Scottish Borders · Scotland
External & façade joints in Blyth Bridge, Scottish Borders
Professional external mastic in and around Blyth Bridge, with every bit of old sealant taken out first.
- Water getting into walls through failed joints
- Joints with sealant missing in places
- Rigid filler in a joint that should flex
What external mastic looks like in Blyth Bridge
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 failed outside joints work against that.
Around Blyth Bridge, as everywhere, external mastic is only as good as the preparation behind it. Homes close to Kirkurd Parish Church And Churchyard include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Blyth Bridge is about 11 miles south-west of Penicuik, in the Scottish Borders. If you need external mastic in Blyth Bridge, please email us at info@mrmastic.co.uk for a quick quote. We cover the Scottish Borders from our Crawley base, Blyth Bridge included. Blyth Bridge is one of 89 places in the Scottish Borders where we work. Our Edinburgh page covers work nearby (19 miles or so).
Every address in EH46 is covered for external mastic, from the main roads to the quietest streets. Local streets include Tarth Crescent and Mill Lade, all of which we cover. Other places close to Blyth Bridge include Kirkurd (1 mile south-west), Dolphinton (2 miles north-west), Romannobridge (3 miles north-east), West Linton (4 miles north) and Candy Mill (4 miles south-west).
Near you in Blyth Bridge
A little further out are Castle Craig Hospital (0.8 miles south) and Drochil Castle (2.2 miles south-east). Green spaces nearby include Whiteside Hill and Slipperfield Loch.
How we handle external mastic in Blyth Bridge
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible sealant bridges the two where a rigid filler would soon crack. We are often asked to deal with rigid filler in a joint that should flex and hard, crazed mastic that has stopped moving, across joints between brick and frames, brickwork movement joints and concrete & block.
Stone walls need a stone-friendly sealant, as acetoxy products can attack some stone. On newer homes, the movement joints and roofline trims are what need watching.
We stand behind the work with a 12-month guarantee, so you are covered after we have gone.
- Location
- Blyth Bridge (EH46)
- Region
- Scottish Borders
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
Should I try it myself first?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
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.
What sealant work cannot fix
In fairness, some problems need a different trade:
- Movement that is more than a sealant joint can take
- Loose or hollow render, which needs re-rendering
- Cutting new joints into brickwork, which is building work rather than sealant work
If you’re not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Brickwork movement joints
- Render & cladding joints
- Concrete & block
- Copings & trims
- Joints between brick and frames
- Façade panels
The process
Once we are on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes a few hours to a few days, depending on the length of joint and the access. Outside jobs in Blyth Bridge 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.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
Ask for a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we will come back to you with a quote.
Advice
Why it’s worth doing now in Blyth Bridge
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water through a failed joint keeps working away until it’s fixed.
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. We will give you a clear quote for the lot.
Why book with us
- Fully insured
- We leave the area clean and tidy
- 20+ years of sealant experience
- White, clear, grey or another colour, product permitting
How the job changes by surface
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so its sealant has to stay flexible.
Questions from Blyth Bridge
Do you cover Blyth Bridge for external mastic?
Yes, Blyth Bridge is within the area we cover. Our work covers the whole of Scotland. You can email us at info@mrmastic.co.uk and let us know what needs doing.
Is there a guarantee on external mastic in Blyth Bridge?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint.
Do you do commercial work?
Yes, regularly. Larger jobs can be planned room by room or area by area.
Can you seal joints between render and window frames?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.
How long should I leave it?
Different products cure at different speeds, so please follow the time we give you.
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Whether the work is at height
- The old material and how stubborn it is
- The type of sealant required
- The size of the job
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts.
Helping us quote
Before you ask for a quote, have a think about:
- What the problem is, such as mould, gaps, leaks or cracking
- Pictures of the joints, sent by email
- The rough size of the job
- Any access issues, like height or stairs
For external mastic in Blyth Bridge, send an email to info@mrmastic.co.uk. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Towns and villages near Blyth Bridge
What else we do in Blyth Bridge
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
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.