Oxfordshire · England
North Leigh Window Mastic
Mastic around window and door frames, sills and patio doors for homes and businesses in North Leigh and across Oxfordshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Water coming in at the bottom corners of a door
- Cold air getting in at the frame edge
- Sealant in the wrong colour for the frame
Window mastic in North Leigh, done properly
Around North Leigh we seal all kinds of frames: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. Typical jobs include gaps left after new windows were fitted and draughts coming in around windows and doors, across aluminium frames, composite doors and uPVC windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around North Leigh is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
There’s a 12-month guarantee on every job, large or small.
- Place
- North Leigh (OX29)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlords, agents and businesses in North Leigh
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
We also work for property managers and facilities teams in North Leigh and across Oxfordshire. We can quote a run of properties together, and we are fully insured for the work.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Walk round the house once a year and look at the joints
- Avoid harsh chemicals near the mastic
- Keep paint and stain on wooden frames in good order
- Avoid blasting the frames with a pressure washer
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
A failed joint lets water into the wall a little at a time. You might not see it until plaster blows or a damp patch appears inside. Early resealing stops it reaching that point.
Do you need window mastic in North Leigh?
Mastic ages in the weather. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
These are the problems we’re asked about most:
- Rushed sealant from a window installation
- Damp patches on the reveal after heavy rain
- Black, perished sealant on frames
- Gaps where the sill meets the wall
For landlords with property near Combe station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Before you book anyone
- Are they insured?
- Whether you can choose the colour
- What happens if the job turns out different
- When the joint can take water or movement
Questions from North Leigh
Will you come out to North Leigh?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is North Leigh in your area for window mastic?
Yes, North Leigh is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Can I paint over the new sealant?
Not normally, if it’s silicone. Tell us your decorating plans and we will pick a sealant to suit.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we’re using.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Will it make a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.
Do you guarantee window mastic?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
Windows and doors in North Leigh
Compared with the north and west, the South East gets less rain, 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 3.9 miles north-east) nearby, there’s older building stock in the area around North Leigh 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’s traditional sand mastic.
If you look after a building such as North Leigh Church of England (Controlled) School, larger buildings have plenty of frames, and the mastic around each one ages. Homes close to St Mary's Church include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in.
North Leigh is about 3 miles north-east of Witney, in Oxfordshire. For window mastic in and around North Leigh, please ring 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover Oxfordshire, North Leigh included. Across Oxfordshire, we cover 443 places, North Leigh among them. We also work in Oxford, about 10 miles from North Leigh.
Work in OX29 works the same way as everywhere else we cover. If you need window mastic at a property on Church Road, Cuckamus Lane and Windmill Heights or a nearby road, we can help. If you are just outside North Leigh, we cover New Yatt (1 mile west), East End (1 mile north-east), Freeland (2 miles east), Poffley End (2 miles west) and Delly End (2 miles west). We also work in nearby towns such as Oxford (10 miles south-east), Bicester (14 miles north-east), Abingdon-on-Thames (12 miles south-east), Witney (3 miles south-west), Carterton (7 miles south-west) and Wantage (15 miles south).
Around North Leigh
In North Leigh, that means homes and buildings near The Masons Arms Public House and Wood Green School. For rail, the closest station is Combe station, roughly 2.4 miles north-east. Well-known places in the area include Cogges Manor Farm Museum (2.5 miles south-west). For a walk, there’s Blenheim Farm.
What affects the cost of window mastic
Your quote is based on your job. We take into account:
- The product the joint needs
- Mould in or behind the old joints
- Access and height
- How many areas need sealing
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Asking for a quote
When you contact us, it’s useful to know:
- A few pictures by email, if you can
- Access, such as stairs, a lift or height
- Where the job is, and your postcode
- The type of property
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved and give you a clear quote.
More services for North Leigh
How it works
We bring everything the job needs with us, so there’s nothing for you to buy. Once we’ve agreed what’s being done, the area is protected and the work begins. Most jobs take most of a day for a typical house, less for a few frames. Somewhere as small as North Leigh, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check how each frame can be reached safely.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
How to prepare
- Move anything stored near the joints
- Mention any tricky access
- Mention any parking rules near the property
Get a quote
Every job is quoted individually, so start by telling us what you need. Just phone 0345 464 0079 or email us with the details.
Related advice
Why deal with it now?
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 peels before long, and water still gets in behind. The old mastic has to come out. Around North Leigh, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Doing several joints on one visit is generally more efficient than separate visits. We’ll give you a clear price for the lot.
Why North Leigh clients choose us
- Every job guaranteed for a year
- A sealant colour to suit the surroundings
- We leave the area clean and tidy
- You choose the colour before work begins
Read how sealant jobs are priced and our reviews.
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.