Apply one coat and then let it dry completely before applying a second coat. In some cases, you may even need a third coat, depending on the quality of the paint you use. If this is already sounding like more work than you have time or energy for, hiring a local painter and decorator can save you the hassle and stress.
"If there is a water stain, but the drywall is still hard to the touch and otherwise undamaged, you can move forward with a primer and paint," he explains, noting that your primer choice matters. "You can't just coat over a water stain, because it will bleed through—you must first use a water or oil-based primer."
What paint to use to cover water stains? To create a barrier that stops the water stain from showing through, you'll need to use either a stain-blocking primer or an oil-based paint first. After that, you can apply an emulsion paint if necessary.
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.
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. If the water level was greater than 2½ feet, the wall material should be removed to a height of 8 feet or the ceiling junction, whichever is higher.
After suitable surface application, apply 1 coat of Dulux Trade Stain Block Primer to all bare or stained surfaces to allow to dry. Two coats will be necessary for difficult stains. Finish with an appropriate Dulux Trade paint system.
KILZ RESTORATION® Primer (Formerly KILZ MAX) is a new generation water-based primer, sealer and stainblocker offering performance of traditional oil and shellac-based primers. It tackles tough stains including heavy water damage, rust, smoke, nicotine, grease, tannin, ink, pencil, felt marker, pet stains and more.
Glossy paint: 1-1 ½ hours and 2 hours before applying the second coat. Semi-gloss: It takes roughly 1 hour to dry and 2 hours before applying the second coat. Matte Paint: 30 minutes to an hour for drying and 1-2 hours before applying the second coat.
If you only paint the damaged part of the wall/ceiling, you'll end up with a patchy effect on your walls which can be almost as noticeable as a water stain. Apply one coat and then let it dry completely before applying a second coat.
Acrylic Latex Paint
Best For: Covering water-based old paint on interior walls.
So, replace it with a natural and effective magic eraser. Simply wet it and rub over the stain or spill. They work wonders by removing difficult stains and sticky residue from the delicate surface. You can pre-treat the area with hydrogen peroxide and achieve sparkling results.
Water-based, fast-drying paint for use over a water-based stain. Creates a sturdy coating and opaque finish that is well-suited for doors, trim, and cabinetry.
Mix equal parts white vinegar and water in a spray bottle. Spray the solution directly onto the stained area of the ceiling without overly saturating it. Allow it to sit for 10-15 minutes to penetrate the stain. Use a sponge or cloth to gently wipe away the stain, working from the edges inward.
In most cases, you'd want to replace any baseboards with water damage on them, unless the damage is minimal. For example, anything with peeling paint or a deformed shape should be replaced. But if all you notice is minor staining, let the baseboard dry and paint over it.
Zinsser Coverstain can be used both on interior & exterior walls and is especially effective on nicotine and water stains. It acts as an undercoat that can be painted onto, that possesses excellent stain killing performance.
Depending on how strong or bold the previous color is, it may be necessary to apply more than one coat of primer. However, it is not necessary to over apply the primer with so many coats. As long as the primer applies uniformly over the previous color, then one or two coats should be sufficient.
Original Kilz Primer allowed more seep through when put in two coats to two different walls in the same area, whereas Zinsser provided superior coverage.
Pro Tip: Avoid applying more than two coats unless explicitly recommended by the manufacturer, as excess pigment can lead to splotching or peeling.
Zinsser Bulls Eye 1-2-3
Zinsser 1-2-3 Primer is a water-based stain blocking primer that can be used for interior or exterior projects. This primer provides a high hiding and stain sealer, meaning you can enjoy surfaces free from stains like oil, water, fire and smoke damage.
You will need a stain blocking primer such as a simple spot primer in a spray can or you can paint it on with brush and roller. Our go-to product for blocking stains is Sherwin Williams Pro Block oil based primer. Another good product to use is Zinsser's B-I-N stain blocker.
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.
It can happen in just minutes if the leak is big. Water quickly gets into materials like drywall and flooring, causing them to swell, warp, and change color. But not all damage happens right away. Leaks that aren't fixed can cause big problems over hours or days.
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.