Stirling · Scotland
Tyndrum External Mastic
Movement joints in Tyndrum need attention? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Joints with sealant missing in places
- Moss and dirt in joints with no sealant left
- Old sealant gone brittle and cracked
How we handle external mastic in Tyndrum
Getting the depth right is half the job. 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. We work on render & cladding joints, joints between brick and frames and façade panels, and people most often call us about rain getting behind render or cladding at a joint and movement joints filled with mortar instead of sealant.
Outside joints can only be sealed when they’re dry, so work in Tyndrum depends on the weather. Tell us how to reach each wall, gutter and roofline.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Tyndrum (FK20)
- Wider area
- Stirling
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What we are called out for in Tyndrum
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
These are the problems we’re asked about most:
- Rigid filler in a joint that should flex
- Joints where the bead has come unstuck
- Weeds or debris growing in open joints
- Panel joints letting water in
Around Tyndrum, as everywhere, external mastic is only as good as the preparation behind it.
What your quote should include
- How much experience the applicator has
- What the cure time is
- What happens if they find a problem under the old sealant
- Whether they seal over old material or remove it
What external mastic looks like in Tyndrum
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. Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that.
For landlords with property near Tyndrum Lower station, outside joints that have cracked can let damp into a rental, so check them between lets.
Tyndrum is about 30 miles north of Helensburgh, in Stirling. Every kind of property in Tyndrum is covered for external mastic. The work is guaranteed for a year. Across Stirling, we cover 55 places, and Tyndrum is one of them. Glasgow is on our list too, around 44 miles away.
Work in FK20 works the same way as everywhere else we cover. Neighbouring places we cover for external mastic include Clifton (1 mile north-west), A' Chrìon Làraich (5 miles south-east), Bridge of Orchy (6 miles north), Inverarnan (8 miles south) and Ardlui (10 miles south).
Near you in Tyndrum
Tyndrum has its own railway station: Tyndrum Lower station. Not far away are Lochan na Bì.
Why it’s worth doing now in Tyndrum
A failed movement joint lets water into the wall and can run behind render or cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. In a place like Tyndrum, small leaks are easy to put off, but water behind a failed seal does the most damage when nobody’s watching.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Why Tyndrum customers choose us
- Sanitary silicone with an anti-fungal additive in wet areas
- Old sealant always removed completely
- We agree the colour with you first
- A choice of colours where the product allows
Read what affects the cost or what customers say.
Nearby places to Tyndrum
Other services in Tyndrum
Landlord and commercial work in Tyndrum
Landlords and letting agents in Tyndrum can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
What affects the quote in Tyndrum
Every job gets its own quote. These are the things that affect it:
- How many areas need sealing
- Whether there’s mould to deal with
- Whether old sealant or filler has to be cut out
- How easy the joints are to reach
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, drop us a line at info@mrmastic.co.uk for an honest opinion and a quote.
What we need to know
Before you ask for a quote, have a think about:
- Photos by email, if that’s easy
- Roughly how big the job is
- The address or postcode of the job
- Any previous sealing or DIY work
We quote each job on its own, so the first step is telling us about yours. Simply send an email to info@mrmastic.co.uk and describe the job, and photos are welcome.
FAQs for Tyndrum
Do you cover Tyndrum for external mastic?
Yes. Our work covers the whole of Scotland, and Tyndrum is part of that. Just send an email to info@mrmastic.co.uk with a few details of the job, and we’ll send you a clear quote.
Is Tyndrum within the area you cover?
Yes, Tyndrum is covered. Our work covers the whole of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
Is it OK to fill a movement joint with cement?
No, not if it’s a movement joint. Pointing it stops it working and can lead to cracking. We will reseal it with a flexible sealant.
Do you work at height?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher work, tell us about the building and we’ll confirm what’s needed.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
Will the new joint stand out?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin from the range available.
How do I get a quote for external mastic in Tyndrum?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we’re using.
How the visit works
We keep the work tidy and contained to the joints we are treating, so you can get on with your day. Expect the work to take anything from a few hours to several days, depending on the building, and we explain the cure time before we leave. Outdoor work around Tyndrum depends on the weather, as sealant needs a dry surface, so external jobs may need to move if the day turns wet. Work indoors isn’t affected.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- 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
- Keep pets and children clear of the area while we work
- Tell us about access, such as stairs, a lift or high-level joints
- On commercial sites, let us know about site rules
How to get a quote
Want a quote for external mastic? Please drop us a line at info@mrmastic.co.uk and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Advice
Different surfaces, different methods
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it and keep the sealant to the right depth.