Glasgow · Scotland
Window & door mastic in Sighthill, Glasgow
Professional window mastic in and around Sighthill, with every bit of old sealant taken out first.
- Old mastic that has gone black or come away
- Gaps where the sill meets the wall
- Cold air getting in at the frame edge
How we handle window mastic in Sighthill
There are two joints on most windows. Outside, the mastic keeps rain out; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. If you’re dealing with leaking joints at the ends of sills and hard, cracked sealant around windows, we can put it right.
Older stone-built tenements in Scotland’s cities were built with sash and case windows, and plenty still have them. Whether you are in a tenement flat or a house in Sighthill, the joint between frame and wall is what keeps the weather out.
The work is covered for a year after we finish. If anything isn’t right with it, drop us a line at info@mrmastic.co.uk.
- Place
- Sighthill (G21, G4, G2)
- Region
- Glasgow
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Use gentle cleaners on frames and sealant
- Do not use solvent cleaners on the joint
- Don’t aim a pressure washer at the joints
- Repaint timber before it’s bare
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Nearby places to Sighthill
More services for Sighthill
Sighthill homes and the weather
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that. Historic houses like Provand's Lordship (about 0.6 miles south) are a reminder that the area around Sighthill has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Provand's Lordship, about 0.6 miles south, is one of the historic houses in the wider area around Sighthill. Letting a property close to Barnhill station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Sighthill is about 1 mile east of Woodside, in Glasgow. Jobs in Sighthill get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Across Glasgow, we cover 183 places, and Sighthill is one of them.
Here we cover the G21, G4 and G2 postcode area for window mastic. That includes homes and businesses on St James Road, Stirling Road and Pinkston Road and the roads around them. Sighthill is on the A804, which makes it straightforward to reach with everything needed for window mastic. Nearby, we also carry out window mastic in Royston (1 mile south-east), Townhead (1 mile south-west), Port Dundas (1 mile west), Old Balornock (1 mile east) and Blochairn (1 mile east). Larger places within reach include Dowanhill (3 miles west), Partickhill (3 miles west), Kelvinside (3 miles west), Hyndland (3 miles west), Langside (4 miles south-west) and Yoker (6 miles west).
Around Sighthill
Locally, jobs take us to homes and businesses close to Our Lady of Good Counsel Church, 55-57 Cochrane Street pub and Andersonian Library, among other places. Sighthill’s nearest station is Barnhill station, about 0.7 miles north-east of the centre. Well-known places in the area include Canniesburn Hospital (under half a mile south) and Heatherbank Museum of Social Work (0.6 miles south-west). For a walk, there’s Lenzie Moss and Hogganfield Loch.
Your questions about window mastic in Sighthill
How is work on the outside of a tenement in Sighthill normally arranged?
Shared parts of a tenement, such as the roof and outside walls, are usually repaired with the agreement of the owners, often through a property factor. The Tenements (Scotland) Act 2004 sets out how that works where the title deeds do not. Windows often belong to the individual flat, but it’s worth checking your deeds.
Do you work for landlords with property near Barnhill station?
Yes, rental work is part of what we do. You can drop us a line at info@mrmastic.co.uk with the address and a few details, and we will give you a fixed price before work begins.
When is the sealant fully cured?
It depends on the product and the conditions. Before we leave, we’ll tell you the cure time.
Can you seal over the old sealant?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Do you remove the old sealant?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Can you do the inside joint as well?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We can do either or both.
Will resealing my frames help with draughts?
Yes, if the air is getting in around the frame. If it’s coming through the window seals, we will tell you.
Do you guarantee window mastic?
Yes, for 12 months. A yearly look at the joints helps them last.
Honest limits
It helps to know what we cannot do too:
- A door that needs adjusting, rehanging or new seals
- Soft or decayed wood in the frame
- A failed sealed unit that has misted up
Not sure which it is? You can email us at info@mrmastic.co.uk and we will tell you honestly before booking.
Joints and surfaces we work on
- Aluminium frames
- Window sills
- Timber windows & doors
- Patio & French doors
- uPVC windows
- Composite doors
How the job changes by surface
Window sills
Every drop off the glass ends up on the sill, so the sill ends and the joint under the frame are vital. Each is cleaned out and resealed.
uPVC windows
uPVC expands and contracts noticeably with temperature, so the joint needs a low-modulus sealant that stays flexible. White is the usual colour, with brown, anthracite grey and black for coloured frames.
Why deal with it now?
Running fresh sealant over the old joint is tempting, but it won’t grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. Wind-driven rain gets into any failed joint on the outside of a city building, and in a tall building in Sighthill, damp can travel a long way before it shows.
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, drop us a line at info@mrmastic.co.uk and we’ll give you an honest view and a quote.
Why book with us
- A choice of colours where the product allows
- Over 20 years’ experience
- Experience in homes, commercial sites and hotels
- We are fully insured
Read our cost guide and customer reviews.
What happens on the day
We keep the work tidy and contained to the joints we’re treating, so you can carry on as normal. The job normally takes a few hours for a few frames, or a day or more for a whole house. Parking in city streets around Sighthill can be tight or controlled, so it helps to know about permits or nearby bays. For flats, mention the door entry system and any shared-stair arrangements.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
How to prepare
- Move anything stored near the joints
- For indoor joints, keep the area dry beforehand if you can
- Mention if the joints have been sealed before
Get a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, drop us a line at info@mrmastic.co.uk.
Advice
Do you need window mastic in Sighthill?
Sills take more water than any other part of a window, so the sill ends and the joint below the frame are common leak points. When that sealant fails, water gets into the wall or under the frame.
The problems people generally mention when they call are:
- Cold air getting in at the frame edge
- Old mastic that has gone black or come away
- Sealant in the wrong colour for the frame
- Draughty joints inside around the window
For site and facilities teams at buildings such as St. Roch's Secondary School, its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before booking
- Which sealant they’ll use, and why
- How long to leave it before use
- What happens if the job turns out different
- What preparation is included
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.