Falkirk · Scotland
External Mastic in Allandale
External mastic for Allandale, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Rain getting behind render or cladding at a joint
- Old sealant gone brittle and cracked
- Rigid filler in a joint that should flex
Landlords, agents and businesses in Allandale
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can go on one quote.
For anyone letting property in or around Allandale, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
About our external mastic in Allandale
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. 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 failed seals between different materials, we can put it right, on concrete & block, render & cladding joints and joints between brick and frames alike.
External sealant needs dry surfaces, so outdoor work around Allandale is planned around the weather. Let us know about access to every wall and roofline.
You are covered for a year from the day we finish. If anything isn’t right with it, send an email to info@mrmastic.co.uk.
- Location
- Allandale (FK4)
- Wider area
- Falkirk
- Cover
- One year on every job
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
A DIY attempt does not rule out a professional job. We cut it out and start again.
What the job involves on each surface
Copings and trims
A failed coping joint lets water into the top of the wall. Resealing them is a small job that protects a lot.
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so its sealant has to stay flexible.
What we can’t put right
We’ll always be straight with you, so here’s what sealant can’t fix:
- Walls that need new movement joints cut into them
- Subsidence or other structural problems
- Rising or penetrating damp from elsewhere in the wall
If in doubt, drop us a line at info@mrmastic.co.uk and we’ll say what we think.
What we seal
- Copings & trims
- Façade panels
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
- Brickwork movement joints
External mastic in Allandale: local notes
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that. Plenty of Scottish homes have harled walls, and joints where harling meets other materials need a sealant that can grip and flex.
Letting a property close to Cumbernauld station? Then split movement joints are easy to miss on a rental until damp shows inside. If you look after a building such as Abronhill High School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Homes close to Haggs Parish Church include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Allandale is about 4 miles north-east of Cumbernauld, in Falkirk. Wherever you are in the FK4 postcode area, we can carry out external mastic at your property. We cover 50 towns and villages across Falkirk, large and small. There’s also a page for Glasgow, roughly 16 miles from Allandale.
All of FK4 is within our area for external mastic. We cover properties on Thorndale Gardens and Antonine Gate and the roads around them. We also cover Longcroft (1 mile north), Haggs (1 mile north-west), Castlecary (1 mile south-west), Banknock (1 mile west) and Whitelees (1 mile south-west). Within a short drive, we also cover Falkirk (5 miles east), Grangemouth (8 miles east), Bo'ness (12 miles east), Larbert (5 miles north-east), Stenhousemuir (5 miles north-east) and Bantaskin (5 miles east).
Landmarks near Allandale
The nearest railway station is Cumbernauld station, roughly 3.7 miles south-west of the centre. A little further out are Cumbernauld Museum (3.7 miles south-west) and Forth Valley Royal Hospital (4 miles north-east). Open spaces near Allandale include Myot Hill.
How the visit works
On the day, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work begins. Most jobs take anything from a few hours to several days, depending on the building. Outdoor work around Allandale depends on the weather, as sealant needs a dry surface, so an outdoor job can move if the forecast changes. Work indoors isn’t affected.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- 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
- Plan for the work area to be out of bounds to pets and children
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
For a quote, send an email to info@mrmastic.co.uk with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Read more
Quotes for external mastic in Allandale
Call for a quick quote. The main things that affect it are:
- The number and length of the joints
- Access and height
- Whether there’s mould to deal with
- How many areas need sealing
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll go through it with you.
What to tell us for a quote
When you contact us, it’s useful to know:
- Whether it’s a home or a business
- What the problem is, such as mould, gaps, leaks or cracking
- How we’d reach the joints
- If someone has resealed it before
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, send an email to info@mrmastic.co.uk.
FAQs for Allandale
Do you work for landlords with property near Cumbernauld station?
Yes, rental work is part of what we do. Just drop us a line at info@mrmastic.co.uk and tell us about the property, and we will give you a clear price.
Will you come out to Allandale?
Yes, Allandale is covered. Our work covers the whole of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you use backing rod?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding, so the joint can move.
Can you seal over the old sealant?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
What information do you need?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply email us at info@mrmastic.co.uk.
How often do external joints need resealing?
It varies with how exposed the wall is and how much the joint moves. Signs to watch for are cracking, hardening and gaps at the edges and have them redone then.
What happens if it’s left?
Resealing a run of joints in one go is normally better than patching one at a time. Joints of the same age tend to fail together. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water through a failed joint keeps working away until it’s fixed.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why us?
- You choose the colour before work begins
- White, clear, grey or coloured to suit, where the product allows
- A sealant colour to suit the surroundings
- Neat joints and a tidy finish
Read what affects the cost or what customers say.