Argyll and Bute · Scotland
Ardchattan Window Mastic
Window mastic across Ardchattan and nearby, with old sealant always removed completely and a one-year guarantee.
- Cracked internal joints between frame and plaster
- Cracked sealant at the sill ends
- Mastic that has split away from the wall
Can I do it myself?
A careful DIYer can reseal a simple joint, 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.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
About our window mastic in Ardchattan
A window frame and the wall around it expand and shrink at different rates. Heat and cold make frames grow and shrink against brick or render that hardly moves. So the sealant has to stretch and recover, which is why we use a low-modulus product. If you have cold air getting in at the frame edge and water coming in at the bottom corners of a door, we can put it right, on patio & French doors, aluminium frames and uPVC windows alike.
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.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Ardchattan (PA37)
- Region
- Argyll and Bute
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What sealant work can’t fix
Before you book, it’s worth knowing the limits:
- Damp coming through the wall itself rather than the frame joint
- A failed sealed unit that has misted up
- Faulty window hardware
Not sure which it is? You can email us at info@mrmastic.co.uk and we will tell you honestly before you book.
Where we work in Ardchattan
- Timber windows & doors
- Patio & French doors
- Aluminium frames
- Window sills
- Composite doors
- uPVC windows
What happens if it’s left?
A quick bead over the top of old mastic looks like an easy fix, but new sealant can’t bond to old, crumbling mastic. It soon lifts and the leak carries on behind it. The old mastic has to come out. In an older home around Ardchattan, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please email us at info@mrmastic.co.uk and we’ll talk you through it.
Why book with us
- Any old sealant cut out fully, not covered over
- Colour picked to suit the job
- Colour agreed with you before we start
- Anti-fungal silicone where joints get wet
Take a look at our cost guide or customer reviews.
What we do, step by step
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and clear up. It normally takes a few hours for a handful of frames, longer for a whole house. In smaller Scottish places, parking is generally 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 confirm safe access to each frame.
- All the failed sealant is cut away.
- Frame and wall are cleaned and must be dry before sealing.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Move anything stored near the joints
- Keep children and pets away from the work area
How to get a quote
There’s no standard price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, email us at info@mrmastic.co.uk.
Read more
Windows and doors in Ardchattan
Ardchattan is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around window and door frames, especially on the side facing the sea. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
If you live in an older home near Ardchattan Parish Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Ardchattan is about 40 miles north-west of Helensburgh, in Argyll and Bute. We carry out window mastic for householders, landlords and businesses in Ardchattan and nearby, as part of our work across Argyll and Bute. Our Argyll and Bute coverage runs to 118 places, and Ardchattan is one of them. You can also see our page for Glasgow, about 60 miles away.
Here we cover the PA37 postcode area for window mastic. We cover properties on Dunlora and Achnacree Bay View. Close by, we work in Black Crofts (1 mile south-west), North Connel (2 miles south-west), Connel (2 miles south-west), Benderloch (2 miles north-west) and Dunbeg (4 miles south-west). Remote and island addresses need a little more planning, so tell us where you are when you ask for a quote.
Landmarks near Ardchattan
The closest station to Ardchattan is Connel Ferry station, about 1.6 miles south-west. Well-known places in the area include Dunstaffnage Castle (3.1 miles south-west). The countryside around Ardchattan includes Lochan Dubh.
Signs you need window mastic in Ardchattan
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
If you can see any of these, it’s time to have the joints looked at:
- Black, perished sealant on frames
- Damp patches on the reveal after heavy rain
- Untidy mastic left by window fitters
- Cracked sealant at the sill ends
Letting a property close to Connel Ferry station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Before you book anyone
- How the joint is cleaned and prepared
- Are they insured?
- Whether they seal over old material or remove it
- How long the guarantee is
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Avoid blasting the frames with a pressure washer
- Keep drainage slots and sill grooves clear
- Paint up to the joint, not over it
- Do not use solvent cleaners on the joint
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. A new joint closes it up.
Work for landlords, hotels and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Nearby places to Ardchattan
Also in Ardchattan
Your questions about window mastic in Ardchattan
Will you come out to Ardchattan?
Yes, we do. We work across all of Scotland, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Does the coastal weather in Ardchattan affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages.
Can I paint over the new sealant?
Most silicone cannot be painted. Let us know beforehand, and we’ll use a paintable product where it suits.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you when we finish.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Can you do upstairs windows?
Normally, yes. We plan safe access before the job, so mention the height and anything in the way.
How many windows can you do in a day?
A few frames take a few hours, while a whole house takes longer. You’ll get a timescale with the quote.