Southampton · England
Sand mastic for sash & case windows in Redbridge, Southampton
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Redbridge, backed by a one-year guarantee. Call for a quick quote.
- Cement or filler used on old window joints that has cracked
- Crumbling sand mastic round a window
- Modern sealant on a period surround
Sand mastic for homes and businesses in Redbridge
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditional guidance is not to paint over it and we will advise if you are redecorating. If you have old cement repairs round a window that have failed and modern sealant on a period surround, we can help.
Outdoor sealant needs dry, clean surfaces, so work on frames around Redbridge is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Redbridge (SO40, SO16, SO15)
- Wider area
- Southampton
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the job takes anything from a few hours to a full day, depending on how many windows for a typical job. Somewhere like Redbridge needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
How to prepare
- Mention any leaks or damp you’ve noticed
- Tell us if parking is tricky
- Let us know about stairs, lifts or work at height
Ask for a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Related advice
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
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.
Common questions in Redbridge
Does the coastal weather in Redbridge affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Do you work for landlords with property near Redbridge station?
Yes. We work for landlords and letting agents as well as homeowners. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Is sand mastic better than silicone for my windows?
That depends on your windows. On many period windows, sand mastic looks right and suits the building, while modern frames normally get a flexible sealant.
When will the new mastic be hard?
A skin forms quite soon, but full hardening takes longer. We’ll tell you what to expect for your job.
Can I choose the sealant colour?
In most cases you can choose. We will tell you which colours the right product comes in.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.
What should I tell you?
A short description and the location. We will ask anything else we need to know.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
What happens if it’s left?
Replacing sash windows is a big decision for a period home, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. Where a wall is exposed, as many are in small places like Redbridge, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Why Redbridge customers choose us
- 12-month guarantee on every job
- Experience in homes, commercial sites and hotels
- 180+ five-star Google reviews
- Old sealant always removed completely
How we quote for sand mastic
Your quote is based on your job. We take into account:
- Which sealant suits the joint
- The amount of work
- Working hours on commercial sites
- Access and height
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or send us an email.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- The address or postcode of the job
- How we’d reach the joints
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved and send you a clear quote.
What the job involves on each surface
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
Sash and case windows
Most of our sand mastic work is on sash windows. Each joint round the box is raked out and renewed.
When it isn’t the sealant
New sealant can’t fix everything, and we’d rather say so up front. It won’t solve:
- Sash cords, weights and draught-proofing of the sashes
- Planning or listed building consent (your local planning authority decides)
- Damaged stone surrounds
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- Timber door frames
- Brick reveals
- Sash and case windows
- Stone surrounds
- Tenement windows
- Period & listed homes
Frames and glazing around Redbridge
Redbridge is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Historic houses like Southampton Tudor House and Garden (about 3.3 miles south-east) are a reminder that the area around Redbridge 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.
For landlords with property near Redbridge station, older sash windows in a rental need their mastic kept sound to keep the weather out. If you look after a building such as Redbridge Primary School, larger buildings have plenty of frames, and the mastic around each one ages. If you live in an older home near All Saints, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Redbridge is about 1 mile east of Totton, in Southampton. Jobs in Redbridge get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. 40 places in Southampton are on our list, large and small.
Work in SO40, SO16 and SO15 is quoted and booked the same way as anywhere else. We cover properties on Mill Road, Test Lane and Tate Road. Redbridge sits on or near the M271, so getting to you is simple. We also cover the places around Redbridge: Eling (1 mile south-west), Millbrook (1 mile east), Hillyfields (1 mile north), Maybush (1 mile north-east) and Regents Park (1 mile east). Larger places within reach include Southampton (3 miles east), Townhill Park (5 miles east), Midanbury (5 miles east), Thornhill (6 miles east), Chartwell Green (5 miles east) and Harefield (6 miles east).
Local landmarks in Redbridge
Locally, jobs take us to homes and businesses close to St James' Park, Ship Inn and Redbridge Community School and the streets around them. There’s a railway station in Redbridge itself: Redbridge station. Nearby you’ll also find Marlands Shopping Centre (3.1 miles east) and Eling Experience (0.6 miles west). The countryside around Redbridge includes Testwood Lakes.
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Clear gutters so water doesn’t pour onto the windows
- Check with your local planning authority if your home is listed
- Avoid heavy scraping on the mastic joint
- Sort the mastic before the decorators arrive
Avoid painting over the new mastic, as traditional guidance advises. Ask us before any decorating around it.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall, so renewing it early is worth it.