Glasgow · Scotland
Window & door mastic in Netherton, Glasgow
Mastic around window and door frames, sills and patio doors for homes and businesses in Netherton and across Glasgow. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Sealant in the wrong colour for the frame
- Mastic that has split away from the wall
- Draughty joints inside around the window
How we handle window mastic in Netherton
A window frame and the wall around it expand and shrink at different rates. Heat and cold make frames grow and shrink against brick or render that hardly moves. So the sealant has to stretch and recover, which is why we use a low-modulus product. We’re often asked to deal with hard, cracked sealant around windows and cracked internal joints between frame and plaster, on composite doors, timber windows & doors and window sills.
Sash and case windows are a feature of older tenements in all four Scottish cities, though many have since been replaced. In Netherton, as anywhere, the mastic between frame and wall is what stops draughts and rain getting in.
Big or small, you get the same one-year guarantee.
- Place
- Netherton (G13, G61, G12)
- Region
- Glasgow
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- info@mrmastic.co.uk
- Page updated
- 26 October 2026
Why deal with it now?
Choosing the product is half the job. Decorators’ caulk and bathroom silicone aren’t designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. Wind-driven rain gets into any failed joint on the outside of a city building, and in Netherton, damp can spread through stone and plaster before anyone sees it.
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you are not sure whether it needs doing, send an email to info@mrmastic.co.uk and we’ll give you an honest view and a quote.
Why book with us
- 20+ years of sealant experience
- Sanitary silicone with an anti-fungal additive in wet areas
- A choice of colours where the product allows
- We are fully insured
Towns and villages near Netherton
What else we do in Netherton
Netherton homes and the weather
Glasgow’s tenements are largely red and blond sandstone, and sandstone is porous, so any sealant against it has to be one that will not stain or attack it. Under the Repairing Standard, private landlords in Scotland have to keep homes wind and watertight, and failed outside joints work against that.
For an older house near a landmark such as Knightswood St Margaret's Parish Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you look after a building such as Knightswood Secondary School, its window and door frames need their mastic kept sound, just like a home’s.
Netherton is about 2 miles south of Bearsden, in Glasgow. For window mastic in and around Netherton, please email us at info@mrmastic.co.uk for a quick quote. We cover Glasgow from our Crawley base, Netherton included. Our Glasgow coverage runs to 183 places, and Netherton is one of them.
All of G13, G61 and G12 is within our area for window mastic, from the main roads to the quietest streets. Whether your property is on Ilay Road, Saxon Road and Cedric Road or anywhere close by, our applicators can take on the job. With the A82 close by, Netherton is simple for us to get to. We also cover the places around Netherton: Temple (1 mile south), Anniesland Cross (1 mile south), Anniesland (1 mile south), Knightswood (1 mile south-west) and Dawsholm (1 mile east). Larger places within reach include Glasgow (4 miles south-east), Woodlands (3 miles south-east), Woodside (3 miles south-east), Garnethill (3 miles south-east), Anderston (3 miles south-east) and Calton (5 miles south-east).
Local landmarks in Netherton
Locally, jobs take us to homes and businesses close to Lock 27 pub, Jordanhill College and Dawsholm Park. The closest station to Netherton is Westerton station, roughly 0.6 miles north-west. Other landmarks nearby include Partick Castle (2.2 miles south-east) and Glasgow Museum of Transport (2.4 miles south-east). The countryside around Netherton includes Castle Hill and Kilmardinny.
Common questions in Netherton
Can you help a landlord with a rental near Westerton station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. You can drop us a line at info@mrmastic.co.uk with the details for a clear quote.
Do you cover Netherton for window mastic?
Yes, Netherton is within the area we cover. Our work covers the whole of Scotland. You can email us at info@mrmastic.co.uk and tell us what needs doing.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
How long before the joint can be used?
Different products cure at different speeds, so follow the cure time we give you when we finish.
Can I paint over the new sealant?
Most silicone cannot be painted. Let us know beforehand, and we’ll use a paintable product where it suits.
Do you guarantee window mastic?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
Will resealing my frames help with draughts?
Often, yes. Air often gets in between the frame and the wall, and sealing the inside and outside joints closes that path.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected, and the area is left clean when we finish.
Landlords, agents and businesses in Netherton
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
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.
Common problems we fix in Netherton
Mastic ages in the weather. Sunlight dries the surface out, and over the years it loses its give, cracks and comes away.
Common reasons people contact us include:
- Hard, cracked sealant around windows
- Rain getting in at the frame or under the sill
- Cracked internal joints between frame and plaster
- Mastic that is falling out in pieces
For landlords with property near Westerton station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Comparing quotes
- What guarantee comes with the work
- How the colour is chosen
- What the quote includes, VAT included or not
- Whether they seal over old material or remove it
What we do, step by step
When we arrive, we look over the joints with you first, so you know exactly what we are doing. We protect the surfaces around the joints before any work begins. The work generally takes a few hours for a few frames, or a day or more for a whole house. For a tenement in Netherton, work inside your flat is between us and you, while shared parts may need the factor or neighbours to agree. Tell us which applies when you book.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Mention any parking rules near the property
- Let us know if you’ve seen damp or leaks
- Tell us about any previous sealing or DIY attempts
How to get a quote
We do not publish a price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, send an email to info@mrmastic.co.uk.
Read more
What affects the cost of window mastic
We do not publish a price list. What we look at:
- Whether the work is at height
- Whether there’s mould to deal with
- Any working-time requirements on site
- How many areas need sealing
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
What to tell us for a quote
What to tell us when you ask for a quote:
- Any previous sealing or DIY work
- The type of property
- The problem you’ve noticed
- Roughly how big the job is
To get a quote, email us at info@mrmastic.co.uk and tell us where the job is and what the problem looks like. You’ll have a clear quote before work begins.
DIY sealant or a professional job?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
How the job changes by surface
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. The threshold and the bottom corners take the most water, so we pay close attention there.
Window sills
The end joints of a sill tend to fail before the rest. A tight seal at each end keeps rain out of the wall.