We all know that windows are essential to a building – but it’s not just about the ventilation and comfort of the building’s occupants. It has to do with aesthetics as well – the windows serve as the ‘eyes’ of a building, and if they are discoloured or in general ill-repair, they can drastically affect a building’s overall look and appeal. So if you have a building whose windows have seen better days, you may be thinking of having them replaced – but instead of replacement, what about having them restored instead? The good news is that many window restorers nowadays specialise in window restoration – and do a great job! But as with all major projects, it’s better to know what to expect. Here, then, is what you can expect with a metal window restoration project.
The first step: the survey
The first thing you need to do if you have decided to have your windows restored is a survey. When you do, a professional will document what type of windows they are plus where in the building they are located – along with their size, the glass condition, the type of hardware used, and the frame condition. Additionally, the frame has to be checked for its operability, the finish’s condition, corrosion or rust, sealant and putty, bowing, warping, or anchorage.
With this, you will know exactly how many windows require restoration and how much hardware or glass needs replacement. Another aspect that needs careful inspection is whether or not you would need to replace any hazardous materials. So the restoration expert will know how to deal with substances such as asbestos in the putty or a lead-based finish for old windows.
Corrosion – the most common issue
The most common issue with metal windows of all kinds is corrosion – which is the singular number one cause of jammed, failing, or warped frames. The first sign or symptom of corrosion is the loss of paint, as confirmed by Crittall window repairs specialists like Metwin. When it comes to heavier signs of corrosion, you would often be looking for a raised pitting or finish. The heavy buildup of rust and corrosion on a frame can cause the sash or frame to warp or bow. In the worst-case scenario, corrosion often progresses to the point where your window experiences delamination, a loss of a section, or a loss of a portion.
If the window exhibits minor corrosion – for instance, the loss of paint – it can be repaired on-site. Next, the window can be put through a micro-abrasive process of cleaning. Sometimes, a more aggressive option is employed, such as chemical stripping or power grinding. Still, it always has to be done by a professional who knows precisely what they are doing. It is especially true for the chemical/s used because it depends on what kind of chemical it is and the surrounding materials, which can be affected. Once the window frame is cleaned, however, the substrate has to be primed to avoid oxidation.
Sometimes, the window can be cleaned on-site; for instance, windows with a raised finish and pitted surface can be done on-site. But if the sashes have experienced heavy corrosion, it is better to remove them and bring them to a shop to be repaired and cleaned.