Edinburgh · Scotland
Hermiston External Mastic
We cover Hermiston for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Rain getting behind render or cladding at a joint
- Leaking joints around cladding and façade panels
- Weeds or debris growing in open joints
External mastic in Hermiston, done properly
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 does not stand out. If you have panel joints letting water in and plants rooting in failed movement joints, we can help.
Stone walls need a stone-friendly sealant, as acetoxy products can attack some stone. Newer houses need their movement joints and roofline trims kept sound.
Every job comes with our one-year guarantee, wherever you are in Edinburgh.
- Where
- Hermiston (EH12, EH14)
- Region
- Edinburgh
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Honest limits
Sealant is not the answer to every problem, and we will tell you before any work starts. It won’t solve:
- Cracking across the wall rather than at a joint
- 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 send an email to info@mrmastic.co.uk and we will give you a straight answer before you book.
Surfaces we seal
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
- Façade panels
What affects the cost of external mastic
Call for a quick quote. The main things that affect it are:
- Whether the work is at height
- The product the joint needs
- Working hours on commercial sites
- How many rooms, windows or areas are involved
The cost depends on the amount of work, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts.
Asking for a quote
When you call or email, it’s useful to know:
- If someone has resealed it before
- Access, such as stairs, a lift or height
- What’s wrong with the joints now
- How many joints, rooms or windows are involved
To get a quote, drop us a line at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
FAQs for Hermiston
Will you come out to Hermiston?
Yes, Hermiston is covered. Our work covers the whole of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I let a flat near Edinburgh Park station. Can you help?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can go on one quote. You can send an email to info@mrmastic.co.uk with the details for a clear quote.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin from the range available.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
Where do you work from?
Our base is in Crawley, and we work across South East England, London and Scotland.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply send an email to info@mrmastic.co.uk.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that normally means someone at home.
Outside joints around Hermiston
Harled (roughcast) walls are common in Scotland, and joints where harling meets other materials need a sealant that can grip and flex. 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.
In and around Hermiston, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Hermiston is about 5 miles west of Edinburgh, in Edinburgh. Across the EH12 area, we can carry out external mastic at your property. Our Edinburgh coverage runs to 175 places, Hermiston among them.
We cover every part of EH12 and EH14 for external mastic and the streets around it. If you need external mastic at a property on Gogar Station Road, Hermiston House Road and Hermiston Steading or anywhere close by, we can help. Other places close to Hermiston include Riccarton (1 mile south), Gogar (1 mile north-west), Maybury (1 mile north), Warriston (1 mile south-west) and West Craigs (1 mile north). Further out, we also cover Edinburgh (5 miles east), Leith (7 miles north-east), Bonnington (6 miles north-east), Greenside (6 miles north-east), Broughton (6 miles north-east) and Bellevue (6 miles north-east).
What’s near Hermiston
The closest station to Hermiston is Edinburgh Park station, about 0.6 miles north-east of the centre. Well-known places in the area include ICE Scotland Museum (0.8 miles south) and The Gyle Shopping Centre (1.2 miles north). Not far away are The New Leaf Co-op and Warklaw Hill.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Avoid pressure-washing directly into sealant joints
- Deal with leaking gutters that soak the joints below
- Check the sealant is paintable before painting near it
- Look over the joints every year, ideally after winter
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead and let water in behind.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.
What happens if it’s left?
A properly done movement joint is an even line in a colour that suits the wall. A rushed bead with no backing looks untidy and doesn’t last so it’s worth doing right. In a place like Hermiston, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why Hermiston clients choose us
- White, clear, grey or another colour, product permitting
- Rated 4.9 stars on Google
- Anti-fungal sanitary silicone in wet areas
- Full insurance on every job
Take a look at what affects the cost or customer reviews.
Places near Hermiston
Also in Hermiston
The process
Once we’re on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a handful of joints, longer for a whole elevation. Around Hermiston, distance and access matter more than parking. Let us know how to find you and how to reach the joints.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Mention any tricky access
- For business premises, tell us about site rules or sign-in
- Try not to wet indoor joints just before the visit
Getting a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we will take it from there.
Read more
Do you need external mastic in Hermiston?
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it cannot stretch and tears as soon as the joint widens.
Keep an eye out for any of the following:
- Sealant pulling away from one side of the joint
- Old sealant gone brittle and cracked
- Water getting into walls through failed joints
- Moss and dirt in joints with no sealant left
If you let a flat or house near Edinburgh Park station, split movement joints are easy to miss on a rental until damp shows inside.
Before you book anyone
- What the cure time is
- How hidden problems are handled
- How long the guarantee is
- Is VAT in the price?
For landlords and businesses
If you manage several properties in or around Hermiston, several properties can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.