting or additional decoration. Every time you take on a plaster grinding project, you can guarantee a high-quality finish by taking the time to educate yourself about the tools and technology available.
Aspect | Description |
Tools | Plaster grinding typically uses a power sander or a hand sander with sanding paper of various grits. |
Technology | The process involves sanding the plaster surface in a circular motion, starting with coarse grit and gradually moving to finer grits for a smooth finish. |
- What is grouting and when to do it
- Tools
- What kind of sandpaper is needed
- Grater meshes
- Methods of manual grinding of a wall after plastering
- Dry sanding of walls
- Wet
- Glossing
- Do-it-yourself grouting of plasterboard seams
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What is grouting and when to do it
You can level the surfaces and remove minor flaws from the bases of plastered walls by grinding them.
Prior to painting, wallpapering, or applying a decorative plaster layer, work is completed after plastering. Considering that panels must be dried 24 hours before sanding, takes some consideration.
- leveling of surfaces;
- elimination of cracks, chips;
- making the surface aesthetically pleasing;
- increasing the level of adhesion;
- improving the characteristics of noise absorption, etc..
Tools
- a block for fixing sandpaper or abrasive mesh;
- sanding sponge;
- a set of spatulas;
- portable lamp;
- stepladder;
- sandpaper sheets;
- abrasive mesh;
- building level;
- rule, etc..
Work is done while wearing safety glasses, gloves, and a respirator.
What kind of sandpaper is needed
Sandpaper is chosen prior to wall sanding based on a variety of factors, including the base material, plaster quality (gypsum, cement, or mineral), type of treatment (puttying, priming), and room specifics.
- R22-36 – for primary treatment of walls;
- P40-60 – for rough grinding;
- P80-120 – for cleaning the base;
- P150-180 – for final grinding of metal surfaces;
- P240-280 – for sanding hard wood;
- P400-600 – for preparing bases for painting;
- P1000 – to make the base matte and smooth;
- Р1200 and more – for final glossy polishing.
The first step in treating a surface covered in decorative mineral plaster or gypsum plaster is to use coarse sandpaper to remove any unevenness. Next, sand with medium grit paper. Fine-grained sandpaper is applied to the surface as a final step. P1200 sandpaper is suitable for sanding chrome components as well as painted and varnished surfaces.
Different materials are used to make abrasive sandpaper sheets.
- garnet;
- ceramics;
- silicon carbide;
- aluminum oxide;
- corundum;
- diamond.
Sheets made of garnet are pliable, have a gentle grain, and work well with wood that is in relief. Sandpaper prolongs the life of wood by sealing pores and keeping it dry.
Hard metal processing can be accomplished by sandpaper sheets coated with silicon carbide. This kind of sandpaper works well for removing old dyes and modifying the shape of plastic products and parts.
On sandpaper, ceramic abrasive has a rough structure, is hard, and resists wear. Paper is made from the material and is utilized in the processing of hard woods. Sanding belts that are fixed on industrial machines are frequently coated with ceramic material.
- paper;
- fabric;
- Velcro;
- combined.
The least wear-resistant sandpaper has a paper base, but it is also the least expensive. The skins are frequently used for polishing because the base receives a finely grained coating.
A fabric base allows for a more resilient and wear-resistant cloth. Canvas gains its waterproof properties from a unique impregnation applied to the material.
It is advised to use this material when processing metal bases. After giving the canvases a quick wash, they can be used again.
Coarse-grained skins are made with combined base options. Density, a rigid structure, and enough elasticity to work on complex structures are the characteristics of the material.
Using grinding machines, sandpaper with Velcro is used for sanding. For easy attachment to the device, the canvas is shaped like a circle or rectangle.
Grater meshes
A sheet with perforations. A layer of abrasive is applied to the glue on top of a fiberglass or cloth base. The material’s small holes allow construction dust to pass through without clogging the work areas, which is an advantage. The nets are secured to unique bars or grinding wheels. Wearing safety glasses and a respirator is required when working with nets. Compared with sandpaper, the cost of the net is greater. Large cells or holes are used in the production of the cloths.
- silicon carbide;
- electrocorundum;
- pumice;
- corundum;
- synthetic diamond;
- elbor, etc..
The degree of coating granularity is considered when choosing a mesh. It is designated as the indicator P12-2500 on the packaging and varies based on the material quality.
Methods of manual grinding of a wall after plastering
You must choose a grinding technique before you can begin sanding the base.
- dry sanding;
- wet sanding;
- glossing;
- rubbing seams on plasterboard walls, etc..
Dry sanding of walls
It is essential to install a lamp and look for any irregularities to eliminate before processing the walls. Abrasive mesh or sandpaper is clamped onto a sanding bar. Sections measuring one by one meter are processed in a top-to-bottom motion. Circular motions and moderate pressure are needed. Excessive pressure can be used to remove the putty entirely. The float is applied parallel to the corners in areas where walls are joined, and rubbing is done using vertical movements.
The panel’s degree of smoothness is examined following processing. There might be minor surface scratches when a wall is ready for wallpaper.
Nonetheless, surfaces that are going to be painted need to be perfectly level. This requires careful selection of the paper’s or the abrasive mesh’s degree of graininess.
Wet
Surface grinding with this technique produces less dust. For this task, you will require a sponge float and a spatula. Water is used to moisten the sponge. The surface is then rubbed. In the subsequent phase, a spatula is used to smooth the wall, working from top to bottom. The smooth gypsum surface created by wet grinding is ready for wallpaper glue. Sand particles could still be present after applying cement plaster to a wall because of the particular makeup of the finishing mixture. There is no mechanical equipment needed for wet grinding.
Glossing
Plastered walls can be given a glossy, smooth layer thanks to this technique. The surface will be prepared for painting or applying wallpaper. This kind of processing is limited to surfaces that have a mixture of gypsum plaster. An entirely smooth cement-sand coating will not be achievable.
A sponge grater and a wide metal spatula are needed for the task. You must wait for fifteen to twenty minutes after applying the plaster and using a rule to level the base. Next, the wall panel is wet using a sprayer or a damp sponge. The wet base is sanded using a spatula at the following step.
Within 24 hours, you must repeat the glossing process to achieve greater smoothness. You won’t need to put putty on the wall after processing.
Do-it-yourself grouting of plasterboard seams
It is done by hand or with the use of a grinding machine in a dry method.
- The joints of the plasterboard sheets are covered with a putty mixture, the remains are removed with a spatula, running along the seam joints.
- Paper masking tape or mesh is glued on top of the wet putty.
- The tape is puttied in a thin layer and dried.
- After drying, the joints on the plasterboard boards are rubbed down with fine-grained sandpaper.
Achieving even and smooth surfaces for a variety of construction projects requires plaster grinding. It entails honing the plastered walls using particular instruments and methods to make sure they are flawless and prepared for painting or other finishes.
First things first: choosing the appropriate instruments. Larger power sanders, handheld sanders, and sanding blocks are frequently used tools. Power sanders are more effective for large areas, but sanding blocks provide better control for intricate work. Each tool has its advantages.
For plaster grinding to be effective, proper technique is essential. To start, give the plaster a quick light sanding to get rid of any raised or rough spots. To prevent leaving noticeable marks, it’s crucial to rotate the sander in a circular motion. For a smoother finish, gradually increase the pressure and change to sandpaper with a finer grit. Wear safety gear at all times to prevent dust and debris inhalation.
Make sure the surface is smooth at regular intervals during the process. To see if there are any remaining flaws, use a bright light. If any gaps or holes are found, fill them in with a thin layer of plaster and sand again after it dries. This guarantees an even and flawlessly smooth surface.
In conclusion, selecting the appropriate tools, using the right methods, and paying close attention to detail are all necessary for mastering plaster grinding. By practicing and being patient, you can improve the overall quality of your construction project by attaining a polished finish.
In order to achieve a perfect finish, plaster grinding is an essential procedure that levels and smooths plaster surfaces. To get the right texture, this process usually entails using specialized tools like grinders, sanding blocks, and occasionally even power sanders. Modern plaster grinding technology includes dust extraction systems to maintain a clean and safer work environment. Knowing the proper equipment and methods for plaster grinding can make all the difference in producing a polished finish, regardless of the size of the repair or renovation.