North Lanarkshire · Scotland
Sand Mastic in Hirst
Sand mastic for Hirst and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Patchy fillers round a sash window
- Tired mastic found when preparing windows for paint
- Failed mastic on an exposed elevation
Sand mastic in Hirst: local notes
Many older homes in Scotland have sash and case windows, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
In and around Hirst, as anywhere, good sand mastic starts with a clean, dry, properly prepared joint.
Hirst is about 6 miles east of Airdrie, in North Lanarkshire. For sand mastic in and around Hirst, please drop us a line at info@mrmastic.co.uk for a quick quote. We cover North Lanarkshire from our Crawley base. Across North Lanarkshire, we cover 89 places, Hirst among them. For nearby work, see our Glasgow page (18 miles or so).
We work across the ML7 postcode area for sand mastic and the streets around it. We cover properties on South Hirst Road and Hirst Road. Close by, we work in Eastfield (2 miles east), Shotts (2 miles south), Salsburgh (2 miles west), Harthill (3 miles east) and Torbothie (3 miles south-east). Larger places within reach include Motherwell (8 miles south-west), Cumbernauld (10 miles north-west), Coatbridge (8 miles west), Airdrie (6 miles west), Wishaw (7 miles south-west) and Bellshill (9 miles west).
Local landmarks in Hirst
Hirst’s nearest station is Shotts station, about 2.3 miles south of the centre. Nearby you’ll also find Shotts Heritage Centre (2.3 miles south) and Murdostoun Castle (4.6 miles south-west). For a walk, there’s Black Loch.
How we handle sand mastic in Hirst
A silicone bead around a sash window can look out of place and isn’t always the right material. Sand mastic is the traditional choice, and we can replace one with the other. Typical jobs include crumbling sand mastic round a window and gaps where the frame meets the masonry, across period & listed homes, tenement windows and timber door frames.
Across smaller places in Scotland, homes range from stone and harled cottages to newer houses, many standing in the open. Wind-driven rain finds any gap around a frame or sill.
You are covered for a year from the day we finish. If there’s a problem with it, please send an email to info@mrmastic.co.uk.
- Place
- Hirst (ML7)
- Wider area
- North Lanarkshire
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
How the visit works
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours per window, depending on the condition of the joints. Outside jobs in Hirst need a dry day, because sealant will not bond to a wet joint, so external jobs may need to move if the day turns wet. Work indoors is not affected.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Plan for the work area to be out of bounds to pets and children
- Tell us about any water getting in
Getting a quote
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we will come back to you with a quote.
Read more
DIY sealant or a professional job?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Plan mastic work ahead of painting
- Find out about consent before window work on a listed home
- Inspect the joints round the windows every year or so
- Avoid patching sand mastic with silicone
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens.
What else we do in Hirst
Hirst questions
Do you cover smaller places like Hirst?
Yes, Hirst is covered. We work across all of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Shotts station?
Yes. We work for landlords and agents as well as householders, and several properties can be quoted together. You can drop us a line at info@mrmastic.co.uk with the details for a clear quote.
Is sand mastic better than silicone for my windows?
For period timber windows in stone or brick, sand mastic is often the better fit. Modern frames normally suit a flexible sealant, and we will explain why.
Do you remove the old sealant?
Yes, every time. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Do you have insurance?
Yes. We’re fully insured, and we can confirm the details when we quote.
Can you seal over the old sealant?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
What we can’t put right
We will always be straight with you, so here’s what new sealant will not do:
- Putty and glazing repairs
- Sashes that need overhauling
- Decayed frames that need repair
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we will tell you honestly.
Surfaces we seal
- Stone surrounds
- Brick reveals
- Tenement windows
- Sash and case windows
- Period & listed homes
- Timber door frames
How the job changes by surface
Brick reveals
We rake out the old mastic and pack deep voids before pointing.
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
Leave it or put it right?
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic is the traditional material and blends with the stone or brick. In a place like Hirst, small leaks are easy to put off, but water behind a failed seal does the most damage when nobody’s watching.
The cost reflects the work involved, not guesswork. That is why we ask about the job first and give you a clear price before we start.
Why us?
- We’re fully insured
- Domestic, commercial and hotel work
- Old sealant always removed completely
- A 12-month guarantee on all work
Read what affects the cost or our reviews.
What we are called out for in Hirst
Paint, silicone or cement used over old mastic causes problems. They do not move with the timber and we normally remove them.
Any of these means the joints need attention:
- Mastic dropping out of the joint
- Open joints round the window box
- Draughty sash windows at the surround
- Weathered mastic on the most exposed windows
Letting a property close to Shotts station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Questions to ask before booking
- Whether all the old sealant comes out first
- Whether VAT is included
- What happens if they find a problem under the old sealant
- What product goes in the joint