Glasgow · Scotland
Yoker External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Yoker and across Glasgow. Fully insured, ARBOMaster approved and guaranteed for a year.
- Leaking joints around cladding and façade panels
- Joints pointed up with cement by mistake
- Weathered mastic that no longer stretches
What happens on the day
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours for a handful of joints, longer for a whole elevation, and the area is left clean. In a Scottish city, a lot of jobs are in tenement flats, up a common stair from a shared close. For a job in Yoker, tell us the floor, how the door entry system works and where we can park nearby.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Let us know about parking restrictions
- Plan for the work area to be out of bounds to pets and children
- Clear items away from the joints we’re working on
Ask for 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.
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How we handle external mastic in Yoker
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint does not stand out. We work on copings & trims, render & cladding joints and joints between brick and frames, and the jobs we see most are rigid filler in a joint that should flex and hard, crazed mastic that has stopped moving.
On a four-storey tenement, gutter joints are a long way from the street, so a leaking joint can run down the stone for months before anyone notices. In Yoker, access needs planning, and work on shared parts may need the other owners’ agreement.
Each job carries a 12-month guarantee, whatever its size.
- Place
- Yoker (G13, G81, G14)
- Region
- Glasgow
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Aftercare tips
A little care helps the new joints last. We recommend:
- Keep high-pressure jets off the joints
- Point out the joints to other trades
- Get split or bare joints resealed while the damage is small
- Keep water from gutters off the wall
Follow the cure time we give you before the joint is knocked or disturbed. The surface skins over quickly, but full cure takes longer.
A joint that has stopped moving pushes the movement elsewhere, usually as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
Why deal with it now?
Water gets in through a failed movement joint, behind render and cladding. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. Wind-driven rain gets into any failed joint on the outside of a city building, and in a tall building in Yoker, damp can travel a long way before it shows.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You’ll know the price before we begin.
Why Yoker clients choose us
- We leave the area clean and tidy
- Full insurance on every job
- Anti-fungal silicone where joints get wet
- A 12-month guarantee on all work
See what affects the cost or our reviews.
What else we do in Yoker
Surface by surface
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod in a colour to suit the brick.
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind and protects the render itself.
What external mastic looks like in Yoker
Much of Glasgow is built from red and blond sandstone, and porous sandstone needs a sealant that will not mark it. With historic houses such as Tenement House (about 4.6 miles east) nearby, there’s older building stock in the area around Yoker as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
For site and facilities teams at buildings such as Saint Andrew's High School, its movement joints, gutters and trims need looking after like any other building’s. In the older streets around Hamilton Memorial Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
Yoker is about 2 miles south-east of Clydebank, in Glasgow. Homes, rented property, offices and hotels in Yoker is covered for external mastic. Every job comes with our 12-month guarantee. Yoker is one of 183 towns and villages in Glasgow where we work.
Here we cover the G13, G81 and G14 postcode area for external mastic. We cover properties on Mill Road, Helm Road and Dyke Road. You’ll find Yoker on the A741, which makes it straightforward to reach. We also cover the places around Yoker: Garscadden (1 mile south-east), Scotstounhill (1 mile south-east), Renfrew (1 mile south), Knightswood (1 mile east) and Scotstoun (2 miles south-east). Further out, we also cover Glasgow (5 miles south-east), Hillhead (4 miles east), Dowanhill (3 miles east), Woodlands (4 miles east), Woodside (4 miles east) and North Kelvinside (4 miles east).
Near you in Yoker
Locally, jobs take us to homes and businesses close to Robertson Park and Wheatsheaf Public House and the streets around them. There’s a railway station in Yoker itself: Yoker station. A little further out are Drumchapel Hospital (1.2 miles north-east) and Renfrew Museum (1 mile south). For a walk, there’s Kilmardinny and Castle Hill.
Questions from Yoker
Do you cover Yoker for external mastic?
Yes, Yoker is within the area we cover. We work across all of Scotland. Just email us at info@mrmastic.co.uk with a few details of the job, and we will give you a clear price.
Who arranges sealant work on the shared parts of a tenement in Yoker?
It usually goes through the owners together, or through the factor if the building has one. The Tenements (Scotland) Act 2004 sets the rules for common parts if the deeds don’t.
Where is Mr Mastic based?
We are a Crawley-based firm. We work across South East England, London and Scotland.
Will the new joint stand out?
The sealant colour is picked to suit the wall, so the joint sits quietly in the wall. There’s a wide choice of exterior colours.
Why do you put foam in the joint first?
The foam is closed-cell backing rod. It stops the sealant going in too deep and bonding to three sides, which would stop it stretching.
Can a movement joint be filled with mortar?
No, not if it’s a movement joint. Pointing it stops it working and can lead to cracking. We will reseal it with a flexible sealant.
Can you do several jobs on one visit?
Yes, and it often makes sense. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
Can you seal joints between two different materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
When it isn’t the sealant
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Cracked brickwork or render that needs a builder or plasterer
- Structural movement, which needs a surveyor or engineer
- Walls that need new movement joints cut into them
If you’re not sure, just send an email to info@mrmastic.co.uk and we’ll give you a straight answer.
Joints and surfaces we work on
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Concrete & block
- Copings & trims
- Façade panels
Signs you need external mastic in Yoker
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
The problems people usually mention when they call include:
- Cracked joints where brick meets render or frames
- Moss and dirt in joints with no sealant left
- Hard, crazed mastic that has stopped moving
- Sealant that has lost its bond to the brick or render
Letting a property close to Yoker station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
What your quote should include
- Whether all the old sealant comes out first
- How much experience the applicator has
- Whether the sealant suits the joint
- The length of the guarantee
How we quote for external mastic
We do not publish a price list, because jobs vary so much. The quote depends on:
- The number of rooms or windows
- The product the joint needs
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re unsure, drop us a line at info@mrmastic.co.uk and we’ll give you an honest view and a quote.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- If someone has resealed it before
- Pictures of the joints, sent by email
- The type of property
- What’s wrong with the joints now
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you are ready, email us at info@mrmastic.co.uk.