|
Exterior Paint Problem Solver
| Back to Problem Solver Menu |
Efflorescence/ Mottling
|
 |
Crusty, white salt deposits, leached from mortar or masonry as water passes through it.
Possible Cause:
Failure to adequately prepare surface by removing all previous efflorescence.
Excess moisture escaping through the exterior masonry walls from the inside.
Solution:
If excess moisture is the cause, eliminate the source by repairing the roof, cleaning out gutters and downspouts, and sealing any cracks in the masonry with a high quality, water-based, all-acrylic or other paintable caulk.
If moist air is originating inside the building, consider installing vents or exhaust fans, especially in the kitchen, bathroom and laundry areas. A moisture-barrier paint might also be considered for the exterior wall.
Remove the efflorescence and all other loose material with a wire brush, power brush or power washer; then thoroughly rinse the surface.
Apply a quality primer and sealer and allow it to dry completely, then apply an exterior masonry paint.
|
Back to Problem Solver Menu
|
|
