Efflorescence is common with most types of concrete, stucco and masonry. These materials are very porous and will absorb any moisture in which they come into contact. This has been a problem for fiber cement siding manufacturers for many years. Unlike fiber cement, engineered wood siding will not effloresce.
Efflorescence is a chemical action that discolors stucco, concrete and fiber cement products. These products can contain salts and other minerals. Fiber cement can absorb moisture if not well covered before installation. Excess moisture can also penetrate the backside of the substrate. The water from such moisture dissolves salts inside the fiber cement.
How It Forms
This problem usually happens when siding gets heated by the sun. Moisture leaches to the surface and evaporates, leaving behind crusty, white salt deposits. Although harmless to fiber cement siding, they are ugly and can be difficult to remove.
Removal of efflorescence is time-consuming and labor-intensive. Try pressure-washing or applying an acid wash to the surface. When using acid products, repeating the process may be necessary for full removal. With water, the siding can reabsorb the salts reappearing later as more efflorescence.
Preferable to Fiber Cement
LP® SmartSide® engineered wood siding contains no natural salts and minerals. They will not effloresce so you never have to worry about the ugly discoloration of your siding. LP SmartSide also features lines and textures that recreate the look of real wood. It comes in a choice of profiles, including lap, panel, cedar texture shakes and shingles. It’s your best choice for beautiful curb appeal and easy maintenance.
Count on Krech Exteriors for all things siding and roofing. We are the area’s leading certified source for LP SmartSide engineered wood siding. Minneapolis and St. Paul homeowners turn to us for their home improvement needs. Give us a call at (651) 688-6368, and set up your FREE in-home consultation.