Hampshire · England
South Hayling Window Mastic
Window and door frames in South Hayling need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Untidy mastic left by window fitters
- Cracked or shrunken mastic around the frame
- Old mastic that has gone black or come away
Window mastic in South Hayling, done properly
There are two joints on most windows. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. We work on composite doors, patio & French doors and uPVC windows, and common reasons people get in touch are draughts coming in around windows and doors and white mastic on grey or black frames.
Around South Hayling, conservatories, garden rooms and patio doors are often part of the house. Their glazing joints and frame seals are as much a part of the job as the windows.
Your job is guaranteed for a year, as with all our work.
- Place
- South Hayling (PO11)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work can’t fix
To be straight with you, some problems need a different trade:
- Damp problems in the wall away from the window
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Soft or decayed wood in the frame
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before you book.
Joints and surfaces we work on
- Aluminium frames
- Patio & French doors
- Timber windows & doors
- Window sills
- uPVC windows
- Composite doors
How the job changes by surface
Patio & French doors
Door frames take knocks and movement every time the doors are used. A flexible sealant copes with that.
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A tidy bead in anthracite grey, black or a matching colour keeps the clean look.
Landlord and commercial work in South Hayling
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll quote.
Aftercare tips
Looking after new joints is easy, and it makes a real difference:
- Do not use solvent cleaners on the joint
- Repaint timber before it’s bare
- Clear any debris from frame drain holes
- Walk round the house once a year and look at the joints
On timber frames, keep the paintwork in good order, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
What affects the quote in South Hayling
The price is agreed before any work begins. It takes into account:
- Working hours on commercial sites
- Whether old sealant or filler has to be cut out
- The number of rooms or windows
- Access and height
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 and we will give you an honest view and a quote.
Helping us quote
Before you ask for a quote, have a think about:
- Pictures of the joints, sent by email
- What the problem is, such as mould, gaps, leaks or cracking
- If someone has resealed it before
- The address or postcode of the job
Getting a quote is simple: tell us what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we’ll take it from there.
Windows and doors in South Hayling
South Hayling is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around window and door frames, especially on the side facing the sea. Historic houses like Warblington Castle (about 3.9 miles north) are a reminder that the area around South Hayling has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Schools such as Mengham Junior School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. For landlords with property near Fratton station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. If you live in an older home near St Mary's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
South Hayling is about 5 miles east of Portsmouth, in Hampshire. Homes, rented property, offices and hotels in South Hayling can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Across Hampshire, we cover 683 places, and South Hayling is one of them.
All of PO11 is covered for window mastic, from the main roads to the quietest streets. If you need window mastic at a property on Church Road, Station Road and St Leonard's Avenue or a nearby road, our applicators can take on the job. We also cover the places around South Hayling: West Town (1 mile west), Tourner Bury (1 mile north-east), Tye (2 miles north), Stoke (2 miles north) and North Hayling (2 miles north). Larger places within reach include Gosport (8 miles west), Havant (5 miles north), Fareham (11 miles north-west), Horndean (8 miles north), Waterlooville (7 miles north) and Petersfield (15 miles north).
What’s near South Hayling
Typical jobs here are in homes near Newton House Hotel, The Hayling College and The Hayling College, among other places. The closest station to South Hayling is Fratton station, about 4.3 miles west. Other landmarks nearby include St James Hospital (3.3 miles west) and Eastney Beam Engine House (3.1 miles west). For a walk, there’s Hayling Billy.
How it works
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes anything from an hour or two to a full day, depending on how many frames there are. A visit to South Hayling is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Finally we tidy up and check each joint.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
How to get a quote
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or drop us an email with the details.
Read more
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South Hayling: your questions answered
Do you cover smaller places like South Hayling?
Yes. South Hayling is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Does the coastal weather in South Hayling affect outside sealant?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are generally the first to need attention.
Do you work on first-floor windows?
Yes, in most cases. Access is planned before any work starts, so mention the height and anything in the way.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator and we’re fully insured too.
Is the work guaranteed?
Yes. All our work carries a 12-month guarantee, and we’re fully insured.
How many windows can you do in a day?
That depends on the number of frames, how they’re reached and the state of the old mastic. We’ll tell you how long your job needs when we quote.
What does window mastic cost?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before any work starts.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Why act early in South Hayling
The work is quick compared with the damage it prevents: the visit takes anything from an hour or two to a full day, depending on how many frames there are. Wait for damp to appear and there may be plaster and decorating to sort out too. In a smaller place like South Hayling, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Why choose Mr Mastic in South Hayling
- Tidy, careful work
- Sanitary silicone with an anti-fungal additive in wet areas
- 180+ five-star Google reviews
- Every job guaranteed for a year
Read what affects the cost or customer reviews.