Edinburgh · Scotland
External Mastic in Corstorphine
External mastic in Corstorphine from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Joints where the bead has come unstuck
- Joints with sealant missing in places
- Movement joints filled with mortar instead of sealant
Aftercare tips
After the cure time, these simple habits help:
- Keep movement joints as flexible joints, not mortar
- Walk round the building once a year and look at the joints
- Deal with leaking gutters that soak the joints below
- Show decorators and builders where the movement joints are
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
About our external mastic in Corstorphine
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint doesn’t stand out. Common call-outs are for weathered mastic that no longer stretches and weeds or debris growing in open joints, across concrete & block, façade panels and copings & trims.
Alongside their tenements, Scotland’s cities have modern blocks with render, cladding and movement joints. In Corstorphine, those joints dry out over time and let water in behind the render or cladding.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Corstorphine (EH12, EH4)
- Region
- Edinburgh
- Cover
- One year on every job
- Price
- A clear quote up front
- info@mrmastic.co.uk
- Last updated
- 26 October 2026
What the job involves on each surface
Cladding and façade panels
Cladding and façade panels are usually separated by sealed joints. We reseal them with a sealant suited to the panel material.
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Also near Corstorphine
More services for Corstorphine
External mastic in Corstorphine: local notes
Corstorphine is within about 3 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Edinburgh’s Old and New Towns are a UNESCO World Heritage Site, with sash windows throughout the Georgian New Town. If a home is listed or in a conservation area, it’s worth checking with the council before changing the look of windows or walls.
Schools such as Craigmount High School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. If you let a flat or house near South Gyle station, split movement joints are easy to miss on a rental until damp shows inside. If you live in an older home near Corstorphine Collegiate Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Corstorphine is about 3 miles west of West End, in Edinburgh. If you need external mastic in Corstorphine, please send an email to info@mrmastic.co.uk for a quick quote. We’re based in Crawley and cover Edinburgh, Corstorphine included. 175 places in Edinburgh are on our list, from the larger towns to small villages.
Every address in EH12 and EH4 is covered for external mastic. You will find streets such as Manse Road, Gordon Road and Station Road, and we cover them all. If you’re just outside Corstorphine, we cover Wester Broom (1 mile south-west), Carrick Knowe (1 mile south-east), South Gyle (1 mile south-west), Drumbrae (1 mile north) and Clermiston (1 mile north). Further out, we also cover Edinburgh (3 miles east), Leith (5 miles north-east), Bonnington (5 miles north-east), Greenside (4 miles east), Broughton (4 miles east) and Bellevue (4 miles east).
Around Corstorphine
Locally, jobs take us to homes and businesses close to The Torfin pub and Saughton Park. Corstorphine’s nearest station is South Gyle station, about 0.7 miles south-west of the centre. A little further out are Craigcrook Castle (1.1 miles north-east) and The Gyle Shopping Centre (1.1 miles west). For a walk, there’s The New Leaf Co-op and Corstorphine Hill.
Honest limits
To be straight with you, some problems need a different trade:
- Cracking across the wall rather than at a joint
- Damp that is not coming from the joint
- Loose or hollow render, which needs re-rendering
Not sure which it is? You can email us at info@mrmastic.co.uk and we will tell you honestly before you book.
Joints and surfaces we work on
- Façade panels
- Joints between brick and frames
- Brickwork movement joints
- Render & cladding joints
- Concrete & block
- Copings & trims
What happens if it’s left?
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost near the open joint, so the damage spreads beyond the joint. In a Scottish city tenement, failed sealant affects more than one flat: water can reach the flat below, and gaps in shared walls or fire-stopping affect the whole stair.
What you pay reflects the work, not guesswork. That is why we ask about the job first and agree the price before starting.
Why Corstorphine clients choose us
- Sanitary silicone with an anti-fungal additive in wet areas
- A 12-month guarantee on all work
- 4.9 on Google from 180+ five-star reviews
- Colour agreed with you before we start
How the visit works
We keep the work tidy and contained to the joints we’re treating, so you can get on with your day. The job generally takes anything from a few hours to several days, depending on the building, and we explain the cure time before we leave. Many homes in Scotland’s cities are tenement flats, reached through a shared close and up a common stair. For a job in Corstorphine, tell us the floor, how the door entry system works and where we can park nearby.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- 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.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Mention if the joints have been sealed before
- On commercial sites, let us know about site rules
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, email us at info@mrmastic.co.uk.
Related advice
Landlords, agents and businesses in Corstorphine
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
How we quote for external mastic
For a quick quote, just ask. The main things that affect it are:
- How easy the joints are to reach
- Whether there’s mould to deal with
- The old material and how stubborn it is
- How much there is to do
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Any previous sealing or DIY work
- How we’d reach the joints
- Pictures of the joints, sent by email
- What’s wrong with the joints now
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work and give you a clear price.
Corstorphine questions
Does living near the coast affect external mastic in Corstorphine?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are normally the first to need attention.
How is work on the outside of a tenement in Corstorphine usually arranged?
Most tenements arrange shared repairs through the owners or a property factor. The Tenements (Scotland) Act 2004 covers the common parts where the deeds don’t, and we can quote for the factor or the owners directly.
What sealant do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We’ll tell you what we’re using and why.
Do you come to Corstorphine?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland, and that includes Corstorphine.
Where are you based?
We are a Crawley-based firm. We work across South East England, London and Scotland.
Are you insured?
Yes. Mr Mastic is fully insured.
Do you guarantee your work?
Yes, always. There’s a 12-month guarantee on every job, large or small.
Why is there a gap in my brick wall?
Walls move with heat, cold and moisture, so long walls have planned gaps to take that movement. It’s closed with backing rod and a flexible sealant.