South Lanarkshire · Scotland
Sand mastic for sash & case windows in Symington, South Lanarkshire
Sand mastic for Symington, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Mastic round period door frames that has failed
- Old cement repairs round a window that have failed
- Modern sealant on a period surround
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Clear gutters so water does not pour onto the windows
- Have rotten timber repaired before new mastic goes in
- Ask us before painting near the mastic
- Look over the window mastic once a year
Check the mastic when you check the paintwork. Catching cracks early keeps repairs small.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
How we handle sand mastic in Symington
We renew sand mastic around sash windows and doors set in stone or brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. We work on timber door frames, brick reveals and period & listed homes, and the jobs we see most are draughts and rain around sash boxes and failed mastic on an exposed elevation.
Older stone-built homes in Scotland often have sash and case or timber windows set in stone. The sealant has to suit the stone, which rules out acetoxy silicones that can mark or attack it.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Location
- Symington (ML12)
- Region
- South Lanarkshire
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
What else we do in Symington
DIY versus a professional finish
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Symington: your questions answered
Is Symington in your area for sand mastic?
Yes, Symington is within the area we cover. We work across all of Scotland. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing, and we will give you a clear price.
What guarantee comes with sand mastic in Symington?
All our work, in Symington and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Do the sealants smell?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area.
Can you quote for more than one area?
Yes. Just list everything you need.
What should I tell you?
A short description and the location, with photos by email if possible. We will ask anything else we need to know.
Do you work for landlords and businesses?
Yes, we do. We work in homes, commercial premises and hotels.
Is consent needed for window work on a listed home?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.
Work for landlords, hotels and businesses
For anyone letting property in or around Symington, several properties can be quoted together. Send us the addresses and the work at each.
We also work for property managers and facilities teams in Symington and across South Lanarkshire. We can quote a run of properties together, and we are fully insured for the work.
Symington 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.
Homes close to Symington Parish Church include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Symington is about 13 miles south-east of Carluke, in South Lanarkshire. Anywhere in ML12, we cover sand mastic for homes and businesses. Across South Lanarkshire, we cover 139 places, Symington among them. There’s also a page for Edinburgh, roughly 28 miles from Symington.
Every address in ML12 is within our area for sand mastic, from the main roads to the quietest streets. We cover properties on Main Street, School Road and Abington Road. We also cover the places around Symington: Coulter (2 miles south-east), Thankerton (2 miles north-west), Wiston (3 miles south-west), Quothquan (3 miles north) and Covington (3 miles north-west). We also work in nearby towns such as Carluke (13 miles north-west), Lanark (9 miles north-west), Lesmahagow (12 miles west), Law (15 miles north-west), Kirkmuirhill (13 miles west) and Forth (12 miles north).
Around Symington
Locally, jobs take us to homes and businesses close to Culter Library and Reading Room, among other places. Well-known places in the area include Fatlips Castle (1.8 miles south-west) and Kello Hospital (3.3 miles north-east).
When to call us in Symington
Timber frames move with the seasons. That movement opens up the mastic joint over time.
The most common problems we see are:
- Draughty sash windows at the surround
- Mastic round period door frames that has failed
- Old sand mastic that has cracked, crumbled or fallen out
- Mastic that needs renewing before redecorating
Around Symington, as everywhere, sand mastic is only as good as the preparation behind it.
What to look for in a quote
- Is the old sealant removed completely?
- What guarantee comes with the work
- What product goes in the joint
- What happens if the job turns out different
What the job involves on each surface
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. It’s renewed by hand.
Why it’s worth doing now in Symington
New sash windows are a major, costly change, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Out of town in Scotland, exposed walls take a lot of weather, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we’ll talk you through it.
Why choose Mr Mastic in Symington
- Any old sealant cut out fully, not covered over
- Approved under the ARBOMaster scheme
- Sanitary silicone with an anti-fungal additive in wet areas
- 4.9 on Google from 180+ five-star reviews
Take a look at what affects the cost and what customers say.
How the visit works
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. It normally takes a few hours for a single window, longer for several. Somewhere like Symington may be a longer drive, and the journey is planned ahead. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- On commercial sites, let us know about site rules
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about stairs, lifts or work at height
Getting a quote
Want a quote for sand mastic? Please email us at info@mrmastic.co.uk and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.