Kent · England
Window Mastic in Round Street
Specialist window mastic for Round Street: careful preparation, the right product and tidy work. Call for a quick quote.
- Old mastic that has gone black or come away
- White mastic on grey or black frames
- Rushed sealant from a window installation
Landlord and commercial work in Round Street
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
For anyone letting property in or around Round Street, several properties can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
Window mastic for homes and businesses in Round Street
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty. Where the air is getting in through the window itself, we’ll say so. We are often asked to deal with hard, cracked sealant around windows and gaps between the frame and the inside reveal, on timber windows & doors, window sills and composite doors.
Somewhere as small as Round Street, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
We stand behind the work with a one-year guarantee.
- Location
- Round Street (DA13)
- Region
- Kent
- Guarantee
- One year on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How the visit works
The work is kept neat and contained to the joints we’re treating. Expect the work to take a morning for a couple of windows and a door. Somewhere like Round Street needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- Where gaps are deep, backing rod goes in first.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- We clear up and check every joint is fully closed.
How to prepare
- Mention any leaks or damp you’ve noticed
- Tell us about any previous sealing or DIY attempts
- Try not to wet indoor joints just before the visit
Ask for a quote
To get a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Read more
How the job changes by surface
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.
Composite doors
Draughts round the door leaf generally come from worn seals or adjustment, not the mastic. We seal the frame and let you know about anything else.
What we’re called out for in Round Street
Mastic ages in the weather. Sunlight dries the surface out, and over the years it loses its give, cracks and comes away.
These are the problems we’re asked about most:
- Mastic that is falling out in pieces
- Gaps between the frame and the inside reveal
- Gaps left after new windows were fitted
- Mastic that has split away from the wall
For landlords with property near Sole Street station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Comparing quotes
- Whether they seal over old material or remove it
- Whether the sealant suits the joint
- How the surfaces are prepared before sealing
- Is VAT in the price?
When something else is needed
Sealant is not the answer to every problem, and we’d rather say so up front. It will not solve:
- A door that needs adjusting, rehanging or new seals
- Damp coming through the wall itself rather than the frame joint
- A failed sealed unit that has misted up
If you are not sure, just ring 0345 464 0079 or email us and we will give you a straight answer before you book.
Where we work in Round Street
- Patio & French doors
- Window sills
- uPVC windows
- Timber windows & doors
- Aluminium frames
- Composite doors
Your questions about window mastic in Round Street
Can you do window mastic in Round Street?
Yes, Round Street is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing.
Do you work for landlords with property near Sole Street station?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear price.
Are you fully insured?
Yes. We’re fully insured.
Do I have to be there?
That depends on where the joints are. Inside work needs someone to give us access.
Does the work come with a guarantee?
Yes. All our work carries a 12-month guarantee, and we are ARBOMaster approved applicators.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned.
What should I tell you?
A short description and the location. If we need more, we will ask.
What sealant do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Why deal with it now?
Resealing frames is a short job: it takes most of a day for a typical house, less for a few frames. Leave it until water is coming in and you may need plastering and decorating as well. In a small place like Round Street, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
Why choose Mr Mastic in Round Street
- Colour agreed with you before any work starts
- A sealant colour to suit the surroundings
- 180+ five-star Google reviews
- Every job guaranteed for a year
Take a look at how sealant jobs are priced and what customers say.
Frames and glazing around Round Street
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. Historic houses like Cobham College (about 0.9 miles east) are a reminder that the area around Round Street 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's Room include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Schools such as Cobham Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Round Street is about 3 miles south of Gravesend, in Kent. Across the DA13 area, we cover window mastic for homes and businesses. Round Street is one of 922 towns and villages in Kent we cover. Our London page covers work nearby, about 22 miles away.
We work across the DA13 postcode area for window mastic. We also cover the places around Round Street: Sole Street (1 mile south), Gold Street (1 mile south-east), Nash Street (1 mile west), Meopham (1 mile south-west) and Henley Street (1 mile south-east). Within a short drive, we also cover Maidstone (11 miles south-east), Dartford (8 miles north-west), Sevenoaks (11 miles south-west), Gravesend (3 miles north), Tonbridge (14 miles south) and Northfleet (3 miles north-west).
Around Round Street
Typical jobs here are in homes near The Railway Inn, Jeskyns and Meopham School, among other places. The closest station to Round Street is Sole Street station, roughly 0.6 miles south of the centre. A little further out are Gravesham Museum (3.5 miles north) and Gravesham Community Hospital (3.6 miles north). Not far away are Gad's Hill and Ranscombe Farm.
Looking after it afterwards
After the cure time, these simple habits help:
- Keep paint off silicone joints
- Walk round the house once a year and look at the joints
- Wipe condensation off the frames
- Keep solvents and bleach off the sealant
Check the drainage slots in the frames aren’t blocked, so water can run away instead of sitting against the joint.
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. Any of these is worth a call.