For water-damaged areas, you'll need to cut out the affected area rather than simply applying a patch over top of it. In this case, you'll also need: A new piece of drywall.
As long as you are certain it is dry, and that the source of the water has been corrected, then you can patch it however you like. Joint compound is commonly used that way.
With the damage scraped away and drywall sealed, you'll have a clean surface to patch with drywall mud. Apply in thin layers and allow each to dry thoroughly before sanding and applying the next coat.
2 Answers 2 Short answer: Yes. If the damaged area is small and not deep, light weight Spackle is a good repair material and dries in 20 mins. Apply it exactly like Evil describes. If the area is larger, joint compound is best. For product, I highly recommend using lightweight joint compound with dust control.
If the drywall is intact and dry then yea you can paint over it. They make primer specifically for that. Prime then paint. Would be easier than replacing rock.
Significant Water Damage: When drywall has been exposed to substantial amounts of water, especially if it becomes saturated, it is typically best to replace it. Mold or Bacterial Contamination: Any drywall exposed to contaminated water or showing signs of Mold must be replaced.
Color: Lighter colors tend to be more forgiving when it comes to hiding imperfections. Darker shades can highlight flaws, especially in direct light. Quality: High-quality paint with good coverage will help create a smooth, even appearance. Opt for a paint with a high solids content and good leveling properties.
All-Purpose Spackle All-purpose spackle is used for all standard repairs in drywall, such as cracks, holes, dents and dings. It contains gypsum powder, which allows it to harden to a similar consistency to drywall.
It's not advisable to paint over wet mud due to the associated complications: sagging, dislodging of paint, and a dull appearance.
As noted above, water damage will usually leave walls soft to the touch, or otherwise warped, buckled, and crumbled. It also tends to cause a musty smell and dark brown or yellow-tinted stains, lines, or rings in both ceilings and walls.
If the water level was less than 2½ feet, the wall material should be removed to a height of 4 feet to facilitate reinstallation of full sheets of drywall.
mildew and mold will develop within 24-48 hours of water exposure. Even worse, it will continue to grow until steps are taken to eliminate the source of moisture, and effectively deal with the mold problem. Use the diagram on the facing page to assess the extent of mold in your home.
Spackle is a lightweight, water-based compound that dries through evaporation of its water content. The small particles in spackle allow for quicker moisture removal, which results in a faster drying process of about 30 minutes for most small repairs.
It takes around 3-5 days to completely dry wet drywall, so patience is key, but you should be seeing consistent progress.
On the other hand, you want to be careful to avoid adding too much water, as the compound can fail—that is, crack and flake off—when it's too thin. You may also have to apply multiple coats that you wouldn't otherwise need to do. We want to be right in the middle with the consistency—not too thick and not too thin.
Do you always need to prime drywall before painting? It's important to prime after new drywall installation. The new surface will be porous and will absorb the color of the paint. Primers will also cover the joint compound and provide a good base for texturing or painting over skim-coated drywall.
You will want to use 2-3 coats of primer to ensure there is a good bond between the new paint and the wall, and also to cover up any previous colors, especially if they are red, orange, or a strange outdated color. In short, you will typically need 2 coats of primer for most painting projects.
However, lightweight spackling should be used only for smaller nail-hole repairs and dents, and not for medium-size or large repairs.
Spackle compound for drywall is made of gypsum powder and binders. It is thicker than joint compound (drywall mud), similar to the consistency of toothpaste. Spackle is sold in a premixed tub container. It is also available in several different grades designed for specific applications.
Spackling is sometimes mistakenly used as a skim coat. But spackling isn't made for this application – it dries too quickly, doesn't spread smoothly and is hard to sand* to a fine finish on large areas. So, when looking for a smooth, paintable surface, let the spackle do its job: repairing small damage.
To hide imperfections, such as cracks and dents, the Zinsser Bulls Eye 1-2-3 Plus Interior/Exterior Water-Based Primer works well. To promote adhesion and durability on surfaces, such as metal or tile, the Rust-Oleum Zinsser Bulls Eye 1-2-3 Plus Primer is an excellent choice.
Using Dark Color Paint:
Just like the same way, flat finishes reduce dent visibility; darker paints also reflect less light than lighter paints. This makes them a better choice for hiding drywall imperfections. The only drawback of using dark color paint often makes the room look smaller.
Smooth Finish: No one wants bumpy, patchy walls. PVA drywall primer smooths out inconsistencies in texture, making the final result look silky smooth.