North Lanarkshire · Scotland
Sand mastic for sash & case windows in Hareshaw, North Lanarkshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Hareshaw. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic worn away on windows facing the weather
- Mastic round period door frames that has failed
- Old cement repairs round a window that have failed
Sand mastic for homes and businesses in Hareshaw
Silicone on a period window often looks wrong and is not always the right material. Sand mastic is the traditional choice and we can swap the silicone for it. Typical jobs include crumbling sand mastic round a window and silicone on a period window that looks wrong, on period & listed homes, timber door frames and stone surrounds.
Many older Scottish homes still have timber windows set into stone walls. The sealant has to suit the stone, which rules out acetoxy silicones that can mark or attack it.
A 12-month guarantee comes as standard, so you are not left on your own once the job is done.
- Location
- Hareshaw (ML1)
- Wider area
- North Lanarkshire
- Cover
- A year, on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Keep modern sealant off the mastic
- Ask the planning authority about consent for listed or conservation-area homes
- Sort the mastic before the decorators arrive
- Keep sills and gutters clear so water drains away
Don’t run silicone over the new mastic. If anything cracks, get it looked at before trying a quick fix.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
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 for a single window, longer for several. Outside jobs in Hareshaw need a dry day, because sealant won’t bond to a wet joint, so an outdoor job can move if the forecast changes. Work indoors is not affected.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Mention any tricky access
- For business premises, tell us about site rules or sign-in
- Tell us about any water getting in
Getting a quote
To get a quote, email us at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Advice
Hareshaw homes and the weather
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that. Sash and case windows are common in older Scottish homes, often pointed into the wall with traditional sand mastic.
Rented homes near Cleland station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Hareshaw is about 4 miles north of Wishaw, in North Lanarkshire. Every kind of property in Hareshaw can book us for sand mastic, old or new, large or small. Every job comes with our one-year guarantee. Across North Lanarkshire, we cover 89 places, Hareshaw among them. You can also see our page for Glasgow, roughly 15 miles from Hareshaw.
Here we cover the ML1 postcode area for sand mastic. If you need sand mastic at a property on Wilsons Road and Hareshaw Road or anywhere close by, we can help. Close by, we work in Biggar Road (1 mile south-west), Newarthill (1 mile south-west), Cleland (2 miles south), Chapelhall (2 miles north-west) and Gartness (3 miles north-west). Larger places within reach include Motherwell (4 miles south-west), Cumbernauld (9 miles north-west), Coatbridge (5 miles west), Airdrie (4 miles north-west), Wishaw (4 miles south) and Bellshill (5 miles west).
Landmarks near Hareshaw
Hareshaw’s nearest station is Cleland station, roughly 1.6 miles south. Nearby you’ll also find Murdostoun Castle (2.4 miles south-east) and Cleland Hospital (1.7 miles south). Open spaces near Hareshaw include Baron's Haugh RSPB Reserve and Allanton House lake.
Landlords, agents and businesses in Hareshaw
If you manage several properties in or around Hareshaw, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
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.
What the job involves on each surface
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Sash and case windows
On a sash window, the mastic joint shows on the outside, so a neat, even finish matters.
When something else is needed
We won’t take on work that won’t last, so here’s what sealant can’t put right:
- Timber that has rotted
- Crumbling stone or brickwork round the window
- Sashes that need overhauling
If you’re not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer.
Where we work in Hareshaw
- Stone surrounds
- Period & listed homes
- Brick reveals
- Tenement windows
- Sash and case windows
- Timber door frames
Also near Hareshaw
Also in Hareshaw
Hareshaw questions
Do you cover Hareshaw for sand mastic?
Yes. We work across all of Scotland, and Hareshaw is part of that. Just email us at info@mrmastic.co.uk with a few details of the job.
I let a flat near Cleland station. Can you help?
Yes, landlords and agents are among the people we work for. You can send an email to info@mrmastic.co.uk with the details for a clear quote.
How long does sand mastic take to go off?
It skins over fairly quickly but takes longer to harden fully. We will explain what to expect before we leave.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Is it possible to take out silicone and use sand mastic instead?
Yes, it’s a common request. All the old silicone is removed first so the mastic beds in well.
Can you match the sealant colour?
Most of the time, yes. We’ll explain which colours are available.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Which is right for my windows, sand mastic or modern sealant?
Sand mastic generally suits period timber windows best. Modern frames normally suit a flexible sealant, and we’ll explain why.
When to call us in Hareshaw
Paint, silicone or cement used over old mastic causes problems. They don’t suit the joint, and they usually need raking out.
Most people get in touch after spotting something like this:
- Failed mastic on an exposed elevation
- Patchy fillers round a sash window
- Crumbling sand mastic round a window
- Silicone on a period window that looks wrong
If you look after a building such as Brannock High School, larger buildings have plenty of frames, and the mastic around each one ages.
Before booking anyone
- What happens if the job turns out different
- How long the guarantee is
- Who does the work, and how experienced they are
- Is the old sealant removed completely?