Scottish Borders · Scotland
Greycrook External Mastic
Movement joints in Greycrook need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Movement joints filled with mortar instead of sealant
- Joints where the bead has come unstuck
- Moss and dirt in joints with no sealant left
DIY versus a professional finish
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
External mastic for homes and businesses in Greycrook
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. We work on façade panels, copings & trims and concrete & block, and people most often call us about sealant that has lost its bond to the brick or render and hard, crazed mastic that has stopped moving.
In and around a place like Greycrook, many buildings face open ground and take the full weather. Gutter joints and wall joints take a battering.
We stand behind the work with a 12-month guarantee, so you’re covered after we have gone.
- Where
- Greycrook (TD6)
- Wider area
- Scottish Borders
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- info@mrmastic.co.uk
- Updated
- 26 October 2026
How the job changes by surface
Cladding and façade panels
If the façade has a specified sealant, that is what we use or an approved alternative. Send us any details you have about the façade.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant if the joint can be cleared.
When to call us in Greycrook
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 and speed up the damage.
People generally contact us when they notice something like this:
- Joints with sealant missing in places
- Rain getting behind render or cladding at a joint
- Failed seals between different materials
- Sealant pulling away from one side of the joint
In and around Greycrook, as anywhere, good external mastic starts with a clean, dry, properly prepared joint.
Questions to ask before booking
- What happens if they find a problem under the old sealant
- How the joint is cleaned and prepared
- How long to leave it before use
- What insurance they hold
What sealant work cannot fix
To be straight with you, some problems need a different trade:
- Cracks in the bricks or render themselves, away from the joints
- Cutting new joints into brickwork, which is building work rather than sealant work
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If you are not sure, just email us at info@mrmastic.co.uk and we will give you a straight answer.
Joints and surfaces we work on
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Façade panels
- Render & cladding joints
- Brickwork movement joints
Greycrook buildings and the weather
Private landlords in Scotland must meet the Repairing Standard, which includes keeping a home wind and watertight, and sound outside sealant is part of that. 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.
Homes close to St Boswells Church include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Greycrook is about 7 miles south-east of Galashiels, in the Scottish Borders. Whether you are in the middle of Greycrook or further out, we cover external mastic for every kind of property. We cover 89 towns and villages across the Scottish Borders, large and small. You can also see our page for Edinburgh, about 34 miles away.
We cover every part of the TD6 postcode area for external mastic and the streets around it. Whether your property is on Kirk Road, Weirgate Avenue and Polwarth Avenue or anywhere close by, we can help. You will find Greycrook on the A699, so it’s easy for us to get to with everything needed for external mastic. Neighbouring places we cover for external mastic include St Boswells (1 mile north-west), Maxton (1 mile east), Newtown St Boswells (2 miles north-west), Bowden (3 miles west) and Newstead (3 miles north-west). Larger places within reach include Galashiels (7 miles north-west), Hawick (11 miles south-west), Kelso (8 miles east), Selkirk (8 miles west), Jedburgh (7 miles south-east) and Wilton (11 miles south-west).
Local landmarks in Greycrook
Nearby you’ll also find Castle Holydean (3.8 miles west) and Dingleton Hospital (4 miles north-west). Not far away are Bemersyde Moss and Eildon Hill North.
Your questions about external mastic in Greycrook
Can you do external mastic in Greycrook?
Yes. We work across all of Scotland, and Greycrook is part of that. You can drop us a line at info@mrmastic.co.uk and let us know what needs doing.
Is Greycrook within the area you cover?
Yes, smaller places are covered as well as towns. We work across all of Scotland. Let us know about access, parking and anything unusual about getting there when you book.
Will the new joint stand out?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best so it does not stand out.
Where are you based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
What is a movement joint?
Brickwork, render and cladding all move a little, so long walls have planned gaps to take that movement. It’s closed with backing rod and a flexible sealant.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator.
Which products do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Show decorators and builders where the movement joints are
- Fix overflowing gutters above sealed joints
- Wash walls gently around the sealant
- Look over the joints every year, ideally after winter
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
A joint that has stopped moving pushes the movement elsewhere, normally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
Landlord and commercial work in Greycrook
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
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.
What happens on the day
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and clear up. It normally takes a few hours to a few days, depending on the length of joint and the access. Outside jobs in Greycrook need a dry day, because sealant will not bond to a wet joint, so an outdoor job can move if the forecast changes. Indoor work goes ahead whatever the weather.
- 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.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Clear the area around the work
- For business premises, tell us about site rules or sign-in
- Tell us about any water getting in
Get a quote
Want a quote for external mastic? Please email us at info@mrmastic.co.uk with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.