Oxfordshire · England
Sand mastic for sash & case windows in Alkerton, Oxfordshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Alkerton, backed by a one-year guarantee. Ask us for a quote.
- Modern sealant on a period surround
- Draughts and rain around sash boxes
- Cracked mastic round a front door frame
Why deal with it now?
Not every filler suits an old window surround. Sand mastic matches what was there and that can be important for listed homes. Where a wall is exposed, as many are in small places like Alkerton, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Why us?
- Anti-fungal silicone where joints get wet
- Approved under the ARBOMaster scheme
- Neat joints and a tidy finish
- 12-month guarantee on every job
See our cost guide and what customers say.
About our sand mastic in Alkerton
Silicone on a period window often looks wrong and isn’t always the right material. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. If you have cement or filler used on old window joints that has cracked and cracked mastic round a front door frame, we can help, whatever the surface.
Homes in small places like Alkerton often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
All of our work is guaranteed for twelve months.
- Location
- Alkerton (OX15)
- Wider area
- Oxfordshire
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Alkerton questions
Is Alkerton within the area you cover?
Yes. Alkerton is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
What guarantee comes with sand mastic in Alkerton?
Every job comes with our 12-month guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
Do I need permission for sand mastic on a listed building?
Check with your local planning authority. They decide whether consent is needed.
Do the sealants smell?
Sometimes, a little. It fades as the sealant cures.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
Do you offer different sealant colours?
Generally, yes. Sealants come in white, clear, grey and other colours, and we agree the colour with you before any work starts.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. If you’re redecorating the window, ask us first and we’ll talk you through it.
Landlords, agents and businesses in Alkerton
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll quote.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Towns and villages near Alkerton
Other services in Alkerton
Different surfaces, different methods
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
What affects the cost of sand mastic
For a quick quote, just ask. The main things that affect it are:
- How many areas need sealing
- Whether there’s mould to deal with
- Working hours on commercial sites
- Whether old sealant or filler has to be cut out
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
What we need to know
Photos by email are helpful but not essential. Please mention:
- A few photos by email, if you can
- Where the job is, and your postcode
- What’s wrong with the joints now
- How we’d reach the joints
Every job is quoted individually, so start by telling us what you need. Simply ring 0345 464 0079 or send us an email and describe the job, and photos are welcome.
Do you need sand mastic in Alkerton?
Shallow joints are a common cause. A thin layer does not hold well, which is why we pack deep voids first and get the depth right.
Any of these means the joints need attention:
- Open joints round the window box
- Old cement repairs round a window that have failed
- Draughty sash windows at the surround
- Mastic that needs renewing before redecorating
For site and facilities teams at buildings such as Shenington Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- What happens if the job turns out different
- Whether you can choose the colour
- What product goes in the joint
- Whether VAT is included
The process
Before we leave, we go over the finished joints with you. The visit itself usually takes a few hours for a single window, longer for several, depending on the size of the job. Somewhere like Alkerton needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
How to prepare
- Move anything stored near the joints
- Tell us about access, such as stairs, a lift or high-level joints
- Mention if the joints have been sealed before
Get a quote
For a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before any work starts.
Related advice
Windows and doors in Alkerton
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Upton House (about 1.9 miles north) nearby, there’s older building stock in the area around Alkerton as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you live in an older home near Church of St Michael, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Alkerton is about 5 miles west of Banbury, in Oxfordshire. Alkerton gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 443 towns and villages across Oxfordshire, large and small. You can also see our page for Oxford, about 25 miles away.
Postcode districts we cover here for sand mastic: OX15. Close by, we work in Shenington (1 mile west), Balscote (1 mile south-east), Shutford (2 miles south), Epwell (2 miles south-west) and Swalcliffe (3 miles south). Further out, we also cover Banbury (5 miles east), Chipping Norton (11 miles south-west), Neithrop (4 miles east), Grimsbury (6 miles east), Ruscote (4 miles east) and Bloxham (5 miles south-east).
Landmarks near Alkerton
In Alkerton, that means homes and buildings near The Bell Inn and the streets around them. Nearby you will also find Hanwell Castle (3.7 miles east) and W. O. Bentley Memorial Foundation (1.8 miles east). Not far away are Edge Hill and Woodford Bottom and Lamb's Pool.
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Take care around the mastic when scraping paint
- Renew mastic before redecorating the windows
- Do not paint over the new mastic
- Clear gutters so water doesn’t pour onto the windows
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.