Falkirk · Scotland
External & façade joints in Denny, Falkirk
Problem with your movement joints in Denny? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Sealant pulling away from one side of the joint
- Moss and dirt in joints with no sealant left
- Water getting into walls through failed joints
External mastic in Denny, done properly
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where mortar or filler would crack. We work on render & cladding joints, concrete & block and joints between brick and frames, and common reasons people get in touch are leaking joints around cladding and façade panels and brick movement joints where the sealant has split.
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.
Each job carries a 12-month guarantee.
- Where
- Denny (FK6)
- Region
- Falkirk
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Aftercare tips
After the cure time, these simple habits help:
- Show decorators and builders where the movement joints are
- Look over the joints every year, ideally after winter
- Have failed joints looked at early
- Check the sealant is paintable before painting near it
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
Denny: your questions answered
Do you work for landlords with property near Larbert station?
Yes, we work for landlords and letting agents. You can email us at info@mrmastic.co.uk with the address and a few details, and we will give you a fixed price before any work starts.
Do you cover Denny for external mastic?
Yes, Denny is within the area we cover. Our work covers the whole of Scotland. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing.
Should I point up the gap in my brickwork?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose. We’ll reseal it with a flexible sealant.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint.
Will the old sealant be removed?
Yes, every time. New sealant will not bond properly to old, so the joint is cleaned back first.
Can you match the colour of my brickwork?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. There’s a wide choice of exterior colours.
How often do external joints need resealing?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Our work comes with a 12-month guarantee.
What’s an expansion joint in brickwork?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
What happens if it’s left?
Running new sealant over the old bead rarely lasts. The new layer can’t bond properly to old, weathered material, so the old joint is cut out fully first. Around Denny, water from a failed joint in an older stone home can soak into timber and plaster.
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Why book with us
- We agree the colour with you first
- ARBOMaster approved applicator
- Arbo and Everbuild products
- Sanitary silicone with an anti-fungal additive in wet areas
The process
On the day, we start by going over the job with you, so you know exactly what we’re doing. Surfaces next to the work are protected before any work begins. The work usually takes anything from a few hours to several days, depending on the building. For a place like Denny, longer drives are planned in advance. Mention tracks, gates, ferries or anything else about the route.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- Old sealant and any debris are cut and raked out.
- 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
- Plan for the work area to be out of bounds to pets and children
- Tell us about any previous sealing or DIY attempts
- Clear the area around the work
How to get a quote
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we will talk you through the work and give you a clear price.
Advice
Landlords, agents and businesses in Denny
For anyone letting property in or around Denny, several properties can go on one quote. Send us the addresses and the work at each, and pictures by email help.
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
What the job involves on each surface
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. Backing rod sized to the joint sets it so the sealant is not too deep.
Render joints
Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.
Towns and villages near Denny
What else we do in Denny
What sealant work cannot fix
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Failed render or damaged cladding panels
- Cracking across the wall rather than at a joint
- Damp that is not coming from the joint
If you’re not sure, just drop us a line at info@mrmastic.co.uk and we’ll give you a straight answer.
Joints and surfaces we work on
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
- Copings & trims
- Façade panels
- Brickwork movement joints
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Walls and rooflines in Denny
Plenty of Scottish homes have harled walls, and joints where harling meets other materials need a sealant that can grip and flex. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
Managing a site like Denny High School? Then larger buildings have long runs of movement joint that eventually need resealing. If you let a flat or house near Larbert station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Denny is about 5 miles west of Falkirk, in Falkirk. We provide external mastic to homes and businesses in Denny and the surrounding area. Across Falkirk, we cover 50 places, Denny among them. Glasgow is on our list too, around 18 miles away.
Jobs for external mastic in FK6 works the same way as everywhere else we cover. If you need external mastic at a property on Overton Crescent, Little Denny Road and Anderson Drive or a nearby road, we can help. Denny sits on or near the A872 and A883, which makes travel easy. Neighbouring places we cover for external mastic include Head of Muir (1 mile south), Stoneywood (1 mile north-west), Dunipace (1 mile north), Dennyloanhead (1 mile south) and Fankerton (1 mile north-west). Larger places within reach include Falkirk (5 miles east), Grangemouth (7 miles east), Bo'ness (12 miles east), Larbert (3 miles east), Stenhousemuir (4 miles east) and Bantaskin (4 miles east). Being one of Falkirk’s larger places, Denny has every kind of property, from flats to offices.
Around Denny
The nearest railway station is Larbert station, roughly 3.2 miles east of the centre. Well-known places in the area include Forth Valley Royal Hospital (2.5 miles east) and Herbertshire Castle (0.7 miles north). Not far away are Myot Hill.