Black Mould on Windows: A Guide to Removal & Prevention

Black mould on windows around your home is the last thing you want to see. It can not only damage your windows but also cause serious health problems.

Here's how to get rid of mould around windows:

Read on to find out why black mould appears around windows, what you can do to get rid of it, and how you can prevent it from appearing again.

To begin with, if your windows are especially old, then they may be prone to letting mould spread in your home. Therefore, it may be time to replace your windows. To help you with this, GreenMatch can offer you up to 4 exclusive quotes from some of the best installers in your local area.

Rather than spending much time and effort finding installers by yourself, use GreenMatch's free, no obligation quotes service. Get started today by clicking the button below.

Any kind of mould is bad for the overall health of anyone living with it, but black mould is especially concerning. This type of mould is known as 'Stachybotrys Chartarum' and is known to form where there are excessive amounts of moisture in the air.

Black mould is known to produce a damp smell and can spread across paint, wallpaper and plaster, with the potential to cause serious problems with respiratory health.

It's important that you don't ignore even the slightest sign of black mould around your windows, or anywhere else in the home for that matter.

Some common causes of black mould in households are:

Mould can be very harmful to your physical and mental health, particularly if you already suffer from asthma, eczema or respiratory infections.

Mould spored release toxins, known as mycotoxins, which when breathed in can cause damage to lungs, skin and the nervous system. As well as those who already suffer from respiratory or skin problem, those most susceptible to the effects of mould are babies, children and the elderly.

There are 2 leading contributors to black mould forming around windows or on window sills: leaks and condensation.

If water is leaking from the outside onto the window sill, then it's likely that the window frame is damaged and needs repairing or replacing altogether. When it comes to condensation, it's all about reducing the amount of moisture in the air around your home, and there are several things you can do:

So, whether you've discovered black mould around uPVC, timber or aluminium windows, by adopting the above advice, you'll greatly reduce the risk of mould returning to the area.

In the case that mould has caused too much damage to your windows, then the best solution may be to replace your windows. Finding the best installers for the job and requesting their quotes can be a time consuming task. That is, unless you do it with GreenMatch.

We can provide you with up to 4 quotes from top-rated installers in your area. You can then compare their quotes to find a good deal. Our service is free and comes with no obligations.

Before looking to remove the mould, you should find the cause as it will only keep coming back otherwise. When it comes to black mould around windows, a common cause is damage to the frame.

You should contact a professional to either repair the window frame or carry out a replacement, depending on how severe the case might be.

You can remove mould yourself but the NHS recommend to only do this if the mould covers an area smaller than 1 metre squared. If the mould has spread beyond this or the cause was found to be anything to do with sewage or contaminated water, always contact a professional.

Before starting, protect yourself by wearing goggles, rubber gloves and a mask that goes over your mouth and nose. It's also a good idea to open up the windows for ventilation but keep doors closed to prevent spreading.

What you'll need: A bucket, washing up liquid, rubber gloves, goggles, a mask, 2 rags, a plastic bag and either cleaning wipes or a hoover.

Step 1: Fill a bucket with water and washing up liquid
Step 2: Dip a rag into the soapy water and wipe. Don't brush the mould around as this will cause it to spread.
Step 3: Once removed, use the dry rag to wipe the damp area of the wall and remove any moisture.
Step 4: Throw both rags away.
Step 5: Wipe down or hoover the surface where the mould had been.

If there were any clothes or soft furnishings in the area where the mould had spread, then you should put them into a plastic bag and take them to be professionally dry cleaned or throw them away if you'd rather.

When aiming to get rid of mould around your windows using vinegar, you should always wear gloves to avoid irritation.

Step 1: Fill a spray bottle with white vinegar. Alternatively, wet a cloth with the vinegar and wipe.
Step 2: Thoroughly spray the vinegar over the mould.
Step 3: The vinegar needs time to break up the mould so leave if for 1 hour.
Step 5: Use a scrubbing brush and warm water to scrub away the mould.
Step 6: Wipe the surface down using warm water and leave the area to dry out.

If the mould reappears, try the whole process again. You might also want to combine vinegar with other products such as baking soda or salt to increase your chances of successful black mould removal.

Mould on a wooden window frame can gradually lead to it deteriorating. Wood holds onto moisture, making it the ideal material for black mould to form and grow.

To combat this, you might want to consider painting or staining the wooden frames and giving the joints of the frames a good clean to ensure they're free from dust and moisture.

If you notice mould around the window seal you can first try cleaning the affected area. If this doesn’t work you’ll need to completely remove it and then reapply new sealant. This is important because if cleaning the sealant doesn’t work, reapplying it will be the only thing that will deal with the root cause of the window mould, which if not resolved can lead to more serious problems further down the line.

If you’ve cleaning the sealant and window frame but see even the slightest sign the mould is returning, you will need to remove and replace the sealant completely. This isn’t as hard as you may think and will be the best option when it comes to preventing any mould around windows from forming in the future.

If one or more of the windows around your home are letting in moisture that keeps leading to mould then you should hire a professional to repair or replace them.

Complete our simple online form with details of the work you need and we'll put you in touch with trusted window installers in your local area. You'll be contacted by up to 4 installers who will each provide a quote for the work you outlined in the form. This allows you to compare the quotes and give you the greatest chance of finding the best deal for your home.