Midlothian · Scotland
External Mastic in Auchendinny
Sealing brickwork movement joints, render, cladding and façade joints for Auchendinny, backed by a one-year guarantee. Ask us for a quote.
- Moss and dirt in joints with no sealant left
- Old sealant gone brittle and cracked
- Damp patches traced to an open external joint
Questions from Auchendinny
Is Auchendinny in your area for external mastic?
Yes. Our work covers the whole of Scotland, and Auchendinny is part of that. You can send an email to info@mrmastic.co.uk and let us know what needs doing, and we’ll give you a clear price.
Will you come out to Auchendinny?
Yes, we do. Our work covers the whole of Scotland, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you remove the old sealant?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
Where do you work from?
We work from Crawley. Our applicators cover Auchendinny, along with the rest of our area.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We will tell you what we’re using and why.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and we’ll quote it together.
Do I need to be at home?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
External mastic for homes and businesses in Auchendinny
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall. We work on render & cladding joints, concrete & block and joints between brick and frames, and the jobs we see most are weathered mastic that no longer stretches and sealant that has lost its bond to the brick or render.
Older stone buildings need a sealant that suits the stone, not an acetoxy product that can mark or attack it. On newer homes, the movement joints and roofline trims are what need watching.
Every job is covered by our 12-month guarantee, wherever you are in Midlothian.
- Where
- Auchendinny (EH26)
- Wider area
- Midlothian
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost around the joint, so the damage spreads beyond the joint. In an older home around Auchendinny, damp from a failed joint can get into timber and plaster, which is a far bigger job than the sealant.
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part.
Why us?
- More than 20 years in sealant work
- You choose the colour before work begins
- 12-month guarantee on every job
- Experience in homes, commercial sites and hotels
Read our cost guide and our reviews.
What sealant work cannot fix
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Damp that isn’t coming from the joint
- Cracks in the bricks or render themselves, away from the joints
- Movement that is more than a sealant joint can take
If in doubt, send an email to info@mrmastic.co.uk and we will say what we think.
Surfaces we seal
- Render & cladding joints
- Brickwork movement joints
- Façade panels
- Joints between brick and frames
- Concrete & block
- Copings & trims
What else we do in Auchendinny
Work for landlords, hotels and businesses
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured for the work.
If you manage several properties in or around Auchendinny, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
Signs you need external mastic in Auchendinny
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
Signs it’s time to call us include:
- Movement joints with cracked, split or missing sealant
- Hard, crazed mastic that has stopped moving
- Movement joints filled with mortar instead of sealant
- Leaking joints around cladding and façade panels
Managing a site like Beeslack Community High School? Then larger buildings have long runs of movement joint that eventually need resealing.
Comparing quotes
- Whether all the old sealant comes out first
- Who does the work, and how experienced they are
- What the quote includes, VAT included or not
- How the joint is cleaned and prepared
How to look after the new joints
To keep the joints looking good and working properly:
- Deal with leaking gutters that soak the joints below
- Keep high-pressure jets off the joints
- Point out the joints to other trades
- Walk round the building once a year and look at the joints
Don’t paint over the new sealant unless we have said the product is paintable. Paint can crack on a flexible joint, and paint can crack as the joint moves.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
What happens on the day
The work is kept neat and contained to the area we are working on, so you can carry on as normal. The job generally takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Auchendinny may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
- Clear the area around the work
How to get a quote
Want a quote for external mastic? Please drop us a line at info@mrmastic.co.uk and tell us about the job. We will explain what we’d do and give you a clear price before any work starts.
Related advice
What external mastic looks like in Auchendinny
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. 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.
If you live in an older home near Glencorse Parish Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Auchendinny is about 1 mile north-east of Penicuik, in Midlothian. For external mastic in and around Auchendinny, please drop us a line at info@mrmastic.co.uk for a quick quote. We cover Midlothian from our Crawley base. 33 places in Midlothian are on our list. You can also see our page for Edinburgh, about 7 miles away.
Postcode districts we cover here for external mastic: EH26. Streets in the area include Glencorse Park, Graham's Road and Old Dalmore Terrace, and we cover them all. Neighbouring places we cover for external mastic include Roslin (1 mile north-east), Bilston (2 miles north), Rosewell (2 miles east), Loanhead (3 miles north-east) and Old Pentland (3 miles north). Larger places within reach include Bonnyrigg (4 miles north-east), Dalkeith (6 miles north-east), Gorebridge (6 miles east), Newtongrange (5 miles east), Mayfield (6 miles east) and Shawfair (7 miles north-east).
Around Auchendinny
Nearby you’ll also find Rosslynlee Hospital (2.2 miles west) and Oldwoodhouselee Castle (under half a mile south-east). The countryside around Auchendinny includes Edgelaw Reservoir and Castle Law.
What affects the quote in Auchendinny
Your quote is based on your job. We take into account:
- The size of the job
- Access and height
- The type of sealant required
- Working hours on commercial sites
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and send you a clear quote before any work starts.
Asking for a quote
When you contact us, it’s useful to know:
- Any previous sealing or DIY work
- A few pictures by email, if you can
- The rough size of the job
- Any access issues, like height or stairs
Getting a quote is simple: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job.