How to Paint the Cement Wall?
The editor clearly tells you that cement walls cannot be painted directly, because the construction walls are 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. In addition, the cement contains alkaline, so it is easy to take alkali bloom after waiting for a long time.
2. The steps of painting cement walls
First, clean the base layer → fill the putty, scrape the putty locally, smooth → the first pass full scraping putty, smooth → the second pass full scraping putty, smooth → apply the sealing primer → apply the first coating → refill Putty, smoothing → brushing the second coating → polishing and working.
3.Paint the cement wall to ensure the quality
The key link of the construction quality is definitely the grassroots treatment. The basic guarantee condition is that the wall must be completely dry, usually for more than ten days; the wall needs to be scraped with at least two layers of putty to ensure the smoothness of the wall. The putty should follow The performance of the coating is matched. Water-resistant putty should be used in wet places such as toilets, and special putty should be used for internal and external walls. After putty, the external wall needs to use alkali-resistant primer, and the interior wall can be directly coated without alkali-resistant primer.
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4. The method of painting cement walls
Hand brushing, roller coating and spraying can be used as the construction method when painting. The technique should be continuous and rapid, and the brush should be finished at one time. 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.
5. 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.
Well, the above is the introduction of the editor on the wall painting process. I hope that friends who are decorating or planning to decorate will read it carefully, or collect this article. Don't paint directly on the cement wall, so as not to lose money. Also, I want to remind friends that the corners and corners should be applied evenly and carefully to avoid omission. When brushing in higher places such as sheds, you must pay attention to safety. Choose a ladder of appropriate height and avoid dangerous actions such as tiptoeing. At this time, a relative or friend can hold the ladder below. In short, remember that safety comes first. Our company also has 6 "Pattern Roller on sale, welcome to contact us.
Guide to Concrete Painting step by step
Painting concrete surfaces requires extra skill, tools, and time than throwing a coat on drywall. Here’s how to do it right.Concrete portray is trickier than portray most surfaces: It breathes, transports moisture, and sucks up paint.
While you can paint drywall in a day or two, you’ll need a week or more to finish painting concrete. Continue reading below for tips -- plus costs -- on how to paint concrete surfaces:
1. Clean the Concrete
Cleaning concrete is a vital first step because the porous surface tends to trap dirt, grease, and oil.
a. Remove dirt and grease with trisodium phosphate or choose a more Earth-friendly cleaner like Krud Kutter’s pre-paint cleaner.
b. Yank off vines and moss growing on the foundation. Use a pressure washer to finish off remaining roots and dirt.
c. Remove efflorescence, a white powder that forms on moist concrete. Try Krud Kutter Concrete Clean & Etch ; if you need more cleaning muscle, try phosphoric acid masonry cleaner.
2. Strip Old Paint
Strip peeling or blistering paint indoors with a wire brush and a paint scraper, and lots of elbow grease.
Outdoors, get rid of old paint with a power washer .
3. Seal Interior Concrete
Water moves easily through porous concrete, so sealing interior walls is necessary to prevent moisture from seeping in, promoting mold growth and that cold, damp basement feel. Use a masonry sealer, such as ThoroSeal, that also patches cracks .
Carefully follow directions for mixing, applying, and curing the sealer. ThoroSeal, for example, requires two coats; the manufacturer recommends curing for five to seven days before applying the second coat.
4. Prime the Concrete
Concrete primer, called block primer, fills pores and evens out the surface. For exterior foundations and walls, use exterior-grade block filler, such as Behr’s Concrete and Masonry Bonding Primer, which also is good for interior concrete. Primer dries in two hours; wait at least eight hours, but no more than 30 days, to paint.
5. Paint the Concrete
Masonry paint (also known as elastomeric paint or elastomeric wall coating) is a properly desire for concrete portray due to the fact it consists of binders that contract and amplify with the concrete. Exterior residence paint can crack and peel on concrete.
Masonry paint can be tinted and is much thicker than exterior paint. Apply it with a masonry brush, a high-capacity (0.75-inch or higher) roller, or a texture roller .Some masonry paint is thicker than exterior paint and contains fine particles that can clog air sprayers. If you want to spray-paint cement, ask your local paint store for a product that will work well in a sprayer .No rely how you practice paint, let it dry for a day between coats. You’ll likely want two to three coats, so test the long-range climate forecast earlier than you begin.