West Dunbartonshire · Scotland
Duntocher External Mastic
Problem with your movement joints in Duntocher? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Joints pointed up with cement by mistake
- Gaps where render, brick and frames meet
- Brick movement joints where the sealant has split
Outside joints around Duntocher
Duntocher is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on movement joints and outside wall joints, especially on the side facing the sea. The west of Scotland is wetter than the east, so there’s plenty of rain for movement joints and outside wall joints to keep out.
Letting a property close to Kilpatrick station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Duntocher is about 1 mile north of Clydebank, in West Dunbartonshire. We provide external mastic to householders, landlords and businesses in Duntocher and nearby. Duntocher is one of 31 places in West Dunbartonshire where we work. For nearby work, see our Glasgow page, about 8 miles away.
We work across the G81 postcode area for external mastic. Streets in the area include Farm Road, Heather Avenue and Greenside Road, all of which we cover. Nearby, we also carry out external mastic in Hardgate (1 mile south-east), Clydebank (1 mile south), Faifley (1 mile south-east), Old Kilpatrick (2 miles west) and Dalmuir (2 miles south). We also work in nearby towns such as Dumbarton (6 miles west), Alexandria (8 miles north-west), Crosslet (5 miles west), Balloch (8 miles north-west), Dalreoch (6 miles west) and Kirktonhill (6 miles west).
Near you in Duntocher
The closest station to Duntocher is Kilpatrick station, about 1.5 miles south-west of the centre. Well-known places in the area include Renfrew Museum (3.9 miles south) and Erskine Castle (2.5 miles west). Open spaces near Duntocher include Dalnottar hill and Cochno Loch.
External mastic for homes and businesses in Duntocher
For buildings in Duntocher, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. We work on copings & trims, façade panels and joints between brick and frames, and people most often call us about weeds or debris growing in open joints and damp patches traced to an open external joint.
Stone walls need a stone-friendly sealant, as acetoxy products can attack some stone. On newer homes, the movement joints and roofline trims are what need watching.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Place
- Duntocher (G81)
- Wider area
- West Dunbartonshire
- Cover
- 12 months on all our work
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
How it works
You don’t need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the work takes a few hours for a handful of joints, longer for a whole elevation in most cases. Around Duntocher, 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.
- 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.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
- Move anything stored near the joints
Getting a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.
Advice
Honest limits
In fairness, some problems need a different trade:
- Adding movement joints to masonry that has none
- Structural movement, which needs a surveyor or engineer
- Cracked brickwork or render that needs a builder or plasterer
If you’re not sure, just email us at info@mrmastic.co.uk and we will give you a straight answer.
Where we work in Duntocher
- Render & cladding joints
- Copings & trims
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
Landlord and commercial work in Duntocher
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured for the work.
Quotes for external mastic in Duntocher
Your quote is based on your job. We take into account:
- Whether the work is at height
- The product the joint needs
- The size of the job
- Any mould that needs treating
Combining jobs into one visit usually makes better use of the time than several visits. We will send you a clear quote for the lot.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- The type of property
- The problem you’ve noticed
- Pictures of the joints, sent by email
- Access, such as stairs, a lift or height
For external mastic in Duntocher, send an email to info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
What we’re called out for in Duntocher
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it cannot stretch and tears as soon as the joint widens.
Look out for any of the following:
- Failed seals between different materials
- Moss and dirt in joints with no sealant left
- Sealant that has lost its bond to the brick or render
- Rigid filler in a joint that should flex
Schools such as Clydebank High School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Comparing quotes
- Which sealant they’ll use, and why
- Whether they’re fully insured
- Who does the work, and how experienced they are
- Whether all the old sealant comes out first
How the job changes by surface
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it and keep the sealant to the right depth.
Render joints
Render has movement joints and stop beads that need sealing. We reseal them with a flexible exterior sealant that suits the render colour.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Leave the joints unpainted unless we have said otherwise
- Keep soil, plants and ivy away from the joints
- Tell anyone working on the walls about the movement joints
- Wash walls gently around the sealant
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
FAQs for Duntocher
Do you cover smaller places like Duntocher?
Yes, we do. 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.
Is external mastic in a coastal place like Duntocher any different?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we’re using and why.
Can you seal joints between render and window frames?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Do you work for landlords and businesses?
Yes, we do. We work in homes, commercial premises and hotels.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Can new sealant go over the old?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
How long before the joint can be used?
Different products cure at different speeds, so please follow the time we give you.