Oxfordshire · England
Sand mastic for sash & case windows in Headington, Oxfordshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Headington, with a 12-month guarantee on every job. Ask us for a quote.
- Cement or filler used on old window joints that has cracked
- Silicone on a period window that looks wrong
- Window mastic to renew ahead of painting
Sand mastic for homes and businesses in Headington
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. If you have mastic dropping out of the joint and patchy fillers round a sash window, we can help, on tenement windows, brick reveals and timber door frames alike.
Homes around Headington range from older properties to newer houses, and their windows range just as widely. Each frame material needs the right sealant against the right wall.
Our work is backed for twelve months, in Headington and everywhere else we cover.
- Place
- Headington (OX3)
- Region
- Oxfordshire
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
When it is not the sealant
We’d rather tell you now than do work that won’t last, so these are the limits:
- Planning or listed building consent (your local planning authority decides)
- Decayed frames that need repair
- Broken panes
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think before you book.
Joints and surfaces we work on
- Sash and case windows
- Tenement windows
- Brick reveals
- Period & listed homes
- Stone surrounds
- Timber door frames
Headington: your questions answered
I let a flat near Oxford station. Can you help?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Do you cover smaller places like Headington?
Yes. Headington is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Is it possible to take out silicone and use sand mastic instead?
Yes, we do this often. The old silicone has to come out completely so the mastic can sit properly.
Is it messy?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we’ll advise.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we’ll tell you what we’re using.
Landlords, agents and businesses in Headington
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Aftercare tips
After the cure time, these simple habits help:
- Don’t run silicone over sand mastic
- Make sure water runs off the sill
- Plan mastic work ahead of painting
- Have rotten timber repaired before new mastic goes in
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
Surface by surface
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Period and listed homes
Period homes look their best with traditional materials.
What sand mastic looks like in Headington
Historic houses like Holywell Manor (about 1.6 miles west) are a reminder that the area around Headington 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. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Oxford station? Then any sash windows need sound mastic to keep draughts and rain out. In the older streets around St Andrew's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Managing a site like St Andrew's Church of England Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Headington is about 1 mile north-east of Oxford, in Oxfordshire. Homes, rented property, offices and hotels in Headington can book us for sand mastic. The work is guaranteed for a year. Our area takes in 443 places across Oxfordshire.
Postcode districts we cover here for sand mastic: OX3. Local streets include Upway Road, Osler Road and Beech Road. Nearby, we also carry out sand mastic in Northway (1 mile north-west), Headington Quarry (1 mile south-east), Headington Hill (1 mile south-west), New Marston (1 mile west) and Oxford (1 mile south-west). We also work in nearby towns such as Didcot (11 miles south), Bicester (10 miles north), Abingdon-on-Thames (7 miles south-west), Witney (12 miles west), Thame (10 miles east) and Wantage (15 miles south-west).
Local landmarks in Headington
Around Headington, our work takes us to homes and buildings near White Hart Inn, Bury Knowle Park and Cheney School. Nearby too are Headington Rye Oxford (0.7 miles south-west), English Faculty Library (1.6 miles west) and Holy Trinity Church (0.8 miles south-east). For rail, the closest station is Oxford station, about 2.6 miles west of the centre. Well-known places in the area include Rumble Museum (0.9 miles south-west) and Churchill Hospital (under half a mile west). The countryside around Headington includes CS Lewis Nature Reserve and Headington Hill.
Nearby places to Headington
Other services in Headington
What affects the quote in Headington
Your quote is based on your job. We look at:
- Any mould that needs treating
- How much there is to do
- Working hours on commercial sites
- How many rooms, windows or areas are involved
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or drop us an email.
Helping us quote
Before you ask for a quote, have a think about:
- Any previous sealing or DIY work
- How we’d reach the joints
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, phone 0345 464 0079 or send us an email.
What happens if it’s left?
If you are redecorating, renew the mastic first. Painting over failed mastic does not seal it, and the new mastic is traditionally left unpainted. In a smaller place like Headington, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start.
Why us?
- Experience in homes, commercial sites and hotels
- Over 20 years’ experience
- Sanitary silicone with an anti-fungal additive in wet areas
- Old sealant always removed completely
Take a look at what affects the cost or what customers say.
How the visit works
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to a full day, depending on how many windows. In a smaller place like Headington, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Let us know about parking restrictions
- Where the joints are inside, avoid wetting them before we arrive
- Keep children and pets away from the work area
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.