Hampshire · England
Cliddesden Sand Mastic
We cover Cliddesden for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Cement or filler used on old window joints that has cracked
- Draughty sash windows at the surround
- Gaps where the frame meets the masonry
What we do, step by step
All our tools and materials come with us in the van, so there’s nothing for you to buy. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours for a single window, longer for several. For a village or hamlet like Cliddesden, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- Mention any leaks or damp you’ve noticed
- On commercial sites, let us know about site rules
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. Whenever you’re ready, call 0345 464 0079 or send us an email.
Advice
Sand mastic for homes and businesses in Cliddesden
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. Typical jobs include old sand mastic that has cracked, crumbled or fallen out and tired mastic found when preparing windows for paint, across tenement windows, stone surrounds and brick reveals.
Homes in small places like Cliddesden 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.
A 12-month guarantee comes as standard, so you’re not left on your own once the job is done.
- Place
- Cliddesden (RG25)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Find out about consent before window work on a listed home
- Avoid patching sand mastic with silicone
- Inspect the joints round the windows every year or so
- Clear gutters so water does not pour onto the windows
Avoid painting over the new mastic, which is the traditional advice. Ask us before any decorating around it.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
Common problems we fix in Cliddesden
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Look out for these signs:
- Silicone on a period window that looks wrong
- Crumbling sand mastic round a window
- Gaps where the frame meets the masonry
- Failed mastic on an exposed elevation
Managing a site like Cliddesden Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- How the colour is chosen
- What preparation is included
- Whether they’re fully insured
- Whether they seal over old material or remove it
Can I do it myself?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
What happens if it’s left?
New sash windows are a major, costly change and on a listed home, consent may be needed. Where the frames are in good order, new mastic seals the surround. Older cottages and farmhouses around Cliddesden can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
The cost depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts.
Why Cliddesden clients choose us
- Experience in homes, commercial sites and hotels
- Any old sealant cut out fully, not covered over
- Rated 4.9 stars on Google
- Anti-fungal sanitary silicone in wet areas
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Cracked or broken glass
- Sashes that rattle, stick or won’t open
- Masonry that needs repairing
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Period & listed homes
- Brick reveals
- Stone surrounds
- Tenement windows
- Sash and case windows
- Timber door frames
Cliddesden questions
Can you do sand mastic in Cliddesden?
Yes, Cliddesden 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 tell us what needs doing.
Can you help a landlord with a rental near Basingstoke station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
How long does sand mastic take to harden?
It forms a skin fairly soon and it hardens fully over a longer time. Timing depends on the weather and the joint.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
Will there be a smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we will tell you what we are using.
Is it possible to paint over sand mastic?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
Cliddesden homes and the weather
Historic houses like The Vyne (about 4.8 miles north) are a reminder that the area around Cliddesden 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you let a flat or house near Basingstoke station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Homes close to Church of St Leonard include some older properties, and the joint between an old wall and a newer frame is normally the first place rain gets in.
Cliddesden is about 2 miles south of Basingstoke, in Hampshire. Every kind of property in Cliddesden is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. Cliddesden is one of 683 places in Hampshire where we work for sand mastic. We also work in Reading, around 15 miles away.
Jobs for sand mastic in RG25 is quoted and booked the same way as anywhere else. Local streets include Station Road, Church Lane and Hoopersmead. Other places close to Cliddesden include Viables (1 mile north), Eastrop (2 miles north), Ellisfield (2 miles south), Oakridge (2 miles north) and Upper Common (2 miles south). Within a short drive, we also cover Farnborough (15 miles east), Fleet (11 miles east), Aldershot (15 miles east), Alton (8 miles south-east), Yateley (13 miles north-east) and Tadley (8 miles north).
Around Cliddesden
In Cliddesden, that means homes and buildings near Brighton Hill Community School, Hackwood Park and Jolly Farmer Public House and the streets around them. The nearest railway station is Basingstoke station, roughly 2.2 miles north of the centre. A little further out are Basing House (2.9 miles north-east) and Festival Place (2 miles north). Open spaces near Cliddesden include Farleigh Hill and The Mill Field.
Towns and villages near Cliddesden
Other services in Cliddesden
How the job changes by surface
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
Tenement and terrace windows
Upper-floor windows need access planning. Let us know the floor and we will confirm access.