Efflorescence Cement Siding

It can happen even though the siding materials have been properly installed.

Efflorescence cement siding.

Causes usually efflorescence is primarily composed of calcium carbonate formed when leached calcium hydroxide ch from within the concrete reacts with carbon dioxide in the atmosphere. Fiber cement efflorescence chalking and fading is not the same thing as efflorescence and the siding is most likely painted not stained. Efflorescence will be triggered by low temperatures humidity condensation and rain. And darks have more room to fade than lighter colors.

It s induced by low temperatures moist conditions condensation rain dew and water added to the surface of fresh concrete to assist troweling. What can be done about it. Efflorescence is a naturally occurring white powdery deposit that can appear on cement based building materials. If efflorescence occurs it can be remedied with.

Different qualities of paint will fade at different rates. Once inside the water dissolves salts and other minerals in the substrate. The stains are normally white and are present in darker colors more than white or pale colors due to the contrast created by the chemical reaction. It is the result of a process in which moisture draws salt crystals to the surface evaporates and leaves a chalky substance behind.

Efflorescence can form a thick layer on the surface which can completely hide the concrete s color or as in your case create unsightly white patches. Paint pigments will fade with sun exposure. Concrete can be stained when salts and other materials will come off the concrete surface. On a home efflorescence occurs when fiber cement siding absorbs moisture whether from being uncovered prior to installation or from excess moisture entering through the back side of the substrate.

Efflorescence in concrete is a whitish coloured powdered deposition of salts on the concrete surface that is formed due to evaporation of water from the concrete. Efflorescence is caused when soluble salts and other water dispersible materials come to the surface of concrete and mortars. Efflorescence is a naturally occurring white powdery deposit that can appear on cement based building materials including bricks cement walls grout and fiber cement. It is caused when water soluble salts are present in the concrete material which comes on to the surface while evaporation of water from the concrete.

It is the result of a process in which moisture draws salt crystals to the surface evaporates and leaves a chalky substance behind. To recap efflorescence is the result of a natural process that can occur in cement based materials. While not considered a warranty issue for these reasons certainteed is still concerned with your ultimate satisfaction. Sometimes over time efflorescence can appear on fiber cement siding.