Kent · England
Window & door mastic in Clement Street, Kent
Mastic around window and door frames, sills and patio doors in Clement Street, with a one-year guarantee on every job. Ask us for a quote.
- Gaps where the sill meets the wall
- Draughty joints inside around the window
- Sealant in the wrong colour for the frame
How to look after the new joints
After the cure time, these simple habits help:
- Air rooms to keep condensation down around windows
- Clean frames with a soft cloth and soapy water
- Repaint timber before it’s bare
- Keep solvents and bleach off the sealant
Silicone cannot usually be painted, so if you’re planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so it pays to reseal before that happens.
Window mastic in Clement Street
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. Either or both can be done. We work on uPVC windows, window sills and timber windows & doors, and common reasons people get in touch are rushed sealant from a window installation and mastic that’s falling out in pieces.
In a village or hamlet like Clement Street, 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.
Whatever the size of the job, you get the same 12-month guarantee.
- Location
- Clement Street (BR8)
- Region
- Kent
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Clement Street
Also in Clement Street
What we do, step by step
We bring everything the job needs with us, so you do not need to buy or prepare anything. Once we have agreed what’s being done, the area is protected and the work begins. It normally takes a few hours for a handful of frames, longer for a whole house. For a village or hamlet like Clement Street, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Let us know about earlier repairs to the joints
- Keep pets and children clear of the area while we work
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you’re ready, phone 0345 464 0079 or drop us an email.
Related advice
Common problems we fix in Clement Street
Timber windows bring their own problems. Mastic painted over many times cracks with the paint, and the wood moves with damp as well as heat.
Most people get in touch after spotting one of these:
- Water coming in at the bottom corners of a door
- Untidy mastic left by window fitters
- Cold air getting in at the frame edge
- Sealant in the wrong colour for the frame
For an older house near a landmark such as Church of Saint Paul, the joint between an old wall and a newer frame is normally the first place rain gets in.
Questions to ask before booking
- How long the guarantee is
- What preparation is included
- Which colour the sealant will be
- What insurance they hold
Windows and doors in Clement Street
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Hall Place and Gardens (about 3.3 miles north-west) are a reminder that the area around Clement Street has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For landlords with property near Farningham Road station, renewing tired window mastic between tenants heads off draught and damp complaints. Schools such as Sutton-At-Hone Church of England Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Clement Street is about 2 miles south of Dartford, in Kent. Anywhere in BR8, our applicators can take on window mastic. Our Kent coverage runs to 922 places, Clement Street among them. London is on our list too, about 14 miles from Clement Street.
Work in BR8 works the same way as everywhere else we cover. We also cover the places around Clement Street: Hawley (1 mile north-east), Sutton at Hone (1 mile east), South Darenth (2 miles south-east), Darenth (2 miles east) and St Margarets (2 miles east). Larger places within reach include Sevenoaks (9 miles south), Gravesend (7 miles east), Tonbridge (15 miles south), Northfleet (6 miles east), Kings Hill (13 miles south-east) and Swanscombe (4 miles north-east).
Local landmarks in Clement Street
Locally, jobs take us to homes and businesses close to Dartford Heath, Wilmington Academy and The Plough pub and the streets around them. The nearest railway station is Farningham Road station, roughly 1.3 miles south-east. Nearby you’ll also find Eynsford Castle (3 miles south) and West Hill Hospital (2.2 miles north). The countryside around Clement Street includes Wansunt Pit.
When it isn’t the sealant
A few problems are outside what sealant work can do:
- Broken hinges, locks or handles
- Worn gaskets, brush seals or a door that has dropped
- Condensation trapped between the panes
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Joints and surfaces we work on
- Window sills
- Timber windows & doors
- uPVC windows
- Aluminium frames
- Composite doors
- Patio & French doors
Your questions about window mastic in Clement Street
Is Clement Street in your area for window mastic?
Yes, Clement Street is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing.
Do you work for landlords with property near Farningham Road station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
Is it messy?
No. The area is protected while we work and cleaned up afterwards.
What does window mastic cost?
We don’t 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 will get a clear quote before any work starts.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Can you do upstairs windows?
Yes, as long as they can be reached safely. Tell us about access when you get in touch and we’ll plan for it.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we will tell you what we are using.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
Different surfaces, different methods
Patio & French doors
Not every patio door leak is a mastic problem: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We check before we reseal.
Window sills
Where a sill meets brick or render, the ends often crack first. We reseal them so rain can’t run into the wall.
Quotes for window mastic in Clement Street
We quote each job individually. These are the things that affect it:
- The number and length of the joints
- Whether old sealant or filler has to be cut out
- How many rooms, windows or areas are involved
- When we can work, for business premises
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first.
Helping us quote
What to tell us when you ask for a quote:
- Pictures of the joints, sent by email
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
- How many joints, rooms or windows are involved
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or email us and describe the job, and photos are welcome.
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.