Kent · England
Window & door mastic in Stone, Kent
Problem with your window and door frames in Stone? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Rain getting in at the frame or under the sill
- Black, perished sealant on frames
- White mastic on grey or black frames
About our window mastic in Stone
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. Our applicators cut it out and replace it with a flexible, weatherproof sealant. We work on timber windows & doors, aluminium frames and patio & French doors, and people most often call us about water coming in at the bottom corners of a door and draughty joints inside around the window.
In a smaller place like Stone, some walls face open ground and catch the full force of the weather. That’s hard on the mastic around frames and sills.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Stone (DA9)
- Region
- Kent
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What window mastic looks like in Stone
With historic houses such as Hall Place and Gardens (about 4.8 miles west) nearby, there’s older building stock in the area around Stone as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Church of St Mary, the joint between an old wall and a newer frame is normally the first place rain gets in. For site and facilities teams at buildings such as Stone St Mary's CofE Primary School, larger buildings have plenty of frames, and the mastic around each one ages. For landlords with property near Stone Crossing station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Stone is about 2 miles east of Dartford, in Kent. We provide window mastic to homes and businesses in Stone and the surrounding area, as part of our work across Kent. Stone is one of 922 towns and villages in Kent we cover for window mastic. There’s also a page for London, about 16 miles away.
Jobs for window mastic in DA9 works the same way as everywhere else we cover. We cover properties on Church Road, Perkins Close and Richardson Close. Main roads around Stone include the A296, which makes travel easy. If you are just outside Stone, we cover Greenhithe (1 mile north-east), Swanscombe (1 mile east), Bean (2 miles south-east), Darenth (2 miles south) and Temple Hill (2 miles west). Further out, we also cover Sevenoaks (12 miles south), Gravesend (5 miles east), Northfleet (3 miles east), Swanley (5 miles south-west), Kings Hill (13 miles south-east) and Windmill Hill (4 miles east).
Landmarks near Stone
Around Stone, our work takes us to homes and buildings near Darenth Country Park, The White Hart Public House and Stone Lodge School. The nearest railway station is Stone Crossing station, about 0.5 miles north-west of the centre. Well-known places in the area include Stone Museum of Geology (1.3 miles west) and Darent Valley Hospital (1 mile south-west). Not far away are Chafford Gorges Nature Park and Sawyers Lake.
Work for landlords, hotels and businesses
For anyone letting property in or around Stone, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and pictures by email help.
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.
What sealant work can’t fix
Sealant is not the answer to every problem, and we will tell you before work begins. It won’t solve:
- A door that needs adjusting, rehanging or new seals
- A frame that has rotted at the joint
- Faulty window hardware
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Where we work in Stone
- Window sills
- Aluminium frames
- Timber windows & doors
- uPVC windows
- Composite doors
- Patio & French doors
How we quote for window mastic
Every job gets its own quote. This is what makes a difference:
- How much there is to do
- Working hours on commercial sites
- How much old sealant there is and how hard it is to remove
- The type of sealant required
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- Any previous sealing or DIY work
- How many joints, rooms or windows are involved
- Where the property is
- Access, such as stairs, a lift or height
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
Stone questions
Will you come out to Stone?
Yes, we do. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you do window mastic in Stone?
Yes. Our work covers London and the South East, and Stone is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job.
Is the work guaranteed?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
Can tenants book the work?
Yes, though it’s best to check with your landlord first. Landlords are often happy for the work to be arranged.
Where is Mr Mastic based?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.
Are you fully insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
What do you need from me for a quote?
A short description and the location, with photos by email if possible. If we need more, we’ll ask.
Can you do several jobs on one visit?
Yes. More than one area can go on one quote.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Paint up to the joint, not over it
- Walk round the house once a year and look at the joints
- Keep timber frames painted
- Clear any debris from frame drain holes
On timber frames, keep the paintwork in good order, since wood that gets wet swells and shrinks more. Paint up to the joint, not over the silicone.
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.
The process
At the end, we look at the finished work together and tell you how long to leave it. The visit itself generally takes a few hours for a few frames, or a day or more for a whole house, depending on how much there is to do. For a job in Stone, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Getting ready for the visit
- For business premises, tell us about site rules or sign-in
- Keep children and pets away from the work area
- Mention any leaks or damp you’ve noticed
How to get a quote
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved.
Advice
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Also near Stone
More services for Stone
Why it’s worth doing now in Stone
Draughts and leaks don’t always mean new windows. If the frames and glass are in good order, resealing the joints is often all that is needed. Problems with the glass or gaskets are for a window company, and we will say so. Homes in smaller places like Stone can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
The cost depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Why Stone customers choose us
- Sanitary silicone with an anti-fungal additive in wet areas
- More than 20 years in sealant work
- Quality sealants from Arbo and Everbuild
- Homes, businesses and hotels
Read our cost guide or our reviews.