Hampshire · England
Overton Sand Mastic
Specialist sand mastic for Overton: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Gaps between timber frames and stone or brick
- A silicone bead on a sash window that spoils the look
- Crumbling sand mastic round a window
How to look after the new joints
A little care helps the new joints last. Our advice:
- Leave the new mastic unpainted
- Check with your local planning authority if your home is listed
- Look over the window mastic once a year
- Avoid heavy scraping on the mastic joint
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
How we handle sand mastic in Overton
On many period windows, sand mastic looks right and suits the building. Newer frames generally get a flexible sealant instead, and we’ll talk through which suits your home. Typical jobs include draughty sash windows at the surround and a silicone bead on a sash window that spoils the look, on timber door frames, sash and case windows and tenement windows.
In a smaller place like Overton, some walls face open ground and catch the full force of the weather. The mastic around frames on those walls tends to age faster.
All of our work is guaranteed for twelve months, in Overton and everywhere else we cover.
- Place
- Overton (RG25)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Overton: your questions answered
Can you help a landlord with a rental near Overton station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
Can you do sand mastic in Overton?
Yes, Overton is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll give you a clear price.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Where are you based?
Our base is in Crawley, and we cover South East England, London and all of Scotland.
When will the new mastic be hard?
Not straight away. The skin forms first, and the full set comes later and we will give you an idea for your job.
Can I choose the sealant colour?
Usually, yes. White, clear and grey are common, and other colours are available, and we will agree it with you first.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
What the job involves on each surface
Stone surrounds
Sand mastic sits naturally against stone. The finish blends with the masonry.
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. Sand mastic seals the joint round it.
What we do, step by step
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it normally takes a few hours per window, depending on the condition of the joints. For a job in Overton, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- 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.
Preparing for the visit
- Move anything stored near the joints
- Mention any tricky access
- Tell us about any water getting in
Ask for a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. Whenever you are ready, phone 0345 464 0079 or email us.
Related advice
Nearby places to Overton
Also in Overton
Honest limits
In fairness, there are a few things sealant won’t fix:
- Planning or listed building consent (your local planning authority decides)
- Putty and glazing repairs
- Damaged stone surrounds
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think.
Surfaces we seal
- Tenement windows
- Stone surrounds
- Sash and case windows
- Brick reveals
- Period & listed homes
- Timber door frames
Common problems we fix in Overton
Paint, silicone or cement used over old mastic causes problems. They do not suit the joint and we normally remove them.
The problems people generally mention when they call are:
- Gaps where the frame meets the masonry
- Draughts and rain around sash boxes
- Window mastic to renew ahead of painting
- Mastic dropping out of the joint
Homes close to Church of St Mary include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- What the quote includes, VAT included or not
- How hidden problems are handled
- What product goes in the joint
- When the joint can take water or movement
Windows and doors in Overton
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Overton Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Overton station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Overton is about 7 miles west of Basingstoke, in Hampshire. Overton gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Our Hampshire coverage runs to 683 places, and Overton is one of them. You can also see our page for Reading, about 19 miles away.
We cover every part of the RG25 postcode area for sand mastic. Local streets include High Street, Station Road and London Road, all of which we cover. We also cover the places around Overton: Southington (1 mile west), Quidhampton (1 mile north), Laverstoke (2 miles south-west), Freefolk (2 miles west) and Deane (2 miles east). We also work in nearby towns such as Basingstoke (7 miles east), Winchester (13 miles south), Andover (10 miles west), Alton (14 miles south-east), Tadley (9 miles north-east) and Hook (14 miles east).
Near you in Overton
Locally, jobs take us to homes and businesses close to The Greyhound pub and the streets around them. The nearest railway station is Overton station, roughly 0.8 miles north.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
What affects the cost of sand mastic
The quote reflects the job in front of us. We take into account:
- The product the joint needs
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
- How many areas need sealing
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we’ll go through it with you.
Asking for a quote
You do not need to know the technical terms. It helps if you can tell us:
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
- Any previous sealing or DIY work
- Where the job is, and your postcode
Asking for a quote is easy: let us know the job and the location. A few photos by email make the job easier to understand, and we will come back to you with a quote.