Posts Tagged ‘siding’

Mildew on Wall Indicates Moisture Problem – Somewhere

October 9, 2018


I have just stripped off a solid vinyl wallcovering that had been up for at least 10 years, possibly twice that. The entire wall was covered with mildew. The mildew was present just on the exterior wall; not any of the walls that connected to interior areas of the home.

Mildew breeds when there is moisture. This indicates that there may be a leak in the home’s siding, or a leak in a window on an upper floor allowing water to get inside the wall and into the drywall. Another possibility is that plumbing inside the wall could have sprung a leak, and also caused the drywall to become wet.

Because the wallcovering was solid vinyl, it trapped the moisture between the wall and the wallpaper, and that allowed mildew to grow between the two surfaces. I’m rather surprised that the mildew didn’t penetrate through the wallpaper and show on the surface. The drywall didn’t appear to be soggy or rotted or compromised.

Another reason why I don’t like solid vinyl wallpapers.

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