North Lanarkshire · Scotland
Glenboig Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Glenboig, with a 12-month guarantee on every job. Ask us for a quote.
- Wind and rain getting in round a sash window
- Mastic that needs renewing before redecorating
- Mastic worn away on windows facing the weather
DIY versus a professional finish
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Sand mastic in Glenboig
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. We work on stone surrounds, period & listed homes and tenement windows, and people most often call us about mastic that needs renewing before redecorating and crumbling sand mastic round a window.
Many older Scottish homes still have timber windows set into stone walls. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
Your job is guaranteed for a year, as with all our work.
- Where
- Glenboig (ML5)
- Region
- North Lanarkshire
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What happens on the day
The work is kept neat and contained to the joints we are treating. The job usually takes a few hours per window, depending on the condition of the joints, and we explain the cure time before we leave. Outdoor work around Glenboig depends on the weather, as sealant needs a dry surface, so external jobs may need to move if the day turns wet. Indoor work goes ahead whatever the weather.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
How to prepare
- Keep children and pets away from the work area
- Mention any leaks or damp you’ve noticed
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand, and we will come back to you with a quote.
Related advice
Glenboig 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. The west of Scotland is wetter than the east, which means the mastic around older windows and doors has to cope with a lot of rain.
If you let a flat or house near Gartcosh station, any sash windows need sound mastic to keep draughts and rain out. Managing a site like Buchanan High School? Then the mastic around its windows and doors needs looking after like any other building’s.
Glenboig is about 3 miles north of Coatbridge, in North Lanarkshire. If you need sand mastic in Glenboig, it’s easy to get a quote: please drop us a line at info@mrmastic.co.uk. We cover North Lanarkshire from our Crawley base. Glenboig is one of 89 towns and villages in North Lanarkshire where we work for sand mastic. We also work in Glasgow, about 9 miles from Glenboig.
Our applicators cover all of the ML5 postcode area for sand mastic. We cover properties on Main Street, Rockbank Crescent and Carrick Place. Other places close to Glenboig include Marnoch (1 mile west), Gartcosh (2 miles west), Muirhead (2 miles west), Coatbridge (3 miles south) and Bargeddie (3 miles south-west). We also work in nearby towns such as Motherwell (7 miles south), Cumbernauld (4 miles north-east), Airdrie (3 miles south-east), Wishaw (9 miles south-east), Bellshill (5 miles south) and Kilsyth (6 miles north).
Local landmarks in Glenboig
For rail, the closest station is Gartcosh station, roughly 1.5 miles west of the centre. Other landmarks nearby include Monklands Hospital (2.5 miles south-east) and Glasgow Fort (4 miles south-west). The countryside around Glenboig includes Gadloch and Bar Hill.
Surface by surface
Stone surrounds
Stone surrounds suit sand mastic well. The finish blends with the masonry.
Brick reveals
Loose mastic comes out and deep gaps are packed before the new mastic goes in.
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Keep sills and gutters clear so water drains away
- Sort the mastic before the decorators arrive
- Find out about consent before window work on a listed home
- Avoid patching sand mastic with silicone
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall so early renewal protects both.
What we are called out for in Glenboig
Some old mastic was never deep enough. A thin layer doesn’t hold well, which is why we pack deep voids first and get the depth right.
It’s worth asking for a quote if you see:
- Wind and rain getting in round a sash window
- Cement or filler used on old window joints that has cracked
- Old sand mastic that has cracked, crumbled or fallen out
- Mastic round period door frames that has failed
In the older streets around Church Of Scotland, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Comparing quotes
- Which colour the sealant will be
- How long the guarantee is
- What the cure time is
- What the quote includes, VAT included or not
Questions from Glenboig
Is Glenboig in your area for sand mastic?
Yes. Our work covers the whole of Scotland, and Glenboig is part of that. Just drop us a line at info@mrmastic.co.uk with a few details of the job, and we’ll send you a clear quote.
Is Glenboig within the area you cover?
Yes. Glenboig is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
What is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It combines sand with a linseed-oil-based binder.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
Is sand mastic better than silicone for my windows?
Sand mastic normally suits period timber windows best. On modern frames, we’d normally use a flexible sealant.
When will the new mastic be hard?
It takes a while. The skin forms first, and the full set comes later and we’ll give you an idea for your job.
How long does the job take?
As a guide, most jobs take a few hours for a single window, longer for several. Bigger jobs take longer, and we will say how long yours will take.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us.
How we quote for sand mastic
The price is agreed before any work begins. It takes into account:
- Whether the work is at height
- The product the joint needs
- The old material and how stubborn it is
- Whether there’s mould to deal with
The cost depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- Photos by email, if that is easy
- How we’d reach the joints
- Roughly how big the job is
- Whether it’s a home or a business
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Nearby places to Glenboig
Other services in Glenboig
Why act early in Glenboig
New sash windows are a major, costly change and on a listed home, consent may be needed. Where the frames are in good order, new mastic seals the surround. In an older home around Glenboig, damp from a failed joint can get into timber and plaster.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
What you get with us
- We never seal over old sealant
- Tidy, careful work
- We’re fully insured
- More than 20 years in sealant work
See what affects the cost and customer reviews.