West Dunbartonshire · Scotland
Window Mastic in Ardlui
We cover Ardlui for mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Gaps where the sill meets the wall
- Hard, cracked sealant around windows
- A bead that does not match the frame
Window mastic in Ardlui, done properly
A window frame and the wall around it expand and shrink at different rates. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. So the sealant has to stretch and recover, which is why we use a low-modulus product. If you have cracked internal joints between frame and plaster and cracked or shrunken mastic around the frame, we can put it right, whatever the surface.
Mastic can only go onto a dry joint, so outside work in Ardlui depends on the weather, and longer journeys are planned in advance. Tell us about access to all the windows and doors, upstairs included.
We stand behind the work with a one-year guarantee, so you’re covered after we’ve gone.
- Where
- Ardlui (G83)
- Wider area
- West Dunbartonshire
- Guarantee
- One year on every job
- Price
- A clear price before we start
- info@mrmastic.co.uk
- Updated
- 26 October 2026
What happens on the day
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. Around Ardlui, distance and access matter more than parking. Let us know how to find you and how to reach the joints, and the visit is planned around that.
- 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.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
Getting ready for the visit
- Tell us about any water getting in
- Move anything stored near the joints
- Mention any parking rules near the property
Getting a quote
If you’re in Ardlui and need window mastic, send an email to info@mrmastic.co.uk. Tell us what the problem is and where, and we will agree the price before any work begins.
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Honest limits
To be straight with you, some problems need a different trade:
- Damp problems in the wall away from the window
- A failed sealed unit that has misted up
- A sash or casement that will not close properly
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we’ll tell you honestly.
Joints and surfaces we work on
- Aluminium frames
- Patio & French doors
- Window sills
- uPVC windows
- Timber windows & doors
- Composite doors
FAQs for Ardlui
Do you work for landlords with property near Ardlui station?
Yes, we work for letting agents and landlords. Just drop us a line at info@mrmastic.co.uk and tell us about the property, and we’ll send you a clear quote.
Do you cover smaller places like Ardlui?
Yes. Ardlui is within the area we cover, which takes in towns, villages and rural addresses. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
Are you insured?
Yes, we are fully insured for domestic and commercial work.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
How long will my window job take?
That depends on the number of frames, how they’re reached and the state of the old mastic. We’ll tell you how long your job needs when we quote.
Can new sealant go over the old?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
Can you do upstairs windows?
Yes, in most cases. Access is planned before we start.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
How we quote for window mastic
For a quick quote, just ask. What matters most is:
- How easy the joints are to reach
- Working hours on commercial sites
- Any mould that needs treating
- How many areas need sealing
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re unsure, email us at info@mrmastic.co.uk for an honest opinion and a quote.
Asking for a quote
To make quoting easier, please include:
- A few photos by email, if you can
- How we’d reach the joints
- What’s wrong with the joints now
- The rough size of the job
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved and send you a clear quote.
Nearby places to Ardlui
Also in Ardlui
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Avoid harsh chemicals near the mastic
- Repaint timber before it’s bare
- Use gentle cleaners on frames and sealant
- Avoid blasting the frames with a pressure washer
Keep the new mastic undisturbed while it cures, following the cure time we give you. Don’t point a pressure washer at the joints.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Ardlui homes and the weather
The west of Scotland is wetter than the east, which means the mastic around window and door frames has to cope with a lot of rain. Many older homes in Scotland have sash and case windows, often pointed into the wall with traditional sand mastic.
Rented homes near Ardlui station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. In and around Ardlui, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
Ardlui is about 20 miles north of Helensburgh, in West Dunbartonshire. Whether you’re in the middle of Ardlui or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. 31 places in West Dunbartonshire are on our list, from the larger towns to small villages. We also work in Glasgow, about 35 miles from Ardlui.
Our applicators cover all of the G83 postcode area for window mastic. If you are just outside Ardlui, we cover Inverarnan (2 miles north), Succoth (6 miles south), An Tairbeart (6 miles south), Tarbet (6 miles south) and Arrochar (7 miles south).
Near you in Ardlui
For rail, the closest station is Ardlui station, about 0.6 miles north-west of the centre. Well-known places in the area include Island I Vow Castle (1.4 miles south-east). The countryside around Ardlui includes Geal Loch.
Surface by surface
uPVC windows
We clean the frame edge carefully so the plastic is not marked, then the new bead is laid against the frame and the wall and tooled smooth.
Patio & French doors
Not every patio door leak is a mastic problem: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We check before we reseal.
Landlords, agents and businesses in Ardlui
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
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.