Southampton · England
Sand mastic for sash & case windows in Highfield, Southampton
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Highfield and across Southampton. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Gaps round a timber door in stone or brick
- Tired mastic found when preparing windows for paint
- Old cement repairs round a window that have failed
Landlords, agents and businesses in Highfield
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
About our sand mastic in Highfield
If your home is listed or in a conservation area, check with your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. If you have mastic worn away on windows facing the weather and tired mastic found when preparing windows for paint, we can help, whatever the surface.
Houses in smaller places like Highfield can stand more in the open than those in a built-up town, so exposed windows and doors face the weather head on. That is hard on the mastic around frames and sills.
Every job comes with a 12-month guarantee, wherever you are in Southampton.
- Place
- Highfield (SO17, SO16, SO14)
- Region
- Southampton
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
At the end, we look at the finished work together. The visit itself generally takes a few hours for a single window, longer for several, depending on how much there is to do. Parking around Highfield is normally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Getting ready for the visit
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
There’s no standard price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.
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DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Frames and glazing around Highfield
Highfield is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around older windows and doors, especially on the side facing the sea. With historic houses such as South Stoneham House (about 1.1 miles north-east) nearby, there’s older building stock in the area around Highfield as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For an older house near a landmark such as Highfield Church, the joint between an old wall and a newer frame is normally the first place rain gets in. Letting a property close to St Denys station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Highfield is about 1 mile north of Southampton, in Southampton. Whether you’re in the middle of Highfield or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 40 places across Southampton, from the larger towns to small villages.
Postcode districts we cover here for sand mastic: SO17, SO16 and SO14. You’ll find streets such as Winn Road, Nile Road and The Avenue. Being close to the A3035, Highfield is simple for us to get to. Neighbouring places we cover for sand mastic include Bassett (1 mile north-west), Shirley (2 miles west), Lordswood (2 miles north-west), Freemantle (2 miles south-west) and Coxford (2 miles west). Within a short drive, we also cover Thornhill (3 miles south-east), Harefield (3 miles east), Sholing (3 miles south-east), Woolston (3 miles south), Eling (4 miles west) and Rownhams (3 miles north-west).
What’s near Highfield
Locally, jobs take us to homes and businesses close to Saint George Catholic Voluntary Aided College Southampton, Richard Taunton Sixth Form College and The Cowherds Inn, among other places. The nearest railway station is St Denys station, roughly 0.8 miles south-east of the centre. A little further out are Royal South Hants Hospital (1.2 miles south) and Marlands Shopping Centre (1.7 miles south). Not far away are Netley Common.
Highfield: your questions answered
Do you cover smaller places like Highfield?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Does living near the coast affect sand mastic in Highfield?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
How do I get a quote for sand mastic in Highfield?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
When will the new mastic be hard?
It forms a skin fairly soon and it hardens fully over a longer time. Timing depends on the weather and the joint.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we’re using.
Where do you work from?
We work from Crawley. Our applicators cover Highfield.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new sealant bonds properly.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
When to call us in Highfield
Timber swells and shrinks with the weather. That movement opens up the mastic joint over time.
It’s worth asking for a quote if you see:
- Gaps where the frame meets the masonry
- Mastic dropping out of the joint
- Weathered mastic on the most exposed windows
- Mastic that needs renewing before redecorating
Schools such as Highfield Church of England Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before booking
- Whether you can choose the colour
- Who does the work, and how experienced they are
- Whether VAT is included
- What product goes in the joint
When something else is needed
We will not take on work that will not last, so here’s what sealant cannot put right:
- Planning or listed building consent (your local planning authority decides)
- Rotten sashes, sills or window boxes (a joiner’s job)
- Sashes that rattle, stick or won’t open
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Timber door frames
- Brick reveals
- Tenement windows
- Period & listed homes
- Stone surrounds
- Sash and case windows
Places near Highfield
Other services in Highfield
Quotes for sand mastic in Highfield
The quote reflects the job in front of us. We look at:
- Working hours on commercial sites
- Mould in or behind the old joints
- The size of the job
- How many rooms, windows or areas are involved
Combining jobs into one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We’ll give you a clear quote for the lot.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- Photos by email, if that is easy
- Any access issues, like height or stairs
- The problem you’ve noticed
- The address or postcode of the job
For a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before work begins.
What the job involves on each surface
Stone surrounds
Stone surrounds suit sand mastic well. It finishes to look like part of the surround.
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. We renew it the same way as on windows.