Hampshire · England
Sand Mastic in King's Somborne
Sand mastic for King's Somborne and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Crumbling sand mastic round a window
- Draughty sash windows at the surround
- Silicone on a period window that looks wrong
Sand mastic for homes and businesses in King's Somborne
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. We’re often asked to deal with mastic worn away on windows facing the weather and mastic round period door frames that has failed, across brick reveals, sash and case windows and tenement windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around King's Somborne is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we will put it right.
- Place
- King's Somborne (SO20)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
The process
At the end, we look at the finished work together and explain the cure time. The work normally takes a few hours for a single window, longer for several, depending on the amount of work. Somewhere as small as King's Somborne, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
- Mention any leaks or damp you’ve noticed
Get a quote
Want a quote for sand mastic? Please call 0345 464 0079 or email us with a few details. We’ll explain what we’d do and give you a clear price before work begins.
Read more
Sand mastic in King's Somborne: local notes
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 Mottisfont Abbey (about 3.2 miles south-west) are a reminder that the area around King's Somborne 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.
Schools such as King's Somborne Church of England Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. Homes close to Church of St Peter and St Paul include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in.
King's Somborne is about 6 miles north of Romsey, in Hampshire. Across the SO20 area, our applicators can take on sand mastic. King's Somborne is one of 683 places in Hampshire we cover. Southampton is on our list too, around 12 miles away.
Our applicators cover all of the SO20 postcode area for sand mastic and the streets around it. Whether your property is on Church Road, Old Palace Farm and Forge Close or a nearby road, we can help. You will find King's Somborne on the A3057, which makes it straightforward to reach with everything needed for sand mastic. If you’re just outside King's Somborne, we cover Ashley (1 mile east), Little Somborne (2 miles north-east), Up Somborne (2 miles north-east), Braishfield (4 miles south) and Lower Slackstead (4 miles south-east). Within a short drive, we also cover Winchester (7 miles east), Eastleigh (10 miles south-east), Andover (9 miles north), Totton (11 miles south), Chandler's Ford (8 miles south-east) and Hedge End (14 miles south-east).
Landmarks near King's Somborne
Locally, jobs take us to homes and businesses close to The Crown Public House and the streets around them. King's Somborne’s nearest station is Mottisfont & Dunbridge station, about 4 miles south-west of the centre. Well-known places in the area include Romsey Community Hospital (5.8 miles south).
DIY sealant or a professional job?
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. All the old material has to come out first.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
Leave it or put it right?
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and blends with the stone or brick. Around King's Somborne, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
Why choose Mr Mastic in King's Somborne
- Old sealant always removed completely
- 20+ years of sealant experience
- Anti-fungal silicone where joints get wet
- We leave the area clean and tidy
Read what affects the cost and customer reviews.
Your questions about sand mastic in King's Somborne
Is King's Somborne in your area for sand mastic?
Yes. Our work covers London and the South East, and King's Somborne is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Can you help a landlord with a rental near Mottisfont & Dunbridge station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
What should I tell you?
Tell us what needs doing and where, plus photos if you have them. We’ll ask anything else we need to know.
Can you do several jobs on one visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. If you’re redecorating the window, ask us first and we’ll talk you through it.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Can I choose the sealant colour?
We help you choose a colour that suits. The product needed can limit the range.
What do you put in the joint?
Each joint gets the product that suits it. Movement, water and weather all affect the choice.
Do you need sand mastic in King's Somborne?
Over the years, sand mastic weathers. It hardens, cracks and starts to come away on the stone or timber.
Common reasons people contact us are:
- Gaps round a timber door in stone or brick
- Draughts and rain around sash boxes
- Gaps where the frame meets the masonry
- Old sand mastic that has cracked, crumbled or fallen out
If you let a flat or house near Mottisfont & Dunbridge station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
What your quote should include
- Whether they’re fully insured
- Whether they seal over old material or remove it
- What the cure time is
- What happens if the job turns out different
For landlords and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Housing providers, facilities teams and property managers book us too in King's Somborne and across Hampshire. We can quote a run of properties together.
Also near King's Somborne
More services for King's Somborne
What affects the quote in King's Somborne
The quote reflects the job in front of us. We look at:
- Access and height
- Mould in or behind the old joints
- The number and length of the joints
- Which sealant suits the joint
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
What to tell us for a quote
To help us quote quickly, let us know:
- If it’s domestic, commercial or a hotel
- Any access issues, like height or stairs
- Roughly how big the job is
- The address or postcode of the job
For sand mastic in King's Somborne, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
What we cannot put right
We’ll always be straight with you, so here’s what sealant can’t fix:
- Planning or listed building consent (your local planning authority decides)
- Sashes that rattle, stick or will not open
- Cracked or broken glass
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Timber door frames
- Stone surrounds
- Sash and case windows
- Brick reveals
- Tenement windows
- Period & listed homes