The short answer
How to Check Under the Paper
To confirm mold, you need to look under the wallpaper. Start by picking a corner or seam and carefully peel it back a few inches. Wear gloves and a mask to avoid touching or breathing in any mold spores.
If you see dark spots, fuzzy growth, or a slimy texture, that is mold. You may also notice water stains or rotting drywall underneath. If the area is dry and clean, the problem may be elsewhere.
After checking, press the paper back into place if no mold is found. If mold is present, stop and do not disturb it further. Disturbing mold can release spores into the air, which can affect your health.
- Wear gloves and a mask before peeling
- Peel back a corner or seam slowly
- Look for dark spots or fuzzy growth
- Check for water stains or soft drywall
- Do not disturb mold if you find it
What to Do If You Find Mold
If you find mold behind your wallpaper, the first step is to find and stop the moisture source. This could be a leaky pipe, a roof leak, or condensation from high humidity. Fixing the source is essential, or the mold will return.
You may need to remove the affected wallpaper and dry the wall thoroughly. In some cases, the drywall underneath may be damaged and need replacement. A water damage professional can assess the extent of the damage and recommend the right approach.
For small areas, you might be able to clean the surface with a mold cleaner, but porous materials like drywall often need to be cut out. If the mold covers a large area or you have health concerns, contact a professional for help.
Preventing Mold Behind Wallpaper
Prevention starts with controlling moisture in your home. Use exhaust fans in bathrooms and kitchens, and consider a dehumidifier in damp areas. Keep indoor humidity below 50 percent if possible.
Inspect your home for leaks regularly, especially after heavy rain or snow. Check around windows, doors, and roof penetrations. If you live in Layton, keep an eye on areas where plumbing runs through walls.
When hanging new wallpaper, use a moisture-resistant adhesive and ensure the wall is completely dry first. Avoid wallpapering over existing wallpaper if there is any sign of past water damage. Use a primer designed to block stains.
When to Call the Pros
Some mold problems are too large or risky for a homeowner to handle alone. If the mold covers more than a few square feet, or if you or your family experience respiratory issues, it is time to call in help.
Local water damage pros can identify the moisture source and remove mold safely. They have the equipment to dry out walls and the experience to know what needs to be replaced. They can also help with structural drying and dehumidification after the mold is gone.
If you notice extensive water damage or if the wallpaper covers a large area, a professional inspection can give you a clear picture. They can also help with moisture mapping to find all affected areas, not just the visible ones.
Policies vary, and your insurer decides what is covered. Check your policy to see if mold damage is included. If you have concerns, talk to your insurance company before starting any work.
- Mold covers more than a few square feet
- You or family members feel unwell
- The moisture source is unknown
- Water damage has affected the drywall
- You need help with drying and cleanup
Need help right now?
Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (801) 383-0232Frequently asked questions
Can mold behind wallpaper make you sick?
Yes, mold can cause respiratory problems, allergies, and other health issues. If you notice a musty smell or see signs of mold, address it promptly. See a doctor if you feel unwell.
How long does it take for mold to grow behind wallpaper?
Mold can start growing within 24 to 48 hours in the right conditions, such as warm and damp areas. If there is a water leak behind your wallpaper, mold can develop quickly. Act fast if you suspect moisture.
Can I just paint over mold behind wallpaper?
Painting over mold does not solve the problem. The mold will continue to grow and can spread through the paint. You need to remove the mold and fix the moisture source first, then repaint.