Oxfordshire · England
Window & door mastic in Headington, Oxfordshire
Specialist window mastic for Headington: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Draughts coming in around windows and doors
- Sealant in the wrong colour for the frame
- Gaps left after new windows were fitted
Can I do it myself?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Window mastic for homes and businesses in Headington
There are two joints on most windows. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. Either or both can be done. Common call-outs are for a bead that doesn’t match the frame and draughts coming in around windows and doors, on patio & French doors, window sills and timber windows & doors.
In a smaller place like Headington, some walls face open ground and catch the full force of the weather. The mastic around frames on those walls tends to age faster.
We stand behind the work with a 12-month guarantee, so you are covered after we’ve gone.
- Place
- Headington (OX3)
- Wider area
- Oxfordshire
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Places near Headington
Other services in Headington
Landlords, agents and businesses in Headington
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
What happens if it’s left?
A quick bead over the top of old mastic looks like an easy fix, but new sealant can’t bond to old, crumbling mastic. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. Homes in smaller places like Headington can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, plus any working-time requirements on site. Call for a quick quote and we’ll explain what it covers.
Why choose Mr Mastic in Headington
- Every job guaranteed for a year
- You choose the colour before work begins
- Approved under the ARBOMaster scheme
- We’re fully insured
How the visit works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes most of a day for a typical house, less for a few frames from start to finish. Parking around Headington is generally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Let us know about parking restrictions
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we will take it from there.
Related advice
What affects the cost of window mastic
Every job gets its own quote. This is what makes a difference:
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
- How much there is to do
- The type of sealant required
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first and agree the price before starting.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Pictures of the joints, sent by email
- Any previous sealing or DIY work
- How we’d reach the joints
- The type of property
To get a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before work begins.
What we can’t put right
New sealant can’t fix everything, and we’d rather say so up front. It won’t solve:
- Broken hinges, locks or handles
- Condensation trapped between the panes
- Damp coming through the wall itself rather than the frame joint
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think before booking.
What we seal
- Window sills
- Aluminium frames
- Composite doors
- Timber windows & doors
- uPVC windows
- Patio & French doors
Headington questions
Is Headington in your area for window mastic?
Yes, Headington is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
I let a flat near Oxford station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Will new mastic stop draughts?
Yes, where the draught is at the frame edge. We check where the draught is before we start.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
Do you work on first-floor windows?
Yes, in most cases. Access is planned before we start, so mention the height and anything in the way.
Can I add another job to the visit?
Yes. Just list everything you need and we will quote it together.
Can I paint over the new sealant?
Not if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Different surfaces, different methods
Window sills
Sills catch the water running down the glass, so the sill ends and the joint under the frame are vital. They’re cut out and resealed with exterior sealant.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We can talk through the options.
Headington homes and the weather
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Holywell Manor (about 1.6 miles west) nearby, there’s older building stock in the area around Headington as well as newer homes. 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.
If you look after a building such as St Andrew's Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s. If you live in an older home near St Andrew's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you let a flat or house near Oxford station, renewing tired window mastic between tenants heads off draught and damp complaints.
Headington is about 1 mile north-east of Oxford, in Oxfordshire. Whether you are in the middle of Headington or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Oxfordshire, we cover 443 places, Headington among them.
Work in OX3 works the same way as everywhere else we cover. Streets in the area include Upway Road, Osler Road and Beech Road, and we cover them all. Neighbouring places we cover for window mastic include 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). Further out, we also cover 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).
Around Headington
Locally, jobs take us to homes and businesses close to White Hart Inn, Bury Knowle Park and Cheney School and the streets around them. Also close by 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, roughly 2.6 miles west of the centre. Nearby you’ll also find Rumble Museum (0.9 miles south-west) and Churchill Hospital (within half a mile west). Open spaces near Headington include CS Lewis Nature Reserve and Headington Hill.