Hampshire · England
Window & door mastic in Upper Kingston, Hampshire
We cover Upper Kingston for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- Old mastic that has gone black or come away
- Cold air getting in at the frame edge
- Water coming in at the bottom corners of a door
How we handle window mastic in Upper Kingston
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. Our applicators cut it out and replace it with a flexible, weatherproof sealant. Typical jobs include untidy mastic left by window fitters and mastic that’s falling out in pieces, on window sills, patio & French doors and uPVC windows.
In a village or hamlet like Upper Kingston, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Upper Kingston (BH24)
- Wider area
- Hampshire
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Upper Kingston: your questions answered
Is there a guarantee on window mastic in Upper Kingston?
All our work, in Upper Kingston and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Is Upper Kingston in your area for window mastic?
Yes. We work across London and the South East, and Upper Kingston is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you.
Can you get sealant to suit coloured frames?
Yes. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply phone 0345 464 0079 or drop us an email.
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.
Will new mastic stop draughts?
Yes, where the draught is at the frame edge. We find where the air is coming from before we reseal.
Can I do it myself?
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.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Also in Upper Kingston
Common problems we fix in Upper Kingston
Every frame moves through the day. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the masonry beside it stays put. A sealant that cannot keep up eventually tears.
Most people get in touch after spotting one of these:
- Mastic that’s falling out in pieces
- Rain getting in at the frame or under the sill
- Sealant in the wrong colour for the frame
- Untidy mastic left by window fitters
Managing a site like Ringwood Junior School? Then its window and door frames need their mastic kept sound, just like a home’s.
Before you book anyone
- How much experience the applicator has
- How the surfaces are prepared before sealing
- What the quote includes, VAT included or not
- What product goes in the joint
Frames and glazing around Upper Kingston
With historic houses such as Avon Tyrrell House (about 2.6 miles south-east) nearby, there’s older building stock in the area around Upper Kingston 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 is traditional sand mastic. 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.
Homes close to Trinity Congregational Church include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in.
Upper Kingston is in Hampshire. Across the BH24 area, we cover window mastic for homes and businesses. We cover 683 towns and villages across Hampshire, large and small. You can also see our page for Southampton, roughly 18 miles from Upper Kingston.
Here we cover the BH24 postcode area for window mastic. If you’re just outside Upper Kingston, we cover Crow (1 mile east), Hightown (1 mile north-east), Bagnum (1 mile south-east), Ringwood (1 mile north) and Poulner (1 mile north). Further out, we also cover Totton (13 miles north-east), Lymington (11 miles south-east), New Milton (7 miles south-east), Barton on Sea (8 miles south-east), Marchwood (15 miles east) and Ashley (7 miles south-east).
Near you in Upper Kingston
Typical jobs here are in homes near Ringwood School and The Elm Tree Inn. Well-known places in the area include St Leonard's Hospital (3.8 miles west). Open spaces near Upper Kingston include Blashford Lakes and Linbrook Lake.
What happens on the day
We keep the work tidy and contained to the area we’re working on, so you can carry on as normal. Expect the work to take a few hours for a few frames, or a day or more for a whole house, and we explain the cure time before we leave. Somewhere as small as Upper Kingston, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
How to prepare
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
- Let us know if you’ve seen damp or leaks
Getting a quote
Every job is quoted individually. Simply call 0345 464 0079 or drop us an email and describe the job and send pictures if you have them.
Related advice
Landlord and commercial work in Upper Kingston
Landlords and letting agents in Upper Kingston can book us as well as householders. Sealant work between tenants keeps a property looking cared for.
For anyone letting property in or around Upper Kingston, several properties can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
Aftercare tips
How long the joints last depends on use and care. We suggest:
- Make sure the drainage slots are not blocked
- Wash the frames with mild soapy water
- Don’t paint over the silicone
- Avoid blasting the frames with a pressure washer
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
What sealant work can’t fix
New sealant cannot fix everything, and we’ll tell you before work begins. It will not solve:
- Damp problems in the wall away from the window
- Worn gaskets, brush seals or a door that has dropped
- Faulty window hardware
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- uPVC windows
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- Window sills
- Composite doors
Why act early in Upper Kingston
Failed mastic isn’t a reason to replace sound windows. Where the frames are sound, new mastic usually deals with draughts and leaks at the edges. If we find failed glass units or worn seals, we will tell you. Around Upper Kingston, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or email us and we will talk you through it.
Why Upper Kingston clients choose us
- White, clear, grey or another colour, product permitting
- We agree the colour with you first
- Rated 4.9 stars on Google
- More than 20 years in sealant work
See our cost guide or what customers say.