Réparer une fenêtre Velux qui fuit et pourrit le cadre

Table of Contents

1. Introduction
2. Signs of Leaky Velux Windows
   • 2.1 Water Ingress
   • 2.2 Rot in the Wooden Frame
3. Factors Contributing to Window Leakage
   • 3.1 Age of the Windows
   • 3.2 Pitch of the Roof
   • 3.3 Correct Flashing Kit
   • 3.4 Installation According to Manufacturer's Instructions
4. Identifying the Cause of Leakage
   • 4.1 Observing the Window During Rain
   • 4.2 Checking for Drips on the Wooden Frame
   • 4.3 Locating the Joint in the Wooden Framework
   • 4.4 Examining the Glazing Profile
5. Fixing the Leaky Velux Window
   • 5.1 Removing the Glazing Bead
   • 5.2 Cleaning and Preparing the Surfaces
   • 5.3 Applying Silicone Sealant
   • 5.4 Reassembling the Window
6. Testing the Fixed Window
   • 6.1 Weathering Storms
   • 6.2 Checking for Dryness

🚪 Troubleshooting a Leaky Velux Window: Causes and Solutions

Do you have a Velux window that is leaking and causing rot in the wooden frame? Leaky windows can be a frustrating and damaging problem to deal with. In this article, we will explore the possible reasons behind a leaky Velux window and guide you through the process of fixing it. So, let's dive in and find a solution to keep your window watertight and your home protected.

1. Introduction

Having a leaky Velux window can lead to water ingress, which not only causes damage to your window frame but can also result in expensive repairs. It is essential to address the issue promptly to prevent further deterioration and potential mold growth. In this comprehensive guide, we will discuss the signs of a leaky Velux window, examine the factors contributing to the leakage, identify the cause of the problem, explain the steps to fix it, and test the effectiveness of the solution.

2. Signs of Leaky Velux Windows

Before we dive deeper into the causes and solutions, let's first familiarize ourselves with the signs that indicate a Velux window is leaking. By recognizing these signs early on, you can take proactive steps to address the issue and prevent further damage.

2.1 Water Ingress

One of the most obvious signs of a leaky Velux window is water ingress. If you notice water running down the plaster or collecting on the window ledge during rainy weather, it is a clear indication that there is a leakage problem. Water ingress not only damages the window frame but can also lead to structural issues if left unattended.

2.2 Rot in the Wooden Frame

Another sign of a leaky Velux window is the appearance of rot in the bottom corner of the wooden frame. If water seeps into the frame, it can cause the wood to deteriorate over time. This can weaken the structural integrity of the window and potentially lead to further leakage and damage.

3. Factors Contributing to Window Leakage

To understand why your Velux window may be leaking, it is essential to consider several factors that contribute to window leakage. Let's delve into these factors to gain a better understanding.

3.1 Age of the Windows

The age of your Velux windows can significantly impact their performance and susceptibility to leakage. Older windows may develop wear and tear over time, compromising their ability to remain watertight. Therefore, it is crucial to inspect older windows more carefully for signs of leakage.

3.2 Pitch of the Roof

The angle of your roof plays a crucial role in whether your Velux window is prone to leakage. A shallower pitch may not provide sufficient protection against driving rain, increasing the likelihood of water seepage. Understanding the pitch of your roof helps determine the potential risk of leakage.

3.3 Correct Flashing Kit

Using the correct flashing kit during window installation is vital for ensuring a watertight seal. Proper flashing helps divert water away from vulnerable areas and prevents it from entering the building. However, even with the correct flashing kit, other factors may contribute to leakage, as we will discuss further in this article.

3.4 Installation According to Manufacturer's Instructions

Proper installation according to the manufacturer's instructions is crucial to preventing window leakage. Incorrect installation can result in gaps or inadequate sealing, allowing water to enter the window frame. It is essential to follow the recommended procedures during installation to minimize the risk of leakage.

4. Identifying the Cause of Leakage

To solve the problem of a leaky Velux window, it is essential to identify the exact cause of the leakage. By pinpointing the source of the problem, you can focus your efforts on addressing it effectively. Let's explore the steps to identify the cause of the leakage.

4.1 Observing the Window During Rain

During a rainy spell, observe the window closely to determine the exact location of water entry. Look for any signs of water accumulation, such as water running down the plaster or pooling on the window ledge. This observation will help you narrow down the possible areas of leakage.

4.2 Checking for Drips on the Wooden Frame

Inspect the interior of the window frame for any noticeable drips during rain. Identifying the position from which the drips fall can provide valuable insight into the location of the leakage. Remember to conduct this inspection while it is raining to observe the real-time behavior of the window.

4.3 Locating the Joint in the Wooden Framework

Once you have identified the area from which the water is entering, focus on the joint in the wooden framework. Water often penetrates through gaps or weak spots in the joint, leading to leakage. Examine the joint carefully for any visible signs of damage or degradation.

4.4 Examining the Glazing Profile

Pay close attention to the glazing profile, which consists of the bottom capping profile and the side glazing profile holding the glass unit in place. Water can enter the joint between these two profiles, compromising the window's watertightness. Check for any signs of poor sealing or degradation in the glazing profile.

5. Fixing the Leaky Velux Window

Now that you have identified the cause of the leaky Velux window, it's time to take action and fix the problem. Follow these step-by-step instructions to repair the window and restore its ability to resist water ingress.

5.1 Removing the Glazing Bead

To access the joint between the glazing profile and the bottom capping profile, you will need to remove the glazing bead. Carefully open the window and remove the screws holding the glazing bead in place. Take caution not to damage the surrounding components during this process.

5.2 Cleaning and Preparing the Surfaces

Once the glazing bead is removed, thoroughly clean the surfaces to ensure optimal adhesion of the new sealant. Use a scraper and white spirit to remove any old sealant or debris. Take extra care to clean both the glazing profile and the glass surface for maximum effectiveness.

5.3 Applying Silicone Sealant

With the surfaces cleaned and prepared, apply a generous bead of silicone sealant to the joint between the glazing profile and the bottom capping profile. Silicone sealant is an excellent choice due to its high-temperature resistance and durability. Ensure to apply the sealant evenly and cover all vulnerable areas, especially the bottom corners.

5.4 Reassembling the Window

After applying the sealant, carefully reassemble the window by securing the glazing bead back in place with screws. Apply a small amount of sealant under each screw head to provide an additional layer of protection against water ingress. Take care not to overtighten the screws and risk damaging the components.

6. Testing the Fixed Window

Now that you have successfully repaired the leaky Velux window, it is essential to test its effectiveness. Subject the window to challenging weather conditions, such as storms, to ensure that it remains completely dry. By thoroughly testing the window, you can gain confidence in its ability to resist leakage.

6.1 Weathering Storms

Expose the fixed window to severe weather conditions, including heavy rain and strong winds. Monitor the window closely for any signs of leakage or water ingress. If the window remains dry and watertight, you can be confident that the repair has effectively solved the problem.

6.2 Checking for Dryness

Regularly inspect the window after rainfall to ensure that it remains dry. Check for any water accumulation on the window ledge and observe the interior of the window for any signs of leakage. By maintaining a vigilant approach, you can promptly address any potential issues and ensure the long-term effectiveness of the repair.

In conclusion, a leaky Velux window can lead to significant damage if not addressed promptly and effectively. By following the steps outlined in this guide, you can identify the cause of the leakage, fix the problem, and test the repaired window to ensure its watertightness. Remember to prioritize regular maintenance and inspection to prevent future leakages and prolong the lifespan of your Velux windows.