Scottish Borders · Scotland
External Mastic in Gattonside
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Gattonside and across the Scottish Borders. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Water getting into walls through failed joints
- Failed seals between different materials
- Failed sealant between panels on a façade
Gattonside questions
Is Gattonside in your area for external mastic?
Yes. We work across all of Scotland, and Gattonside is part of that. You can drop us a line at info@mrmastic.co.uk and tell us what needs doing, and we will send you a clear quote.
Do you cover smaller places like Gattonside?
Yes, Gattonside is covered. Our work covers the whole of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Gattonside and the rest of the Scottish Borders, along with the rest of our area.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We will tell you what we’re using and why.
Do you use backing rod?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
How do you reach high-level joints?
It depends on the building. Send us pictures and a rough idea of the height and we’ll confirm how they can be reached safely.
How often do external joints need resealing?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away.
Is it OK to fill a movement joint with cement?
No. Cement or mortar can’t stretch. Where a joint has been mortared, it can often be raked out and sealed properly.
About our external mastic in Gattonside
On houses, flats and commercial buildings across Gattonside, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean joint faces and the right depth. Common call-outs are for damp patches traced to an open external joint and sealant pulling away from one side of the joint, on joints between brick and frames, concrete & block and copings & trims.
In and around a place like Gattonside, many buildings face open ground and take the full weather. Gutter joints and wall joints take a battering, so they need a sealant that moves with the building.
Every job is covered by a 12-month guarantee.
- Place
- Gattonside (TD6)
- Wider area
- Scottish Borders
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Also near Gattonside
Also in Gattonside
What external mastic looks like in Gattonside
Plenty of Scottish homes have harled walls, 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 sound outside sealant is part of that.
Around Gattonside, as everywhere, external mastic is only as good as the preparation behind it.
Gattonside is about 3 miles east of Galashiels, in the Scottish Borders. Homes, rented property, offices and hotels in Gattonside can book us for external mastic. Every job comes with our one-year guarantee. Our the Scottish Borders coverage runs to 89 places, and Gattonside is one of them. We also work in Edinburgh, around 30 miles away.
Jobs for external mastic in TD6 works the same way as everywhere else we cover. Streets in the area include The Loan, Priors Road and Monkswood. Nearby, we also carry out external mastic in Melrose (1 mile south), Darnick (1 mile south-west), Newstead (1 mile south-east), Tweedbank (2 miles west) and Langlee (2 miles west). We also work in nearby towns such as Galashiels (3 miles west), Hawick (13 miles south), Kelso (11 miles east), Selkirk (6 miles south-west), Jedburgh (11 miles south-east) and Wilton (13 miles south).
What’s near Gattonside
For rail, the closest station is Tweedbank station, roughly 1.3 miles west. Well-known places in the area include Melrose Motor Museum (0.5 miles south-east) and Castle Holydean (3 miles south). For a walk, there’s Eildon Hill North and Bemersyde Moss.
What affects the quote in Gattonside
For a quick quote, just ask. What matters most is:
- Which sealant suits the joint
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
- How many rooms, windows or areas are involved
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Helping us quote
To help us quote quickly, let us know:
- Whether it has been sealed before
- Roughly how big the job is
- Whether it’s a home or a business
- Where the job is, and your postcode
For a quote, send an email to info@mrmastic.co.uk and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.
Do you need external mastic in Gattonside?
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it cannot stretch and tears as soon as the joint widens.
These are the problems we’re asked about most:
- Rain getting behind render or cladding at a joint
- Gaps where render, brick and frames meet
- Movement joints with cracked, split or missing sealant
- Leaking joints around cladding and façade panels
If you let a flat or house near Tweedbank station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Comparing quotes
- What preparation is included
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
- When the joint can take water or movement
Different surfaces, different methods
Cladding and façade panels
Cladding and façade panels are generally separated by sealed joints. We reseal them with a sealant suited to the panel material.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
What we do, step by step
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours to a few days, depending on the length of joint and the access, and the area is left clean. Outside jobs in Gattonside need a dry day, because sealant will not bond to a wet joint, so an outdoor job can move if the forecast changes. Work indoors isn’t affected.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any previous sealing or DIY attempts
- Mention any tricky access
How to get a quote
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 send photos if you have them.
Related advice
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Point out the joints to other trades
- Act on the first splits you see
- Keep soil, plants and ivy away from the joints
- Keep water from gutters off the wall
Do not paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint.
An open movement joint lets rain into the wall every time it pours. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
For landlords and businesses
Landlords and agents in Gattonside can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
What sealant work cannot fix
We will always be straight with you, so here’s what sealant can’t fix:
- Cracks in the bricks or render themselves, away from the joints
- Cutting new joints into brickwork, which is building work rather than sealant work
- Subsidence or other structural problems
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we will tell you honestly.
What we seal
- Façade panels
- Brickwork movement joints
- Concrete & block
- Render & cladding joints
- Copings & trims
- Joints between brick and frames