Hampshire · England
Window Mastic in South Harting
Professional window mastic in and around South Harting, with every bit of old sealant taken out first and a 12-month guarantee.
- Old mastic that has gone black or come away
- Cracked sealant at the sill ends
- Cracked or shrunken mastic around the frame
Window mastic in South Harting, done properly
Homes in South Harting have every kind of window: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. We are often asked to deal with hard, cracked sealant around windows and untidy mastic left by window fitters, on patio & French doors, composite doors and uPVC windows.
In a village or hamlet like South Harting, 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.
Your job is guaranteed for a year, as with all our work.
- Place
- South Harting (GU31)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Landlords, agents and businesses in South Harting
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
We also work for property managers and facilities teams. We can quote a run of properties together.
Nearby places to South Harting
Other services in South Harting
The process
There is not much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes most of a day for a typical house, less for a few frames from start to finish. Somewhere as small as South Harting, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- Tell us about any water getting in
- Mention any sign-in or site rules at work premises
- Keep children and pets away from the work area
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, call 0345 464 0079 or send us an email.
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FAQs for South Harting
Do you cover smaller places like South Harting?
Yes, we do. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you cover South Harting for window mastic?
Yes. We work across London and the South East, and South Harting is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear price.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll explain our choice.
Can I paint over the new sealant?
That depends on the product. Silicone isn’t paintable, but some hybrid sealants are. Tell us if you are decorating and we will choose accordingly.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
Do you guarantee window mastic?
Yes, with our 12-month guarantee. Keeping drainage clear and checking the joints yearly helps them last.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint before we leave.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Paint up to the joint, not over it
- Avoid blasting the frames with a pressure washer
- Air rooms to keep condensation down around windows
- Clear any debris from frame drain holes
Try not to touch the new joint while it cures, following the cure time we give you. Don’t point a pressure washer at the joints.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. Resealing closes it.
How we quote for window mastic
Every job gets its own quote. This is what makes a difference:
- Any working-time requirements on site
- Any mould that needs treating
- How many rooms, windows or areas are involved
- The size of the job
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
Asking for a quote
Photos by email are helpful but not essential. Try to tell us:
- The problem you’ve noticed
- Any access issues, like height or stairs
- The address or postcode of the job
- Photos by email, if that’s easy
Every job is quoted individually, so the first step is telling us about yours. Simply phone 0345 464 0079 or email us and describe the job and send pictures if you have them.
What the job involves on each surface
Composite doors
Front doors take the weather head on. Those corners get the most care.
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.
Windows and doors in South Harting
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. With historic houses such as Uppark (about 1.2 miles south-west) nearby, there’s older building stock in the area around South Harting as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
In the older streets around The Parish Church of St Mary & St Gabriel, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Rented homes near Petersfield station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
South Harting is about 3 miles south-east of Petersfield, in Hampshire. For window mastic in and around South Harting, it’s easy to get a quote: please call 0345 464 0079 or drop us an email. We’re based in Crawley and cover Hampshire. South Harting is one of 683 towns and villages in Hampshire where we work. You can also see our page for Portsmouth, roughly 14 miles from South Harting.
Every address in GU31 is within our area for window mastic. You will find streets such as The Square, Smithfield and Mill Lane. We also cover East Harting (1 mile east), Nyewood (2 miles north-east), Elsted (2 miles east), Compton (3 miles south) and Dumpford (3 miles north-east). Further out, we also cover Havant (9 miles south-west), Horndean (7 miles south-west), Alton (13 miles north), Waterlooville (9 miles south-west), Petersfield (3 miles north-west) and Purbrook (10 miles south-west).
What’s near South Harting
In South Harting, that means homes and buildings near The Ship Inn and the streets around them. South Harting’s nearest station is Petersfield station, about 3.7 miles north-west. A little further out are Bear Museum (3.3 miles north-west) and Petersfield Community Hospital (3.6 miles north-west). Not far away are Iping and Stedham Commons and Oakham Hill.
When something else is needed
In fairness, some problems need a different trade:
- Broken hinges, locks or handles
- Rotten timber, which needs a joiner first
- Condensation trapped between the panes
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Where we work in South Harting
- uPVC windows
- Aluminium frames
- Patio & French doors
- Window sills
- Timber windows & doors
- Composite doors
What we’re called out for in South Harting
Water runs down the glass onto the sill, and the ends of the sill, where it meets the wall, are where it gets in. Failed sealant there lets rain into the wall or behind the frame.
These are the problems we’re asked about most:
- Untidy mastic left by window fitters
- Rain getting in at the frame or under the sill
- Whistling draughts around closed windows
- Gaps between the frame and the inside reveal
If you look after a building such as Harting CofE Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Before booking anyone
- What preparation is included
- What happens if they find a problem under the old sealant
- Whether they seal over old material or remove it
- Whether they’re fully insured