Glasgow · Scotland
Govanhill Window Mastic
Mastic around window and door frames, sills and patio doors for homes and businesses in Govanhill and across Glasgow. Fully insured, ARBOMaster approved and guaranteed for a year.
- Damp patches on the reveal after heavy rain
- Cracked internal joints between frame and plaster
- Cracked sealant at the sill ends
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
How we handle window mastic in Govanhill
There are two joints on most windows. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. Common call-outs are for water coming in at the bottom corners of a door and gaps where the sill meets the wall, on composite doors, uPVC windows and window sills.
Tenement flats in Scotland’s cities often have windows high above the street, so the mastic outside can go unchecked for years. For a flat in Govanhill, access is the first thing to plan, and in a tenement the outside of the building may be a shared repair.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Govanhill (G42, G41, G5)
- Region
- Glasgow
- Cover
- One year on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Also near Govanhill
Other services in Govanhill
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Keep solvents and bleach off the sealant
- Don’t paint over the silicone
- Walk round the house once a year and look at the joints
- Use gentle cleaners on frames and sealant
Most silicone sealants won’t take paint, so if you are planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
How we quote for window mastic
For a quick quote, just ask. What matters most is:
- Working hours on commercial sites
- Whether old sealant or filler has to be cut out
- The product the joint needs
- The size of the job
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Asking for a quote
What to tell us when you ask for a quote:
- Roughly how big the job is
- Any access issues, like height or stairs
- Photos by email, if that’s easy
- Where the property is
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, email us at info@mrmastic.co.uk.
Different surfaces, different methods
uPVC windows
uPVC expands and contracts noticeably with temperature, so we use a flexible, low-modulus sealant. White is the usual colour, with brown, anthracite grey and black for coloured frames.
Window sills
The end joints of a sill tend to fail before the rest. A tight seal at each end keeps rain out of the wall.
How it works
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours for a few frames, or a day or more for a whole house. For a tenement in Govanhill, work inside your flat is between us and you, while shared parts may need the factor or neighbours to agree. It helps to know which it is when you get in touch.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Clear the area around the work
- Keep pets and children clear of the area while we work
- Tell us about any previous sealing or DIY attempts
Ask for a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To get started, email us at info@mrmastic.co.uk.
Advice
Common questions in Govanhill
Can you do window mastic in Govanhill?
Yes, Govanhill is within the area we cover. We work across all of Scotland. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing.
How do repairs to the shared parts of a tenement in Govanhill get organised?
The owners of the flats normally agree repairs to shared parts like the roof and outside walls, and many buildings have a factor to arrange it. The Tenements (Scotland) Act 2004 sets out how that works where the title deeds do not. Your title deeds will say who owns the windows.
Do you work for letting agents?
Yes, regularly. Several properties can be quoted together.
Is the work guaranteed?
Yes, with our one-year guarantee. A yearly look at the joints helps them last.
Can I add another job to the visit?
Yes. Just list everything you need.
Which products do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we are using.
Do you have sealant for grey or black windows?
Usually, yes. Mention the frame colour when you ask for a quote and we’ll match it as closely as we can.
Do I have to be there?
If the work is inside, we need someone to let us in. Once we have agreed the job, you do not need to watch us work.
What we are called out for in Govanhill
Mastic ages in the weather. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
The problems people generally mention when they call are:
- Black, perished sealant on frames
- Leaking joints at the ends of sills
- Hard, cracked sealant around windows
- Rain getting in at the frame or under the sill
Homes close to Govanhill Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- Whether they seal over old material or remove it
- Are they insured?
- How the surfaces are prepared before sealing
- Whether VAT is included
Frames and glazing around Govanhill
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that. Much of Glasgow is built from red and blond sandstone, and sandstone is porous, so any sealant against it has to be one that won’t stain or attack it.
For landlords with property near Queens Park (Glasgow) station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. If you look after a building such as Holyrood Secondary School, its window and door frames need their mastic kept sound, just like a home’s.
Govanhill is about 1 mile south-east of Glasgow, in Glasgow. We provide window mastic to householders, landlords and businesses in Govanhill and the surrounding area. Our Glasgow coverage runs to 183 places, and Govanhill is one of them.
We work across G42, G41 and G5 for window mastic and the streets around it. We cover properties on Agnew Lane, Dixon Road and Ardbeg Lane. Other places close to Govanhill include Crosshill (1 mile south), Strathbungo (1 mile west), Pollokshields (1 mile west), Hutchesontown (1 mile north-east) and Laurieston (1 mile north). Further out, we also cover Hillhead (3 miles north), Dowanhill (3 miles north-west), Woodside (3 miles north), North Kelvinside (3 miles north), Partickhill (3 miles north-west) and Yorkhill (3 miles north-west).
Around Govanhill
In Govanhill, that means homes and buildings near Queen's Park, John Bosco Secondary School and 51 pub and the streets around them. Other local landmarks include Our Lady and St Margaret's Primary School (1.2 miles north-west) and Glasgow Women's Library (1.4 miles north-east). Govanhill has its own railway station: Queens Park (Glasgow) station. Nearby you will also find New Victoria Hospital (0.6 miles south) and Princes Square (1.5 miles north). Green spaces nearby include Hogganfield Loch and Cathkin Braes.
What we cannot put right
To be straight with you, there are a few things sealant won’t fix:
- A door that needs adjusting, rehanging or new seals
- Damp problems in the wall away from the window
- Condensation trapped between the panes
If you’re not sure, just drop us a line at info@mrmastic.co.uk and we’ll give you a straight answer before booking.
Surfaces we seal
- Aluminium frames
- Composite doors
- Patio & French doors
- uPVC windows
- Timber windows & doors
- Window sills