Oxfordshire · England
Window & door mastic in Duns Tew, Oxfordshire
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Duns Tew. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Cracked or shrunken mastic around the frame
- Leaking joints at the ends of sills
- Damp patches on the reveal after heavy rain
Window mastic in Duns Tew, done properly
A cold draught around a closed window often comes from the frame edge. Resealing that joint can make a room feel noticeably less draughty. Where the air is getting in through the window itself, we’ll say so. We work on window sills, patio & French doors and uPVC windows, and common reasons people get in touch are cold air getting in at the frame edge and mastic that has split away from the wall.
Around Duns Tew, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
Big or small, it’s backed by our 12-month guarantee in Duns Tew and across Oxfordshire.
- Location
- Duns Tew (OX25)
- Region
- Oxfordshire
- Guarantee
- One year on every job
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
If you manage several properties in or around Duns Tew, several properties can go on one quote. Send us the addresses and the work at each.
Frames and glazing around Duns Tew
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around Church of St Mary Magdalene, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Duns Tew is about 8 miles south of Banbury, in Oxfordshire. We provide window mastic to homes and businesses in Duns Tew, as part of our work across Oxfordshire. 443 places in Oxfordshire are on our list, large and small. Oxford is on our list too, about 15 miles from Duns Tew.
Work in OX25 is quoted and booked the same way as anywhere else. If you need window mastic at a property on Main Street, Glebe Court and Middle Barton Road or a nearby road, we can help. Nearby, we also carry out window mastic in Dane Hill (1 mile north-east), North Aston (1 mile east), Middle Aston (1 mile south-east), Steeple Aston (2 miles south-east) and Nether Worton (2 miles west). Further out, we also cover Oxford (15 miles south), Banbury (8 miles north), Bicester (8 miles south-east), Witney (13 miles south-west), Kidlington (9 miles south) and Headington Quarry (14 miles south-east).
Near you in Duns Tew
Typical jobs here are in homes near The White Horse Inn. Duns Tew’s nearest station is Heyford station, about 2.8 miles south-east. Well-known places in the area include Old Forge Museum (Great Tew) (3.9 miles west) and Deddington Castle (2.1 miles north-east).
Aftercare tips
Good habits help new joints last longer. A few tips:
- Paint up to the joint, not over it
- Avoid blasting the frames with a pressure washer
- Clear any debris from frame drain holes
- Avoid harsh chemicals near the mastic
Most silicone sealants will not take paint, so mention any painting plans before any work starts. We can use a paintable sealant where that matters.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
What we do, step by step
At the end, we look at the finished work together and explain the cure time. The work normally takes anything from an hour or two to a full day, depending on how many frames there are, depending on the size of the job. In a small place like Duns Tew, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Clear the area around the work
- On commercial sites, let us know about site rules
Ask for a quote
If you’re in Duns Tew and need window mastic, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Advice
Other services in Duns Tew
Different surfaces, different methods
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the bottom joint sees the most water. We prepare and reseal every joint, backing the deep ones.
Patio & French doors
Heavy door frames can move more than windows. A flexible sealant copes with that.
Leave it or put it right?
Resealing frames is a short job: the visit takes a few hours for a few frames, or a day or more for a whole house. Leave it until water is coming in and you may need plastering and decorating as well. Around Duns Tew, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Combining jobs into one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear price for the lot.
Why book with us
- Any old sealant cut out fully, not covered over
- Colour agreed with you before work begins
- Homes, businesses and hotels
- Fully insured
Take a look at how sealant jobs are priced and customer reviews.
Do you need window mastic in Duns Tew?
Water runs down the glass onto the sill, and the ends of the sill, where it meets the wall, are where it gets in. Failed sealant there lets rain into the wall or behind the frame.
Most people get in touch when they notice one of these:
- Old mastic that has gone black or come away
- Untidy mastic left by window fitters
- Leaking joints at the ends of sills
- White mastic on grey or black frames
Letting a property close to Heyford station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Questions to ask before booking
- When the joint can take water or movement
- Whether all the old sealant comes out first
- Is VAT in the price?
- How hidden problems are handled
FAQs for Duns Tew
I let a flat near Heyford station. Can you help?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Do you cover smaller places like Duns Tew?
Yes, Duns Tew is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
How long will my window job take?
A handful of frames is a short visit. You’ll get a timescale with the quote.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Duns Tew, along with the rest of our area.
How long before the joint can be used?
Cure times vary by product and the temperature. We tell you how long to leave it before we go.
How do I get a quote for window mastic in Duns Tew?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or email us and let us know what needs doing and where.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Do you have sealant for grey or black windows?
Yes. We can use white, brown, anthracite grey, black or clear.