Scottish Borders · Scotland
External Mastic in Langlee
External mastic for Langlee, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Damp patches traced to an open external joint
- Cracked joints where brick meets render or frames
- Old sealant gone brittle and cracked
What we do, step by step
At the end, we look at the finished work together and tell you how long to leave it. The visit itself normally takes anything from a few hours to several days, depending on the building, depending on how much there is to do. For a place like Langlee, longer drives are planned in advance. Tell us about tracks, gates, a ferry crossing or anything unusual about getting there.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Let us know about parking restrictions
- Keep children and pets away from the work area
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Related advice
About our external mastic in Langlee
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, so it bonds to the two sides only and can stretch. We work on brickwork movement joints, concrete & block and façade panels, and common reasons people get in touch are gaps where render, brick and frames meet and joints where the bead has come unstuck.
Outside joints can only be sealed when they’re dry, so work in Langlee depends on the weather. Let us know about access to every wall and roofline.
All our work is covered by a one-year guarantee.
- Where
- Langlee (TD1, TD6)
- Wider area
- Scottish Borders
- Cover
- 12 months on all our work
- Price
- A clear price before we start
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Langlee buildings and the weather
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that. With historic houses such as Peel House (about 4.8 miles west) nearby, there’s older building stock in the area around Langlee as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
For landlords with property near Tweedbank station, split movement joints are easy to miss on a rental until damp shows inside. Managing a site like Galashiels Academy? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Langlee is about 1 mile east of Galashiels, in the Scottish Borders. We provide external mastic to homes and businesses in Langlee, as part of our work across the Scottish Borders. Our area takes in 89 places across the Scottish Borders, from the larger towns to small villages. You can also see our page for Edinburgh, roughly 28 miles from Langlee.
We cover every part of the TD1 and TD6 postcode area for external mastic. We cover properties on Tweed Road, Brier Lane and Gorse Lane. Langlee sits on or near the A6091. If you are just outside Langlee, we cover Tweedbank (1 mile south-east), Galashiels (1 mile west), Boleside (2 miles south-west), Darnick (2 miles south-east) and Gattonside (2 miles east). Larger places within reach include Hawick (13 miles south), Kelso (14 miles east), Selkirk (5 miles south-west), Jedburgh (13 miles south-east), Wilton (13 miles south) and Innerleithen (11 miles west).
Around Langlee
The nearest railway station is Tweedbank station, about 0.9 miles south-east of the centre. Well-known places in the area include Castle Holydean (3.7 miles south-east) and Borders General Hospital (1.8 miles south-east). Green spaces nearby include Eildon Mid Hill.
When it is not the sealant
We won’t take on work that won’t last, so these are the limits:
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Movement that’s more than a sealant joint can take
- Failed render or damaged cladding panels
Not sure which it is? You can drop us a line at info@mrmastic.co.uk and we will tell you honestly before booking.
Surfaces we seal
- Brickwork movement joints
- Joints between brick and frames
- Façade panels
- Render & cladding joints
- Concrete & block
- Copings & trims
How the job changes by surface
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. The movement joint takes that up, so its sealant has to stay flexible.
Why act early in Langlee
Sealing over the top of old mastic does not hold for long. New sealant doesn’t bond well to old, weathered sealant, so the old joint is cut out fully first. Around Langlee, water from a failed joint in an older stone home can soak into timber and plaster, which is a far bigger job than the sealant.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we will go through it with you.
Why Langlee clients choose us
- Domestic, commercial and hotel work
- 180+ five-star Google reviews
- A 12-month guarantee on all work
- Approved under the ARBOMaster scheme
See our cost guide or our reviews.
Also near Langlee
Also in Langlee
Do you need external mastic in Langlee?
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
People normally contact us when they notice something like this:
- Failed seals between different materials
- Failed sealant between panels on a façade
- Movement joints with cracked, split or missing sealant
- Plants rooting in failed movement joints
Historic houses such as Peel House, about 4.8 miles west, show how far back building around Langlee goes, and older homes nearby need a sealant that suits their walls.
Before booking anyone
- Whether they’re fully insured
- Is the old sealant removed completely?
- What happens if the job turns out different
- The length of the guarantee
Landlord and commercial work in Langlee
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Questions from Langlee
Can you help a landlord with a rental near Tweedbank station?
Yes, rental work is part of what we do. Just drop us a line at info@mrmastic.co.uk and tell us about the property, and we will give you a clear price.
Is Langlee within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers the whole of Scotland. Just mention lanes, gates or anything else about the route when you book.
Can you seal joints between two different materials?
Yes. Different materials move at different rates, so the joint between them must be flexible. The sealant is matched to both sides.
Can you work on commercial sites?
Yes. Larger jobs can be planned room by room or area by area.
How often do external joints need resealing?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Every job carries our 12-month guarantee.
Is there any odour?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
Do you guarantee your work?
Yes. Every job comes with our one-year guarantee.
What’s an expansion joint in brickwork?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.