Oxfordshire · England
Long Hanborough Window Mastic
Mastic around window and door frames, sills and patio doors in Long Hanborough, with a one-year guarantee on every job. Ask us for a quote.
- Sealant in the wrong colour for the frame
- Old mastic that has gone black or come away
- Rain getting in at the frame or under the sill
Window mastic for homes and businesses in Long Hanborough
Most frames have an outside joint and an inside one. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. We work on aluminium frames, composite doors and window sills, and people most often call us about whistling draughts around closed windows and water coming in at the bottom corners of a door.
In a smaller place like Long Hanborough, some walls face open ground and catch the full force of the weather, so exposed windows and doors face the weather head on. That is hard on the mastic around frames and sills.
Each job carries a 12-month guarantee, large or small.
- Location
- Long Hanborough (OX29)
- Wider area
- Oxfordshire
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Why deal with it now?
If you are painting or rendering, reseal at the same time. A clean new bead makes new paint or render look finished, and it’s easier while the walls are being worked on anyway. In a smaller place like Long Hanborough, 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.
Leaving a failed joint generally makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why us?
- Every job guaranteed for a year
- Quality sealants from Arbo and Everbuild
- Full insurance on every job
- Any old sealant cut out fully, not covered over
Read what affects the cost or customer reviews.
FAQs for Long Hanborough
Do you cover Long Hanborough for window mastic?
Yes. Our work covers London and the South East, and Long Hanborough is part of that. You can call 0345 464 0079 or email us and let us know what needs doing, and we will send you a clear quote.
Do you work for landlords with property near Combe station?
Yes. We work for landlords and agents as well as householders. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Can you do upstairs windows?
Yes, as long as they can be reached safely. Let us know about access when you ask for a quote and we’ll plan for it.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
Where are you based?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Anthracite grey, black, brown and white cover most frames, with clear as an option.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
What window mastic looks like in Long Hanborough
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. With historic houses such as Blenheim Palace (about 1.9 miles north-east) nearby, there’s older building stock in the area around Long Hanborough as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For an older house near a landmark such as Christ Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Letting a property close to Combe station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Managing a site like Hanborough Manor CofE School? Then the mastic around its windows and doors needs looking after like any other building’s.
Long Hanborough is about 5 miles north-east of Witney, in Oxfordshire. For window mastic in and around Long Hanborough, please ring 0345 464 0079 or email us for a quick quote. We cover Oxfordshire from our Crawley base. Long Hanborough is one of 443 towns and villages in Oxfordshire we cover for window mastic. There’s also a page for Oxford, about 9 miles away.
We work across OX29 for window mastic and the streets around it. If you need window mastic at a property on Church Road, New Road and Churchill Way or anywhere close by, our applicators can take on the job. If you’re just outside Long Hanborough, we cover Church Hanborough (1 mile south-east), Bladon (2 miles east), Woodstock (3 miles north-east), Worton (3 miles south-east) and Begbroke (3 miles east). Larger places within reach include Oxford (9 miles south-east), Bicester (12 miles north-east), Abingdon-on-Thames (11 miles south-east), Witney (5 miles south-west), Carterton (9 miles south-west) and Grove (15 miles south).
Around Long Hanborough
We work in homes and buildings around Three Horseshoes pub. The closest station to Long Hanborough is Combe station, about 0.6 miles north of the centre. Well-known places in the area include Morris Motors Museum (1 mile east). Not far away are Blenheim Farm.
Different surfaces, different methods
Window sills
Where a sill meets brick or render, the ends often crack first. We reseal them so rain can’t run into the wall.
Composite doors
An exposed front door gets wind-driven rain. Those corners get the most care.
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Keep paint off silicone joints
- Clean frames with a soft cloth and soapy water
- Ventilate rooms so frames do not stay wet inside
- Check the mastic once a year
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
Landlords, agents and businesses in Long Hanborough
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
What else we do in Long Hanborough
What sealant work can’t fix
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Worn gaskets, brush seals or a door that has dropped
- Damp coming through the wall itself rather than the frame joint
- A frame that has rotted at the joint
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly.
Surfaces we seal
- uPVC windows
- Patio & French doors
- Composite doors
- Timber windows & doors
- Aluminium frames
- Window sills
How the visit works
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. The job generally takes a few hours for a few frames, or a day or more for a whole house. For a job in Long Hanborough, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Keep pets and children clear of the area while we work
- Mention if the joints have been sealed before
- Mention any sign-in or site rules at work premises
Get a quote
Want a quote for window mastic? Please ring 0345 464 0079 or send us an email with a few details. We’ll explain what we’d do and send you a clear quote before work begins.