Hampshire · England
Sand mastic for sash & case windows in Exton, Hampshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Exton and across Hampshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Modern sealant on a period surround
- Draughty sash windows at the surround
- Gaps round a timber door in stone or brick
Sand mastic in Exton
Across Exton, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand for a neat, traditional finish. If you’re dealing with cracked mastic round a front door frame and silicone on a period window that looks wrong, we can put it right, on stone surrounds, sash and case windows and brick reveals alike.
Homes in small places like Exton often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
Whatever the size of the job, you get the same one-year guarantee in Exton and across Hampshire.
- Location
- Exton (SO32)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Questions from Exton
What guarantee comes with sand mastic in Exton?
Every job comes with our 12-month guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Is Exton in your area for sand mastic?
Yes. We work across London and the South East, and Exton is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
I’m a tenant. Can you help?
Yes. Check with your landlord; we can send the quote to them too.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in.
When will the new mastic be hard?
A skin forms quite soon, but full hardening takes longer. We will explain what to expect before we leave.
Should I check with the council before work on a listed or conservation-area home?
It’s best to ask your local planning authority first. Sand mastic is often favoured as like for like, but they decide.
How long will you be here?
It depends on the size of the job, but as a guide it takes a few hours per window, depending on the condition of the joints. We’ll tell you when we quote.
Is there any odour?
There can be a smell while the sealant cures, which fades as it sets. Opening a window helps.
Nearby places to Exton
More services for Exton
Windows and doors in Exton
Historic houses like Hinton Ampner House (about 4.2 miles north) are a reminder that the area around Exton has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Meonstoke Church of England Infant School, larger buildings have plenty of frames, and the mastic around each one ages.
Exton is about 7 miles north-west of Horndean, in Hampshire. For sand mastic in and around Exton, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We’re based in Crawley and cover Hampshire, Exton included. Exton is one of 683 towns and villages in Hampshire where we work. For nearby work, see our Southampton page, about 12 miles away.
All of SO32 is covered for sand mastic. Local streets include Shoe Lane, Church Lane and Beacon Hill Lane. Nearby, we also carry out sand mastic in Corhampton (1 mile south), Meonstoke (1 mile south), Brockbridge (1 mile south), Droxford (2 miles south) and Soberton (3 miles south). We also work in nearby towns such as Winchester (10 miles north-west), Gosport (12 miles south), Havant (10 miles south-east), Eastleigh (10 miles west), Fareham (10 miles south) and Horndean (7 miles south-east).
Landmarks near Exton
In Exton, that means homes and buildings near The Shoe Inn and the streets around them. Green spaces nearby include St Clair's Meadow and Beacon Hill.
Should I try it myself first?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
How we quote for sand mastic
Every job gets its own quote. This is what makes a difference:
- The old material and how stubborn it is
- How easy the joints are to reach
- When we can work, for business premises
- The size of the job
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or send us an email.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- If it’s domestic, commercial or a hotel
- Access, such as stairs, a lift or height
- The rough size of the job
- The address or postcode of the job
We don’t publish a price list. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.
When it isn’t the sealant
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- Crumbling stone or brickwork round the window
- Sashes that need overhauling
- Cracked or broken glass
If you’re not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
Joints and surfaces we work on
- Period & listed homes
- Timber door frames
- Stone surrounds
- Sash and case windows
- Brick reveals
- Tenement windows
What we’re called out for in Exton
Previous repairs in cement or silicone often trap water or crack away. They do not suit the joint and we normally remove them.
Most people get in touch when they notice something like this:
- A silicone bead on a sash window that spoils the look
- Cracked mastic round a front door frame
- Open joints round the window box
- Crumbling sand mastic round a window
If you live in an older home near Church of St Peter and St Paul, the joint between an old wall and a newer frame is usually the first place rain gets in.
What your quote should include
- Which colour the sealant will be
- Which sealant they’ll use, and why
- How the surfaces are prepared before sealing
- What insurance they hold
What we do, step by step
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes a few hours for a single window, longer for several, depending on the size of the job. For a village or hamlet like Exton, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- 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.
Preparing for the visit
- Clear the area around the work
- Try not to wet indoor joints just before the visit
- Mention if the joints have been sealed before
Getting a quote
For sand mastic in Exton, ring 0345 464 0079 or email us. Tell us what the problem is and where, and you’ll get a clear quote before work begins.
Read more
Leave it or put it right?
New sash windows are a major, costly change, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. In a small place like Exton, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
What you get with us
- More than 20 years in sealant work
- Full insurance on every job
- Domestic, commercial and hotel work
- One-year guarantee on every job
See what affects the cost or our reviews.