Glasgow · Scotland
Sand mastic for sash & case windows in Garnethill, Glasgow
Sand mastic across Garnethill and nearby, with old sealant always removed completely and a 12-month guarantee.
- Gaps between timber frames and stone or brick
- Mastic dropping out of the joint
- Gaps round a timber door in stone or brick
Sand mastic in Garnethill, done properly
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant and we’ll explain which is best for yours. We work on brick reveals, period & listed homes and tenement windows, and people most often call us about old sand mastic that has cracked, crumbled or fallen out and old cement repairs round a window that have failed.
Garnethill is in one of Scotland’s four big cities, where many older buildings are sandstone or granite. Stone needs a sealant that suits it, so acetoxy silicones, which can attack some stone, are best avoided.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we will put it right.
- Location
- Garnethill (G3, G2, G4)
- Wider area
- Glasgow
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Common questions in Garnethill
Is Garnethill in your area for sand mastic?
Yes, Garnethill is within the area we cover. Our work covers the whole of Scotland. Just email us at info@mrmastic.co.uk with a few details of the job.
I let a flat near Charing Cross (Glasgow) station. Can you help?
Yes, landlords and agents are among the people we work for. You can email us at info@mrmastic.co.uk with the details for a clear quote.
Do you guarantee sand mastic work?
You get our one-year guarantee on every job.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Where is Mr Mastic based?
We’re a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Do you do commercial work?
Yes, regularly. Larger jobs can be planned room by room or area by area.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
When will the new mastic be hard?
It takes a while. It skins first and hardens fully later and we will give you an idea for your job.
Different surfaces, different methods
Stone surrounds
Sand mastic sits naturally against stone. The finish blends with the masonry.
Timber door frames
Sand mastic is used round timber door frames too. We renew it the same way as on windows.
Common problems we fix in Garnethill
Timber swells and shrinks with the weather. That movement opens up the mastic joint little by little.
Common reasons people contact us include:
- Wind and rain getting in round a sash window
- Patchy fillers round a sash window
- Gaps where the frame meets the masonry
- Mastic worn away on windows facing the weather
Managing a site like St Aloysius' College? Then larger buildings have plenty of frames, and the mastic around each one ages.
What your quote should include
- How hidden problems are handled
- What product goes in the joint
- Whether they’re fully insured
- How long to leave it before use
What affects the cost of sand mastic
Your quote is based on your job. We take into account:
- Which sealant suits the joint
- Access and height
- How much old sealant there is and how hard it is to remove
- Any mould that needs treating
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
What we need to know
Photos by email are helpful but not essential. Please mention:
- The address or postcode of the job
- A few photos by email, if you can
- How many joints, rooms or windows are involved
- What’s wrong with the joints now
Getting a quote is simple: let us know the job and the location. Photos by email help us understand the job, and we will take it from there.
Also near Garnethill
What else we do in Garnethill
Why it’s worth doing now in Garnethill
Not every draught comes from the sashes themselves. Gaps between the frame and the wall can be just as bad and new mastic seals them. For landlords in Garnethill, damp and leaks can be a Repairing Standard issue, so it’s worth fixing failed sealant before a tenant reports it.
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first.
Why book with us
- Experience in homes, commercial sites and hotels
- Fully insured
- Approved under the ARBOMaster scheme
- One-year guarantee on every job
Read our cost guide or customer reviews.
What happens on the day
When we arrive, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before any work begins. The work generally takes a few hours per window, depending on the condition of the joints. Many homes in Scotland’s cities are tenement flats, reached through a shared close and up a common stair. In Garnethill, it helps to know the floor, the door entry arrangements and the nearest parking.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- Tell us about any water getting in
- Clear items away from the joints we are working on
- Let us know about stairs, lifts or work at height
Getting a quote
We quote each job on its own. Simply drop us a line at info@mrmastic.co.uk and describe the job.
Advice
Sand mastic in Garnethill: local notes
Much of Glasgow is built from red and blond sandstone, and porous sandstone needs a sealant that will not mark it. Historic houses like Tenement House (about 0.1 miles north-west) are a reminder that the area around Garnethill has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
For an older house near a landmark such as St Aloysius Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you let a flat or house near Charing Cross (Glasgow) station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Garnethill is about 1 mile north of Glasgow, in Glasgow. Our applicators cover sand mastic for homes and businesses in Garnethill and nearby, as part of our work across Glasgow. Our area takes in 183 places across Glasgow.
All of G3, G2 and G4 is covered for sand mastic. That includes homes and businesses on Kent Road, Bath Lane and Cliff Road and the roads around them. Close by, we work in Anderston (1 mile south-west), Blythswood Hill (1 mile south), Cowcaddens (1 mile east), Sandyford (1 mile south-west) and Woodlands (1 mile north-west). Within a short drive, we also cover Langside (3 miles south), Yoker (5 miles west), Mount Florida (3 miles south), Hillpark (4 miles south), Shawlands (3 miles south) and Temple (3 miles north-west). Being one of Glasgow’s larger places, Garnethill has homes, rented property and businesses of every kind.
Landmarks near Garnethill
We work in homes and buildings around St Vincent Street Church, Kelvingrove Park and The Hengler's Circus pub and the streets around them. You will also find Stirling's Library (0.9 miles south-east) and College of Piping (0.8 miles north-west). Garnethill has its own railway station: Charing Cross (Glasgow) station. A little further out are Scottish Jewish Archives Centre (within half a mile north-west) and Bishop's Castle (1.2 miles east). Green spaces nearby include Hogganfield Loch.
When it is not the sealant
Before you book, it’s worth knowing the limits too:
- Sashes that need overhauling
- Decayed frames that need repair
- Putty and glazing repairs
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Timber door frames
- Brick reveals
- Stone surrounds
- Tenement windows
- Period & listed homes
- Sash and case windows
DIY versus a professional finish
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.