Waterproofing a bathroom window is essential when it’s positioned in the shower area. Helping prevent water damage in the long term, this task also ensures a leak-free shower experience. 
For many homeowners, the ongoing job of dealing with water leaks around the bathroom window every time they take a shower is tiresome. Yet, this is one bathroom task that can’t be ignored if this area is to be properly protected.
Fortunately, The  Bathroom Showroom can help you properly waterproof your bathroom window and keep your bathroom dry and well-maintained in the process. 

Why Do Showers Have Windows?

Many bathrooms have a window in the shower and the reason why dates back some time. Originally it was commonplace to have a bath in the bathroom, as opposed to a shower. This meant that many windows were installed in this room above the bath area. 
The reason for inserting a window here was simply because it was deemed that when using the bath you wouldn't be able to splash water over the height of the bathtub itself! So, having a window above this bathroom fixture then made perfect sense. 
Yet, as times, trends, and indeed schedules changed and we became busier as a whole, showers began to take centre stage in this room. So, many homeowners placed their shower enclosure and shower in this area, either removing the bathtub or replacing it altogether. Yet, though most shower areas are tiled or wall-panelled, the window remains a water-sensitive fixture. 

Waterproofing a Bathroom Window: Why It's Important

Water leaks around a bathroom window can lead to serious water damage, including mould growth, structural damage, and costly repairs. By waterproofing your bathroom window, you can prevent these issues and maintain the integrity of your bathroom for years to come. So, as well as keeping your bathroom dry, how can you effectively waterproof your bathroom window to ensure a leak-free shower experience?

Expert Tips for Waterproofing Your Bathroom Window

  • Choose the Right Waterproofing Material: When it comes to waterproofing a bathroom window, selecting the right material is crucial. Look for waterproofing products specifically designed for windows and follow the manufacturer's instructions for application.
  • Inspect and Repair Any Damage: Before applying waterproofing products, make sure to inspect your bathroom window for any signs of damage or deterioration. Repair any cracks, gaps, or holes to ensure a secure seal.
  • Apply Waterproof Sealant: Use a high-quality waterproof sealant to seal the edges and seams around your bathroom window. Pay special attention to the areas where the window frame meets the wall and where the glass meets the frame.
  • Install a Waterproof Membrane: Consider installing a waterproof membrane around your bathroom window for an extra layer of protection. This membrane acts as a barrier against water infiltration and helps prevent leaks.
  • Check for Proper Drainage: Ensure that your bathroom window has proper drainage to allow water to flow away from the window and not pool around it. Installing a drip cap or a sloped windowsill can help redirect water away from the window.
  • Regular Maintenance: To maintain the effectiveness of your waterproofing efforts, regularly inspect and maintain your bathroom window. Check for any signs of wear or damage and reapply waterproofing products as needed.


Q: How Can I Tell if My Bathroom Window Is Not Properly Waterproofed?
A: Signs of inadequate waterproofing include mould or mildew growth, water stains on the wall or ceiling, and a musty odour in the bathroom.
 Q: Can I Use Regular Caulk to Waterproof My Bathroom Window?
A: While regular caulk can provide some level of waterproofing, it's best to use a specialised waterproof sealant for optimum protection.

Promote a Healthier-looking Looking Bathroom Space

By following these expert tips for waterproofing your bathroom window, you can prevent water leaks and ensure a leak-free shower experience. Remember to choose the right waterproofing materials, inspect and repair any damage, and maintain your bathroom window regularly. With proper waterproofing, you can enjoy a dry and well-maintained bathroom for years to come.
For further help and advice in and around the bathroom, take a look at both our Blog and Rest & Relaxation section.
If you’re looking to create a healthy space, book an appointment with The Bathroom Showroom. Experts in all things bathrooms, we can help turn your dream bathroom into a reality.