Kent · England
Window & door mastic in Green Street Green, Kent
Professional window mastic in and around Green Street Green, with every bit of old sealant taken out first and a 12-month guarantee.
- Black, perished sealant on frames
- Rushed sealant from a window installation
- Gaps between the frame and the inside reveal
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Do not paint over the silicone
- Look round the frames every year or so
- Avoid blasting the frames with a pressure washer
- Use gentle cleaners on frames and sealant
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
How we handle window mastic in Green Street Green
The new joint does not have to be white. We can seal in white, brown, anthracite grey, black or clear, so the bead blends with the window rather than framing it. We work on composite doors, timber windows & doors and patio & French doors, and people most often call us about sealant in the wrong colour for the frame and whistling draughts around closed windows.
Homes in small places like Green Street Green 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 Green Street Green and everywhere else we cover.
- Where
- Green Street Green (DA2)
- Region
- Kent
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work can’t fix
Sealant isn’t the answer to every problem, and we’d rather say so up front. It won’t solve:
- Penetrating damp from a failed cavity tray or render
- Soft or decayed wood in the frame
- Condensation trapped between the panes
Not sure which it is? You can call 0345 464 0079 or send us an email and we will tell you honestly.
Where we work in Green Street Green
- uPVC windows
- Composite doors
- Patio & French doors
- Window sills
- Timber windows & doors
- Aluminium frames
Quotes for window mastic in Green Street Green
The price is agreed before any work begins. It takes into account:
- Access and height
- How many areas need sealing
- The size of the job
- Whether old sealant or filler has to be cut out
Combining jobs into one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. We’ll send you a clear quote for the lot.
What we need to know
You do not need to know the technical terms. It helps if you can tell us:
- The rough size of the job
- If someone has resealed it before
- Where the job is, and your postcode
- The problem you’ve noticed
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we’ll talk you through the work.
What we do, step by step
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a few frames, or a day or more for a whole house. Somewhere as small as Green Street Green, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any water getting in
- Mention any sign-in or site rules at work premises
Get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Read more
Also near Green Street Green
Also in Green Street Green
Window mastic in Green Street Green: local notes
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Longfield station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Green Street Green is about 3 miles south-east of Dartford, in Kent. Green Street Green gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Green Street Green is one of 922 places in Kent we cover for window mastic. For nearby work, see our London page (17 miles or so).
Every address in DA2 is within our area for window mastic. Other places close to Green Street Green include Grubb Street (1 mile south), Westwood (1 mile east), St Margarets (1 mile west), Bean (1 mile north) and Darenth (1 mile north-west). Larger places within reach include Maidstone (15 miles south-east), Dartford (3 miles north-west), Sevenoaks (10 miles south-west), Gravesend (5 miles east), Tonbridge (15 miles south) and Northfleet (3 miles north-east).
What’s near Green Street Green
Typical jobs here are in homes near Beacon Wood Country Park, Longfield Academy and The Black Horse pub, among other places. The closest station to Green Street Green is Longfield station, roughly 1.5 miles south-east of the centre. Other landmarks nearby include Bluewater (1.8 miles north) and Stone Castle (2.1 miles north). The countryside around Green Street Green includes Wansunt Pit and Sawyers Lake.
Your questions about window mastic in Green Street Green
Can you do window mastic in Green Street Green?
Yes. We work across London and the South East, and Green Street Green is part of that. Just call 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
Can you help a landlord with a rental near Longfield station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Can I add another job to the visit?
Of course. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
Can you reach windows above the ground floor?
Yes, if safe access is possible. Higher or awkward frames may need extra access, and we will confirm what’s needed.
Do I need to be at home?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
How much does window mastic cost in Green Street Green?
Size, access and the old material all affect the cost. Call for a quick quote.
Common problems we fix in Green Street Green
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar never bonded as it should, and it lets go sooner than it should.
These are the problems we are asked about most:
- Gaps left after new windows were fitted
- Old mastic that has gone black or come away
- Water coming in at the bottom corners of a door
- Gaps between the frame and the inside reveal
Managing a site like Greenlands Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Before booking anyone
- Who turns up on the day
- What the cure time is
- How the colour is chosen
- How long the guarantee is
Landlords, agents and businesses in Green Street Green
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We work for landlords and letting agents as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.