Glasgow · Scotland
Sand Mastic in Knightswood
We cover Knightswood for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly.
- Draughty sash windows at the surround
- Cement or filler used on old window joints that has cracked
- Gaps round a timber door in stone or brick
How we handle sand mastic in Knightswood
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic is the traditional choice, and we can replace one with the other. We work on timber door frames, stone surrounds and period & listed homes, and people most often call us about crumbling sand mastic round a window and silicone on a period window that looks wrong.
Sash and case windows are a feature of older tenements in all four Scottish cities, though many have since been replaced. Whether you are in a tenement flat or a house in Knightswood, the joint between frame and wall is what keeps the weather out.
All our work comes with our 12-month guarantee.
- Location
- Knightswood (G13)
- Region
- Glasgow
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
What sand mastic looks like in Knightswood
Historic houses like Tenement House (about 3.3 miles south-east) are a reminder that the area around Knightswood has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. 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, and many buildings use a factor to arrange it. Who owns the windows depends on the title deeds.
For site and facilities teams at buildings such as Knightswood Secondary School, the mastic around its windows and doors needs looking after like any other building’s. In the older streets around Knightswood St Margaret's Parish Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Knightswood is about 2 miles south of Bearsden, in Glasgow. Homes, rented property, offices and hotels in Knightswood is covered for sand mastic, old or new, large or small. Every job comes with our one-year guarantee. Our area takes in 183 places across Glasgow, from the larger towns to small villages.
Work in G13 is quoted and booked the same way as anywhere else. You’ll find streets such as Ryvra Road, Thane Road and Saxon Road. If you are just outside Knightswood, we cover Anniesland (1 mile south-east), Netherton (1 mile north-east), Temple (1 mile east), Anniesland Cross (1 mile south-east) and Jordanhill (1 mile south). Larger places within reach include Glasgow (4 miles south-east), Woodlands (3 miles south-east), Woodside (3 miles south-east), North Kelvinside (3 miles south-east), Garnethill (3 miles south-east) and Anderston (3 miles south-east).
Local landmarks in Knightswood
Around Knightswood, our work takes us to homes and buildings near Scotstoun Primary School, Jordanhill College and Lock 27 pub. The closest station to Knightswood is Westerton station, about 0.8 miles north of the centre. A little further out are Renfrew Castle (1.8 miles south-west) and Renfrew Museum (2.1 miles south-west). The countryside around Knightswood includes Kilmardinny and Castle Hill.
What happens on the day
We bring everything the job needs with us, so you don’t need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. It normally 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 Knightswood, it helps to know the floor, the door entry arrangements and the nearest parking.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
Getting a quote
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.
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Common questions in Knightswood
Can you do sand mastic in Knightswood?
Yes, Knightswood is within the area we cover. Our work covers the whole of Scotland. You can send an email to info@mrmastic.co.uk and tell us what needs doing.
Who arranges sealant work on the shared parts of a tenement in Knightswood?
Shared parts of a tenement, such as the roof and outside walls, are generally repaired with the agreement of the owners, often through a property factor. 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.
Where is Mr Mastic based?
We are a Crawley-based firm. We work across South East England, London and Scotland.
Can landlords and businesses book you?
Yes. We work in homes, commercial premises and hotels.
How long does sand mastic take to go off?
The surface skins quite quickly, then hardens over a longer period. The weather and joint depth both affect it.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Can new sealant go over the old?
No. We remove every bit of old sealant first.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. Indoors, that generally means someone at home.
How to look after the new joints
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Have rotten timber repaired before new mastic goes in
- Keep modern sealant off the mastic
- Look over the window mastic once a year
- Find out about consent before window work on a listed home
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
What happens if it’s left?
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall, so dealing with it now protects both. For landlords in Knightswood, damp and leaks can be a Repairing Standard issue, so failed sealant is best replaced before it becomes a complaint.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
What you get with us
- Rated 4.9 stars on Google
- One-year guarantee on every job
- We’re fully insured
- Anti-fungal silicone where joints get wet
Signs you need sand mastic in Knightswood
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
People usually contact us when they notice one of these:
- Wind and rain getting in round a sash window
- Cracked mastic round a front door frame
- Weathered mastic on the most exposed windows
- Mastic that needs renewing before redecorating
For landlords with property near Westerton station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Comparing quotes
- How the joint is cleaned and prepared
- Are they insured?
- Whether the sealant suits the joint
- Whether VAT is included
Nearby places to Knightswood
Other services in Knightswood
Different surfaces, different methods
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We work on single windows or whole elevations.
What affects the quote in Knightswood
Every job gets its own quote. These are the things that affect it:
- How easy the joints are to reach
- Which sealant suits the joint
- Whether there’s mould to deal with
- When we can work, for business premises
Doing several joints on one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- How we’d reach the joints
- Whether it has been sealed before
- What’s wrong with the joints now
- Photos by email, if that’s easy
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, drop us a line at info@mrmastic.co.uk.
Landlord and commercial work in Knightswood
We work for landlords and agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.