At Crystal, we specialise in misted double glazing repair, retaining the existing uPVC frame to help customers across Burnley, Pendle and Blackburn save thousands of pounds.

Cloudy double glazing is usually caused by a failed sealed unit. Once the seal around the glass breaks down, moisture gets between the panes, causing misting or condensation that cannot be cleaned away from either side. In some cases, surface dirt or residue can look similar, but if the cloudiness is inside the unit, the glass itself needs replacing. Fortunately, the frame can more often than not be retained. If your windows have this problem, see our blown window repair page for more on replacing your failed units while keeping existing uPVC frames.

Yes. Failed double glazing in uPVC doors can usually be replaced without changing the whole door. If the frame is still in good condition, the sealed glass unit can be carefully removed and a new one fitted in its place. This applies to many front doors, back doors, French doors, double doors and other glazed uPVC door styles. It is often a far more practical and cost-effective option than full replacement. For more information, see our door glass repair page.

Yes, in many cases double glazed units can be removed and fitted from the inside, especially with certain uPVC window styles where the internal beading allows access. In other cases, fitting may need to be done from the outside depending on the window or door design. It depends on how the unit is glazed and what access is available. The important thing is that the replacement is fitted securely and correctly. If you are dealing with a failed unit, our double glazing repair service covers replacing the glass while retaining the existing uPVC frame.

We carry out our work carefully and in a way that is designed to protect the existing uPVC frame. The failed unit is removed using the correct method and tools, with care taken throughout the process to avoid unnecessary disturbance to the surrounding frame, beads and seals. Where the frame is in good condition to begin with, the aim is to retain it in the condition it was found and fit the new sealed unit neatly and securely in position. Our focus is on a clean, professional repair rather than turning straightforward glass replacement into a larger job.

Yes. If your existing uPVC frames are in good condition, it is often possible to improve noise reduction by replacing the sealed units rather than whole windows. Upgrading to acoustic glazing can help reduce traffic noise and other outside disturbance while keeping the original frames in place. The level of improvement depends on the overall window setup and the type of noise involved, but it can make a noticeable difference in the right setting. See our acoustic glass page for more on how this upgrade works.

We will do our utmost to match the existing glazing in your property where possible, including the overall appearance of the unit and how it sits within the surrounding windows or doors. In many cases, a close match can be achieved, but the exact result can depend on the age, specification and style of the original glass. Anything unusual about the existing glazing will usually be identified when the unit is assessed and measured. The aim is always to ensure the replacement looks appropriate and consistent once fitted.

Absolutely, replacing a failed unit can be a good opportunity to improve the specification of the glass at the same time. Our standard glazing is Pilkington K Glass™ S, a low-E glass with strong thermal performance as standard. If you would like to move beyond a standard specification, this can be discussed during the survey visit and we can talk you through the upgrade options available, depending on the window, door, and the result you are looking to achieve.

Yes. Replacing worn hinges, damaged handles and faulty locks are among the most common repairs we carry out. New hinges, handles or locks can be fitted to a single window if the problem is isolated, or across all windows in the property if several are showing signs of wear. The same applies to many uPVC doors too, where worn hinges or tired handles can affect how the door opens, closes and locks. If the frame is still in good condition, replacing the hardware is often a straightforward way to restore proper operation. When changing hardware on a single window or door, we will endeavour to match any replacements to what's already there, but this will depend on the age of existing hardware and availability.

At Crystal, we take our environmental responsibilities seriously. We will remove old glazed units, hardware and uPVC from your property and recycle it wherever practically possible, helping to keep waste to a minimum. Glass can be crushed into cullet and used in the manufacture of new glass products, uPVC can be processed for reuse in a range of new applications, and metal window and door hardware can be recycled and melted down for further use. The aim is simple: to carry out each job responsibly and send as little waste to landfill as possible.