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A Guide to Adjusting Your uPVC Windows and Fixing Draughts
Known for their durability and excellent insulation properties, uPVC windows have been the go-to choice of double glazing for homeowners for many decades. While uPVC windows are built to last with minimal regular maintenance, you may find over time that you’re noticing the occasional draught from your windows, especially during the colder months. As the leading provider of windows and doors in the Yorkshire area for many years, Clear Vision’s family run business can offer the expertise to banish your draughty windows for good. In this blog we’ll guide you through how to get the very best from your uPVC window frames.
uPVC sliding sash window
Common causes of draughts in uPVC windows
If your uPVC windows are correctly installed by expert fitters they should provide outstanding insulation and keep your energy bills as low as possible. But various factors can cause draughts to creep in over time, reducing the effectiveness of your windows and causing heat loss.
Damaged window seals
Rubber seals around the window can become cracked or perish over time, showing signs of wear and reducing the window’s ability to form a tight seal.
Misaligned frames
A window frame which is not properly aligned can cause a gap between the window sash and the frame, allowing cold air in.
Damaged hinges
Any damage to the hinges or locks can prevent the window from closing completely, creating leaks and affecting the lock position.
Dropped Sash
The sash of the window can sometimes drop slightly due to wear or misalignment, opening up a gap between the frame and the sash. A dropped uPVC window is a common issue in older installations.
Finding out where the cold air is coming from should be an easy process. Just run your hands around the windows on a windy day and find out where the gaps are occurring. Condensation between the panes can also be a sign that the seal has failed.
Adjusting uPVC windows yourself
If the hinges of your uPVC windows have become misaligned over time, gaps can open up. Most casement windows however do have adjustment points for the hinges. Use an Allen key or screwdriver to make minor adjustments to the hinge position until the window closes tightly against the frame, creating better compression and a better seal.
You may also be able to adjust the locking mechanism in the same way – check in the part of the frame the lock engages with for proper alignment. The height of the window can sometimes be adjusted to correct misalignment issues.
Many modern uPVC windows have window cams which can be adjusted too. This is the part of the window latch which sticks out and engages with the frame to lock the window. Some have a summer or winter setting so you can alter the tightness of the seal and friction, and often these can be altered with an Allen key.
With all these adjustments, make small alterations at a time, checking the seal between each adjustment. Too much adjustment can cause other issues.
Worn or damaged rubber seals (weatherstripping) are a common source of draughts, and can be replaced with new self adhesive weatherstripping. For small gaps, apply a small amount of high-quality silicone sealant. These simple fixes can make a big difference to your home’s comfort.
When to seek professional help
If you’re uncomfortable making adjustments yourself, it’s always a good idea to seek professional assistance, particularly if the window has significant damage or you’re struggling to find the cause of the problem.
Older uPVC windows may have complex mechanisms including tilt functions and need someone who understands what needs to be done. If your windows are beyond repair, investing in new uPVC windows might be more cost-effective in the long run.
Clear Vision’s team of fitters have years of experience with windows, doors, conservatories and orangeries (including aluminium options) and work to the highest standards, so do get in touch and we’ll on hand with our expert advice. Visit our showroom at Dryson House, York Road Industrial Estate, Wetherby, West Yorkshire, LS22 7SU, open Monday-Friday 9am-7pm and Saturday 9am-12pm. Call us on 01937 413207, use our online contact form, or email sales@clearvision.co.uk.
