Kent · England
Window & door mastic in South Street, Kent
Specialist window mastic for South Street: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Cracked or shrunken mastic around the frame
- Whistling draughts around closed windows
- Cracked internal joints between frame and plaster
About our window mastic in South Street
A cold draught around a closed window often comes from the frame edge. A new joint stops the air getting through and quietens the whistle on windy days. Where the air is getting in through the window itself, we’ll say so. If you’re dealing with mastic that has split away from the wall and damp patches on the reveal after heavy rain, we can put it right, on timber windows & doors, uPVC windows and aluminium frames alike.
Homes in small places like South Street often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
Our work is backed for twelve months, in South Street and everywhere else we cover.
- Where
- South Street (DA13)
- Region
- Kent
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What the job involves on each surface
uPVC windows
The frame is cleaned with a product that will not harm the plastic, then the sealant goes in between frame and wall.
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. Each is cleaned, backed where deep and resealed.
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Landlord and commercial work in South Street
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we’re fully insured.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
FAQs for South Street
Can you do window mastic in South Street?
Yes. Our work covers London and the South East, and South Street is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear quote.
Do you cover smaller places like South Street?
Yes, South Street is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Is the work guaranteed?
Yes. Our one-year guarantee covers every job.
Can new window sealant be painted?
Not if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
How many windows can you do in a day?
It depends on access, the old mastic and the size of the frames. You will know the timing when we quote.
What we do, step by step
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes most of a day for a typical house, less for a few frames, including the tidy-up. In a small place like South Street, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- Deep gaps are filled with backing rod to set the depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- We clear up and check every joint is fully closed.
Before we arrive
- On commercial sites, let us know about site rules
- Let us know if you’ve seen damp or leaks
- Keep children and pets away from the work area
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
Honest limits
In fairness, some problems need a different trade:
- Broken hinges, locks or handles
- Damp coming through the wall itself rather than the frame joint
- Misting between the panes of a double-glazed unit (that needs a new unit)
If you’re not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer before you book.
What we seal
- Aluminium frames
- Timber windows & doors
- Composite doors
- Patio & French doors
- uPVC windows
- Window sills
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Air rooms to keep condensation down around windows
- Avoid harsh chemicals near the mastic
- Clear any debris from frame drain holes
- Keep timber frames painted
Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.
A failed joint lets water into the wall a little at a time. You might not see it until plaster blows or a damp patch appears inside. Early resealing stops it reaching that point.
South Street homes and the weather
With historic houses such as Cobham College (about 3.3 miles north-east) nearby, there’s older building stock in the area around South Street 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Letting a property close to Meopham station? Then renewing tired window mastic between tenants heads off draught and damp complaints. Schools such as Culverstone Green Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. Cobham College, about 3.3 miles north-east, is one of the historic houses in the wider area around South Street, and older homes nearby need a sealant that suits their walls.
South Street is about 6 miles south of Gravesend, in Kent. Our applicators cover window mastic for householders, landlords and businesses in South Street, as part of our work across Kent. Across Kent, we cover 922 places, South Street among them. We also work in London, about 22 miles from South Street.
We work across the DA13 postcode area for window mastic and the streets around it. Whether your property is on South Street and Chapman's Hill or a nearby road, our applicators can take on the job. We also cover the places around South Street: New Street (1 mile west), Priestwood Green (1 mile east), Culverstone Green (1 mile south), Harvel (1 mile south-east) and Priestwood (1 mile east). Larger places within reach include Maidstone (10 miles south-east), Dartford (8 miles north-west), Sevenoaks (9 miles south-west), Royal Tunbridge Wells (15 miles south), Gravesend (6 miles north) and Tonbridge (11 miles south).
Near you in South Street
We work in homes and buildings around Trosley Country Park and Meopham School, among other places. The nearest railway station is Meopham station, roughly 2.4 miles north. A little further out are Leybourne Castle (4.5 miles south-east) and Coldrum Long Barrow (2.3 miles south-east).
Why it’s worth doing now in South Street
The work is quick compared with the damage it prevents: it takes anything from an hour or two to a full day, depending on how many frames there are. Leave it until water is coming in and you may need plastering and decorating as well. In a small place like South Street, 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 normally makes better use of the time than several visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Why choose Mr Mastic in South Street
- Anti-fungal sanitary silicone in wet areas
- We agree the colour with you first
- Domestic, commercial and hotel work
- Rated 4.9 stars on Google
Take a look at what affects the cost and our reviews.