South Lanarkshire · Scotland
New Trows External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in New Trows, with a one-year guarantee on every job. Call for a quick quote.
- Panel joints letting water in
- Gaps where render, brick and frames meet
- Old sealant gone brittle and cracked
The process
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, carry out the job and tidy away. It usually takes anything from a few hours to several days, depending on the building. Somewhere like New Trows may be a longer drive, and the journey is planned ahead. Mention tracks, gates, ferries or anything else about the route.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- 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.
- We push in closed-cell backing rod so the sealant is the right depth and bonds to the sides only.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Let us know about parking restrictions
- Tell us about any water getting in
- For business premises, tell us about site rules or sign-in
Ask for a quote
Asking for a quote is easy: tell us what needs doing and where. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Read more
External mastic in New Trows, done properly
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two where mortar or filler would crack. Typical jobs include gaps where render, brick and frames meet and weeds or debris growing in open joints, across render & cladding joints, copings & trims and brickwork movement joints.
In and around a place like New Trows, many buildings face open ground and take the full weather. Gutter joints and wall joints take a battering.
Our work is backed for twelve months, in New Trows and everywhere else we cover.
- Location
- New Trows (ML11)
- Wider area
- South Lanarkshire
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Updated
- 26 October 2026
When something else is needed
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Cracking across the wall rather than at a joint
- Damp that isn’t coming from the joint
- Structural movement, which needs a surveyor or engineer
If you are not sure, just email us at info@mrmastic.co.uk and we’ll give you a straight answer.
Surfaces we seal
- Façade panels
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
What affects the quote in New Trows
You’ll get a clear quote before we start. It takes into account:
- The number of rooms or windows
- Any mould that needs treating
- The amount of work
- Working hours on commercial sites
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
Helping us quote
Photos by email are helpful but not essential. Please mention:
- How we’d reach the joints
- The rough size of the job
- Whether it has been sealed before
- Whether it’s a home or a business
Every job is quoted individually. Simply drop us a line at info@mrmastic.co.uk and describe the job, and pictures are welcome.
New Trows questions
Is New Trows within the area you cover?
Yes, New Trows is covered. We work across all of Scotland, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is external mastic in New Trows guaranteed?
All our work, in New Trows and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages to suit the site.
Where do you work from?
Our base is Crawley. Our area covers South East England, London and Scotland.
Can you match the colour of my brickwork?
The sealant colour is picked to suit the wall so the joint blends in. Exterior sealants come in a good range of colours.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
Are you ARBOMaster approved?
Yes. We’re approved under the ARBOMaster scheme.
Do you use backing rod?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back.
For landlords and businesses
Housing providers, facilities teams and property managers book us too in New Trows and across South Lanarkshire. Several sites can be quoted together.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
Walls and rooflines in New Trows
Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that. Harled (roughcast) walls are common in Scotland, and joints where harling meets other materials need a sealant that can grip and flex.
If you live in an older home near Lesmahagow Old Parish Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
New Trows is about 8 miles south of Carluke, in South Lanarkshire. Jobs in New Trows get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. New Trows is one of 139 places in South Lanarkshire where we work for external mastic. You can also see our page for Glasgow, about 22 miles away.
Work in ML11 works the same way as everywhere else we cover. If you are just outside New Trows, we cover Lesmahagow (1 mile north), Brocketsbrae (1 mile north-east), Devonburn (1 mile east), Dillarburn (2 miles north-east) and Auchenheath (3 miles north). We also work in nearby towns such as East Kilbride (15 miles north-west), Hamilton (12 miles north-west), Blantyre (14 miles north-west), Larkhall (8 miles north), Carluke (8 miles north) and Lanark (6 miles north-east).
Landmarks near New Trows
Other landmarks nearby include Douglas Castle (4.7 miles south-east) and Birkwood Castle (0.5 miles north). The countryside around New Trows includes Black Hill.
Why it’s worth doing now in New Trows
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. Too stiff a sealant can pull at the edges and break them. When the nearest tradesperson is a drive away, it’s tempting to leave a small leak, but water through a failed joint keeps working away until it’s fixed.
Doing several joints on one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. We’ll send you a clear quote for the lot.
Why us?
- We’re fully insured
- Rated 4.9 stars on Google
- Any old sealant cut out fully, not covered over
- Tidy, careful work
Towns and villages near New Trows
What else we do in New Trows
Signs you need external mastic in New Trows
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall and make things worse.
These are the problems we’re asked about most:
- Hard, crazed mastic that has stopped moving
- Sealant that has lost its bond to the brick or render
- Moss and dirt in joints with no sealant left
- Damp patches traced to an open external joint
Managing a site like Lesmahagow High School? Then its movement joints, gutters and trims need looking after like any other building’s.
Questions to ask before booking
- Which colour the sealant will be
- The length of the guarantee
- Whether the sealant suits the joint
- What happens if they find a problem under the old sealant
Keeping the joints in good condition
So the new joints stay in good condition:
- Keep soil, plants and ivy away from the joints
- Deal with leaking gutters that soak the joints below
- Look over the joints every year, ideally after winter
- Leave the joints unpainted unless we have said otherwise
Don’t let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage.