Oxfordshire · England
Window Mastic in Hethe
Problem with your window and door frames in Hethe? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Gaps left after new windows were fitted
- A bead that does not match the frame
- Water coming in at the bottom corners of a door
Your questions about window mastic in Hethe
Do you work for landlords with property near Bicester North station?
Yes. We work for letting agents and landlords as well as householders. You can call 0345 464 0079 or email us with the details for a clear quote.
Will you come out to Hethe?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Where are you based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Are you insured?
Yes. We are fully insured, and we can confirm the details when we quote.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Can you work on commercial sites?
Yes. We have worked for hotels, offices and other businesses.
How do I get a quote for window mastic in Hethe?
Size, access and the old material all affect the cost. Call for a quick quote and we will talk you through it.
Do I have to be there?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
Window mastic for homes and businesses in Hethe
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. If you have cracked internal joints between frame and plaster and a bead that doesn’t match the frame, we can put it right, whatever the surface.
Around Hethe, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Place
- Hethe (OX27)
- Wider area
- Oxfordshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a few frames, or a day or more for a whole house. Somewhere like Hethe needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
How to prepare
- Tell us about any water getting in
- Keep children and pets away from the work area
- Mention any parking rules near the property
Getting a quote
We don’t publish a price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, ring 0345 464 0079 or send us an email.
Advice
What sealant work cannot fix
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Penetrating damp from a failed cavity tray or render
- Condensation trapped between the panes
- Soft or decayed wood in the frame
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Patio & French doors
- Aluminium frames
- Timber windows & doors
- uPVC windows
- Window sills
- Composite doors
Hethe homes and the weather
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Bicester North station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints. Schools such as Fringford Church of England Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Hethe is about 4 miles north of Bicester, in Oxfordshire. Whether you are in the middle of Hethe or further out, window mastic is available for homes and businesses alike. Hethe is one of 443 towns and villages in Oxfordshire where we work for window mastic. Oxford is on our list too, around 15 miles away.
Postcode districts we cover here for window mastic: OX27. If you need window mastic at a property on Main Street and Hardwick Road or a nearby road, we can help. We also cover Fringford (1 mile south-east), Hardwick (1 mile west), Stoke Lyne (2 miles south-west), Stratton Audley (2 miles south-east) and Caversfield (3 miles south). We also work in nearby towns such as Oxford (15 miles south), Banbury (11 miles north-west), Bicester (4 miles south), Kidlington (12 miles south-west), Headington Quarry (14 miles south) and Bure Park (4 miles south).
Around Hethe
We work in homes and buildings around Whitmore Arms Public House and the streets around them. For rail, the closest station is Bicester North station, about 4 miles south of the centre. Well-known places in the area include Bicester Community Hospital (4.6 miles south) and Beaumont Castle (3 miles north).
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Avoid blasting the frames with a pressure washer
- Make sure the drainage slots aren’t blocked
- Walk round the house once a year and look at the joints
- Keep paint off silicone joints
Keep the new mastic undisturbed while it cures, following the cure time we give you. Keep jet washers away from the frames.
Water gets in quietly when mastic fails. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
Towns and villages near Hethe
What else we do in Hethe
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
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.
Surface by surface
Window sills
The end joints of a sill tend to fail before the rest. A tight seal at each end keeps rain out of the wall.
Aluminium frames
Coated aluminium needs a compatible sealant and we avoid acetoxy silicones, which can react with some metals. Neutral-cure sealant is the safe choice.
Signs you need window mastic in Hethe
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
Common reasons people contact us include:
- Cold air getting in at the frame edge
- Cracked internal joints between frame and plaster
- Gaps where the sill meets the wall
- Untidy mastic left by window fitters
For an older house near a landmark such as Church of St Edmund and George, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What your quote should include
- What insurance they hold
- The length of the guarantee
- Who turns up on the day
- What preparation is included
What happens if it’s left?
Redecorating is a good moment to renew the mastic. A clean new bead makes new paint or render look finished. Around Hethe, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, phone 0345 464 0079 or send us an email for an honest opinion and a quote.
What you get with us
- 20+ years of sealant experience
- Domestic, commercial and hotel work
- You choose the colour before work begins
- ARBOMaster approved applicator
See our cost guide or what customers say.