South Lanarkshire · Scotland
Window Mastic in Westwoodhill
Problem with your window and door frames in Westwoodhill? We cut out the old, prepare the joints and apply the right sealant.
- Mastic that has split away from the wall
- Sealant in the wrong colour for the frame
- Black, perished sealant on frames
Honest limits
To be straight with you, some problems need a different trade:
- Draughts through the window seals rather than the frame
- Penetrating damp from a failed cavity tray or render
- Misting between the panes of a double-glazed unit (that needs a new unit)
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we will tell you honestly before booking.
What we seal
- Patio & French doors
- Window sills
- Aluminium frames
- uPVC windows
- Composite doors
- Timber windows & doors
Window mastic in Westwoodhill
There are two joints on most windows. The external joint is the weather seal; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. We work on composite doors, patio & French doors and window sills, and the jobs we see most are leaking joints at the ends of sills and cracked internal joints between frame and plaster.
Mastic can only go onto a dry joint, so outside work in Westwoodhill depends on the weather. Let us know about access to every frame, including any upstairs.
The work is covered for a year after we finish. If anything is not right with it, email us at info@mrmastic.co.uk.
- Where
- Westwoodhill (G75, G74)
- Wider area
- South Lanarkshire
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Towns and villages near Westwoodhill
Also in Westwoodhill
Leave it or put it right?
Getting a straight, even bead on an outside frame takes practice, especially on upper floors. A professional job is cut out properly, backed where needed and finished neatly, in a sealant suited to the wall. Out of town in Scotland, exposed walls take a lot of weather, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, send an email to info@mrmastic.co.uk and we will give you an honest view and a quote.
Why us?
- 20+ years of sealant experience
- Full insurance on every job
- You choose the colour before work begins
- White, clear, grey or coloured to suit, where the product allows
Take a look at what affects the cost and our reviews.
Common problems we fix in Westwoodhill
Every frame moves through the day. Sun on a frame makes it expand, and it contracts again overnight, while the masonry beside it stays put. If the sealant can’t stretch, it splits.
The problems people usually mention when they call include:
- Old mastic that has gone black or come away
- Damp patches on the reveal after heavy rain
- Draughty joints inside around the window
- Untidy mastic left by window fitters
For landlords with property near Hairmyres station, renewing tired window mastic between tenants heads off draught and damp complaints.
Questions to ask before you book
- What the quote includes, VAT included or not
- How long to leave it before use
- How the joint is cleaned and prepared
- Which colour the sealant will be
Frames and glazing around Westwoodhill
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.
Schools such as Duncanrig Secondary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Westwoodhill is about 1 mile south-west of East Kilbride, in South Lanarkshire. We provide window mastic to homes and businesses in Westwoodhill and nearby. Our area takes in 139 places across South Lanarkshire. Our Glasgow page covers work nearby (7 miles or so).
Every address in G75 and G74 is within our area for window mastic, from the main roads to the quietest streets. Window mastic is available to properties on Oak Avenue, Ash Avenue and Darwin Road. Nearby, we also carry out window mastic in Newlandsmuir (1 mile south-west), Mossneuk (1 mile west), Hairmyres (1 mile west), College Milton (1 mile north) and Gardenhall (1 mile west). Larger places within reach include Hamilton (6 miles east), Cambuslang (5 miles north-east), Uddingston (7 miles north-east), Blantyre (5 miles north-east), Larkhall (9 miles east) and Carluke (14 miles east).
Near you in Westwoodhill
The closest station to Westwoodhill is Hairmyres station, roughly 1.2 miles north-west of the centre. A little further out are Mains Castle (1.7 miles north) and Hairmyres Hospital (0.8 miles north-west). The countryside around Westwoodhill includes Cathkin Braes.
The process
There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The work itself takes a few hours for a few frames, or a day or more for a whole house from start to finish. In smaller Scottish places, parking is usually less of an issue than access and distance. Tell us how to find the property and how to reach the work.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
How to prepare
- Mention any parking rules near the property
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
Ask for a quote
Need a quote? Please email us at info@mrmastic.co.uk and tell us about the job. We’ll explain what we’d do and send you a clear quote before any work starts.
Related advice
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Keep timber frames painted
- Don’t use solvent cleaners on the joint
- Do not paint over the silicone
- Ventilate rooms so frames don’t stay wet inside
Silicone cannot generally be painted, so if you’re planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
How the job changes by surface
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We seal the frame and let you know about anything else.
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so a flexible sealant is essential. We seal onto sound, dry paintwork or timber.
DIY versus a professional finish
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
FAQs for Westwoodhill
Is Westwoodhill in your area for window mastic?
Yes. Our work covers the whole of Scotland, and Westwoodhill is part of that. Just send an email to info@mrmastic.co.uk with a few details of the job.
Will you come out to Westwoodhill?
Yes, Westwoodhill is covered. Our work covers the whole of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you work on commercial sites?
Yes. Larger jobs can be planned room by room or area by area.
Can you reach windows above the ground floor?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we’ll confirm what’s needed.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Can you seal the gap between the frame and the plaster indoors?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We do one or both.
Do you guarantee window mastic?
Yes. All our work carries a 12-month guarantee, and we’re fully insured.