Hampshire · England
West Liss Sand Mastic
Professional sand mastic in and around West Liss, with every bit of old sealant taken out first and a 12-month guarantee.
- Crumbling sand mastic round a window
- Open joints round the window box
- Modern sealant on a period surround
How we handle sand mastic in West Liss
Silicone on a period window often looks wrong and does not suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. We work on brick reveals, timber door frames and tenement windows, and the jobs we see most are silicone on a period window that looks wrong and open joints round the window box.
In a village or hamlet like West Liss, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
There’s a 12-month guarantee on every job, whatever its size.
- Place
- West Liss (GU33)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
West Liss: your questions answered
Is West Liss within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work for landlords with property near Liss station?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
What’s sand mastic made of?
Sand plus a binder based on linseed oil. It’s applied by hand and shaped to suit the surround.
Which products 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’ll 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. Talk to us before any painting near it.
Do you guarantee sand mastic work?
Our 12-month guarantee applies on every job.
Do you offer different sealant colours?
Yes. Sealants come in white, clear, grey and other colours for many products, and we will agree it with you first.
Places near West Liss
Also in West Liss
How it works
You don’t need to clear the whole room or building, just the space around the work. We protect the rest, and the job takes a few hours for a single window, longer for several for a typical job. Somewhere as small as West Liss, 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.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Mention any tricky access
- Mention if the joints have been sealed before
- Keep children and pets away from the work area
Getting a quote
Want a quote for sand mastic? Please call 0345 464 0079 or send us an email with a few details. We’ll explain what we’d do and give you a clear price before any work starts.
Related advice
Can I do it myself?
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, then guaranteed for a year.
A DIY attempt does not rule out a professional job. We cut it out and start again.
What we can’t put right
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Putty and glazing repairs
- Rotten sashes, sills or window boxes (a joiner’s job)
- Damaged stone surrounds
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly before you book.
Where we work in West Liss
- Tenement windows
- Timber door frames
- Brick reveals
- Period & listed homes
- Stone surrounds
- Sash and case windows
What sand mastic looks like in West Liss
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.
For an older house near a landmark such as Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. For landlords with property near Liss station, older sash windows in a rental need their mastic kept sound to keep the weather out.
West Liss is about 3 miles north-east of Petersfield, in Hampshire. Our applicators cover sand mastic for homes and businesses in West Liss, as part of our work across Hampshire. Our Hampshire coverage runs to 683 places, and West Liss is one of them. We also work in Portsmouth, around 18 miles away.
All of GU33 is covered for sand mastic, from the main roads to the quietest streets. We cover properties on Syers Road, Willow Road and Inwood Road. Nearby, we also carry out sand mastic in Liss (1 mile north-east), Durford Wood (1 mile south), Hill Brow (1 mile south-east), Liss Forest (1 mile north) and The Mint (1 mile north-east). Larger places within reach include Havant (13 miles south), Horndean (10 miles south-west), Aldershot (15 miles north), Alton (8 miles north-west), Waterlooville (12 miles south-west) and Petersfield (3 miles south-west).
Near you in West Liss
Around West Liss, our work takes us to homes and buildings near Crossing Gates pub and the streets around them. West Liss has its own railway station: Liss station. A little further out are Bear Museum (3.1 miles south-west) and Petersfield Community Hospital (3.2 miles south-west). For a walk, there’s Wheatham Hill and Liss Riverside Railway Walk South.
How the job changes by surface
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Common problems we fix in West Liss
Timber frames move with the seasons. That movement opens up the mastic joint over time.
These are the problems we’re asked about most:
- Mastic that needs renewing before redecorating
- Mastic round period door frames that has failed
- Modern sealant on a period surround
- Old cement repairs round a window that have failed
For site and facilities teams at buildings such as Liss Infant School, larger buildings have plenty of frames, and the mastic around each one ages.
Before you book anyone
- How long to leave it before use
- Which colour the sealant will be
- Whether VAT is included
- What guarantee comes with the work
Why it’s worth doing now in West Liss
Replacing sash windows is a big decision for a period home and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Around West Liss, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first.
Why choose Mr Mastic in West Liss
- Any old sealant cut out fully, not covered over
- Sanitary silicone with an anti-fungal additive in wet areas
- Over 20 years’ experience
- Full insurance on every job
What affects the cost of sand mastic
Every job gets its own quote. These are the things that affect it:
- The size of the job
- How easy the joints are to reach
- Working hours on commercial sites
- The product the joint needs
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- Whether it’s a home or a business
- Whether it has been sealed before
- Access, such as stairs, a lift or height
- The rough size of the job
For a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before we start.