Hampshire · England
Soberton Window Mastic
Window mastic across Soberton and nearby, with old sealant always removed completely.
- Whistling draughts around closed windows
- Hard, cracked sealant around windows
- Cracked internal joints between frame and plaster
When it isn’t the sealant
We’ll always be straight with you, so here’s what new sealant will not do:
- Penetrating damp from a failed cavity tray or render
- Condensation trapped between the panes
- Soft or decayed wood in the frame
If you are not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Window sills
- Patio & French doors
- Composite doors
- uPVC windows
- Timber windows & doors
- Aluminium frames
Window mastic in Soberton, done properly
Frames and walls do not move together. Heat and cold make frames grow and shrink against brick or render that hardly moves. That’s why the joint needs a flexible, low-modulus sealant rather than something rigid. If you have gaps between the frame and the inside reveal and gaps where the sill meets the wall, we can help.
In a village or hamlet like Soberton, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
Our work is backed for twelve months.
- Where
- Soberton (SO32)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
When we arrive, we start by going over the job with you. We protect the surfaces around the joints before any work begins. The work normally takes anything from an hour or two to a full day, depending on how many frames there are. Somewhere like Soberton 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.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Mention any leaks or damp you’ve noticed
- Mention any parking rules near the property
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.
Advice
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Soberton questions
Is window mastic in Soberton guaranteed?
All our work, in Soberton and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Is Soberton in your area for window mastic?
Yes. Our work covers London and the South East, and Soberton is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. Then ring 0345 464 0079 or email us.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Do you work for landlords and businesses?
Yes. We work for householders, landlords, letting agents, businesses and hotels across Hampshire.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
How we quote for window mastic
Call for a quick quote. What matters most is:
- Mould in or behind the old joints
- How much old sealant there is and how hard it is to remove
- The number of rooms or windows
- The size of the job
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Helping us quote
There’s no need for technical detail. Just tell us:
- The address or postcode of the job
- Whether it has been sealed before
- How we’d reach the joints
- How many joints, rooms or windows are involved
Need a quote? Please call 0345 464 0079 or email us and tell us about the job. We’ll explain what we’d do and send you a clear quote before any work starts.
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
If you manage several properties in or around Soberton, several properties can be quoted together. Send us the addresses and the work at each.
Window mastic in Soberton: local notes
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you live in an older home near Church of St Peter, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Soberton is about 6 miles north-west of Horndean, in Hampshire. We carry out window mastic for homes and businesses in Soberton, as part of our work across Hampshire. Across Hampshire, we cover 683 places, and Soberton is one of them. We also work in Portsmouth, around 10 miles away.
All of SO32 is covered for window mastic. Whether your property is on High Street, Station Road and Long Road or anywhere close by, we can help. We also cover Droxford (1 mile north), Brockbridge (1 mile north), Soberton Heath (2 miles south), Hill Grove (2 miles west) and Southend (2 miles south). We also work in nearby towns such as Winchester (11 miles north-west), Gosport (10 miles south), Havant (9 miles south-east), Eastleigh (9 miles west), Fareham (7 miles south-west) and Horndean (6 miles south-east).
Around Soberton
We work in homes and buildings around White Lion Inn and the streets around them. A little further out are Knowle Hospital (5.4 miles south-west) and Bishop's Waltham Museum (3.7 miles west). The countryside around Soberton includes Beacon Hill and St Clair's Meadow.
Nearby places to Soberton
Also in Soberton
How the job changes by surface
Patio & French doors
Heavy door frames can move more than windows. The sealant must cope with it.
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. We cut it out, back any deep gaps and reseal properly.
Signs you need window mastic in Soberton
Joints that are too thin or too deep fail early. A skim of sealant over a wide gap soon tears, and a gap filled solid cannot flex. Backing rod sets the right depth.
Look out for these signs:
- Cold air getting in at the frame edge
- White mastic on grey or black frames
- Untidy mastic left by window fitters
- Water coming in at the bottom corners of a door
Managing a site like Droxford Junior School? Then its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- Who does the work, and how experienced they are
- What preparation is included
- Whether they seal over old material or remove it
- Which sealant they’ll use, and why