Edinburgh · Scotland
Boswall External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Boswall and across Edinburgh. Fully insured, ARBOMaster approved and guaranteed for a year.
- Damp patches traced to an open external joint
- Movement joints filled with mortar instead of sealant
- Sealant that has lost its bond to the brick or render
About our external mastic in Boswall
Low-level joints can normally be done from the ground. Where joints are higher up, tell us about the building when you get in touch and we will confirm what’s needed to reach them safely. If you have brick movement joints where the sealant has split and hard, crazed mastic that has stopped moving, we can help, whatever the surface.
Scotland’s cities also have plenty of modern blocks with rendered or clad walls and sealed movement joints. In Boswall, those joints dry out over time and let water in behind the render or cladding.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- Boswall (EH5, EH3, EH4)
- Wider area
- Edinburgh
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
Why act early in Boswall
Done well, a resealed joint is a neat, straight line that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner so it’s worth doing right. In a tenement flat in Boswall, a failed seal is rarely just your problem: water can reach the flat below, and gaps in shared walls or fire-stopping affect the whole stair.
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts.
Why choose Mr Mastic in Boswall
- 180+ five-star Google reviews
- Full insurance on every job
- We leave the area clean and tidy
- Domestic, commercial and hotel work
See what affects the cost and what customers say.
Towns and villages near Boswall
Other services in Boswall
Boswall questions
I let a flat near Edinburgh Waverley station. Can you help?
Yes. We work for landlords and agents as well as homeowners. Just email us at info@mrmastic.co.uk with the address and what needs doing, and we will send you a clear quote.
How is work on the outside of a tenement in Boswall normally arranged?
Shared parts of a tenement, such as the roof and outside walls, are generally repaired with the agreement of the owners, often through a property factor. The Tenements (Scotland) Act 2004 sets out how that works where the title deeds do not. Your title deeds will say who owns the windows.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
How do you reach high-level joints?
That depends on the building and the joints. We work on joints that can be reached safely. Give us some details and we’ll confirm the access.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done.
What is a movement joint?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
Is there any odour?
There can be a smell while the sealant cures. Opening a window helps.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Walls that need new movement joints cut into them
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Failed render or damaged cladding panels
If you’re not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer.
Where we work in Boswall
- Concrete & block
- Façade panels
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
Different surfaces, different methods
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant so neither cracks the other.
Cladding and façade panels
If the façade has a specified sealant, that is what we use or an approved alternative. Tell us what the building has when you get in touch.
Boswall buildings and the weather
Boswall is close to 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. The Old and New Towns of Edinburgh are a UNESCO World Heritage Site, and the Georgian New Town is known for its sash windows. 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.
For an older house near a landmark such as Granton Congregational Church, older walls, gutters and the joints where extensions meet them need a flexible sealant. Schools such as Broughton High School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s. Letting a property close to Edinburgh Waverley station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Boswall is about 1 mile north-west of Bellevue, in Edinburgh. Wherever you are in the EH5 postcode area, we can carry out external mastic at your property. Boswall is one of 175 places in Edinburgh where we work.
Here we cover the EH5, EH3 and EH4 postcode area for external mastic. Streets in the area include Ferry Road, Wardie Road and Granton Road, all of which we cover. Being close to the A903, Boswall is easy for our applicators to reach. Neighbouring places we cover for external mastic include Granton (1 mile west), Goldenacre (1 mile south-east), Inverleith (1 mile south), Trinity (1 mile east) and Pilton (1 mile west). Larger places within reach include Sciennes (3 miles south-east), Merchiston (3 miles south), Newington (3 miles south-east), Queensferry (7 miles west), Burgh Muir (3 miles south-east) and Lochend (3 miles south-east).
Near you in Boswall
Typical jobs here are in homes near Starbank Park, Trinity Academy and Old Chain Pier pub. For rail, the closest station is Edinburgh Waverley station, about 1.9 miles south-east. Well-known places in the area include Newhaven Heritage Museum (1 mile east) and Western General Hospital (1 mile south-west). Open spaces near Boswall include Dunsapie Loch and Corstorphine Hill.
How the visit works
The work is kept neat and contained to the area we’re working on, so you can get on with your day. The job usually takes a few hours to a few days, depending on the length of joint and the access, and we tell you how long to leave it before we go. Inside a flat in Boswall, the job is planned with you; outside, shared parts may need the factor or other owners involved. Tell us which applies when you book.
- First we look over the joints with you, agree which to renew and talk through access.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- 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
- Let us know about earlier repairs to the joints
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
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Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can be quoted together.
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.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it doesn’t work out, we can still put it right.
Keeping the joints in good condition
So the new joints stay in good condition:
- Point out the joints to other trades
- Leave the joints unpainted unless we have said otherwise
- Avoid pressure-washing directly into sealant joints
- Don’t let climbing plants root in the sealant
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
A joint that has stopped moving pushes the movement elsewhere, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.