Oxfordshire · England
Sand Mastic in Hethe
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Hethe and across Oxfordshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps between timber frames and stone or brick
- Mastic dropping out of the joint
- Window mastic to renew ahead of painting
About our sand mastic in Hethe
Sand mastic skins over fairly quickly but full hardening takes longer. Traditionally, sand mastic is left unpainted, so ask us before you decorate. If you have tired mastic found when preparing windows for paint and crumbling sand mastic round a window, we can put it right.
Homes in small places like Hethe often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Place
- Hethe (OX27)
- Region
- Oxfordshire
- Cover
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How it works
Before we leave, we go over the finished joints with you. The work normally takes a few hours for a single window, longer for several, depending on the size of the job. Somewhere as small as Hethe, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- 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.
- The finish is dressed neatly.
How to prepare
- Keep children and pets away from the work area
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
Get a quote
Want a quote for sand mastic? Please call 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Signs you need sand mastic in Hethe
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows.
It’s worth asking for a quote if you see:
- Gaps between timber frames and stone or brick
- Draughts and rain around sash boxes
- Crumbling sand mastic round a window
- Mastic that needs renewing before redecorating
Letting a property close to Bicester North station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Before booking anyone
- Who turns up on the day
- Is VAT in the price?
- Are they insured?
- How hidden problems are handled
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Timber that has rotted
- Crumbling stone or brickwork round the window
- Sashes that rattle, stick or won’t open
If you’re not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
What we seal
- Tenement windows
- Timber door frames
- Stone surrounds
- Period & listed homes
- Sash and case windows
- Brick reveals
Landlord and commercial work in Hethe
For anyone letting property in or around Hethe, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can go on one quote.
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Ask the planning authority about consent for listed or conservation-area homes
- Look over the window mastic once a year
- Avoid patching sand mastic with silicone
- Clear gutters so water doesn’t pour onto the windows
Do not run silicone over the new mastic. If you see a crack, ask us to take a look before trying a quick fix.
Renewing mastic before redecorating saves doing it twice. Painting over failed mastic hides the problem for a while.
Frames and glazing around Hethe
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.
For site and facilities teams at buildings such as Fringford Church of England Primary School, its window and door frames need their mastic kept sound, just like a home’s. In the older streets around Church of St Edmund and George, the joint between an old wall and a newer frame is normally the first place rain gets in.
Hethe is about 4 miles north of Bicester, in Oxfordshire. Homes, rented property, offices and hotels in Hethe can book us for sand mastic. Every job comes with our 12-month guarantee. Hethe is one of 443 towns and villages in Oxfordshire where we work for sand mastic. Oxford is on our list too, around 15 miles away.
Jobs for sand mastic in OX27 works the same way as everywhere else we cover. Local streets include Main Street and Hardwick Road, and we cover them all. If you’re just outside Hethe, we cover Fringford (1 mile south-east), Hardwick (1 mile west), Stoke Lyne (2 miles south-west), Stratton Audley (2 miles south-east) and Caversfield (3 miles south). Further out, we also cover Oxford (15 miles south), Banbury (11 miles north-west), Bicester (4 miles south), Kidlington (12 miles south-west), Headington Quarry (14 miles south) and Bure Park (4 miles south).
Landmarks near Hethe
Typical jobs here are in homes near Whitmore Arms Public House and the streets around them. Hethe’s nearest station is Bicester North station, roughly 4 miles south of the centre. Other landmarks nearby include Bicester Community Hospital (4.6 miles south) and Beaumont Castle (3 miles north).
What affects the quote in Hethe
You will get a clear quote before any work starts. It’s based on:
- Access and height
- How many areas need sealing
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins.
What to tell us for a quote
When you call or email, these details help:
- Pictures of the joints, sent by email
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
- How we’d reach the joints
We don’t publish a price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.
Also in Hethe
Common questions in Hethe
Can you help a landlord with a rental near Bicester North station?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Is Hethe in your area for sand mastic?
Yes, Hethe is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
What’s sand mastic made of?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
What does sand mastic cost?
Size, access and the old material all affect the cost. Call for a quick quote and we’ll talk you through it.
Will there be a smell?
There can be a smell while the sealant cures, which fades as it sets. Ventilation helps.
What should I tell you?
Let us know what needs doing and where. If we need more, we will ask.
Where do you work from?
We are a Crawley-based firm. We work across South East England, London and Scotland.
Are you insured?
Yes. We are fully insured, and we have been doing sealant work for more than 20 years.