Posts Tagged ‘dampness’

Killing Mildew

November 2, 2017

Digital Image

Digital Image

Yeowee … this wall has a lot of issues with torn Sheetrock (the dark brown areas), but more important – the black stuff that you see in the top photo is mildew.  Not good.  Mildew is a living organism, and it can grow and grow.  It’s powdery, and so as it spreads across the wall, it can separate from the wall (delaminate), which means that the wallpaper is at risk of falling off the wall.  Mildew can also travel right through wallpaper, creating a ghost-like shadow of dark – or sometime pink – discoloration.

Mildew is usually caused by moisture.  It’s not clear what caused the problem in this powder room in a 1957 home in the Tanglewood area of Houston.  It could be a leak in the wall (pipe, window, roof, lawn sprinkler outside hitting the wall).  Or it could be that the solid vinyl surface of the previous wallpaper prevented air from getting to the backing, and so that it could not dry out, and then it held dampness against the wall – which created the perfect breeding ground for mildew.

Getting rid of mildew requires a few steps.  First, it must be wiped and scrubbed with chlorine bleach, then rinsed clean.  Once the wall is dry, a coat of a quality stain-blocker is applied.  I like oil-based KILZ Original, but other options include Zinsser’s B-I-N stain blocker.

Once the stain blocker is dry, the wall can be coated in a wallpaper primer.

Stupid, Unresearched, and Misleading News Article About Wallpaper

June 29, 2017

A spot with this information (click link below) aired on the local news Monday, and since then it has popped up on news and information sites on the Internet. Like many such “news” stories, it is all sensation and no honest information.

The article purports that “wallpaper can make you sick.” However, what it really should say is that MOLD in the air can make you sick. The article tosses out this scary claim, but makes no explanation of what kind of wallpaper might be involved, what the conditions of the room are, what connection mold has with wallpaper, how common this situation is. I will give them credit for listing a (scant) few other possible causes of mold in a building.

Here are a few true facts that the reporter should have dug up and included in her story. Wallpaper itself does not support the growth of mold. In fact, acrylic-coated papers, pulp papers, non-woven material, and natural fibers (grasscloth) all allow air to pass through them.

Now, it is true that mold can grow behind some solid vinyl wallpapers that are commercial grade (and unlikely to be used in homes), because they don’t breathe. But conditions would have to be right for this to happen – improperly prepped walls, improperly installed wallpaper, humidity or dampness in the building, moisture inside the wall (leak in a pipe or roof), lack of air conditioning / heating, lack of air circulation or ventilation. And usually the mold just sits there. It’s when the wall surface is disturbed (removing old wallpaper) that the mold might be released into the air.

I sure hope that people don’t read the headline or the skimpy story, and fall for its misleading information, and avoid using wallpaper in their homes or offices. The fact is, a good quality wallpaper that is hung properly in a building that is maintained properly will enhance the setting, and give many years of beauty and “clean living.”

Here is the link. http://www.health24.com/Lifestyle/Healthy-workplace/Health-in-the-workplace/your-wallpaper-might-be-making-you-sick-20170626