South Lanarkshire · Scotland
Roberton Window Mastic
Mastic around window and door frames, sills and patio doors for homes and businesses in Roberton and across South Lanarkshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Leaking joints at the ends of sills
- Black, perished sealant on frames
- Water coming in at the bottom corners of a door
Roberton 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. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
For an older house near a landmark such as Roberton Parish Church, the joint between an old wall and a newer frame is normally the first place rain gets in.
Roberton is about 14 miles south-east of Carluke, in South Lanarkshire. From the centre of Roberton to the outskirts, we cover window mastic for every kind of property. Our South Lanarkshire coverage runs to 139 places, and Roberton is one of them. We also work in Glasgow, about 32 miles from Roberton.
Jobs for window mastic in ML12 is quoted and booked the same way as anywhere else. Close by, we work in Wiston (2 miles north-east), Abington (3 miles south), Crawfordjohn (5 miles south-west), Symington (5 miles north-east) and Crawford (5 miles south). Further out, we also cover Carluke (14 miles north-west), Lanark (10 miles north), Lesmahagow (10 miles north-west), Biggar (8 miles north-east), Kirkmuirhill (13 miles north-west) and Forth (15 miles north).
Local landmarks in Roberton
Other landmarks nearby include Fatlips Castle (3.6 miles north-east). Open spaces near Roberton include Tewsgill Hill.
How we handle window mastic in Roberton
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through. If the draught is through the window seals instead, we’ll tell you. We work on uPVC windows, patio & French doors and aluminium frames, and the jobs we see most are white mastic on grey or black frames and gaps left after new windows were fitted.
Older stone-built homes in Scotland often have sash and case or timber windows set in stone. Those suit a traditional sand mastic or a neutral-cure sealant, not an acetoxy silicone that can attack some stone.
Our work is backed for twelve months.
- Where
- Roberton (ML12)
- Wider area
- South Lanarkshire
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Looking after it afterwards
After the cure time, these simple habits help:
- Paint up to the joint, not over it
- Keep solvents and bleach off the sealant
- Keep drainage slots and sill grooves clear
- Look round the frames every year or so
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
Draughts get worse, not better. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. Resealing closes it.
What the job involves on each surface
Composite doors
Composite doors are normally hung in an uPVC-type frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.
Window sills
Stone and concrete sills have their own joints, including the one between the sill and the frame above. We seal those with a sealant suited to masonry.
Can I do it myself?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Signs you need window mastic in Roberton
Mastic ages in the weather. Sunlight dries the surface out, and over the years it loses its give, cracks and comes away.
Any of these means the joints need attention:
- Cold air getting in at the frame edge
- Damp patches on the reveal after heavy rain
- Gaps left after new windows were fitted
- Cracked internal joints between frame and plaster
In and around Roberton, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
Before you book anyone
- What preparation is included
- What happens if the job turns out different
- Whether VAT is included
- The length of the guarantee
What happens on the day
On the day, we start by going over the job with you. We protect the surfaces around the joints before any work starts. The work normally takes most of a day for a typical house, less for a few frames. Around Roberton, distance and access matter more than parking. Tell us how to find the property and how to reach the work.
- First we look at every frame and agree the list.
- Next the failed sealant is cut away and the joint cleaned.
- Where gaps are deep, backing rod goes in first.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- We clear up and check every joint is fully closed.
Before we arrive
- Keep children and pets away from the work area
- Mention if the joints have been sealed before
- Try not to wet indoor joints just before the visit
Getting a quote
Every job is quoted individually, so the first step is telling us about yours. Just send an email to info@mrmastic.co.uk with the details and send photos if you have them.
Advice
What affects the quote in Roberton
You will get a clear quote before we start. It takes into account:
- Working hours on commercial sites
- How many rooms, windows or areas are involved
- How easy the joints are to reach
- How much there is to do
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and give you a clear quote before any work starts.
Helping us quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
- If someone has resealed it before
- Where the job is, and your postcode
We don’t publish a price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, drop us a line at info@mrmastic.co.uk.
Landlord and commercial work in Roberton
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Also in Roberton
FAQs for Roberton
Is window mastic in Roberton guaranteed?
Every job comes with our one-year guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Is Roberton in your area for window mastic?
Yes, Roberton is within the area we cover. Our work covers the whole of Scotland. You can send an email to info@mrmastic.co.uk and tell us what needs doing, and we’ll give you a clear price.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint.
Will there be a smell?
That depends on the sealant. Some smell for a while, some hardly at all.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses and we are fully insured.