Stirling · Scotland
External Mastic in Gartmore
Problem with your movement joints in Gartmore? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Panel joints letting water in
- Joints with sealant missing in places
- Sealant that has lost its bond to the brick or render
External mastic in Gartmore, done properly
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing and we use one wherever it does. Typical jobs include cracked joints where brick meets render or frames and joints pointed up with cement by mistake, on façade panels, brickwork movement joints and joints between brick and frames.
Outside joints can only be sealed when they’re dry, so work in Gartmore depends on the weather, and longer journeys are planned in advance. Tell us how to reach each wall, gutter and roofline.
Each job carries a 12-month guarantee.
- Location
- Gartmore (FK8)
- Region
- Stirling
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Different surfaces, different methods
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.
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best.
Leave it or put it right?
Resealing a run of joints in one go is usually better than patching one at a time. They’ve weathered the same way. Out of town in Scotland, exposed walls take a lot of weather, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Why book with us
- Sealant colour chosen to suit
- Over 20 years’ experience
- Anti-fungal silicone where joints get wet
- Domestic, commercial and hotel work
Outside joints around Gartmore
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that. Gartmore is in the west of Scotland, which is wetter than the east, which means movement joints and outside wall joints has to cope with a lot of rain.
Homes close to Gartmore Parish Church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Gartmore is about 15 miles north-east of Dumbarton, in Stirling. Every kind of property in Gartmore can book us for external mastic. The work is guaranteed for a year. Across Stirling, we cover 55 places, and Gartmore is one of them. For nearby work, see our Glasgow page, about 20 miles away.
All of FK8 is covered for external mastic. That includes homes and businesses on Main Street, Park Avenue and Jellicoe Avenue and the roads around them. We also cover Aberfoyle (2 miles north), Buchlyvie (4 miles south-east), Kinlochard (5 miles north-west), Balfron (5 miles south) and Arnprior (6 miles east). Within a short drive, we also cover Callander (9 miles north-east), Killearn (7 miles south), Strathblane (11 miles south), Doune (13 miles east), Kippen (8 miles east) and Drymen (6 miles south-west).
Around Gartmore
Other landmarks nearby include Duchray Castle (3 miles north-west). The countryside around Gartmore includes Lake of Menteith and Craigmore.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Ask before painting over external sealant
- Check external joints each spring
- Have failed joints looked at early
- Tell anyone working on the walls about the movement joints
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Act while the splits are small. Then it’s a straightforward cut-out and reseal before water has had years to get in.
The process
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes anything from a few hours to several days, depending on the building. Around Gartmore, distance and access matter more than parking. Let us know how to find you and how to reach the joints, and the visit is planned around that.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Clear items away from the joints we’re working on
- On commercial sites, let us know about site rules
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
If you’re in Gartmore and need external mastic, email us at info@mrmastic.co.uk. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
Related advice
Landlords, agents and businesses in Gartmore
If you manage several properties in or around Gartmore, several properties can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Towns and villages near Gartmore
What else we do in Gartmore
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
- Any mould that needs treating
- Whether the work is at height
- How much old sealant there is and how hard it is to remove
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, send an email to info@mrmastic.co.uk for an honest opinion and a quote.
Asking for a quote
Before you ask for a quote, have a think about:
- If it’s domestic, commercial or a hotel
- A few photos by email, if you can
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
Every job is quoted individually. Simply send an email to info@mrmastic.co.uk and describe the job, and pictures are welcome.
Questions from Gartmore
Is there a guarantee on external mastic in Gartmore?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Is Gartmore in your area for external mastic?
Yes. We work across all of Scotland, and Gartmore is part of that. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces, primed where needed.
Do you work at height?
It depends on the building. Where joints can be reached safely, we’ll do them. Give us some details and we will confirm the access.
Do you use backing rod?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Do you work for letting agents?
Yes. We work for homeowners, landlords, letting agents, businesses and hotels across Stirling.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status.
Will it make a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
Signs you need external mastic in Gartmore
Using the wrong sealant is another common reason. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, so it pulls away from the edges.
Signs it’s time to call us include:
- Hard, crazed mastic that has stopped moving
- Gaps where render, brick and frames meet
- Leaking joints around cladding and façade panels
- Sealant that has lost its bond to the brick or render
Around Gartmore, as everywhere, external mastic is only as good as the preparation behind it.
What to look for in a quote
- Are they insured?
- How much experience the applicator has
- Is the old sealant removed completely?
- Whether VAT is included