Buckinghamshire · England
Sand mastic for sash & case windows in Adstock, Buckinghamshire
We cover Adstock for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Failed mastic on an exposed elevation
- Draughty sash windows at the surround
- Old sand mastic that has cracked, crumbled or fallen out
What sealant work can’t fix
New sealant cannot fix everything, and we will tell you before we start. It will not solve:
- Sashes that rattle, stick or won’t open
- Masonry that needs repairing
- Decisions on consent for listed homes
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in Adstock
- Tenement windows
- Timber door frames
- Sash and case windows
- Brick reveals
- Period & listed homes
- Stone surrounds
About our sand mastic in Adstock
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 older homes, it suits the building far better than silicone. Common call-outs are for mastic that needs renewing before redecorating and silicone on a period window that looks wrong, on brick reveals, timber door frames and tenement windows.
Around Adstock, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
You are covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Location
- Adstock (MK18)
- Region
- Buckinghamshire
- Guarantee
- A year, on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Adstock
Every job gets its own quote. These are the things that affect it:
- Working hours on commercial sites
- How many areas need sealing
- Mould in or behind the old joints
- The type of sealant required
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and agree the price before starting.
Helping us quote
Before you ask for a quote, have a think about:
- Roughly how big the job is
- The problem you’ve noticed
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
What we’re called out for in Adstock
Previous repairs in cement or silicone often trap water or crack away. They do not suit the joint and we normally remove them.
Any of these means the joints need attention:
- Mastic worn away on windows facing the weather
- Window mastic to renew ahead of painting
- Silicone on a period window that looks wrong
- Old sand mastic that has cracked, crumbled or fallen out
If you live in an older home near Church of St Cecilia, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What your quote should include
- What the cure time is
- How hidden problems are handled
- How much experience the applicator has
- Whether the sealant suits the joint
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Windows and doors in Adstock
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. Historic houses like Claydon House (about 3.2 miles south) are a reminder that the area around Adstock has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Schools such as Padbury Church of England School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Adstock is about 3 miles south-east of Buckingham, in Buckinghamshire. Adstock gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 263 places across Buckinghamshire, from the larger towns to small villages. For nearby work, see our Oxford page.
Postcode districts we cover here for sand mastic: MK18. That includes homes and businesses on Main Street, East Street and Greenfields and the roads around them. Neighbouring places we cover for sand mastic include Padbury (1 mile west), Thornborough (2 miles north), East Claydon (3 miles south), Middle Claydon (3 miles south-west) and Steeple Claydon (3 miles south-west). Within a short drive, we also cover Aylesbury (11 miles south-east), Elmhurst (11 miles south-east), Southcourt (12 miles south-east), Haydon Hill (10 miles south), Turnfurlong (12 miles south-east) and Haddenham (13 miles south).
Near you in Adstock
Typical jobs here are in homes near Sir Thomas Fremantle School and The Folly Inn and the streets around them. Other landmarks nearby include Buckingham Community Hospital (3.5 miles north-west) and Buckingham Castle (3.5 miles north-west). Open spaces near Adstock include Buckingham Sand Pit.
Towns and villages near Adstock
Other services in Adstock
Aftercare tips
Good habits help new joints last longer. A few tips:
- Ask the planning authority about consent for listed or conservation-area homes
- Renew mastic before redecorating the windows
- Make sure water runs off the sill
- Do not run silicone over sand mastic
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Sound mastic protects the frame. Failed mastic lets water reach the timber, which can lead to rot.
The process
We bring everything the job needs with us, so you do not need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. Most jobs take anything from a few hours to a full day, depending on how many windows. Somewhere as small as Adstock, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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 leaks or damp you’ve noticed
- Plan for the work area to be out of bounds to pets and children
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
Need a quote? Please call 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear price before work begins.
Advice
Questions from Adstock
Is sand mastic in Adstock guaranteed?
All our work, in Adstock and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Do you cover Adstock for sand mastic?
Yes, Adstock is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear price.
Is it possible to take out silicone and use sand mastic instead?
Yes, we do this often. All the old silicone is removed first so the mastic beds in well.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Does someone need to be in?
That depends on where the joints are. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
What’s sand mastic made of?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and finished to sit neatly against the masonry.
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
Landlords and agents in Adstock can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.