Stained Glass Restoration Glasgow
Stained and leaded glass usually fails slowly. The lead softens and the cement dries out over decades, so a panel that once sat flat quietly starts to bow, crack, or let in a draught it never used to.
We assess what has failed and manage the repair from removal to reinstallation. Where a window needs more, the panel is encapsulated inside modern double glazing, keeping its exact appearance while performing like a new window.
Leaded glass repair, handled start to finish
What a leaded glass repair involves
A leaded panel with isolated damage, a cracked pane, a section of lead that has come away from the glass, or a corner that has started to bow rarely needs anything more than a proper repair.
The damaged section is repaired, and a matching pane goes in where the original glass cannot be saved, leaving the remaining panel as it was to preserve the feel of the original glass.
We assess the panel in your home, remove it ourselves, and take it to the specialist stained glass studio we have worked with for years.
Once the glass work is complete, we collect the panel and fit it back.
Traditional techniques on the timber and the glass
Glasgow Traditional Windows works with traditional timber sash and casement windows, keeping as much of the original preserved as possible.
A restored panel goes back into its opening as carefully as it came out.
The studio we work with takes the same approach to glass.
Hand-cut glass varies in colour and texture piece to piece, and traditional leaded glass techniques respect that, so what goes back into your window matches the craftsmanship it was built with rather than a uniform modern substitute.
Where the wider window needs attention too, not just the glass, our own timber window repair team handles the frame and sash while the panel is out.
Did what they said they would do, when they said they would do it, for the price they quoted. That should be standard but in my experience it rarely is. Very happy with the result.
Got a few quotes. Fraser not only offered the best value but was much more knowledgeable than some of the other window contractors. It was by far the most straightforward and he clearly knew his stuff. Glad we went with them.
Central heating was on constantly last winter. Since the windows went in we have noticed a real difference. Good guys, tidy workers, smooth from start to finish.
I researched quite a few companies before making a decision. What set Glasgow Traditional Windows apart was the level of knowledge and the straightforward approach. There was no sales pressure, just clear and honest advice.
Encapsulation into double glazing without losing the light
A repair fixes what is broken, but it does nothing for a single-glazed leaded window’s weakness.
It is a single pane of glass in a lead frame, draughty and fragile no matter how well the lead is maintained.
Encapsulation transforms performance and enhances insulation without touching the panel’s form.
The original panel comes out of the window, and every damaged lead or cracked pane is repaired first, the same work covered above.
Once sound, the panel is set into a double-glazed unit built to fit its dimensions, with the original glass as the visible layer and a clear pane behind it for strength and longevity.
From the street, the window looks just as it always did.
The sealed frame keeps the weather off the glass and adds an inner pane behind it, without changing anything visible.
If the surrounding timber sash or casement needs attention at the same time, our sash window conversion service covers that side of the job.
Signs a stained or leaded glass panel needs attention
Bowing and cracked glass
A bowing panel is the clearest sign.
A section of glass that has started to dip forward or bulge out of its frame means the lead has already stretched past the point of holding its shape.
Cracked or missing pieces of glass are the next most common issue, often caused by nothing more dramatic than a slammed door shaking a loose pane free.
A leaded panel above or beside a front door is one of the most exposed points in the entrance, given how many hands pull at that door every day.
It is often the first stained glass feature to show wear on an otherwise well-maintained property.
Book a Free Assessment
We’ll look at what you have, tell you what it needs, and put it in writing. If a repair will do, we’ll say so.
Draughts and condensation
Draughts around a leaded window that has never been draught-proofed are normal rather than a fault, since the design was never airtight to begin with.
A sudden increase usually points to a lead joint that has failed.
Condensation between layers of glass, or a panel that rattles when a nearby door closes, both point toward loose or perished cement rather than anything structural.
Spotting a bow, a crack, or a new draught early usually keeps the job a straightforward repair.
Once decay has spread across the piece, a full encapsulation becomes the more likely route.
Approved for conservation areas and listed buildings
Original stained and leaded glass is exactly the kind of historic, architectural fabric that Listed Building Consent is designed to protect.
Removing or replacing it without consent can put a homeowner in breach of that consent.
Repair and encapsulation both retain the original panel, which is usually the compliant route where full replacement would not be.
We are an established, approved contractor for Glasgow City Council and have worked alongside Historic Scotland on traditional window and glasswork projects for years.
A stained glass restoration carried out through our company already meets the standard those bodies expect.
Our Latest Case Studies
Why homeowners choose GT Windows for stained glass restoration
One point of contact, honestly quoted
The glass work itself happens in the workshop of a specialist studio we have trusted for years, rather than on site, so a fragile panel is handled in a controlled space rather than balanced on a ladder in situ.
We remove the panel, board the opening up securely, and deliver the glass to that workshop ourselves, keeping disruption to your home to a minimum throughout
All jobs receive a free, no-obligation quote with no hidden costs once a job is underway.
Fitted, finished and checked before we leave
Our team stays deliberately small, and every installation is carried out under Fraser’s on-site supervision.
Once the panel is back in the opening, the putty or beading is made good and the surrounding timber painted in to match the frame, so the finish matches the rest of the window rather than announcing where the work was done.
Before we leave, the seal around the panel is checked from inside and out, the boarding comes down, and the opening is left clean with nothing for you to arrange afterwards.
Every client’s panel gets the same standard of care, on a single repair or a larger stairwell refurbishment.
Areas we cover throughout Glasgow
We manage stained and leaded glass restoration across Glasgow and the west of Scotland, from tenement flats in the West End and Southside to villas in Bearsden, Newton Mearns, and Milngavie.
A close facing south wears differently to one that never sees direct sun, and a panel that has already had one heavy-handed repair often needs different treatment to one that has never been touched.
We travel to see every panel in person before quoting, across Glasgow itself, Paisley, East Kilbride, and further out towards Renfrewshire and Edinburgh.
Your stained glass restoration questions answered
Can stained glass be repaired?
In most cases, yes. Damaged stained glass, a cracked pane, or a length of failed lead can usually be repaired on its own, without disturbing the rest. Encapsulation becomes the better route once several sections have failed or the panel has started to bow.
How much does stained glass restoration cost?
Every quote depends on the size of the panel, the extent of the damage, and the type of work needed, whether that’s a straightforward repair or a full encapsulation into double glazing. Every panel gets a proper look in person before we put a figure on the job.
What is encapsulation, and does it change how the window looks?
No. Encapsulation sets your existing stained glass panel inside a new double-glazed unit without altering its design, so the window looks the same from the street and from inside the room while gaining the thermal performance and strength of modern glazing.
Do I need permission to restore stained glass in a listed building?
Usually not for repair or encapsulation, since both retain the original panel rather than replacing it. Removing or altering original stained glass in a listed building without consent is a different matter, so it is worth checking with us or the council before any work that changes the panel’s appearance.
How long does stained glass restoration take?
Most jobs take around two weeks from removal to reinstallation, with the glass work carried out in the specialist studio’s workshop rather than on site. The opening is boarded up securely for that period, and we will give you a realistic timeframe once we have seen the panel.
Request your stained glass restoration quote
A stained or leaded glass panel that has been bowing, cracking, or losing pieces for years is rarely past saving.
The sooner it is assessed, the more of the original glass stays salvageable.
Our team will come out to look at the panel and communicate whether repair or encapsulation is the right approach for your property.
Call 07714 756742 · Mon–Fri, 9am–6pm