Hampshire · England
Sand mastic for sash & case windows in Clanville, Hampshire
We cover Clanville for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Mastic round period door frames that has failed
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps between timber frames and stone or brick
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Decayed frames that need repair
- Sashes that need overhauling
- Masonry that needs repairing
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think.
Surfaces we seal
- Timber door frames
- Stone surrounds
- Tenement windows
- Sash and case windows
- Brick reveals
- Period & listed homes
Sand mastic in Clanville
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder, applied by hand. On period homes, it looks right where silicone wouldn’t. We work on stone surrounds, tenement windows and period & listed homes, and common reasons people get in touch are crumbling sand mastic round a window and cracked mastic round a front door frame.
Homes in small places like Clanville 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.
We stand behind the work with a one-year guarantee.
- Place
- Clanville (SP11)
- Region
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Clanville: your questions answered
Can you help a landlord with a rental near Andover station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Is Clanville within the area you cover?
Yes. Clanville is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What do you need from me for a quote?
Let us know what needs doing and where. We’ll ask anything else we need to know.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we’ll talk you through it.
Are you fully insured?
Yes. We’re fully insured for domestic and commercial work.
Where do you work from?
Mr Mastic is based in Crawley. We cover Clanville and the rest of Hampshire, along with the rest of our area.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
Can I add another job to the visit?
Yes. Just list everything you need and we will quote it together.
Common problems we fix in Clanville
Timber frames move with the seasons. The movement cracks the mastic over time.
Signs it’s time to call us include:
- Old cement repairs round a window that have failed
- Modern sealant on a period surround
- Wind and rain getting in round a sash window
- Failed mastic on an exposed elevation
In the older streets around St Margaret's Chapel, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Before you book anyone
- How hidden problems are handled
- What insurance they hold
- Is the old sealant removed completely?
- What product goes in the joint
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Look over the window mastic once a year
- Do not paint over the new mastic
- Avoid heavy scraping on the mastic joint
- Find out about consent before window work on a listed home
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
Renewing mastic before redecorating saves doing it twice. Paint over cracked mastic only covers it up.
What affects the quote in Clanville
Every job gets its own quote. This is what makes a difference:
- The type of sealant required
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Asking for a quote
What to tell us when you ask for a quote:
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
- The type of property
- What the problem is, such as mould, gaps, leaks or cracking
For a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We’ll send you a clear quote before any work starts.
Places near Clanville
Also in Clanville
How the job changes by surface
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.
Timber door frames
Round a period front door, sand mastic gives the right look.
Frames and glazing around Clanville
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as Appleshaw St Peter's CofE Primary School, the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Andover station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Clanville is about 4 miles north-west of Andover, in Hampshire. For sand mastic in and around Clanville, it’s easy to get a quote: please ring 0345 464 0079 or email us. We cover Hampshire from our Crawley base, Clanville included. 683 places in Hampshire are on our list. You can also see our page for Southampton, about 23 miles away.
Work in SP11 works the same way as everywhere else we cover. Neighbouring places we cover for sand mastic include Appleshaw (1 mile south-west), Redenham (1 mile west), Penton Mewsey (1 mile south-east), Chute Forest (1 mile north-west) and Penton Grafton (1 mile south). Larger places within reach include Andover (4 miles south-east), Tidworth (5 miles west), Weeke (15 miles south-east), Ludgershall (4 miles west), Whitchurch (9 miles east) and East Anton (4 miles east).
What’s near Clanville
Locally, jobs take us to homes and businesses close to The Lion pub, among other places. The closest station to Clanville is Andover station, about 3.2 miles south-east. A little further out are Andover Museum (3.7 miles south-east) and Andover War Memorial Hospital (2.9 miles south-east). Not far away are Anton Lakes and Mill Lake.
How it works
On the day, we look over the joints with you first, so you know exactly what we’re doing. We protect the surfaces around the joints before any work begins. Most jobs take anything from a few hours to a full day, depending on how many windows. For a village or hamlet like Clanville, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- Clear items away from the joints we’re working on
- Tell us if parking is tricky
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
Need a quote? Please phone 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.