Hampshire · England
Chawton Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Chawton, with a one-year guarantee on every job. Call for a quick quote.
- Failed mastic on an exposed elevation
- A silicone bead on a sash window that spoils the look
- Open joints round the window box
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Broken panes
- Decisions on consent for listed homes
- Crumbling stone or brickwork round the window
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before booking.
Joints and surfaces we work on
- Brick reveals
- Timber door frames
- Sash and case windows
- Stone surrounds
- Tenement windows
- Period & listed homes
How we handle sand mastic in Chawton
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant, and we will talk through which suits your home. Typical jobs include a silicone bead on a sash window that spoils the look and draughty sash windows at the surround, on brick reveals, stone surrounds and sash and case windows.
Somewhere as small as Chawton, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Place
- Chawton (GU34)
- Wider area
- Hampshire
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Landlords, agents and businesses in Chawton
We also work for property managers and facilities teams in Chawton and across Hampshire. We can quote a run of properties together, and we’re fully insured for the work.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Chawton: your questions answered
I let a flat near Alton station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Do you cover smaller places like Chawton?
Yes, Chawton is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Which is right for my windows, sand mastic or modern sealant?
It depends on the window. On many period windows, sand mastic looks right and suits the building and newer frames normally get a flexible sealant.
What is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
How long does sand mastic take to go off?
Not straight away. It skins first and hardens fully later and we will give you an idea for your job.
Nearby places to Chawton
What else we do in Chawton
Quotes for sand mastic in Chawton
We quote each job individually. These are the things that affect it:
- Whether there’s mould to deal with
- Any working-time requirements on site
- The old material and how stubborn it is
- The number of rooms or windows
Leaving a failed joint normally makes the job bigger, not smaller. If you are unsure, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- Access, such as stairs, a lift or height
- Whether it has been sealed before
- The address or postcode of the job
- Photos by email, if that is easy
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll talk you through the work and give you a clear price.
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
How the job changes by surface
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. We renew it the same way as on windows.
Period and listed homes
A traditional finish suits a period property, and sand mastic is one of them.
Windows and doors in Chawton
Historic houses like Bentworth Hall (about 2.8 miles west) are a reminder that the area around Chawton has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. 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 Alton station, any sash windows need sound mastic to keep draughts and rain out. If you live in an older home near Church of St Nicholas, the joint between an old wall and a newer frame is normally the first place rain gets in.
Chawton is about 1 mile south-west of Alton, in Hampshire. For sand mastic in and around Chawton, please ring 0345 464 0079 or email us for a quick quote. We cover Hampshire from our Crawley base, Chawton included. 683 places in Hampshire are on our list, large and small. There’s also a page for Reading, roughly 22 miles from Chawton.
Our applicators cover all of the GU34 postcode area for sand mastic. That includes homes and businesses on Winchester Road and Wolf's Lane and the roads around them. Other places close to Chawton include Alton (1 mile north-east), Upper Farringdon (2 miles south), Lower Farringdon (2 miles south), Farringdon (2 miles south) and Hartley Mauditt (2 miles south-east). Further out, we also cover Basingstoke (10 miles north-west), Winchester (15 miles west), Farnborough (15 miles north-east), Fleet (12 miles north-east), Aldershot (13 miles north-east) and Petersfield (9 miles south).
What’s near Chawton
In Chawton, that means homes and buildings near The Greyfriar pub and Amery Hill School, among other places. Chawton’s nearest station is Alton station, about 1.6 miles north-east. A little further out are Allen Gallery (1.3 miles north-east) and Alton Community Hospital (less than half a mile north). Open spaces near Chawton include King's Hill.
What happens on the day
You don’t need to clear the whole room or building before we come, only the area right around the joints. We protect the rest, and the work takes anything from a few hours to a full day, depending on how many windows in most cases. In a small place like Chawton, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
- Try not to wet indoor joints just before the visit
Get a quote
Need a quote? Please call 0345 464 0079 or email us and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
What we’re called out for in Chawton
Age is the main cause. Sand mastic is a maintenance item like any pointing, depending on exposure and upkeep.
The problems people normally mention when they call include:
- Open joints round the window box
- Mastic dropping out of the joint
- Patchy fillers round a sash window
- Draughty sash windows at the surround
Managing a site like Chawton Church of England Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before booking
- How the surfaces are prepared before sealing
- What happens if the job turns out different
- The length of the guarantee
- What the quote includes, VAT included or not