Buckinghamshire · England
Window & door mastic in Upton, Buckinghamshire
Our applicators work in Upton on mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and a one-year guarantee.
- Black, perished sealant on frames
- Whistling draughts around closed windows
- Water coming in at the bottom corners of a door
How we handle window mastic in Upton
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. We seal one or both, depending on what’s needed. Typical jobs include draughty joints inside around the window and gaps left after new windows were fitted, on timber windows & doors, composite doors and uPVC windows.
Somewhere as small as Upton, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
A 12-month guarantee comes as standard, so you are covered after we have gone.
- Place
- Upton (HP17)
- Wider area
- Buckinghamshire
- Guarantee
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Window sills
Every drop off the glass ends up on the sill, so the joints at each end and underneath matter. They’re cut out and resealed with exterior sealant.
Patio & French doors
Water at the foot of a door frame isn’t always the mastic: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We check before we reseal.
Also near Upton
What else we do in Upton
FAQs for Upton
Will you come out to Upton?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is Upton in your area for window mastic?
Yes, Upton is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Can you match the sealant to my frames?
Yes. White, brown, anthracite grey, black and clear sealants are all available, so the joint suits the frame.
How long does it take to reseal the windows on a house?
A few frames take a few hours. We confirm the timing with your quote.
How much does window mastic cost in Upton?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or email us and tell us what needs doing and where.
Do you work for letting agents?
Yes. As well as householders, we work for landlords, agents, businesses and hotels.
Can you reach windows above the ground floor?
Normally, yes. We plan safe access before the job, so mention the height and anything in the way.
Do you have insurance?
Yes. Mr Mastic is fully insured.
How the visit works
Most of a good job is in the preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a morning for a couple of windows and a door. For a village or hamlet like Upton, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Let us know about earlier repairs to the joints
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
Getting a quote
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
Related advice
What we are called out for in Upton
Timber windows bring their own problems. Mastic painted over many times cracks with the paint, and the wood moves with damp as well as heat.
The problems people usually mention when they call are:
- Gaps where the sill meets the wall
- Draughts coming in around windows and doors
- Sealant in the wrong colour for the frame
- Gaps left after new windows were fitted
Letting a property close to Aylesbury Vale Parkway station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Questions to ask before you book
- Whether you can choose the colour
- Are they insured?
- How the joint is cleaned and prepared
- The length of the guarantee
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Keep drainage slots and sill grooves clear
- Walk round the house once a year and look at the joints
- Use gentle cleaners on frames and sealant
- Keep jet washers away from the mastic
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. Resealing closes it.
What sealant work can’t fix
A few problems are outside what sealant work can do:
- A door that needs adjusting, rehanging or new seals
- Broken hinges, locks or handles
- Condensation trapped between the panes
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer.
What we seal
- Timber windows & doors
- Aluminium frames
- uPVC windows
- Composite doors
- Patio & French doors
- Window sills
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too in Upton and across Buckinghamshire. We can quote a run of properties together, and we’re fully insured for the work.
We work for landlords and letting agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
Window mastic in Upton: local notes
Historic houses like Waddesdon Manor (about 3.9 miles north-west) are a reminder that the area around Upton has older buildings as well as new. 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, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Homes close to Church of Saints Peter and Paul include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. For site and facilities teams at buildings such as Stone Church of England Combined School, the mastic around its windows and doors needs looking after like any other building’s.
Upton is about 3 miles south-west of Aylesbury, in Buckinghamshire. Homes, rented property, offices and hotels in Upton is covered for window mastic. The work is guaranteed for a year. Upton is one of 263 towns and villages in Buckinghamshire where we work. Oxford is on our list too, around 15 miles away.
Work in HP17 works the same way as everywhere else we cover. Streets in the area include Homestead Close, Lower Farm Gate and Upton Road, all of which we cover. We also cover the places around Upton: Dinton (1 mile south-west), Ford (1 mile south), Sedrup (2 miles east), Bishopstone (2 miles east) and Walton Court (3 miles east). We also work in nearby towns such as Aylesbury (3 miles north-east), High Wycombe (13 miles south-east), Chesham (13 miles south-east), Buckingham (15 miles north), Amersham (15 miles south-east) and Elmhurst (4 miles north-east).
Around Upton
Around Upton, our work takes us to homes and buildings near The Seven Stars Public House. The nearest railway station is Aylesbury Vale Parkway station, roughly 2.5 miles north of the centre. Other landmarks nearby include Roald Dahl Children's Gallery (3.2 miles north-east) and St John's Hospital (within half a mile north-east). Green spaces nearby include Snakemoor.
Quotes for window mastic in Upton
Every job gets its own quote. This is what makes a difference:
- The old material and how stubborn it is
- Working hours on commercial sites
- The product the joint needs
- Access and height
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or email us.
What we need to know
Before you ask for a quote, have a think about:
- The type of property
- The problem you’ve noticed
- Where the job is, and your postcode
- Any access issues, like height or stairs
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you’re ready, call 0345 464 0079 or send us an email.