Angus · Scotland
External & façade joints in Letham, Angus
External mastic for Letham, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Water getting into walls through failed joints
- Weeds or debris growing in open joints
- Brick movement joints where the sealant has split
When to call us in Letham
Some movement joints have been pointed up with mortar, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
The most common problems we see are:
- Weeds or debris growing in open joints
- Failed sealant between panels on a façade
- Weathered mastic that no longer stretches
- Joints with sealant missing in places
In the older streets around Old Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Comparing quotes
- How hidden problems are handled
- Whether you can choose the colour
- How long to leave it before use
- Whether VAT is included
About our external mastic in Letham
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. If you have movement joints filled with mortar instead of sealant and weeds or debris growing in open joints, we can put it right, on façade panels, render & cladding joints and copings & trims alike.
External sealant needs dry surfaces, so outdoor work around Letham is planned around the weather, and longer journeys are planned in advance. Let us know about access to every wall and roofline.
Big or small, you get the same 12-month guarantee.
- Where
- Letham (DD8)
- Wider area
- Angus
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Different surfaces, different methods
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so the movement is taken up.
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind and helps it last.
What we do, step by step
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a few hours for a handful of joints, longer for a whole elevation, depending on how much there is to do. In smaller Scottish places, parking is normally less of an issue than access and distance. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Preparing for the visit
- Keep pets and children clear of the area while we work
- Let us know about parking restrictions
- Let us know if you’ve seen damp or leaks
Get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Advice
Landlord and commercial work in Letham
We work for landlords and agents as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
If you manage several properties in or around Letham, jobs at different addresses can be quoted together. Send us the addresses and the work at each.
External mastic in Letham: local notes
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. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that.
In and around Letham, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Letham is about 5 miles east of Forfar, in Angus. From the centre of Letham to the outskirts, external mastic is available for homes and businesses alike. Letham is one of 40 places in Angus we cover. You can also see our page for Dundee, roughly 13 miles from Letham.
Here we cover the DD8 postcode area for external mastic. That includes homes and businesses on The Square, Kirkgait and Gardyne Street and the roads around them. Nearby, we also carry out external mastic in Craichie (2 miles south-west), Tulloes (2 miles south-west), Hillend (2 miles west), Lownie Moor (3 miles west) and Kingsmuir (3 miles west). Further out, we also cover Arbroath (8 miles south-east), Forfar (5 miles west), Carnoustie (9 miles south), Kirriemuir (9 miles west), Brechin (8 miles north-east) and Hunter's Town (9 miles south). Letham is among the bigger towns we cover in Angus.
What’s near Letham
Nearby you’ll also find Whitehills Hospital (4.1 miles west) and Balgavies Castle (1.9 miles north). Not far away are Balgavies Loch.
What we cannot put right
New sealant cannot fix everything, and we’ll tell you before work begins. It will not solve:
- Movement that’s more than a sealant joint can take
- Cracks in the bricks or render themselves, away from the joints
- Failed render or damaged cladding panels
If you’re not sure, just send an email to info@mrmastic.co.uk and we will give you a straight answer before you book.
Surfaces we seal
- Façade panels
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
Looking after it afterwards
Aftercare is simple:
- Get split or bare joints resealed while the damage is small
- Avoid pressure-washing directly into sealant joints
- Keep soil, plants and ivy away from the joints
- Point out the joints to other trades
Do not let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years.
How we quote for external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- When we can work, for business premises
- Mould in or behind the old joints
- The number of rooms or windows
- How much old sealant there is and how hard it is to remove
Leaving a failed joint normally makes the job bigger, not smaller. If you’re unsure, send an email to info@mrmastic.co.uk and we will give you an honest view and a quote.
Asking for a quote
Before you ask for a quote, have a think about:
- Where the job is, and your postcode
- A few pictures by email, if you can
- Roughly how big the job is
- Whether it has been sealed before
For external mastic in Letham, send an email to info@mrmastic.co.uk. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
What else we do in Letham
Your questions about external mastic in Letham
Is Letham in your area for external mastic?
Yes. Our work covers the whole of Scotland, and Letham is part of that. Just send an email to info@mrmastic.co.uk with a few details of the job.
What guarantee comes with external mastic in Letham?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Do you do commercial work?
Yes. We can plan bigger jobs in stages.
Is it messy?
Very little: the area around the joints is protected first, and we tidy up before we go.
Can you seal joints between render and window frames?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
How much does external mastic cost in Letham?
It depends on the job, so we quote each one individually. For a quick quote, drop us a line at info@mrmastic.co.uk and let us know what needs doing and where.
How long before the joint can be used?
Cure times vary by product and the temperature. Before we leave, we’ll tell you the cure time.