Coating knowledge: how to carry out wall surface treatment before painting

Core tip: new wall: dry the wall thoroughly, and the mortar shall have enough drying and curing time, at least 21 days Clean the surface to be painted, and remove the splashed cement particles and any loose and broken attachments For small holes and cracks, the coating itself has the function of leveling, but for large depressions and cracks, it needs to be leveled with putty, and the painting can be started after it is dried and polished In order to obtain the best painting effect, the whole wall can be fully coated with putty and polished to obtain a smooth and delicate surface Old walls that have not been painted: the surface must be solid and in good condition Any damage must be removed with iron brush, and Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Paint Home News: new wall: make the wall completely dry, mortar should have enough drying and curing time, at least 21 days, clean the surface to be painted, remove the splashed cement particles and any loose and broken attachments For small holes and cracks, the coating itself has the function of leveling, but for large depressions and cracks, it needs to be leveled with putty, and the painting can be started after it is dried and polished In order to obtain the best painting effect, the whole wall can be fully coated with putty and polished to obtain a smooth and delicate surface Old wall surface that has not been painted: the surface must be solid and intact, any damage must be removed with iron brush to remove the floating materials, and make up for painting Small cracks can be filled and polished with putty When the cracks are large, it is necessary to cut the cracks into V-shape first, and fill them with cement putty or acrylic putty Old painted wall: if the original paint film is still intact and adheres closely, after cleaning the dust on the surface, try whether the top coat to be painted matches the old paint, and then directly brush If the paint film has cracks, blisters, pulverization and falling off, it must be removed with a blade After cleaning, it should be painted Cracks shall be filled with putty with good weather resistance If there are algae and fungi growing, they must be removed with mould proof solution and painted after the surface is dry Wallpaper: it is not allowed to brush paint on the wallpaper directly It is better to remove the wallpaper The new polyethylene wallpaper can be torn off directly by hand without water, and the residual liner can also be scraped off after wetting Other polyethylene materials and traditional wallpaper are not easy to handle You can choose to use diluted detergent or hot water to help soften the glue It is recommended to try hot water first Lay a cloth on the floor first, and then use a large sponge stained with detergent to daub on the wallpaper at will until the glue softens In order to achieve this, it is necessary to daub it many times, and carefully scrape and shovel as many wallpaper and glue as possible If the wallpaper is pasted on the unpainted plaster or wallboard, it will damage the wall as much as possible if you shovel it thoroughly Finally, rinse the wall with clean hot water and let it dry completely In this way, the wall can be painted after cleaning If you have to paint on the wallpaper, you should first try to brush on a small area to see if there is peeling, blistering and sagging If not, you can brush on the whole surface Home of coatings is specialized in coatings, diatom mud, paint coating, coating technology, fire retardant coating news and coating, diatom mud, paint coating, coating technology, fire retardant coating decoration knowledge and decoration renderings,