Can the Walls be Painted Directly?
The cement wall cannot be painted directly, because the construction wall is flat and easy to contain dust and other dirt. Direct painting will not only cause pits on the wall, but also easily lead to peeling, and the cement is alkaline, so directly apply the wall paint. Waiting for a long time is easy to take lye.
Soft Pattern Roller
Cement wall painting-the steps of cement wall painting: first cleaning the base layer → filling putty, partial scraping putty, smoothing → first full scraping putty, smoothing → second full scraping putty, smoothing → brushing and sealing Primer → apply the first paint → refill putty, smooth → apply the second paint → polish and work.
Hand brushing, rolling and spraying can be used as the construction method when painting, and the technique should be continuous and rapid when painting.
Matters needing attention when painting
1. Cleaning the original basic level of the wall: mainly includes cleaning the original putty layer, latex paint (wallpaper), other surface decorations, wood decoration, etc.
2. Deal with the problem of waterproofing: In places such as kitchens and bathrooms, a layer of waterproof paint needs to be used more than walls in other spaces.
3. If there is a crack, repair it first: Usually, it is necessary to paste kraft paper, grid fiber cloth, etc. on the wall with cracks, the joints of light-weight walls and load-bearing walls, and the joints of gypsum board. Bandages and other materials.
4. Applying primer for the first time: Applying primer is to protect the topcoat, improve the covering power and texture of the topcoat, in addition to the functions of alkali resistance and moisture proofing, and sealing of the substrate.
Cement wall painting method
Hand brushing, rolling and spraying can be used as the construction method when painting, and the technique should be continuous and rapid when painting. The editor feels that the loss of materials by hand brush is relatively less, and the quality can be guaranteed, but the construction period is longer, so it can be combined with roller coating, using roller coating for large areas, and hand brushing for corners. In this way, it can improve efficiency and ensure quality, which is very practical.
Precautions for painting cement walls
The coating solution must be fully stirred and evenly mixed. If the viscosity is too high, add water appropriately, and if the viscosity is small, add a thickener appropriately. Pay attention to the wall painting construction to ensure that the temperature is higher than ten degrees celsius. There should be no large amounts of dust indoors, and it is best to avoid Open rainy days.
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Painting can seem complicated. There are tons of things to consider before, during and after painting. Typically, lots of planning goes into a well-done paint job, but even great painters have questions. We're here with painting advice and to answer your questions.
Q: Why does my flat or low sheen paint show handprints and marks, and mar the wall when I try to scrub them off?
A: In general, flat and low sheen paints do not have a high scrubbabilty factor. Areas that are of higher traffic or that are frequently washed should be painted with a higher sheen paint. At minimum, a Satin sheen type or higher is recommended in those areas, for their overall durability. This will allow you to clean more often and lengthen the time before you will need to paint again.
Q: How long does it take for latex paint to "cure"?
A: Even after a paint dries, it takes time to fully cure. Depending on color choice, atmospheric conditions, and other variables, latex paint may take up to 60 days for a “full cure”. Latex paint can be put to normal use after a day or two, but should be allowed to cure for at least 14 days before attempting to wipe or wash the walls.Latex paints can be sensitive to water or chemicals during the curing process. Also, lower paint sheens will be more susceptible to moisture and chemicals even after they are fully cured.
Q: What causes lap marks in dried paint?
A: Lap marks are created when a wet edge is not maintained while painting. It can also be caused when the paint is applied in a vertical motion only. Make sure to keep a wet edge and spread the paint in a “W” or “M” pattern on the wall. This will help spread the coating and create an even film on the surface. Once this is done, you can go right back over that area and lightly roll from top to bottom to minimize a “shadowing” effect in the dried film.
Q: Why don't the square footage rates on the container match what I am getting on my surface?
A: The coverage rates on the container are based on a theoretical calculation. This calculation does not account for any loss due to product left in the container, on roller covers or brushes, or variations in the painting surface. Depending on these variables as well as overall surface porosity, you may see a lesser spread rate than what the “theoretical” coverage rate is on the container.
Q: Why does the paint on my freshly-painted wall peel off when I remove the masking tape from the trim?
A: Masking tape or “painter's tape” tends to stick to fresh paint if not removed shortly after painting, or if it is pulled improperly from the surface. When the paint is applied to the walls, it will inevitably cover over the tape as well. As the paint starts to dry, it will start to adhere to both and the tape. This “bridge” of paint from the walls to the tape will lift as the tape is removed.Before removing tape, gently “score” the edge of the tape with a sharp razor or utility knife. This will help break the “bridge” or “film” between the painted wall and tape. Also, as you pull the tape, stay close to the wall but gently pull away from the painted edge, to help minimize the problem.
Q: Why is my paint not covering after one coat has been applied?
A: There are several reasons why paint will not cover in one coat. Some of the main reasons include:Drastic color changes, i.e., light to dark color or dark to light color; Over thinning the product; Stretching the product near or beyond its coverage rate; Used the wrong roller cover for the surface.
Q: How do I tell if the paint on my walls is latex or oil-based?
A: Put a small amount of denatured alcohol or finger nail polish remover on a cloth and lightly rub it on an inconspicuous test area.If the paint softens and is easily removed, then it is a latex paint. If the paint does not really seem to be affected by the test, it is typically an alkyd, or oil-based, coating.