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Published on December 19, 2023 8:36 AM

Draught-Proofing uPVC Windows: An Essential Guide

At Colin’s Sash Windows we understand that not everyone is in the position to fit new uPVC casement windows or our famous uPVC sash windows. One great option is our range of made to measure secondary glazing. So, we’ve used our expertise to help you keep warm during the winter.

Draught-proofing uPVC windows is a crucial step in improving the energy efficiency and comfort of your home. By effectively sealing gaps and cracks, you can prevent draughts from entering your living space, resulting in reduced heat loss and lower energy bills. This comprehensive guide will equip you with the knowledge and skills needed to draught-proof your uPVC windows successfully.

DIY draught-proofing uPVC windowsImage source: unsplash
One of the key benefits of draught-proofing is enhanced insulation. By using appropriate materials such as silicone sealant, draught excluders, and weatherstripping, you can create a barrier against cold air infiltration. This insulation not only keeps your home warmer but also helps maintain a consistent temperature throughout.

In this guide, we’ll explore different draught-proofing materials and techniques to help you select the most suitable options for your uPVC windows. We’ll also provide step-by-step instructions on how to prepare your windows for draught-proofing, including cleaning them thoroughly and identifying areas that require attention.

By following this essential guide, you’ll gain valuable insights into the importance of draught-proofing uPVC windows and learn how to create a more comfortable and energy-efficient living environment.

Selecting the Perfect Materials for Draught-Proofing

When it comes to draught-proofing uPVC windows, selecting the right materials is essential for achieving effective insulation and long-lasting results. Here’s a closer look at the importance of quality materials and the various options available:

Understanding the Importance of Quality Materials

To ensure successful draught-proofing, it’s crucial to choose materials that are durable, weather-resistant, and capable of providing effective insulation. When selecting materials, consider the specific requirements of uPVC windows. These windows have unique characteristics that require compatible products for optimal performance.

Look for materials that are specifically designed for uPVC window insulation. These materials are often flexible and can withstand temperature changes without losing their effectiveness. They should also be resistant to UV rays and moisture to prevent deterioration over time.

Exploring Different Draught-Proofing Options

There are several options available when it comes to draught-proofing materials. Each option has its pros and cons, so it’s important to evaluate them based on your specific needs. Some common choices include:

1. Silicone Sealant: This versatile material is ideal for sealing small gaps and cracks around uPVC windows. It provides a watertight seal and offers good insulation properties.
2. Draught Excluders: These flexible strips or brushes can be attached to the edges of windows or doors to block draughts effectively. They come in various sizes and shapes to accommodate different gap dimensions.
3. Weatherstripping: This self-adhesive strip is applied along the edges of windows or doors to create an airtight seal. It is available in different thicknesses and widths, allowing you to choose the most suitable option for your uPVC windows.

Consider factors such as ease of installation, durability, cost-effectiveness, and overall effectiveness when selecting your draught-proofing materials.

By carefully evaluating these options and choosing high-quality materials suited for uPVC window insulation, you can ensure efficient draught-proofing that will enhance energy efficiency in your home.

Preparing Your uPVC Windows for Draught-Proofing

Before you begin draught-proofing your uPVC windows, it’s important to properly prepare them. This involves thorough cleaning and identifying areas that require attention. Here’s what you need to do:

Thoroughly Cleaning Your uPVC Windows

Start by removing any dirt, dust, and debris from the window frames. Use a soft cloth or brush to wipe away loose particles. Pay close attention to the corners and crevices where dirt tends to accumulate. Ensure that the surfaces are clean and dry before proceeding with the draught-proofing process.

While cleaning, take the opportunity to inspect your windows for any existing damage or cracks. Look for signs of wear and tear, such as peeling paint or deteriorated seals. Identifying these issues early on will allow you to address them before applying draught-proofing measures.

Identifying Areas Requiring Draught-Proofing

Examine your windows closely for gaps, cracks, and draughts. These can be sources of air leakage that compromise the effectiveness of your insulation. To locate air leaks more easily, you can use a draught detector or even a simple candle flame. Hold it near the edges of your windows and observe if there is any flickering caused by incoming air.

Once you’ve identified areas that require draught-proofing, mark them using tape or a pencil so that they are clearly visible during the next steps of sealing or insulating.
By thoroughly cleaning your uPVC windows and identifying areas in need of attention, you’ll ensure a smooth and effective draught-proofing process.

Sealing Gaps and Cracks: Effective Draught-Proofing Techniques

To achieve optimal draught-proofing for your uPVC windows, it’s important to seal any gaps and cracks effectively. Here are two techniques you can use:

Applying Silicone Sealant for Small Gaps
For smaller gaps, silicone sealant is an excellent choice. Before applying the sealant, make sure the gap is clean and dry. Remove any debris or old sealant using a scraper or brush. Once the gap is prepared, load the silicone sealant into a caulking gun or squeeze tube for precise application.

Carefully apply the sealant along the gap, ensuring that it fills the entire space. Use a steady hand to create a neat line of sealant. After application, smooth the surface of the sealant using a wet finger or a tool designed for this purpose. This will ensure a tight and effective seal against draughts.

Installing Draught Excluders for Larger Gaps

If you have larger gaps around your uPVC windows, installing draught excluders is an ideal solution. Start by measuring the size of the gap and choose an excluder that matches its dimensions. Cut the excluder to fit precisely.

Next, position the excluder in place along the edge of the window frame where the gap exists. Ensure that it covers the entire length of the gap without any gaps itself. Securely attach it using adhesive or screws provided with the excluder.

Draught excluders provide excellent insulation by creating a barrier against cold air infiltration through larger gaps.
By utilising these effective techniques of sealing gaps and cracks with silicone sealant for small gaps and installing draught excluders for larger gaps, you can significantly enhance your uPVC windows’ ability to keep out draughts.

Maintaining and Reapplying Draught-Proofing Measures

Once you have draught-proofed your uPVC windows, it’s important to regularly inspect and maintain the measures you’ve put in place. Here are some key steps to follow:

Regular Inspection and Maintenance

Periodically check the effectiveness of your draught-proofing measures. Look for any signs of wear and tear or damage to the materials. If you notice any damaged or worn-out components, such as cracked sealant or loose excluders, replace them promptly. This will ensure that your uPVC windows continue to provide optimal insulation.

In addition to replacing damaged materials, it’s essential to clean and maintain your windows regularly. Remove any dirt or debris that may accumulate on the surfaces or within the gaps. Keeping your windows clean will help maintain their performance and prolong the lifespan of the draught-proofing measures.

Reapplying Draught-Proofing as Needed

Monitor your uPVC windows for signs of draughts or air leaks over time. As weather conditions change and materials age, it may be necessary to reapply sealant or install new excluders. Be proactive in identifying areas that require attention and take prompt action to maintain a draught-free environment.

Regularly reapplying draught-proofing measures ensures that your uPVC windows continue to provide effective insulation and energy efficiency.

By conducting regular inspections, performing maintenance tasks, and reapplying draught-proofing measures as needed, you can enjoy long-lasting benefits from your initial efforts.

Enhancing Energy Efficiency and Comfort with Draught-Proofing

Draught-proofing your uPVC windows is a highly effective way to enhance energy efficiency and create a more comfortable living environment. By sealing gaps and cracks, you can prevent cold air from entering your home, reducing heat loss and lowering your energy bills. The insulation provided by draught-proofing materials helps maintain a consistent temperature throughout your living space, ensuring comfort in every season.

Maintaining draught-proofing measures is essential for long-term effectiveness. Regular inspections, maintenance, and reapplication of sealant or excluders when needed will ensure that your uPVC windows continue to provide optimal performance.

By taking pride in your DIY draught-proofing accomplishments, you not only improve the energy efficiency of your home but also contribute to a greener environment. Enjoy the benefits of lower energy costs, increased comfort, and the satisfaction of knowing that you’ve made a positive impact.

Colin Greenslade
Written by Colin Greenslade
I'm the founder of Colin's Sash Windows. I disrupted the sash windows market in the UK in 2014 by introducing fixed prices for uPVC sash windows in the UK. Before this they were generally only available at very high prices through window installers. Today our business is one of the market leaders in supply only windows, doors and roofs in the UK.

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