Midlothian · Scotland
Gowkshill External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Gowkshill, backed by a 12-month guarantee. Call for a quick quote.
- Rigid filler in a joint that should flex
- Hard, crazed mastic that has stopped moving
- Plants rooting in failed movement joints
What sealant work can’t fix
In fairness, there are a few things sealant will not fix:
- Subsidence or other structural problems
- Cracks in the bricks or render themselves, away from the joints
- Cutting new joints into brickwork, which is building work rather than sealant work
If in doubt, send an email to info@mrmastic.co.uk and we will say what we think.
Where we work in Gowkshill
- Concrete & block
- Joints between brick and frames
- Copings & trims
- Brickwork movement joints
- Façade panels
- Render & cladding joints
External mastic in Gowkshill
For buildings in Gowkshill, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. We work on joints between brick and frames, concrete & block and copings & trims, and the jobs we see most are movement joints with cracked, split or missing sealant and joints where the bead has come unstuck.
Outside joints can only be sealed when they’re dry, so work in Gowkshill depends on the weather, and longer journeys are planned in advance. Tell us how to reach each wall, gutter and roofline.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Gowkshill (EH23)
- Wider area
- Midlothian
- Cover
- 12 months on all our work
- Price
- A clear price before we start
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Looking after it afterwards
Looking after new joints is easy:
- Point out the joints to other trades
- Have failed joints looked at early
- Walk round the building once a year and look at the joints
- Leave the joints unpainted unless we’ve said otherwise
Don’t let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Hotels need rooms back in use, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
Gowkshill questions
Will you come out to Gowkshill?
Yes, smaller places are covered as well as towns. Our work covers the whole of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Can you do external mastic in Gowkshill?
Yes. Our work covers the whole of Scotland, and Gowkshill is part of that. Just send an email to info@mrmastic.co.uk with a few details of the job, and we will give you a clear price.
How often do external joints need resealing?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. A yearly look will tell you when they need doing. Every job carries our one-year guarantee.
Why is there a gap in my brick wall?
It’s a deliberate gap that lets the wall expand and contract without cracking. It should be filled with flexible sealant, never mortar.
Can you work on commercial sites?
Yes. We can plan bigger jobs in stages to suit the site.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the wall cracks somewhere else instead. It needs a flexible sealant over backing rod.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint before we leave.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
What we are called out for in Gowkshill
Weeds, moss and debris in a joint are a sign the sealant has gone. Dirt and roots then trap moisture in the joint and speed up the damage.
Common reasons people contact us include:
- Rain getting behind render or cladding at a joint
- Gaps where render, brick and frames meet
- Movement joints filled with mortar instead of sealant
- Weeds or debris growing in open joints
If you look after a building such as Newbattle Community High School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Comparing quotes
- When the joint can take water or movement
- Who turns up on the day
- Which colour the sealant will be
- What happens if they find a problem under the old sealant
How the visit works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes anything from a few hours to several days, depending on the building, including the tidy-up. In smaller Scottish places, parking is normally less of an issue than access and distance. Tell us how to find the property and how to reach the work, and the visit is planned around that.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any water getting in
- Tell us about access, such as stairs, a lift or high-level joints
How to 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. Whenever you’re ready, send an email to info@mrmastic.co.uk.
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Leave it or put it right?
Sealing over the top of old mastic doesn’t hold for long. The new layer can’t bond properly to old, weathered material, so the old joint is cut out fully first. Out of town in Scotland, exposed walls take a lot of weather, and damp in stone or harled walls takes a long time to dry once water gets behind a joint.
Combining jobs into one visit is usually more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why us?
- Arbo and Everbuild products
- 12-month guarantee on every job
- 180+ five-star Google reviews
- We never seal over old sealant
Take a look at how sealant jobs are priced and what customers say.
Nearby places to Gowkshill
What else we do in Gowkshill
Outside joints around Gowkshill
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. With historic houses such as Melville Castle (about 3 miles north-west) nearby, there’s older building stock in the area around Gowkshill as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
For an older house near a landmark such as Newtongrange Parish Church, the joints between older walls, newer extensions and the roofline need a sealant that can move. Rented homes near Newtongrange station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Gowkshill is about 2 miles south-east of Bonnyrigg, in Midlothian. For external mastic in and around Gowkshill, it’s easy to get a quote: please send an email to info@mrmastic.co.uk. We’re based in Crawley and cover Midlothian. Our area takes in 33 places across Midlothian, large and small. You can also see our page for Edinburgh, about 8 miles away.
Postcode districts we cover here for external mastic: EH23. Streets in the area include The Crescent and Stobhill Road, and we cover them all. We also cover Newtongrange (1 mile north), Gorebridge (1 mile south), Mayfield (1 mile north-east), Birkenside (2 miles south) and Easthouses (2 miles north). We also work in nearby towns such as Penicuik (7 miles west), Loanhead (4 miles west), Shawfair (5 miles north), Danderhall (4 miles north-west), Rosewell (3 miles west) and Roslin (4 miles west).
Landmarks near Gowkshill
We work in homes and buildings around The Dean Tavern and the streets around them. Gowkshill’s nearest station is Newtongrange station, roughly 0.7 miles north-west. Other landmarks nearby include Midlothian Community Hospital (2 miles north-west) and Dalhousie Castle (1.1 miles west). Not far away are Edgelaw Reservoir.