Useful tips for grinding walls after puttying

The process of puttying, however well executed, does not allow to obtain a perfectly flat surface. On the wall there are traces of a spatula, transitions between layers, small irregularities, hillocks and hollows are visible.

You can not do without grinding the surface. Grinding is the final process, preparing the surface for final finishing.

Anyone who has the desire, patience and perseverance can polish after puttying. The main thing is to choose the right tool, consumables and devices, to know the technology of the work.

Grinding is carried out dry or wet. Wet grinding is advisable on gypsum plasterboards, plastered walls under the rule. The main advantage of wet grinding in the relative purity of the process. You will not be bothered by dust, which is necessarily present when dry sanding. The process of subsequent cleaning is forgiven.

In domestic repair, dry grinding is more often used.

Rule 1
The grinding after the puttying is performed not earlier than 24 hours after the application of the puttying layer.

Tips for selecting tools, abrasives and accessories

Without properly selected tools and devices, it is not possible to produce high-quality grinding of walls after puttying.

You should have:

- sandpaper and grinding mesh;

- grinding sponge with cut edges, allowing grinding in hard-to-reach places.

Immediately notice, grinding mesh is not hammered during the work of dust, but is somewhat more expensive than sandpaper.

It is necessary to purchase a grinding bar or mandrel for securing sandpaper or grinding mesh. This device is correctly called a hand scooter.

Rule 2
The grinding paper has a different grain size. Numbers 20. .. 220 indicate a coarse-grained structure of the material, the numbers 250. .. 2500 correspond to fine-grained sandpaper.

Of the devices you will definitely need a ladder, a lamp or a searchlight, a wide spatula. Suitable and a wide table or goats, if their height allows you to perform work on the ceiling.

To ensure safety during grinding work, be sure to buy safety glasses, a mask or a respirator, a cap, a beret or a handkerchief.

We now turn to the process of surface grinding after puttying.
The grinding of walls and ceilings after puttying is carried out in a well-lit, ventilated room on an absolutely dry surface.

Technology of grinding the walls

In the first stage, use a spatula to walk the entire surface of the wall. Remove the tubercles, all kinds of protuberances, incrustations. When large depressions or pits are detected, fill them in, do not attempt to remove them by grinding.

Rule 3
Grind only on a dry surface.

Rule 4
It is necessary to install high-quality lighting on one side at an angle to the surface. Its position can not be changed during the entire grinding cycle.

The second stage involves surface treatment with coarse-grained sandpaper or grinding mesh. The consumable material is attached to the grinding bar.

Surface grinding is done from the top down, processing small areas with rotational movements. The size of the section should not exceed 1 × 1 m.

Grinding is better from top to bottom with strips no wider than 1 m. The movements of the hands during grinding are performed in a circle, but it is also possible to move up-down or left-right.

It is not necessary to force the tool heavily and grind it in one place for a long time. You can erase the entire layer of putty.

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After passing the entire surface with a coarse abrasive, continue grinding with a fine sandpaper. When using a finer emery cloth, be sure to bring the light source as close as possible to the wall.

Rule 5
Finishing is performed with less sweeping movements and less force on the tool.

Hard-to-reach places are sanded using grinding jaws or the grandfather method, folded in several layers by sandpaper.

Never handle corners and hard-to-reach places with a scooter. You just mess up the surface.

Rule 6
Correctly choose the granularity of the consumable. Properly selected emery should not leave deep scratches on the plaster.

If the abrasive leaves scratches, choose a smaller sandpaper. Under the wallpaper, minor scratches are allowed on the ground surface after puttying. But for painting the surface of the walls should be absolutely flat.

The grinding process is laborious and requires considerable effort to perform. It can be mechanized by using a special grinding machine. Grinding machines are provided, providing for the connection of a vacuum cleaner, which makes the process of grinding practically dust-free.

Do not use belt sanders. They are suitable for working with wood. An eccentric or orbital grinder is suitable.

Although the use of a grinding machine speeds up the grinding process, having no special skills to get a quality polished surface for a novice builder is very difficult.

It is necessary to feel the tool not only to move correctly, but also to adjust the force of pressing the tool onto the ground plane. Yes, and this tool is quite expensive.

After sanding, remove the dust layer, do a wet cleaning and check the surface quality. Before the finish finish, a primer coat must be applied.

Tip 1
It is better for a novice builder to use manual grinding
tools.

The grinding of the ceiling does not differ from the grinding of the walls. The process is more laborious and requires patience and accuracy.

Once again about the abrasive material

Grinding mesh is more convenient than sandpaper because it is not clogged with dust and dust during operation. But properly selected sandpaper also gives good results, besides it is much cheaper. When grinding walls after puttying with their own hands, it is best to use sandpaper numbers 120. .. 180( coarse-grained), and finish sanding with abrasive numbers 220. .. 280( fine-grained).

Tip 2
Apply the first layer of putty, when grinding, use abrasives with granularity No. 120. .. 180.After the second layer of putty, use abrasives from # 220. .. 280.

Sandpaper and mesh are marked identically on the back of the material.

How to control the quality of grinding?

At the beginning of the article it was indicated that the grinding process should be performed in good lighting, constantly directed from one place. Correctly adjusted lighting allows you to constantly monitor the process of grinding and its quality in the glare on the surface or on the lumen, applying an even ruler, the building level. Between the control tool and the wall there should be no gaps.

When it comes to the ceiling and it is prepared for painting, the ceiling needs to be grinded better. Refine the polishing zone with light, this will allow you to see the surface defects. Visible scratches shpaklyuyutsya and after drying are cleaned.

Grinding work ends with a thorough cleaning of the surface and the room and applying a primer to the dried and ground surface.
Good luck in this dusty business!