Glasgow · Scotland
Sand mastic for sash & case windows in Cadder, Glasgow
Professional sand mastic in and around Cadder, with old sealant always removed completely and a 12-month guarantee.
- Mastic round period door frames that has failed
- Draughts and rain around sash boxes
- Silicone on a period window that looks wrong
How we handle sand mastic in Cadder
Silicone on a period window often looks wrong and does not suit the building. Sand mastic is the traditional choice and we can swap the silicone for it. We work on timber door frames, period & listed homes and sash and case windows, and people most often call us about cement or filler used on old window joints that has cracked and gaps round a timber door in stone or brick.
Scotland’s cities are full of stone-built tenements and terraces, in sandstone or granite. Natural stone around older windows needs a sealant that won’t mark or attack it, which generally means a neutral-cure product or a traditional sand mastic rather than an acetoxy silicone.
There’s a 12-month guarantee on every job.
- Location
- Cadder (G20, G23, G22)
- Wider area
- Glasgow
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Do you need sand mastic in Cadder?
Scraping and sanding before painting can loosen old mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
Keep an eye out for any of the following:
- Gaps where the frame meets the masonry
- Draughts and rain around sash boxes
- Crumbling sand mastic round a window
- Mastic that needs renewing before redecorating
For landlords with property near Gilshochill station, any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- Who turns up on the day
- Are they insured?
- What the quote includes, VAT included or not
- Which sealant they’ll use, and why
Landlord and commercial work in Cadder
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Hotels need rooms back in use, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
Common questions in Cadder
Who arranges sealant work on the shared parts of a tenement in Cadder?
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. Where the title deeds are silent, the Tenements (Scotland) Act 2004 fills the gaps. Windows often belong to the individual flat, but it’s worth checking your deeds.
Do you work for landlords with property near Gilshochill station?
Yes. We work for landlords and letting agents as well as homeowners. Just email us at info@mrmastic.co.uk with the address and what needs doing, and we will give you a clear quote.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
What’s sand mastic made of?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
Will the old sealant be removed?
Yes, always, and completely. New sealant will not bond properly to old, so the joint is cleaned back first.
Is sand mastic better than silicone for my windows?
It depends on the window. Period windows in stone or brick generally suit sand mastic, while modern frames normally get a flexible sealant.
How long does sand mastic take?
That depends on how much there is to do, but most jobs take a few hours per window, depending on the condition of the joints. We will give you a better idea when we quote.
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We cut it out and start again.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Why it’s worth doing now in Cadder
An open joint round the frame lets weather in. Left, water can reach the timber and the wall so renewing it early protects the window. Private landlords in Cadder must meet the Repairing Standard, and damp or leaks can fall short of it, so failed sealant is best replaced before it becomes a complaint.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Why choose Mr Mastic in Cadder
- Tidy, careful work
- 4.9 on Google from 180+ five-star reviews
- Trusted Arbo and Everbuild sealants
- We never seal over old sealant
See what affects the cost or our reviews.
What the job involves on each surface
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We can do one window or several.
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. If your home is listed, ask your local planning authority about consent.
Keeping the joints in good condition
So the new joints stay in good condition:
- Inspect the joints round the windows every year or so
- Don’t run silicone over sand mastic
- Get any rot dealt with first
- Check with your local planning authority if your home is listed
Leave the new mastic unpainted, which is the traditional advice. Ask us before any decorating around it.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall, so renewing it early is worth it.
Windows and doors in Cadder
With historic houses such as Tenement House (about 2.1 miles south) nearby, there’s older building stock in the area around Cadder as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
Tenement House, about 2.1 miles south, is one of the historic houses in the wider area around Cadder. Managing a site like John Paul Academy? Then its window and door frames need their mastic kept sound, just like a home’s.
Cadder is about 1 mile north of North Kelvinside, in Glasgow. Homes, rented property, offices and hotels in Cadder is covered for sand mastic. The work is guaranteed for a year. Across Glasgow, we cover 183 places, Cadder among them.
Every address in G20, G23 and G22 is within our area for sand mastic, from the main roads to the quietest streets. That includes homes and businesses on Cadder Road, Tresta Road and Hillend Road. Main roads around Cadder include the A879, which makes travel easy. Other places close to Cadder include Gilshochill (1 mile south-west), Lambhill (1 mile south-east), High Ruchill (1 mile south), Maryhill (1 mile west) and Ruchill (1 mile south). Further out, we also cover Glasgow (3 miles south), Calton (4 miles south-east), Langside (5 miles south), Yoker (4 miles west), Mount Florida (5 miles south) and Hillpark (6 miles south).
Around Cadder
We work in homes and buildings around Glasgow University Library and Dawsholm Park, among other places. There’s a railway station in Cadder itself: Gilshochill station. A little further out are Chinatown (2.1 miles south) and Ruchill Hospital (0.9 miles south-east). Green spaces nearby include Bardowie Loch and Castle Hill.
The process
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours per window, depending on the condition of the joints. For a tenement in Cadder, work inside your flat is between us and you, while shared parts may need the factor or neighbours to agree. Tell us which applies when you book.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- Keep children and pets away from the work area
- Mention any leaks or damp you’ve noticed
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
If you are in Cadder and need sand mastic, email us at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.