Scottish Borders · Scotland
Kelso External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Kelso, with a one-year guarantee on every job. Call for a quick quote.
- Leaking joints around cladding and façade panels
- Joints where the bead has come unstuck
- Cracked joints where brick meets render or frames
How we handle external mastic in Kelso
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. We work on brickwork movement joints, concrete & block and render & cladding joints, and common reasons people get in touch are moss and dirt in joints with no sealant left and failed sealant between panels on a façade.
Older stone buildings need a sealant that suits the stone, not an acetoxy product that can mark or attack it. Newer houses need their movement joints and roofline trims kept sound.
All our work is covered by our 12-month guarantee.
- Place
- Kelso (TD5)
- Region
- Scottish Borders
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Can I do it myself?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Quotes for external mastic in Kelso
The quote reflects the job in front of us. We take into account:
- How many areas need sealing
- The size of the job
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.
Helping us quote
There’s no need for technical detail. Just tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
- Roughly how big the job is
- The type of property
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To arrange one, email us at info@mrmastic.co.uk.
Signs you need external mastic in Kelso
UV, rain and frost all age exterior sealant. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
Look out for these signs:
- Brick movement joints where the sealant has split
- Cracked joints where brick meets render or frames
- Movement joints filled with mortar instead of sealant
- Sealant pulling away from one side of the joint
Schools such as Kelso High School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Comparing quotes
- How the joint is cleaned and prepared
- What the cure time is
- Who does the work, and how experienced they are
- What insurance they hold
Outside joints around Kelso
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and sound outside sealant is part of that. Plenty of Scottish homes have harled walls, and where harling meets frames, pipes and other materials, the joint needs a flexible sealant that grips a rough surface.
In and around Kelso, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Kelso is about 32 miles south-east of Bonnyrigg, in the Scottish Borders. Every kind of property in Kelso is covered for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Kelso is one of 89 places in the Scottish Borders we cover for external mastic. Edinburgh is on our list too, around 38 miles away.
We cover every part of the TD5 postcode area for external mastic and the streets around it. External mastic is available to properties on Horse Market, Station Road and Forestfield. Kelso is on the A698 and A699, so it’s easy for us to get to with everything needed for external mastic. We also cover the places around Kelso: Sprouston (2 miles east), Ednam (2 miles north), Heiton (2 miles south-west), Stichill (3 miles north) and Roxburgh (3 miles south-west). Larger places within reach include Galashiels (15 miles west), Jedburgh (10 miles south-west), Duns (13 miles north), Melrose (11 miles west), Earlston (10 miles west) and Lauder (15 miles north-west). Being one of the Scottish Borders’s larger places, Kelso has homes, rented property and businesses of every kind.
Landmarks near Kelso
Locally, jobs take us to homes and businesses close to The Waggon Inn and the streets around them. Other landmarks nearby include Kelso Hospital (within half a mile north-west) and Roxburgh Castle (1 mile west).
Also in Kelso
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Point out the joints to other trades
- Keep high-pressure jets off the joints
- Fix overflowing gutters above sealed joints
- Don’t let climbing plants root in the sealant
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage which cost more to put right than the joint.
Kelso: your questions answered
What guarantee comes with external mastic in Kelso?
All our work, in Kelso and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Is Kelso within the area you cover?
Yes, Kelso is covered. Our work covers the whole of Scotland, from towns to the smallest places. Longer journeys are simply planned in advance.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
When will the joints need doing again?
It depends on the exposure, the movement and the product. Treat it as a maintenance item and look at it yearly and renew it when it starts to fail.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Do you work for letting agents?
Yes, regularly. Several properties can go on one quote.
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
What happens on the day
On the day, we look over the joints with you first. We protect the surfaces around the joints before any work begins. Most jobs take anything from a few hours to several days, depending on the building. For a place like Kelso, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- 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.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Try not to wet indoor joints just before the visit
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
Want a quote for external mastic? Please send an email to info@mrmastic.co.uk with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner, so it pays to do it properly once. Exposed walls in smaller Scottish places take a lot of wind and rain, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Why Kelso clients choose us
- Quality sealants from Arbo and Everbuild
- A 12-month guarantee on all work
- Any old sealant cut out fully, not covered over
- A choice of colours where the product allows
See our cost guide or what customers say.