East Lothian · Scotland
Gladsmuir External Mastic
Problem with your movement joints in Gladsmuir? We cut out the old, prepare the joints and apply the right sealant.
- Damp patches traced to an open external joint
- Rigid filler in a joint that should flex
- Weeds or debris growing in open joints
External mastic in Gladsmuir, done properly
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. We work on concrete & block, render & cladding joints and joints between brick and frames, and common reasons people get in touch are damp patches traced to an open external joint and rigid filler in a joint that should flex.
External sealant needs dry surfaces, so outdoor work around Gladsmuir is planned around the weather. Let us know about access to every wall and roofline.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Gladsmuir (EH33)
- Region
- East Lothian
- Cover
- A year, on every job
- Quotes
- A clear price before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Outside joints around Gladsmuir
Gladsmuir is within about 3 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on movement joints and outside wall joints, especially on the side facing the sea. Historic houses like Gosford House (about 3.3 miles north) are a reminder that the area around Gladsmuir has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
If you live in an older home near Gladsmuir Parish Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Gladsmuir is about 3 miles west of Haddington, in East Lothian. From the centre of Gladsmuir to the outskirts, we cover external mastic for every kind of property, from flats and houses to offices and hotels. We cover 48 towns and villages across East Lothian. There’s also a page for Edinburgh, roughly 13 miles from Gladsmuir.
Jobs for external mastic in EH33 works the same way as everywhere else we cover. Gladsmuir sits on or near the A199, so getting to you is simple. Close by, we work in Macmerry (2 miles west), Longniddry (2 miles north-west), Dovecote (3 miles east), New Winton (3 miles south-west) and Easter Pencaitland (3 miles south). Further out, we also cover Musselburgh (7 miles west), Dunbar (14 miles east), Tranent (4 miles west), North Berwick (9 miles north-east), Prestonpans (5 miles west) and Cockenzie and Port Seton (4 miles west).
Around Gladsmuir
The closest station to Gladsmuir is Longniddry station, roughly 2.1 miles north-west of the centre. Well-known places in the area include John Gray Centre Museum (3.3 miles east) and Seton Palace (2.9 miles west). Not far away are Marl Loch and Skid Hill.
Looking after it afterwards
So the new joints stay in good condition:
- Leave the joints unpainted unless we have said otherwise
- Walk round the building once a year and look at the joints
- Have failed joints looked at early
- Keep high-pressure jets off the joints
Only paint over the joint if we’ve confirmed the sealant can take paint. Many exterior sealants are not designed to be painted and spoil the finish.
Act while the splits are small. At that stage it’s a simple cut out and reseal.
Can I do it myself?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
What a professional job adds is preparation and the right 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.
The process
On the day, we look over the joints with you first, so you know exactly what we’re doing. Surfaces next to the work are protected before work begins. Most jobs take anything from a few hours to several days, depending on the building. For a place like Gladsmuir, 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.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Keep pets and children clear of the area while we work
- Where the joints are inside, avoid wetting them before we arrive
- Let us know if you’ve seen damp or leaks
Getting a quote
Getting a quote is simple: let us know what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we’ll take it from there.
Advice
Places near Gladsmuir
What else we do in Gladsmuir
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Whether there’s mould to deal with
- How many areas need sealing
- How much there is to do
- How easy the joints are to reach
We don’t show prices on the website, because each job is priced on what it involves. For a quick quote, please drop us a line at info@mrmastic.co.uk and we will talk you through it.
Asking for a quote
When you call or email, it’s useful to know:
- Any access issues, like height or stairs
- The rough size of the job
- Where the property is
- If someone has resealed it before
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. When it suits you, drop us a line at info@mrmastic.co.uk.
Common questions in Gladsmuir
Can you help a landlord with a rental near Longniddry station?
Yes, rental work is part of what we do. Just email us at info@mrmastic.co.uk and tell us about the property, and we will send you a clear quote.
Is external mastic in a coastal place like Gladsmuir any different?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Do you use backing rod?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Do you have insurance?
Yes. We are fully insured for domestic and commercial work.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides.
How long does external mastic take?
A typical job takes a few hours to a few days, depending on the length of joint and the access, including preparation and clearing up. Your quote will say how long we expect yours to take.
How much does external mastic cost in Gladsmuir?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we will talk you through it.
Is there any odour?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Signs you need external mastic in Gladsmuir
If plants are growing out of a joint, the sealant has normally failed or was never there. Roots and dirt hold water against the wall.
Look out for these signs:
- Sealant pulling away from one side of the joint
- Joints with sealant missing in places
- Gaps where render, brick and frames meet
- Rigid filler in a joint that should flex
Rented homes near Longniddry station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Questions to ask before you book
- The length of the guarantee
- How long to leave it before use
- What preparation is included
- Who turns up on the day
What the job involves on each surface
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
Render joints
Render has movement joints and stop beads that need sealing. They’re resealed in a sealant that suits the render.
What happens if it’s left?
A failed movement joint lets water into the wall. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. In a place like Gladsmuir, small leaks are easy to put off, but water through a failed joint keeps working away until it’s fixed.
Doing several joints on one visit is normally more efficient than separate visits. You will get one clear quote for the whole job.
Why choose Mr Mastic in Gladsmuir
- We never seal over old sealant
- Homes, businesses and hotels
- Quality sealants from Arbo and Everbuild
- Approved under the ARBOMaster scheme
Take a look at our cost guide or our reviews.