Kent · England
South Green Window Mastic
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in South Green. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps where the sill meets the wall
- Cold air getting in at the frame edge
- Hard, cracked sealant around windows
Window mastic in South Green, done properly
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. We work on aluminium frames, composite doors and window sills, and common reasons people get in touch are cracked or shrunken mastic around the frame and gaps where the sill meets the wall.
Mastic can only go onto a dry, clean joint, so window work in South Green is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
You get a 12-month guarantee, the same in South Green as everywhere else we work.
- Where
- South Green (ME9)
- Wider area
- Kent
- Cover
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Windows and doors in South Green
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Leeds Castle (about 4.4 miles south) are a reminder that the area around South Green has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Homes close to St Mary Magdalene Church include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you let a flat or house near Newington station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
South Green is about 4 miles south-west of Sittingbourne, in Kent. Jobs in South Green get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Across Kent, we cover 922 places, South Green among them. Our Chelmsford page covers work nearby, about 30 miles away.
Work in ME9 is quoted and booked the same way as anywhere else. Nearby, we also carry out window mastic in Stockbury (1 mile north-west), Oad Street (2 miles north-east), Silver Street (2 miles east), Bredgar (2 miles east) and Danaway (2 miles north-east). Larger places within reach include Maidstone (6 miles south-west), Ashford (15 miles south-east), Sittingbourne (4 miles north-east), Gravesend (14 miles north-west), Faversham (10 miles east) and Minster (10 miles north-east).
Around South Green
Locally, jobs take us to homes and businesses close to Stockbury Hill Wood and The Three Squirrels pub. The nearest railway station is Newington station, about 3 miles north. Other landmarks nearby include Leeds Castle (4.4 miles south) and KIMS hospital (4.5 miles west). Not far away are Detling Hill.
What happens on the day
At the end, we look at the finished work together. The work normally takes a morning for a couple of windows and a door, depending on the size of the job. Somewhere like South Green 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 confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Mention if the joints have been sealed before
- Mention any sign-in or site rules at work premises
- Keep children and pets away from the work area
Getting a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or email us.
Related advice
How the job changes by surface
Composite doors
Draughts round the door leaf usually come from worn seals or adjustment, not the mastic. We will tell you if that’s what we find.
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. Most leaks start at the bottom corners, so they get particular care.
Quotes for window mastic in South Green
Your quote is based on your job. We take into account:
- Working hours on commercial sites
- How easy the joints are to reach
- Which sealant suits the joint
- Mould in or behind the old joints
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
Helping us quote
Photos by email are helpful but not essential. Please mention:
- Whether it’s a home or a business
- Whether it has been sealed before
- How we’d reach the joints
- The problem you’ve noticed
Every job is quoted individually, so the first step is telling us about yours. Just call 0345 464 0079 or send us an email with the details and send photos if you have them.
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Walk round the house once a year and look at the joints
- Clear any debris from frame drain holes
- Clean frames with a soft cloth and soapy water
- Repaint timber before it’s bare
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
South Green: your questions answered
Is South Green in your area for window mastic?
Yes, South Green is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing.
Can you help a landlord with a rental near Newington station?
Yes. We work for landlords and letting agents as well as householders. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Can new window sealant be painted?
It depends on the sealant. Some hybrid sealants can be painted; silicone can’t. Mention any painting plans before we start.
Are you an approved applicator?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
How long does it take to reseal the windows on a house?
Allow anything from an hour or two to a full day, depending on how many frames there are. Access and how stubborn the old mastic is affect the time most.
Do you seal inside as well as outside?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We can do either or both.
How do I get a quote for window mastic in South Green?
It depends on the job, so we quote each one individually. To get one, ring 0345 464 0079 or send us an email with a short description of the job.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Can I do it myself?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Leave it or put it right?
Redecorating is a good moment to renew the mastic. Fresh joints finish the job neatly. In a small place like South Green, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Combining jobs into one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We’ll send you a clear quote for the lot.
Why South Green clients choose us
- White, clear, grey or another colour, product permitting
- Old sealant always removed completely
- One-year guarantee on every job
- Quality sealants from Arbo and Everbuild
See what affects the cost and customer reviews.
What we can’t put right
A few problems are outside what sealant work can do:
- A frame that has rotted at the joint
- Draughts through the window seals rather than the frame
- Misting between the panes of a double-glazed unit (that needs a new unit)
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Where we work in South Green
- Patio & French doors
- Window sills
- Composite doors
- uPVC windows
- Timber windows & doors
- Aluminium frames