Efflorescence Tips and Tricks

How to Stop Efflorescence

Three Methods:

Efflorescence occurs when salt and moisture come to the surface of concrete, bricks, or stone and then evaporate, leaving unsightly white marks on your walls or floors. Luckily, there are easy ways to remove efflorescence in your home. By cleaning the area and taking preventative measures, like applying a waterproof sealant, you can say goodbye to efflorescence once and for all.


Removing Efflorescence

  1. Apply vinegar to the affected area to avoid using chemicals.Dampen the wall with water first. Mix even portions of vinegar and water to create a solution. Regular white vinegar with 5% acidity works fine. With a sponge, apply vinegar to the area with efflorescence and clean it a circular motion.Leave the solution on the area for 10 minutes before rinsing the area thoroughly with water.
    • Vinegar works best on surfaces like stucco, but can also work on concrete and bricks.
    • It may take multiple applications of vinegar solution to completely remove efflorescence from the area.
  2. Scrub smooth surfaces with a coarse brush if residue remains.A stiff-bristled brush will work best as you scrub the area. Keep the affected area dry as you scrape the salt and residue away. After using the brush, wipe away any remainder with a wet sponge or cloth.
    • Brush away outdoor efflorescence on a warm, dry day.
  3. Use pressurized water if the efflorescence is outdoors.Either a pressure washer or a power washer hose attachment will work. Hold the nozzle 1 foot (0.30 m) from the ground as you spray, moving it in short side-to-side movements until the efflorescence is gone.
    • Since most of the salts would be water-soluble, dry the area or use a wet vacuum to remove the standing water.
  4. Clean the efflorescence with a chemical cleaner as a last resort.A stronger acid, like muriatic acid, may be necessary if efflorescence is persistent. Follow the mixing directions on the bottle to make an acid solution.Presoak the wall with water before application. Let the acid sit for 5 minutes before brushing the efflorescence away.
    • Use fresh water to rinse away the acid solution when you are finished.
    • Wear rubber gloves, safety glasses, and protective clothes like aprons while applying the acid solution.

Preventing Efflorescence

  1. Store your masonry materials off the ground.Many building materials are porous and will absorb water if they are left sitting on the ground. Store bricks or cement on pallets and cover them with a waterproof tarp at the end of each night.
  2. Implement overhangs, copings, and flashings to minimize water absorption.Including these into the structure you’re building will help prevent water from entering the material when it rains.
    • Overhangs extend over a wall so rainwater does not come into contact with the wall.
    • Copings are slanted caps on top of walls so water does not rest on the flat surface.
    • Flashings are like gutters and divert the water in a different direction than the masonry.
  3. Install a plastic sheet in-ground to prevent moisture.Form a capillary break between the soil and your building material, either as a sheet of polyethylene or as liquid-applied waterproofing.Capillary breaks are usually installed during the initial building process and may be difficult to add afterward.
  4. Point sprinklers away from walls.Keep water away from an area that may be susceptible to efflorescence.If you have plants next to a porous wall, use a hose and water them directly rather than setting up a sprinkler.

Sealing Concrete

  1. Purchase a silicate-based concrete sealer.Silicate sealers soak into the concrete and create a hard barrier that is waterproof. They can be painted over once they have dried. You can find these sealants at big box home care stores.
    • Silicate-based sealers do not work on walls or areas that have already been treated or painted over.
  2. Wait until the concrete has cured for 30 days.If you are planning on sealing new concrete, wait until it has cured fully, which usually takes around 4 weeks.Silicate and siliconate sealers can be applied as soon as the concrete can support your weight.
  3. Apply when temperatures are between 50 °F (10 °C) or 90 °F (32 °C).Check the label on the product to determine the temperature range when it should be applied. If the temperature is hotter than listed, the sealer may crack or bubble, making it less effective.
    • If applying the sealer outdoors, check the weather to make sure rain is not expected for the next 24 hours.
  4. Use a paint roller or pump sprayer.If you’re covering a large area, a sprayer is suggested. Otherwise, use a paint roller with ¼ in to ⅜ in (6.35 mm to 9.5 mm) nap.
  5. Apply 2 thin coats of the sealer to the concrete.Allow the first layer of sealer to dry for 2 to 4 hours before applying the second coat. The second coat should be applied in an opposite direction, or perpendicular, to how you put on the first coat.
    • Avoid using too much sealer on one coat or else you will have puddles and bubbling.
  6. Allow the sealant to dry for up to 3 days.Try your best to avoid foot or vehicle traffic over your freshly sealed concrete. Areas with heavy traffic should be given the most time, about 3 days, to set before they are walked on again.

Video: What Is Efflorescence? How to Remove It? How To Prevent It?

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Date: 12.12.2018, 18:48 / Views: 93532