Oxfordshire · England
Window Mastic in Lower Arncott
Mastic around window and door frames, sills and patio doors for householders, landlords and businesses in Lower Arncott. Fully insured, ARBOMaster approved and guaranteed for a year.
- Water coming in at the bottom corners of a door
- Draughts coming in around windows and doors
- Leaking joints at the ends of sills
Window mastic in Lower Arncott, done properly
There are two joints on most windows. Outside, the mastic keeps rain out; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. Typical jobs include old mastic that has gone black or come away and damp patches on the reveal after heavy rain, on window sills, aluminium frames and composite doors.
Outdoor sealant needs dry, clean surfaces, so work on frames around Lower Arncott is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
There’s a 12-month guarantee on every job, large or small.
- Place
- Lower Arncott (OX25)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Why act early in Lower Arncott
Working on frames from a ladder with a sealant gun isn’t easy, especially upstairs. A professional job is cut out properly, backed where needed and finished neatly, using a product chosen for the frame and wall. Around Lower Arncott, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or email us for an honest opinion and a quote.
Why Lower Arncott clients choose us
- Fully insured
- A sealant colour to suit the surroundings
- Trusted Arbo and Everbuild sealants
- ARBOMaster approved applicator
Take a look at what affects the cost or our reviews.
Window mastic in Lower Arncott: local notes
With historic houses such as Boarstall Tower (about 2.5 miles south) nearby, there’s older building stock in the area around Lower Arncott as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as Church of St Mary the Virgin, the joint between an old wall and a newer frame is normally the first place rain gets in. For site and facilities teams at buildings such as Five Acres Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Lower Arncott is about 3 miles south-east of Bicester, in Oxfordshire. From the centre of Lower Arncott to the outskirts, window mastic is available for homes and businesses alike. Our Oxfordshire coverage runs to 443 places, and Lower Arncott is one of them. Our Oxford page covers work nearby (9 miles or so).
Postcode districts we cover here for window mastic: OX25. Whether your property is on Ploughley Road and Willowbrook or anywhere close by, our applicators can take on the job. Other places close to Lower Arncott include Upper Arncott (1 mile south), Ambrosden (1 mile north), Merton (2 miles west), Murcott (2 miles south-west) and Fencott (2 miles south-west). We also work in nearby towns such as Oxford (9 miles south-west), Bicester (3 miles north-west), Abingdon-on-Thames (14 miles south-west), Thame (10 miles south-east), Kidlington (8 miles west) and Chinnor (14 miles south-east).
Landmarks near Lower Arncott
Around Lower Arncott, our work takes us to homes and buildings near The Plough pub, among other places. The closest station to Lower Arncott is Bicester Village station, about 2.8 miles north-west. Other landmarks nearby include Bicester Community Hospital (3.2 miles north-west) and Bicester Village (2.9 miles north-west). Not far away are Graven Hill and Woodsides Meadow.
Honest limits
It helps to know what we cannot do:
- Faulty window hardware
- Damp coming through the wall itself rather than the frame joint
- Draughts through the window seals rather than the frame
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
Surfaces we seal
- Aluminium frames
- Timber windows & doors
- Composite doors
- Window sills
- Patio & French doors
- uPVC windows
Surface by surface
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. Each is cleaned, backed where deep and resealed.
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so the joint needs a low-modulus sealant that stays flexible. We match white, brown, anthracite grey and black frames.
Landlord and commercial work in Lower Arncott
We also work for property managers and facilities teams in Lower Arncott and across Oxfordshire. Several sites can be quoted together.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.
What we are called out for in Lower Arncott
Sun, frost and rain wear sealant out. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
People usually contact us when they notice one of these:
- Sealant in the wrong colour for the frame
- Draughts coming in around windows and doors
- Mastic that has split away from the wall
- Gaps between the frame and the inside reveal
Rented homes near Bicester Village station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Questions to ask before you book
- What guarantee comes with the work
- What happens if the job turns out different
- What product goes in the joint
- How the joint is cleaned and prepared
How the visit works
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours for a few frames, or a day or more for a whole house. In a small place like Lower Arncott, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each frame is looked over and we agree which ones need resealing.
- 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.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Keep pets and children clear of the area while we work
- For business premises, tell us about site rules or sign-in
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, phone 0345 464 0079 or email us.
Read more
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
If you are set on DIY, put the effort into 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.
Lower Arncott: your questions answered
Do you work for landlords with property near Bicester Village station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can call 0345 464 0079 or email us with the details for a clear quote.
Is Lower Arncott in your area for window mastic?
Yes, Lower Arncott is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you will get one quote.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We explain the product when we quote.
Can you seal over the old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
Do you work on first-floor windows?
Yes, where they can be reached safely. Let us know about access when you ask for a quote so we can plan the job.