Argyll and Bute · Scotland
Upper Kilchattan External Mastic
External mastic in Upper Kilchattan from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Hard, crazed mastic that has stopped moving
- Rigid filler in a joint that should flex
- Plants rooting in failed movement joints
Different surfaces, different methods
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
How we handle external mastic in Upper Kilchattan
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the line blends in. We work on render & cladding joints, façade panels and joints between brick and frames, and common reasons people get in touch are rain getting behind render or cladding at a joint and weathered mastic that no longer stretches.
Outside joints can only be sealed when they’re dry, so work in Upper Kilchattan depends on the weather. Tell us how to reach each wall, gutter and roofline.
Every job comes with a 12-month guarantee, wherever you are in Argyll and Bute.
- Place
- Upper Kilchattan (PA61)
- Wider area
- Argyll and Bute
- Cover
- One year on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Walls and rooflines in Upper Kilchattan
Upper Kilchattan is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. Harled (roughcast) walls are common in Scotland, and where harling meets frames, pipes and other materials, the joint needs a flexible sealant that grips a rough surface.
In and around Upper Kilchattan, as anywhere, good external mastic starts with a clean, dry, properly prepared joint. If you live in an older home near St Cathan's Chapel, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Upper Kilchattan is in Argyll and Bute. Every kind of property in Upper Kilchattan can book us for external mastic, old or new, large or small. The work is guaranteed for a year. We cover 118 towns and villages across Argyll and Bute. Our Glasgow page covers work nearby.
Postcode districts we cover here for external mastic: PA61. You will find Upper Kilchattan on the B8086, which makes it straightforward to reach. Nearby, we also carry out external mastic in Scalasaig (1 mile south-east), Bunnahabhain (14 miles south), Bunessan (16 miles north), Ardtun (16 miles north) and Port Askaig (17 miles south). Remote and island addresses need a little more planning, so please mention your location when you email us at info@mrmastic.co.uk.
What’s near Upper Kilchattan
Other landmarks nearby include The Old Waiting Room (1.3 miles south-east). For a walk, there’s Càrnan Eoin and Loch Fada.
FAQs for Upper Kilchattan
Can you do external mastic in Upper Kilchattan?
Yes. Our work covers the whole of Scotland, and Upper Kilchattan is part of that. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing.
Will you come out to Upper Kilchattan?
Yes, Upper Kilchattan is covered. Our work covers the whole of Scotland, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you do several jobs on one visit?
Yes. Just list everything you need and we’ll quote it together.
What colours does the sealant come in?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin.
Can you reach joints on upper floors?
It depends on the building. We work on joints that can be reached safely. Tell us about the building and we’ll confirm what access is needed.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first.
Is it OK to fill a movement joint with cement?
No. Cement or mortar can’t stretch. Where a joint has been mortared, it can often be raked out and sealed properly.
Will there be a smell?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
DIY sealant or a professional job?
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.
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.
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Make sure movement joints aren’t pointed over
- Show decorators and builders where the movement joints are
- Walk round the building once a year and look at the joints
- Clear growth from the base of walls and joints
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
Places near Upper Kilchattan
Also in Upper Kilchattan
Why deal with it now?
Mortar or ordinary filler might look like a quick way to close an open joint, but it locks the joint solid. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. In a place like Upper Kilchattan, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
Combining jobs into one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Why us?
- Sealant colour chosen to suit
- Approved under the ARBOMaster scheme
- Domestic, commercial and hotel work
- You choose the colour before work begins
Take a look at our cost guide or what customers say.
What affects the quote in Upper Kilchattan
For a quick quote, just ask. The main things that affect it are:
- How many areas need sealing
- How much old sealant there is and how hard it is to remove
- The type of sealant required
- Mould in or behind the old joints
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, drop us a line at info@mrmastic.co.uk for an honest opinion and a quote.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- The problem you’ve noticed
- Any access issues, like height or stairs
- Any previous sealing or DIY work
- Where the job is, and your postcode
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will explain what’s involved before giving you a price.
What happens on the day
Good joint work is mostly preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a handful of joints, longer for a whole elevation. Outside jobs in Upper Kilchattan need a dry day, because sealant will not bond to a wet joint, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Try not to wet indoor joints just before the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know if you’ve seen damp or leaks
Get a quote
Need a quote? Please send an email to info@mrmastic.co.uk and tell us about the job. We’ll explain what we’d do and give you a clear price before work begins.