Glasgow · Scotland
Window Mastic in Kelvindale
We cover Kelvindale for mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Gaps where the sill meets the wall
- Cold air getting in at the frame edge
- Damp patches on the reveal after heavy rain
Questions from Kelvindale
Do you work for landlords with property near Kelvindale station?
Yes. We work for landlords and letting agents as well as homeowners. You can email us at info@mrmastic.co.uk with the details for a clear quote.
Who arranges sealant work on the shared parts of a tenement in Kelvindale?
It normally goes through the owners together, or through the factor if the building has one. The Tenements (Scotland) Act 2004 sets the rules for common parts if the deeds do not.
What should I tell you?
Let us know what needs doing and where, plus pictures if you have them. If we need more, we’ll ask.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
Do you seal inside as well as outside?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We can do either or both.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
Window mastic for homes and businesses in Kelvindale
Around Kelvindale we seal all kinds of frames: uPVC, aluminium, timber and composite, along with patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. If you are dealing with sealant in the wrong colour for the frame and mastic that has split away from the wall, we can put it right, whatever the surface.
Sash and case windows are a feature of older tenements in all four Scottish cities, and plenty still have them. Whether you’re in a tenement flat or a house in Kelvindale, the joint between frame and wall is what keeps the weather out.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Kelvindale (G12, G20, G13)
- Wider area
- Glasgow
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Ventilate rooms so frames do not stay wet inside
- Make sure the drainage slots aren’t blocked
- Keep timber frames painted
- Don’t paint over the silicone
Most silicone sealants will not take paint, so mention any painting plans before work begins. We can use a paintable sealant where that matters.
A failed joint lets water into the wall a little at a time. You might not see it until plaster blows or a damp patch appears inside. Early resealing stops it reaching that point.
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
We also work for property managers and facilities teams in Kelvindale and across Glasgow. We can quote a run of properties together, and we are fully insured for the work.
Nearby places to Kelvindale
More services for Kelvindale
The process
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. Inside a flat in Kelvindale, the job is planned with you; outside, shared parts may need the factor or other owners involved. It helps to know which it is when you get in touch.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Move anything stored near the joints
- For indoor joints, keep the area dry beforehand if you can
Get a quote
Want a quote for window mastic? Please email us at info@mrmastic.co.uk with a few details. We’ll explain what we’d do and give you a clear price before any work starts.
Read more
Different surfaces, different methods
Composite doors
Draughts round the door leaf normally come from worn seals or adjustment, not the mastic. We seal the frame and let you know about anything else.
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. It comes out, deep gaps get backing rod and the joint is resealed.
What affects the cost of window mastic
There’s no set price list. What we look at:
- Any working-time requirements on site
- The number and length of the joints
- Whether there’s mould to deal with
- Which sealant suits the joint
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please email us at info@mrmastic.co.uk and we will talk you through it.
Helping us quote
When you call or email, it’s useful to know:
- What’s wrong with the joints now
- Roughly how big the job is
- Any previous sealing or DIY work
- Where the job is, and your postcode
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we’ll explain what’s involved.
DIY versus a professional finish
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Window mastic in Kelvindale: local notes
Under the Tenements (Scotland) Act 2004, shared parts of a tenement, such as the roof and outside walls, are looked after by the owners together, often through a property factor. Who owns the windows depends on the title deeds. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
For site and facilities teams at buildings such as Cleveden Secondary School, its window and door frames need their mastic kept sound, just like a home’s. For an older house near a landmark such as St John's Renfield Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Kelvindale is about 2 miles south of Bearsden, in Glasgow. Homes, rented property, offices and hotels in Kelvindale is covered for window mastic, old or new, large or small. Every job comes with our one-year guarantee. Our area takes in 183 places across Glasgow, large and small.
Postcode districts we cover here for window mastic: G12, G20 and G13. Streets in the area include Cowal Road, Foulis Lane and Temple Road, and we cover them all. Close by, we work in Kelvinside (1 mile south-east), Dawsholm (1 mile north), Anniesland Cross (1 mile west), Temple (1 mile west) and Hyndland (1 mile south). Larger places within reach include Glasgow (3 miles south-east), Calton (4 miles south-east), Blythswood Hill (3 miles south-east), Langside (5 miles south), Yoker (3 miles west) and Mount Florida (5 miles south-east).
Local landmarks in Kelvindale
In Kelvindale, that means homes and buildings near Glasgow University Library, The Esquire House and Dawsholm Park and the streets around them. Kelvindale has its own railway station: Kelvindale station. Other landmarks nearby include Gartnavel General Hospital (0.5 miles south) and Glasgow Museum of Transport (1.6 miles south). For a walk, there’s Kilmardinny and Castle Hill.
Signs you need window mastic in Kelvindale
Sills take more water than any other part of a window, and the ends of the sill, where it meets the wall, are where it gets in. When that sealant fails, water gets into the wall or under the frame.
Signs it’s time to call us include:
- Cracked or shrunken mastic around the frame
- Mastic that is falling out in pieces
- Leaking joints at the ends of sills
- Draughts coming in around windows and doors
Letting a property close to Kelvindale station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Comparing quotes
- How hidden problems are handled
- Whether you can choose the colour
- Whether VAT is included
- What product goes in the joint