Glasgow · Scotland

External Mastic in Glasgow

External mastic across Glasgow and nearby, with old sealant always removed completely and a 12-month guarantee.

  • Weeds or debris growing in open joints
  • Failed seals between different materials
  • Brick movement joints where the sealant has split

External mastic in Glasgow

External mastic in Glasgow, done properly

For buildings in Glasgow, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. We work on brickwork movement joints, concrete & block and joints between brick and frames, and the jobs we see most are gaps where render, brick and frames meet and weeds or debris growing in open joints.

In a Scottish city tenement, the roof, gutters and outside walls are shared by all the flats. In Glasgow, work on shared parts of a tenement is normally agreed between owners, often with a factor arranging it.

All of our work is guaranteed for twelve months.

Applicator reaching up to seal an external door frame on a sunny day
Where
Glasgow (G33, G32, G53, G46)
Region
Glasgow
Guarantee
One year on every job
Price
Quoted before any work starts
Email
info@mrmastic.co.uk
Page updated
26 October 2026

What happens if it’s left?

It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. Wind-driven rain gets into any failed joint on the outside of a city building, and in a tall building in Glasgow, damp can travel a long way before it shows.

Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.

Why us?

  • Every job guaranteed for a year
  • We’re fully insured
  • More than 20 years in sealant work
  • A sealant colour to suit the surroundings

See what affects the cost or customer reviews.

Glasgow 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. With historic houses such as Tenement House (about 1 mile north) nearby, there’s older building stock in the area around Glasgow as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.

For landlords with property near Anderston station, split movement joints are easy to miss on a rental until damp shows inside. Tenement House, about 1 mile north, is one of the historic houses in the wider area around Glasgow.

Glasgow is in Scotland. Jobs in Glasgow get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. 183 places in Glasgow are on our list, large and small.

Jobs for external mastic in G33, G32, G53 and G46 works the same way as everywhere else we cover. You will find streets such as Plantation Square, Minerva Square and George Square. Main roads around Glasgow include the A8 and A74, which makes travel easy. Neighbouring places we cover for external mastic include Plantation (1 mile west), Tradeston (1 mile east), Kinning Park (1 mile south-west), Sandyford (1 mile north) and Blythswood Hill (1 mile north-east). Within a short drive, we also cover Yoker (5 miles north-west), Hillpark (3 miles south), Temple (3 miles north-west), Merrylee (3 miles south), Muirend (3 miles south) and Newlands (3 miles south).

What’s near Glasgow

Locally, jobs take us to homes and businesses close to Kelvingrove Park, St Vincent Street Church and Old Toll Bar and the streets around them. Nearby too are Stirling's Library (1 mile east), Craigholme School (1.2 miles south-west) and Glasgow Academy (0.7 miles north). Glasgow has its own railway station: Anderston station. A little further out are NHS Louisa Jordan (0.7 miles north-west) and Princes Square (0.8 miles east). Not far away are Hogganfield Loch and Cathkin Braes.

Map of Glasgow © OpenStreetMap contributors

Landlord and commercial work in Glasgow

Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.

We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.

Quotes for external mastic in Glasgow

The quote reflects the job in front of us. We take into account:

  • How much old sealant there is and how hard it is to remove
  • How many rooms, windows or areas are involved
  • Working hours on commercial sites
  • Any mould that needs treating

There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please email us at info@mrmastic.co.uk and we will talk you through it.

Asking for a quote

You don’t need to know the technical terms. Just tell us:

  • What the problem is, such as mould, gaps, leaks or cracking
  • The type of property
  • Photos by email, if that’s easy
  • Where the job is, and your postcode

If you’re in Glasgow and need external mastic, drop us a line at info@mrmastic.co.uk. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.

Different surfaces, different methods

Brickwork movement joints

Vertical joints in long brick walls let the brickwork expand without cracking. They’re resealed over backing rod with a low-modulus sealant in a colour to suit the brick.

Render joints

Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.

What we’re called out for in Glasgow

Buildings move more than people expect. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.

Keep an eye out for these signs:

  • Cracked joints where brick meets render or frames
  • Damp patches traced to an open external joint
  • Weathered mastic that no longer stretches
  • Joints with sealant missing in places

For site and facilities teams at buildings such as Our Lady and St Margaret's Primary School, larger buildings have long runs of movement joint that eventually need resealing.

What to look for in a quote

  • Which colour the sealant will be
  • Whether all the old sealant comes out first
  • How much experience the applicator has
  • How long the guarantee is

10 questions to ask before booking

Looking after it afterwards

After the cure time, these simple habits help:

  • Check external joints each spring
  • Point out the joints to other trades
  • Keep high-pressure jets off the joints
  • Leave the joints unpainted unless we have said otherwise

If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.

Leave a failed movement joint and water keeps getting into the wall. That can lead to damp patches, staining and frost damage, all bigger jobs than a reseal.

Glasgow questions

Do you cover Glasgow for external mastic?

Yes. We work across all of Scotland, and Glasgow is part of that. You can send an email to info@mrmastic.co.uk and tell us what needs doing.

Who arranges sealant work on the shared parts of a tenement in Glasgow?

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, and we can quote for the factor or the owners directly.

Is it OK to fill a movement joint with cement?

No. Cement or mortar can’t stretch. Where a joint has been mortared, it can often be raked out and sealed properly.

Do you use backing rod?

Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.

How do I get a quote for external mastic in Glasgow?

The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.

Do you take out the old sealant first?

Yes, every time. New sealant will not bond properly to old, so the joint is cleaned back first.

Can you do several jobs on one visit?

Of course. Combining jobs makes good use of the visit.

Is there a guarantee?

Yes: twelve months. If there’s a problem with our work in that time, tell us and we’ll put it right.

How the visit works

Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours to a few days, depending on the length of joint and the access. In a city area like Glasgow, parking may be by permit or pay-and-display, so tell us what’s nearby. If you are in a flat, let us know how we get in at the street door.

  1. We look at every joint and agree a colour to suit the wall.
  2. We take out the old sealant until the faces are sound.
  3. Backing rod goes in so the sealant can stretch between the two faces.
  4. Primer is applied wherever the sealant needs it.
  5. We gun in low-modulus sealant and tool it neatly.

How to prepare

  • For indoor joints, keep the area dry beforehand if you can
  • Plan for the work area to be out of bounds to pets and children
  • For business premises, tell us about site rules or sign-in

How to get a quote

Asking for a quote is easy: let us know the job and the location and its rough size. A few photos by email make the job easier to understand, and we’ll take it from there.

Get a price

Advice

20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job