Oxfordshire · England
Sand mastic for sash & case windows in Wantage, Oxfordshire
Sand mastic for Wantage and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Failed mastic on an exposed elevation
- Gaps round a timber door in stone or brick
- Modern sealant on a period surround
Landlords, agents and businesses in Wantage
For anyone letting property in or around Wantage, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
How we handle sand mastic in Wantage
Traditional burnt sand mastic blends with stone and brick surrounds. It’s a good fit for period properties, where modern sealant can look out of place. If you are dealing with draughty sash windows at the surround and gaps between timber frames and stone or brick, we can help, on timber door frames, sash and case windows and tenement windows alike.
Around Wantage, many houses have gained conservatories, French doors or replacement windows over time. Every addition brings more joints, each wearing at its own pace. Leaks generally start at a sill, a frame head or a glazing joint.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Wantage (OX12)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
When it isn’t the sealant
Before you book, it’s worth knowing the limits too:
- Whether work needs listed building consent
- Sash cords, weights and draught-proofing of the sashes
- Rotten sashes, sills or window boxes (a joiner’s job)
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Sash and case windows
- Timber door frames
- Stone surrounds
- Tenement windows
- Period & listed homes
- Brick reveals
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Towns and villages near Wantage
Other services in Wantage
Frames and glazing around Wantage
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Schools such as St Mary's School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. Homes close to Church of St Peter and St Paul include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Wantage is about 8 miles west of Didcot, in Oxfordshire. For sand mastic in and around Wantage, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We are based in Crawley and cover Oxfordshire, Wantage included. We cover 443 towns and villages across Oxfordshire, from the larger towns to small villages. You can also see our page for Oxford, roughly 14 miles from Wantage.
Here we cover the OX12 postcode area for sand mastic. That includes homes and businesses on Market Place, Limborough Road and Humber Close and the roads around them. Wantage is on the A338 and A417, which makes it straightforward to reach with everything needed for sand mastic. We also cover Charlton (1 mile east), East Challow (1 mile west), Letcombe Regis (2 miles south-west), West Challow (2 miles west) and Childrey (2 miles west). Within a short drive, we also cover Oxford (14 miles north-east), Didcot (8 miles east), Abingdon-on-Thames (8 miles north-east), Witney (14 miles north), Carterton (14 miles north-west) and Faringdon (8 miles north-west). As one of the bigger places in Oxfordshire, Wantage has homes, rented property and businesses of every kind.
Landmarks near Wantage
In Wantage, that means homes and buildings near King Alfred's, Betjeman Millennium Park and The Abingdon Arms and the streets around them. Well-known places in the area include Williams F1 Grand Prix Collection (1.9 miles north). Green spaces nearby include Letcombe Valley and Chain Hill.
The process
Most of a good job is in the preparation, so that is where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it generally takes a few hours for a single window, longer for several. For a job in Wantage, we need access to where the work is and somewhere nearby to park. For outside work, let us know about side access, gates and any upper-floor joints.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Clear the area around the work
- Plan for the work area to be out of bounds to pets and children
How to get a quote
For a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. We will give you a clear price before any work starts.
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FAQs for Wantage
Do you cover Wantage for sand mastic?
Yes. We work across London and the South East, and Wantage is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll give you a clear quote.
How do I get a quote for sand mastic in Wantage?
The easiest way is to call 0345 464 0079 or send us an email with a few details of the job. We will give you a clear price, with a fixed price before work begins.
Is sand mastic better than silicone for my windows?
That depends on your windows. Period windows in stone or brick generally suit sand mastic and newer frames normally get a flexible sealant.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
How long does sand mastic take to go off?
A skin forms quite soon, but full hardening takes longer. We will tell you what to expect for your job.
What guarantee comes with the work?
All our work has a 12-month guarantee, and we’re fully insured.
Can you replace silicone on a period window with sand mastic?
Normally, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
Do you offer different sealant colours?
In most cases you can choose. We’ll explain which colours are available.
How the job changes by surface
Tenement and terrace windows
Windows above ground floor need the right access. Tell us the height and we’ll confirm what’s needed.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Avoid patching sand mastic with silicone
- Ask us before painting near the mastic
- Get any rot dealt with first
- Sort the mastic before the decorators arrive
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger.
What happens if it’s left?
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic is the traditional material and finishes neatly against the masonry. Draughts from a gap round a frame, damp under a sill or water behind a bath panel all start small, and they’re far easier to fix early.
Rather than a set price list, 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 book with us
- Anti-fungal silicone where joints get wet
- Arbo and Everbuild products
- 180+ five-star Google reviews
- We never seal over old sealant
See what affects the cost and our reviews.