South Lanarkshire · Scotland
New-build mastic & snagging in Scottish Borders, South Lanarkshire
Plot mastic for developers and snagging failed sealant in new homes in Scottish Borders, with a one-year guarantee on every job. Ask us for a quote.
- Worktop and upstand sealant coming away
- Sealant that never bonded to the surface
- Sealant work across a run of new homes
New build mastic for homes and businesses in Scottish Borders
For builders and developers, we work through plots to the schedule you give us. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over. If you’re dealing with new-build shower sealant that has already split and sealant applied over dusty or wet surfaces, we can help, on show homes, bathrooms & en suites and plot handovers alike.
New homes in smaller Scottish places are often single plots, self-builds or small developments. They need their sealant and floor joints finished just as carefully as on a big site.
There’s a 12-month guarantee on every job, large or small.
- Place
- Scottish Borders (ML12)
- Region
- South Lanarkshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Scottish Borders: your questions answered
Is new build mastic in Scottish Borders guaranteed?
All our work, in Scottish Borders and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Do you cover smaller places like Scottish Borders?
Yes, Scottish Borders is covered. We work across all of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I’m a tenant. Can you help?
We’re happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Can you do plot mastic on a new development?
Yes. We take on second-fix sealant work across new plots. Good preparation keeps snagging to a minimum.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. Indoors, that normally means someone at home.
Why has my new-build shower seal failed already?
It’s common, and there are generally two reasons: the house moving as it dries, and sealant that never bonded properly. A proper reseal deals with both.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Joints and finishes in Scottish Borders homes
Many new homes in Scotland are timber-framed, so skirting and sealant joints can open up as the building settles.
Around Scottish Borders, as everywhere, new build mastic is only as good as the preparation behind it. For jobs in and around Scottish Borders, choosing the right material for each joint is as important as a tidy finish.
Scottish Borders is about 22 miles south-east of Carluke, in South Lanarkshire. Wherever you are in the ML12 postcode area, we can carry out new build mastic at your property. Our South Lanarkshire coverage runs to 139 places, and Scottish Borders is one of them. Our Edinburgh page covers work nearby.
Postcode districts we cover here for new build mastic: ML12. Being close to the A701, Scottish Borders is easy for our applicators to reach. Neighbouring places we cover for new build mastic include Broughton (7 miles north), Coulter (7 miles north-west), Biggar (8 miles north-west), Skirling (9 miles north) and Symington (9 miles north-west).
What’s near Scottish Borders
In Scottish Borders, that means homes and buildings near Crook Inn and the streets around them. Well-known places in the area include Oliver Castle (0.9 miles south-west). Green spaces nearby include Glenwhappen Rig.
Landlords, agents and businesses in Scottish Borders
If you manage several properties in or around Scottish Borders, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
What affects the cost of new build mastic
Call for a quick quote. What matters most is:
- Whether old sealant or filler has to be cut out
- Mould in or behind the old joints
- Access and height
- The number of rooms or windows
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What to tell us for a quote
You do not need to know the technical terms. It helps if you can tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
- How we’d reach the joints
- If someone has resealed it before
For new build mastic in Scottish Borders, send an email to info@mrmastic.co.uk. Tell us what the problem is and where, and you will get a clear quote before we start.
The process
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and clear up. Most jobs take a few hours for most snagging lists, longer for a run of plots. In smaller Scottish places, parking is normally less of an issue than access and distance. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- First we work through your snagging list or plot schedule with you.
- We cut out every bit of the failed or messy sealant.
- Surfaces are cleaned of building dust and primed where needed.
- We apply a sealant that suits each joint and tool it to a neat finish.
- Each area is checked and left with its cure time.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Mention if the joints have been sealed before
- Clear items away from the joints we’re working on
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Advice
Why it’s worth doing now in Scottish Borders
A quick bead over the top of the old sealant can look fine at first, but it can’t bond to what’s underneath. Taking it all out and starting again is the only way to get a lasting seal. 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.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, drop us a line at info@mrmastic.co.uk for an honest opinion and a quote.
Why choose Mr Mastic in Scottish Borders
- Anti-fungal sanitary silicone in wet areas
- Domestic, commercial and hotel work
- 4.9 on Google from 180+ five-star reviews
- Old sealant always removed completely
Take a look at how sealant jobs are priced and what customers say.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Some sealant jobs are within reach of a careful DIYer, 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.
How the job changes by surface
Windows and doors
The gap between a new frame and its plaster reveal often opens up. We remove cracked sealant and apply a flexible one.
Show homes
In a show home, the sealant is on display. We lay neat, even beads in colours to suit the finishes.
Other services in Scottish Borders
Aftercare tips
Good habits help new joints last longer. A few tips:
- Don’t seal over failed sealant yourself
- Use the extractor fan every time you shower
- Look at the sealant regularly in the first couple of years
- Act quickly if a seal starts to leak
Avoid standing on the rim of the bath or the edge of the tray. If a bath or tray moves when you stand in it, get it looked at.
A seal that splits early is often a sign of movement. Getting it resealed properly, and any movement checked, stops it recurring.