Falkirk · Scotland
Grangemouth External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Grangemouth and across Falkirk. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Joints with sealant missing in places
- Leaking joints around cladding and façade panels
- Weathered mastic that no longer stretches
How we handle external mastic in Grangemouth
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. We pick a colour that sits well with the wall so the joint doesn’t stand out. If you have water getting into walls through failed joints and joints pointed up with cement by mistake, we can help, on joints between brick and frames, render & cladding joints and copings & trims alike.
Scottish weather is hard on outside joints, and a town like Grangemouth gets its share of wind and rain. A gap in a gutter joint, fascia trim or wall joint soon lets damp in.
Big or small, you get the same 12-month guarantee in Grangemouth and across Falkirk.
- Location
- Grangemouth (FK3, EH51)
- Region
- Falkirk
- Guarantee
- A year, on every job
- Quotes
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
How it works
You don’t need to clear the whole room or building before we come, just the space around the work. We protect the rest, and the job takes anything from a few hours to several days, depending on the building in most cases. Parking around Grangemouth is rarely difficult, though older streets in the centre can be tight. If you are in a flat with a shared stair or a door entry system, let us know when you book.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Let us know if you’ve seen damp or leaks
- Let us know about earlier repairs to the joints
Getting a quote
For external mastic in Grangemouth, email us at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Advice
Nearby places to Grangemouth
What else we do in Grangemouth
What affects the cost of external mastic
The quote reflects the job in front of us. We look at:
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
- How easy the joints are to reach
- How many areas need sealing
What it costs depends on the amount of work, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
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:
- How we’d reach the joints
- Photos by email, if that’s easy
- Where the job is, and your postcode
- What’s wrong with the joints now
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, email us at info@mrmastic.co.uk.
External mastic in Grangemouth: local notes
Grangemouth is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. Plenty of Scottish homes have harled walls, and joints where harling meets other materials need a sealant that can grip and flex.
Rented homes near Polmont station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. If you live in an older home near Sacred Heart Rc Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Grangemouth is about 11 miles south-east of Stirling, in Falkirk. Whether you are in the middle of Grangemouth or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. We cover 50 towns and villages across Falkirk, large and small. There’s also a page for Edinburgh, roughly 20 miles from Grangemouth.
We cover every part of the FK3 and EH51 postcode area for external mastic. External mastic is available to properties on York Square, Station Road and Burnfoot Court. Main roads around Grangemouth include the A904 and A905. Neighbouring places we cover for external mastic include Glensburgh (1 mile north-west), Skinflats (2 miles north-west), Bainsford (3 miles west), Carronshore (3 miles north-west) and Falkirk (3 miles west). Within a short drive, we also cover Bo'ness (4 miles east), Larbert (4 miles west), Stenhousemuir (4 miles west), Denny (7 miles west), Bonnybridge (7 miles west) and Bantaskin (3 miles west). As one of the bigger places in Falkirk, Grangemouth has every kind of property, from flats to offices.
What’s near Grangemouth
Around Grangemouth, our work takes us to homes and buildings near Graeme High School, among other places. The nearest railway station is Polmont station, about 1.7 miles south of the centre. Other landmarks nearby include Kinneil House (3.4 miles east) and Grangemouth Museum (0.6 miles east). Green spaces nearby include Callendar Lake.
Different surfaces, different methods
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. We prime where the product needs it.
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
Signs you need external mastic in Grangemouth
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
People normally contact us after spotting one of these:
- Joints pointed up with cement by mistake
- Failed sealant between panels on a façade
- Water getting into walls through failed joints
- Joints with sealant missing in places
Managing a site like Beancross Primary School? Then larger buildings have long runs of movement joint that eventually need resealing.
Questions to ask before you book
- How the surfaces are prepared before sealing
- What guarantee comes with the work
- Whether you can choose the colour
- Who does the work, and how experienced they are
What happens if it’s left?
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. If you live in a flat in Grangemouth, failed sealant can send water to the neighbours below, and that’s much harder to put right.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why book with us
- White, clear, grey or another colour, product permitting
- One-year guarantee on every job
- Sanitary silicone with an anti-fungal additive in wet areas
- Old sealant always removed completely
Take a look at what affects the cost or what customers say.
Grangemouth: your questions answered
Do you cover Grangemouth for external mastic?
Yes, Grangemouth is within the area we cover. Our work covers the whole of Scotland. Just send an email to info@mrmastic.co.uk with a few details of the job.
Is external mastic in a coastal place like Grangemouth any different?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
How long before the joint can be used?
Different products cure at different speeds, so please follow the time we give you when we finish.
How do I get a quote for external mastic in Grangemouth?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we will talk you through it.
Why do you put foam in the joint first?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding so the bead can stretch.
How long does the job take?
A typical job takes a few hours to a few days, depending on the length of joint and the access. Your quote will say how long we expect yours to take.
Why is there a gap in my brick wall?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
Can I add another job to the visit?
Yes, we can. More than one area can be quoted together.
Keeping the joints in good condition
A little care helps the new joints last. We recommend:
- Deal with leaking gutters that soak the joints below
- Point out the joints to other trades
- Check external joints each spring
- Keep movement joints as flexible joints, not mortar
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal.