Greater London · England
Sand Mastic in Southall
Sand mastic in Southall from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Open joints round the window box
- Mastic worn away on windows facing the weather
- Tired mastic found when preparing windows for paint
FAQs for Southall
Can parking be tricky for a visit in Southall?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Is Southall in your area for sand mastic?
Yes, Southall is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear quote.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Can you seal over the old sealant?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply ring 0345 464 0079 or send us an email.
How do I get a quote for sand mastic in Southall?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before work begins.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before resealing.
Sand mastic in Southall
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. We work on timber door frames, brick reveals and sash and case windows, and people most often call us about old cement repairs round a window that have failed and draughts and rain around sash boxes.
London has a lot of flats and conversions, where windows are often on upper floors. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Southall is something to talk through when you book.
All our work is covered by our 12-month guarantee, wherever you are in Greater London.
- Where
- Southall (UB2, UB1, UB6, W7)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Frames and glazing around Southall
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Osterley House (about 1.7 miles south-east) are a reminder that the area around Southall has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you look after a building such as Hambrough Primary School, the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Southall station? Then any sash windows need sound mastic to keep draughts and rain out.
Southall is about 3 miles west of Ealing, in Greater London. Homes, rented property, offices and hotels in Southall is covered for sand mastic. The work is guaranteed for a year. Southall is one of 764 towns and villages in Greater London we cover for sand mastic. You can also see our page for London, roughly 12 miles from Southall.
Work in UB2, UB1, UB6 and W7 works the same way as everywhere else we cover. You will find streets such as Uxbridge Road High Street, Emerald Square and Randolph Road, all of which we cover. We also cover Dormers Wells (1 mile north-east), West Ealing (2 miles east), Yeading (2 miles north), Yiewsley (2 miles north) and Hanwell (2 miles east). Larger places within reach include London (12 miles east), City of Westminster (10 miles east), Marylebone (10 miles east), Kensington (8 miles east), St Pancras (11 miles east) and Shoreditch (13 miles east).
What’s near Southall
Around Southall, our work takes us to homes and buildings near Minet Country Park, Glassy Junction pub and Villiers High School, among other places. There’s a railway station in Southall itself: Southall station. Other landmarks nearby include Treaty Centre (2.8 miles south) and Museum of Army Music (3.8 miles south). The countryside around Southall includes Northala Fields and Middle Lake.
When it isn’t the sealant
A few problems are outside what sealant work can do:
- Decisions on consent for listed homes
- Sashes that rattle, stick or will not open
- Cracked or broken glass
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Tenement windows
- Sash and case windows
- Stone surrounds
- Brick reveals
- Timber door frames
- Period & listed homes
When to call us in Southall
Some old mastic was never deep enough. A thin layer doesn’t hold well so we make sure the new mastic is the right thickness.
Any of these means the joints need attention:
- Gaps between timber frames and stone or brick
- A silicone bead on a sash window that spoils the look
- Window mastic to renew ahead of painting
- Weathered mastic on the most exposed windows
For an older house near a landmark such as Saint John, the joint between an old wall and a newer frame is normally the first place rain gets in.
What your quote should include
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
- Which colour the sealant will be
- Who turns up on the day
Different surfaces, different methods
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
Period and listed homes
Period homes look their best with traditional materials, and sand mastic is one of them.
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Landlords, agents and businesses in Southall
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Housing providers, facilities teams and property managers book us too in Southall and across Greater London. Several sites can go on one quote, and we are fully insured for the work.
Places near Southall
What else we do in Southall
How it works
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a single window, longer for several. In a London area like Southall, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Clear items away from the joints we’re working on
- Keep children and pets away from the work area
How to get a quote
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before work begins.
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Leave it or put it right?
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall, so dealing with it now protects both. In a flat in Southall, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
What you pay reflects the work, not guesswork. That’s why we ask about the job first and agree the price before starting.
What you get with us
- Anti-fungal silicone where joints get wet
- ARBOMaster approved applicator
- We are fully insured
- Quality sealants from Arbo and Everbuild
Take a look at what affects the cost or our reviews.