Angus · Scotland
External Mastic in Westmuir
Sealing brickwork movement joints, render, cladding and façade joints in Westmuir, with a 12-month guarantee on every job. Call for a quick quote.
- Gaps where render, brick and frames meet
- Rain getting behind render or cladding at a joint
- Rigid filler in a joint that should flex
External mastic in Westmuir, done properly
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. If you have sealant pulling away from one side of the joint and leaking joints around cladding and façade panels, we can help, whatever the surface.
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.
Big or small, you get the same 12-month guarantee.
- Location
- Westmuir (DD8)
- Wider area
- Angus
- Guarantee
- 12 months on all our work
- Quote
- A clear price before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
What affects the cost of external mastic
The quote reflects the job in front of us. We take into account:
- The type of sealant required
- How many rooms, windows or areas are involved
- Any mould that needs treating
- The number and length of the joints
The cost depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before any work starts.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Where the property is
- Roughly how big the job is
- Whether it has been sealed before
- If it’s domestic, commercial or a hotel
For a quote, send an email to info@mrmastic.co.uk with the location and a short description of the problem. We will give you a clear price before any work starts.
Landlords, agents and businesses in Westmuir
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can be quoted together.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Looking after it afterwards
How long the joints last depends on use and care. Here’s what we suggest:
- Wash walls gently around the sealant
- Deal with leaking gutters that soak the joints below
- Show decorators and builders where the movement joints are
- Never let anyone fill a movement joint with mortar
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
Leaks behind façade panels and render often go unseen. When it finally shows inside, the joint may have been open for years so early resealing is worth it.
Your questions about external mastic in Westmuir
Is external mastic in Westmuir guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Is Westmuir within the area you cover?
Yes. Westmuir is within the area we cover, which takes in towns, villages and rural addresses. We work across all of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
When will the joints need doing again?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Every job carries our 12-month guarantee.
Can new sealant go over the old?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we will explain our choice.
Do you seal joints where cladding meets other materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. The colour is chosen to suit.
How long does the job take?
As a guide, most jobs take anything from a few hours to several days, depending on the building. Larger jobs naturally take longer, and we’ll tell you how long to expect.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used.
What external mastic looks like in Westmuir
Harled (roughcast) walls are common in Scotland, 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 failed outside joints work against that.
Glamis Castle, about 3.1 miles south-east, is one of the historic houses in the wider area around Westmuir, and older homes nearby need a sealant that suits their walls.
Westmuir is about 6 miles west of Forfar, in Angus. If you need external mastic in Westmuir, it’s easy to get a quote: please email us at info@mrmastic.co.uk. We cover Angus from our Crawley base. 40 places in Angus are on our list. There’s also a page for Dundee, about 13 miles away.
We cover every part of DD8 for external mastic and the streets around it. That includes homes and businesses on Main Road, Netherton Place and Roman Road and the roads around them. Close by, we work in Kirriemuir (1 mile north-east), Maryton (2 miles east), Airlie (3 miles south-west), Padanaram (4 miles east) and Glamis (4 miles south). Further out, we also cover Forfar (6 miles east), Brechin (15 miles east), Letham (10 miles east) and Friockheim (14 miles east).
Local landmarks in Westmuir
A little further out are Balfour Castle (2.1 miles north-west) and Kirriemuir Gateway to the Glens Museum (1.4 miles north-east). Green spaces nearby include Mile Hill and Loch of Kinnordy.
Why deal with it now?
A failed movement joint lets water into the wall, behind render and cladding. Resealing early keeps the job to the joint itself, rather than the wall around it. Out of town in Scotland, exposed walls take a lot of weather, and once water gets behind a failed joint, damp in stone or harled walls is slow to dry out.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please drop us a line at info@mrmastic.co.uk.
Why us?
- White, clear, grey or another colour, product permitting
- Trusted Arbo and Everbuild sealants
- 4.9 on Google from 180+ five-star reviews
- A sealant colour to suit the surroundings
Take a look at how sealant jobs are priced or our reviews.
How the visit works
All our tools and materials come with us in the van. After a quick look at the joints together, the area is protected and the work begins. It normally takes a few hours to a few days, depending on the length of joint and the access. Outdoor work around Westmuir depends on the weather, as sealant needs a dry surface, so external jobs may need to move if the day turns wet. Indoor work goes ahead whatever the weather.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Tell us about any water getting in
- On commercial sites, let us know about site rules
Ask for a quote
For external mastic in Westmuir, email us at info@mrmastic.co.uk. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Advice
Signs you need external mastic in Westmuir
Some movement joints have been pointed up with mortar, often by someone who didn’t know what it was for. The joint cannot move, so the wall cracks somewhere else instead.
If you can see any of these, it’s time to have the joints looked at:
- Hard, crazed mastic that has stopped moving
- Joints with sealant missing in places
- Moss and dirt in joints with no sealant left
- Sealant pulling away from one side of the joint
In and around Westmuir, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
What your quote should include
- What preparation is included
- Whether the sealant suits the joint
- Who does the work, and how experienced they are
- The length of the guarantee
What the job involves on each surface
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.
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. If that is happened, we rake it out and reseal it properly where it can be done safely.