South Lanarkshire · Scotland
Window Mastic in Brocketsbrae
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Brocketsbrae. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Gaps where the sill meets the wall
- Untidy mastic left by window fitters
- A bead that doesn’t match the frame
Can I do it myself?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
How we handle window mastic in Brocketsbrae
Colour matters on a frame. We can seal in white, brown, anthracite grey, black or clear, so the bead blends with the window rather than framing it. Common call-outs are for rain getting in at the frame or under the sill and draughty joints inside around the window, across window sills, patio & French doors and aluminium frames.
Across smaller places in Scotland, homes range from stone and harled cottages to newer houses, many standing in the open. Exposed frames and sills take the full force of wind-driven rain, so the mastic there works hard.
All our work comes with a one-year guarantee.
- Location
- Brocketsbrae (ML11)
- Region
- South Lanarkshire
- Cover
- One year on every job
- Quote
- A clear price before work begins
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Also near Brocketsbrae
Other services in Brocketsbrae
What happens if it’s left?
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. A reseal is a much smaller job. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
The cost depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start.
Why us?
- 20+ years of sealant experience
- 12-month guarantee on every job
- Homes, businesses and hotels
- Approved under the ARBOMaster scheme
Read our cost guide and customer reviews.
When it is not the sealant
New sealant can’t fix everything, and we’d rather say so up front. It won’t solve:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Penetrating damp from a failed cavity tray or render
- Worn gaskets, brush seals or a door that has dropped
Not sure which it is? You can email us at info@mrmastic.co.uk and we will tell you honestly.
Surfaces we seal
- Composite doors
- Aluminium frames
- Timber windows & doors
- Window sills
- uPVC windows
- Patio & French doors
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. In total, it usually takes a few hours for a few frames, or a day or more for a whole house. Outside jobs in Brocketsbrae need a dry day, because sealant won’t bond to a wet joint, so external jobs may need to move if the day turns wet. Indoor work goes ahead whatever the weather.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
Getting ready for the visit
- Clear items away from the joints we are working on
- Try not to wet indoor joints just before the visit
- Keep children and pets away from the work area
Ask for a quote
We quote each job on its own, so the first step is telling us about yours. Simply drop us a line at info@mrmastic.co.uk and describe the job and send pictures if you have them.
Related advice
Windows and doors in Brocketsbrae
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, and the joint between the box frame and the stone or render is traditionally pointed with sand mastic.
If you let a flat or house near Lanark station, renewing tired window mastic between tenants heads off draught and damp complaints. If you live in an older home near Lesmahagow Old Parish Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Brocketsbrae is about 7 miles south of Carluke, in South Lanarkshire. For window mastic in and around Brocketsbrae, please email us at info@mrmastic.co.uk for a quick quote. We are based in Crawley and cover South Lanarkshire, Brocketsbrae included. Our area takes in 139 places across South Lanarkshire, large and small. We also work in Glasgow, about 22 miles from Brocketsbrae.
We cover every part of the ML11 postcode area for window mastic. Neighbouring places we cover for window mastic include Devonburn (1 mile south-east), Lesmahagow (1 mile west), Dillarburn (1 mile north), New Trows (1 mile south-west) and Auchenheath (3 miles north). Further out, we also cover East Kilbride (15 miles north-west), Hamilton (12 miles north-west), Uddingston (15 miles north-west), Blantyre (14 miles north-west), Larkhall (8 miles north-west) and Carluke (7 miles north).
Near you in Brocketsbrae
Brocketsbrae’s nearest station is Lanark station, about 4.6 miles north-east. Other landmarks nearby include Birkwood Castle (0.8 miles south-west) and Corra Castle (3.8 miles east). The countryside around Brocketsbrae includes Black Hill.
How to look after the new joints
Good habits help new joints last longer. A few tips:
- Ventilate rooms so frames don’t stay wet inside
- Don’t paint over the silicone
- Keep jet washers away from the mastic
- Repaint timber before it’s bare
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. A new joint closes it up.
Your questions about window mastic in Brocketsbrae
Do you cover Brocketsbrae for window mastic?
Yes, Brocketsbrae is within the area we cover. We work across all of Scotland. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing, and we’ll give you a clear quote.
Can you help a landlord with a rental near Lanark station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just drop us a line at info@mrmastic.co.uk with the address and what needs doing, and we’ll give you a clear price.
Where is Mr Mastic based?
Our base is Crawley. Our area covers South East England, London and Scotland.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.
Can I add another job to the visit?
Of course. Combining jobs makes good use of the visit.
Do you work on first-floor windows?
Yes, where they can be reached safely. Let us know about access when you ask for a quote so we can plan the job.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
Can new sealant go over the old?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
What affects the cost of window mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Whether the work is at height
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
- The type of sealant required
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we’ll explain the quote if you ask.
Helping us quote
To help us quote quickly, let us know:
- The rough size of the job
- If it’s domestic, commercial or a hotel
- Photos by email, if that is easy
- The address or postcode of the job
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will talk you through the work and send you a clear quote.
Common problems we fix in Brocketsbrae
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, and a gap opens along one edge.
People generally contact us when they notice one of these:
- Old mastic that has gone black or come away
- Gaps left after new windows were fitted
- White mastic on grey or black frames
- Gaps where the sill meets the wall
For site and facilities teams at buildings such as Lesmahagow High School, larger buildings have plenty of frames, and the mastic around each one ages.
What to look for in a quote
- How the surfaces are prepared before sealing
- Whether you can choose the colour
- What guarantee comes with the work
- Who does the work, and how experienced they are