Mould can get everywhere, and it's not uncommon to find it creeping onto your wallpaper. When you spot mould on wallpaper, you need to deal with it quickly as the longer you leave it, the more likely it is to ruin your wallpaper.
As tearing down your beautiful designer or painted wallpaper is usually a last resort – and a route most people would like to avoid – here we look at the ways you can remove mould on wallpaper to help save, and restore your wallpaper to its original condition.
However, make sure to address the cause of the problem; otherwise, the mould will keep coming back.
Causes of mould on wallpaper
The causes of mould on wallpaper tend to be the same as those behind mould on windows, walls, ceilings and pretty much anywhere else in the home. These are:
- Excess humidity
- Poor ventilation
- Dirt
- Water ingress
- The use of inappropriate materials such as cement-based plasters in old houses
"Some types of mould are related to too much humidity in the air, whilst others are related to water ingress – perhaps from loose roof tiles, a leaking pipe, ground water or poorly fitting window frames," advises Chris Michael of Meaco.
"Condensation is a sign that your home may be susceptible to damp," he adds, "and you may need to look at ways to improve your home ventilation, and invest in some repairs."
However, one thing is clear and that is whatever the cause, like removing mould from walls, you should always remove it. But, there are a number of methods for doing so.
Chris and his partner Michelle started Meaco in 1991. Meaco is now regarded internationally as a major player in the dehumidifier industry selling to 20+ countries throughout Europe, North America and South Africa.
Ways to remove mould on wallpaper
Steve Jenkins, DIY expert, explains how different solutions are needed depending on each scenario.
“The wallpaper type combined with the level of mould will help determine which is the best mould removal method,“ he explains. "Some will need a simple natural solution, while others will need a more forceful chemical-based approach.”
Before trying out any of the following methods, it is crucial that you dust or vacuum the wall first. Failing to do this will mean that any cobwebs, dirt, or dust will spread over the wall during cleaning.
Whatever method you choose, it is also advisable to test it on a small, inconspicuous area of the wall first to make sure you won't discolour or tear the paper.
1. Natural ways to remove mould from wallpaper
There are several natural, homemade solutions you can try to remove mould from wallpaper. These are cheaper and safer than those that contain chemicals, but not always as effective on stubborn stains.
For example, “if you are dealing with washable wallpaper, you can go with a simple solution, such as washing up liquid and warm water,” says Steve Jenkins, adding that the same applies for emulsioned wallpaper.
“But, washing mould off emulsioned wallpaper can leave noticeable patches," he warns, "especially if cleaning a matt paint, and there is a lot of scrubbing involved.”
"Another natural option is to combine one cup of water with half a cup of distilled white vinegar, or mix one cup of water with a couple of drops of tea tree oil (this can be toxic to pets, so use it away from them).
“Add the solution to a spray bottle and mist the affected area. Now use a sponge to carefully wipe the walls in circular motions, avoiding soaking the wallpaper," he explains. "Use a clean, damp sponge to remove the solution, then let it air dry before repeating the process until the mould is eliminated.”
This is a good, gentle approach for those looking at how to remove mould from walls without damaging paint.
2. Use bleach solution to remove mould
Household bleach can be a lifesaver for removing all kinds of pesky stains – mould and mildew included.
Try combining a quarter cup of bleach with one cup of water. Lightly spray or sponge the solution onto the stains, then leave it to work for about 5 minutes. You can then wipe it away with a clean cloth or sponge, repeating the process carefully until the stains have disappeared.
Try these products to help remove and cover mould stains
The white primer/undercoat provides excellent coverage. It effectively seals surfaces and enhances the finish ensuring a smooth and even base for a top coat.
This concentrated silicate-free powder is ideal for removing grease, grime and nicotine from painted surfaces ready for a new coat of paint. Mix with water to get the required strength.
5 x 750ml spray bottles to tackle a host of DIY jobs including spraying a solution onto mould any where in the home. Includes a measuring gauge and adjustable nozzle.
3. Invest in a professional mould-removal product
There are several products out there designed to remove mould from all kinds of surfaces, including walls, windows and even those directed at people looking at how to remove black mould from silicone sealant.
It is actually quite rare to find chemical mould removers that state they are suitable for regular wallpaper, although many people do report impressive success using them (myself included!). If you decide to take the risk, then do be sure to try the product out on a small, hidden test area of wallpaper (perhaps behind a wardrobe or similar) before saturating your entire wall with the stuff – and always follow manufacturer's instructions.
You will also need to ensure you ventilate the room well, wear gloves and cover carpets. You might also like to consider wearing a dust mask.
Products that come with some of the best reviews include Dettol Anti-Bacterial Mould and Mildew Remover, as well as HG Mould Remover Spray and Dryzone Mould Remover Scrub-Free Formula, all available from Amazon.
4. Remove the wallpaper and start over
In some cases, no amount of scrubbing will remove the mould stains left behind. Steve Jenkins says, “stains are especially noticeable on light coloured surfaces, and can prove difficult to hide.”
He adds, “if the surface is painted, you can paint over the mould, but remember to use a primer to stop the stain seeping through onto newly emulsioned walls.” If you can’t get rid of the stains, it's time to consider removing the wallpaper and replacing it.
However, make sure you deal with the underlying issue causing the mould. Otherwise it will simply return, and you’ll have the same problem again.
Steven Jenkins is a keen DIYer with over 20 years of experience in transforming and renovating the many homes he has lived in. He specialises in painting and decorating, but has a wide range of skills gleaned from working in the building trade for around 10 years
How to prevent mould on wallpaper returning
Once you have removed the mould from your wallpaper, you will obviously be keen not to repeat the process, so it is crucial that you put measures in place to prevent mould from forming in the first place.
"If you’re finding it difficult to permanently remove mould, you’ll need to look into the root causes," advises Chris Michael. "If there are fundamental problems in your home that are causing mould or mildew, you’ll need to get them sorted out by a professional. This might include damp or problems because of insulation mistakes, or poorly installed kitchen and bathroom fittings."
"On a day-to-day basis," continues Chris, "you can fight the occurrence of mould with better ventilation, the best dehumidifier to keep the air in your rooms less humid, regular cleaning and an eagle eye for the appearance of anything that looks like mould."
In order to prevent mould from rearing its very ugly head again, consider taking the following steps:
- Reduce humidity levels: If you are wondering how to reduce humidity in a house there are a number of simple ways to do so. "You can reduce the moisture in the affected room in a number of ways, including making sure you are ventilating the room properly – open windows when cooking, for example," says Chris Michael
- Keep your home spotless: Mould loves dirt so keeping your home as clean as you possibly can should help in the fight against it and make sure you undertake regular decluttering, particularly in winter
- Fix the causes of damp: Damp leads to mould, so by understanding what causes damp and putting the issues right, your mould problems should also disappear
FAQs
Can I paint over mould on wallpaper?
Once the mould itself has been removed from the wallpaper, you may well find you are left with some pretty unsightly stains. If you are certain that it's only surface mould, consider painting over the wallpaper, if possible, rather than removing it. It's quicker and easier.
However, you need to consider how you paint, says Steve Jenkins. “If the wallpaper has a vinyl finish its not advisable to emulsion straight on top. You will need to prep properly.
"Clean with sugar soap, let the wallpaper dry and then apply an undercoat or primer. Try Zinsser Bulls Eye 1-2-3 Primer-Sealer (available from Amazon) before adding an emulsion.”
Can you buy anti-mould wallpaper?
If you have decided to remove your wallpaper altogether and are ready to start again, you may well be wondering if there are certain products that are less likely to be affected by mould than your old wallpaper.
While there are not too many 'anti-mould' wallpapers out there, for many people, opting for waterproof wallpaper, which is also often billed as kitchen or bathroom wallpaper, is a good idea if you live in a house susceptible to mould, damp and condensation as it is more resistant to moisture and easier to clean than regular or fabric-based papers.
Alternatively (or even as well as) you should seriously consider using a mould resistant wallpaper paste, such as this Solvite All Purpose Wallpaper Adhesive from Amazon.
Getting rid of mould on wallpaper and starting afresh with a new wall finish could be the perfect time to put some of your interior design ideas into action. Check out our best house design ideas, bathroom design ideas and small kitchen ideas to help transform your home.
