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Efflorescence on fiber cement siding.
Paint pigments will fade with sun exposure.
Fiber cement efflorescence chalking and fading is not the same thing as efflorescence and the siding is most likely painted not stained.
Properly installed and maintained fiber cement is an excellent choice offering realistic wood looks.
It s also good to know efflorescence does not harm fiber cement siding structurally nor is the siding hurt by proper surface cleaning.
Regardless if your fiber cement siding clad home is 10 15 years or older it s time to repaint but one thing will need to be dealt with first if your siding has a chalk like substance on it.
This substance is called efflorescence.
Actually everything fades with sun exposure.
And darks have more room to fade than lighter colors.
Read our latest siding blog post.
Once inside the water dissolves salts and other minerals in the substrate.
Efflorescence and how it affects siding.
Different qualities of paint will fade at different rates.
If efflorescence occurs it can be remedied with the techniques previously described.