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Common Causes of Window Leaks and Door Leaks

Category: Blog, Tips and Tutorials

Winter is coming. Rain on window.

Are you worried your windows or doors are leaking?

Window leaks and door leaks may be caused by an issue with window installation or home design, as a result of extreme weather conditions or insufficient cleaning and maintenance. Let’s take a closer look at these common causes of window leaks and door leaks.

Installation

Some installation issues that can cause window leaks and door leaks include:

  • Unsupported Sills The most common cause of installation leaks in sliding doors and windows are unsupported sills. This is difficult to repair once the flooring has been installed and a service technician must assess on a case by case basis. Unsupported sills can also lead to separation of mullion blocks and create an entry point for water.
  • Covered Weep Holes When flooring is installed above weep holes, water will gather in sills and tracks and the water will be unable to drain away.
  • Aftermarket Security Screens If non-Jason Windows security products have been installed on your Jason frames it is possible they are compromising the drainage system. Some aftermarket security screens don’t take the drainage system into account and block the water from draining out.
ensure weep holes have clearance (e.g. door tracks are not installed flush with floor without adequate drainage)

Ensure weep holes have clearance (e.g. door tracks are not installed flush with floor without adequate drainage)

Jason Windows security screens are designed to fit Jason windows and doors without blocking weep holes. Some aftermarket security screens block the drainage system.

Jason Windows security screens are designed to fit Jason windows and doors without blocking weep holes. Some aftermarket security screens block the drainage system.

Home Design

Some design factors that can cause window leaks and door leaks include:

  • Angled fascia board above windows need to be angled outward to direct water away from the window.
  • Complex window designs and house orientation need to be taken into consideration as potential leak points.
  • Lack of overhangs to drain water off the roof and protect wind-driven rainwater from entering through the windows.

Overall does the house design minimise window and door exposure?

Minimal overhangs can leave windows exposed to wind-driven rain.

Minimal overhangs can leave windows exposed to wind-driven rain.

Complex window designs create potential leak points.

Complex window designs create potential leak points.

Environmental Factors

Some window and door leaks can be caused by environmental factors, such as:

  • Changing weather patterns. Modern windows and door are designed to suit our current weather conditions – however, older windows from 10, 20, 30 plus years ago were made for the known weather conditions of the time. With the occurrence of stronger weather patterns being a reality older windows and doors were just not designed for the increasing strength in weather. Sometimes our service technicians are able to reseal windows and doors making them water and air tight – if windows are unable to be resealed or modified they will need to be replaced with a higher rated product for today’s weather conditions.
  • Storms and Extreme Weather Conditions. The combination of extreme winds and high rainfall to exposed windows and doors can exceed the products drainage system. Water can be forced in through the drainage holes (sometimes in spitting form) and sit in sills and tracks. When this occurs the volume of water coming in exceeds the volume of water going out. These sills and tracks are designed to hold the water and then drain/evaporate away.

If you have exposed windows or doors and are in an area that experiences storms and extreme weather conditions often, consider maintaining your tracks and sills more often than the recommended period to keep drainage holes free of debris, or get in touch to request a service technician to attend and assess whether any product modifications can be made to improve drainage.

Maintenance

It’s very important to regularly clean window and door tracks. Without sufficient cleaning these can fill up with dirt, pet hair and bugs, blocking weep holes. Cleaning tracks will also help prolong the life of other moving parts, such as keeping rollers intact.

Windows and door tracks should be cleaned regularly to avoid blocking the drainage system with pet hair, dirt, leaf litter and other obstructions.

Windows and door tracks should be cleaned regularly to avoid blocking the drainage system with pet hair, dirt, leaf litter and other obstructions.

If you are concerned about window leaks or door leaks, please use this tool to identify where the leak is coming from and take a photo or video to help our service team diagnose the problem.

 

Further Reading: Pre-Winter Checklist

About the Author

Dempsey O'Callaghan - Service Manager

Dempsey O'Callaghan is the Service Manager at Jason Windows. Our Servicing and Spare Parts Team include 13 specialised Service Technicians fully trained on over 150 unique service tasks which may arise in the course of their day. It takes several years to master all of the facets of our Service Technician roles and many of our Service Technicians are also qualified glaziers. Our Servicing Support Team work behind the scenes to ensure that an average of 100 jobs are booked in and scheduled each day.


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