Scottish Borders · Scotland
External Mastic in Gavinton
External mastic for Gavinton and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Panel joints letting water in
- Moss and dirt in joints with no sealant left
- Weathered mastic that no longer stretches
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Subsidence or other structural problems
- Failed render or damaged cladding panels
- Cracks in the bricks or render themselves, away from the joints
Not sure which it is? You can send an email to info@mrmastic.co.uk and we’ll tell you honestly before you book.
Surfaces we seal
- Render & cladding joints
- Concrete & block
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
External mastic in Gavinton, done properly
For buildings in Gavinton, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. If you have leaking joints around cladding and façade panels and rigid filler in a joint that should flex, we can help, on façade panels, joints between brick and frames and brickwork movement joints alike.
Stone walls need a stone-friendly sealant, as acetoxy products can attack some stone. Newer houses need their movement joints and roofline trims kept sound.
All our work comes with our one-year guarantee.
- Where
- Gavinton (TD11)
- Region
- Scottish Borders
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
What we are called out for in Gavinton
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it cannot stretch and rips as the joint opens.
If you can see any of these, it’s time to have the joints looked at:
- Damp patches traced to an open external joint
- Sealant pulling away from one side of the joint
- Weathered mastic that no longer stretches
- Failed seals between different materials
For site and facilities teams at buildings such as Berwickshire High School, larger buildings have long runs of movement joint that eventually need resealing.
Before you book anyone
- What product goes in the joint
- How the joint is cleaned and prepared
- Who does the work, and how experienced they are
- Whether all the old sealant comes out first
What external mastic looks like in Gavinton
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and failed outside joints work against that. Plenty of Scottish homes have harled walls, and joints where harling meets other materials need a sealant that can grip and flex.
For an older house near a landmark such as Gavinton Parish Church and Churchyard, an extension built onto an older house moves differently, and the joint between them takes the strain.
Gavinton is in the Scottish Borders. Gavinton gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Across the Scottish Borders, we cover 89 places, and Gavinton is one of them. There’s also a page for Edinburgh, roughly 35 miles from Gavinton.
We cover every part of TD11 for external mastic and the streets around it. External mastic is available to properties on Main Street, South Street and The Glebe and the roads around them. Neighbouring places we cover for external mastic include Clockmill (1 mile north), Duns (1 mile north-east), Preston (3 miles north-east), Swinton (5 miles south-east) and Greenlaw (5 miles south-west). We also work in nearby towns such as Kelso (11 miles south), Eyemouth (13 miles north-east), Earlston (15 miles south-west), Lauder (15 miles west) and Chirnside (7 miles north-east).
Near you in Gavinton
Well-known places in the area include Jim Clark Motorsport Museum (1.4 miles north-east) and Langton Castle (1.1 miles north-west). Open spaces near Gavinton include Duns Castle nature reserve and Duns Law.
What else we do in Gavinton
How to look after the new joints
To keep the joints looking good and working properly:
- Have failed joints looked at early
- Point out the joints to other trades
- Never let anyone fill a movement joint with mortar
- Walk round the building once a year and look at the joints
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
Act while the splits are small. At that stage it’s a simple cut out and reseal before water has had years to get in.
How the visit works
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours to a few days, depending on the length of joint and the access. 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.
- First we look over the joints with you, agree which to renew and talk through access.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- 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.
Preparing for the visit
- On commercial sites, let us know about site rules
- Tell us about any water getting in
- Move anything stored near the joints
Get a quote
If you’re in Gavinton and need external mastic, send an email to info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
Related advice
What affects the quote in Gavinton
Jobs vary more than people expect. What affects the quote:
- The number of rooms or windows
- Mould in or behind the old joints
- The type of sealant required
- Access and height
What you pay reflects the work, not guesswork. That’s why we ask a few questions first and agree the price before starting.
Helping us quote
Photos by email are helpful but not essential. Please mention:
- Any previous sealing or DIY work
- How we’d reach the joints
- Roughly how big the job is
- The type of property
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that is easy.
Gavinton questions
Is there a guarantee on external mastic in Gavinton?
All our work, in Gavinton and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Is Gavinton within the area you cover?
Yes, we do. Our work covers the whole of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you.
Can you do several jobs on one visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Where are you based?
We work from Crawley. Our applicators cover Gavinton, along with the rest of our area.
What colours does the sealant come in?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. Exterior sealants come in a good range of colours.
How long does external mastic take?
Most jobs take a few hours for a handful of joints, longer for a whole elevation. Your quote will say how long we expect yours to take.
I’m a tenant. Can you help?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Landlords, agents and businesses in Gavinton
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.