Kent · England
Stone Street Window Mastic
Our applicators work in Stone Street on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Cracked or shrunken mastic around the frame
- Draughty joints inside around the window
- Damp patches on the reveal after heavy rain
Common questions in Stone Street
Can you help a landlord with a rental near Kemsing station?
Yes. We work for landlords and letting agents as well as householders, and several properties can go on one quote. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Is Stone Street in your area for window mastic?
Yes. Our work covers London and the South East, and Stone Street is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
Will the old sealant be removed?
Always. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can you do several jobs on one visit?
Yes. Just list everything you need.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. Then call 0345 464 0079 or send us an email.
Should I try DIY first?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
What does window mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or email us and tell us what needs doing and where.
Do you guarantee window mastic?
Yes. Each job is covered for 12 months, inside or out.
Window mastic in Stone Street
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. We seal one or both, depending on what’s needed. Common call-outs are for old mastic that has gone black or come away and water coming in at the bottom corners of a door, on aluminium frames, patio & French doors and timber windows & doors.
Homes in small places like Stone 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.
Every job is covered by a one-year guarantee.
- Place
- Stone Street (TN15)
- Wider area
- Kent
- Cover
- One year on every job
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
There is not much for you to do on the day. Show us the job and we will take it from there. The job generally takes anything from an hour or two to a full day, depending on how many frames there are from start to finish. In a small place like Stone Street, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- Frame and wall are cleaned and must be dry before sealing.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Move anything stored near the joints
- Let us know about parking restrictions
- Try not to wet indoor joints just before the visit
Get a quote
Every job is quoted individually, so start by telling us what you need. Just ring 0345 464 0079 or email us with the details, and pictures are welcome.
Read more
Nearby places to Stone Street
Also in Stone Street
DIY sealant or a professional job?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
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.
Landlords, agents and businesses in Stone Street
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
How the job changes by surface
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. We cut it out, back any deep gaps and reseal properly.
Window sills
Every drop off the glass ends up on the sill, so the sill ends and the joint under the frame are vital. Each is cleaned out and resealed.
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Make sure the drainage slots aren’t blocked
- Use gentle cleaners on frames and sealant
- Wipe condensation off the frames
- Keep paint and stain on wooden frames in good order
On timber frames, keep the paintwork in good order, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
Water gets in quietly when mastic fails. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
Why it’s worth doing now in Stone Street
Draughts and leaks do not always mean new windows. Where the frames are sound, new mastic generally deals with draughts and leaks at the edges. If we find failed glass units or worn seals, we’ll tell you. In a small place like Stone Street, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and agree the price before starting.
Why book with us
- One-year guarantee on every job
- Full insurance on every job
- Anti-fungal sanitary silicone in wet areas
- More than 20 years in sealant work
See our cost guide or what customers say.
Frames and glazing around Stone Street
Historic houses like Ightham Mote (about 1.1 miles south-east) are a reminder that the area around Stone 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’s traditional sand mastic. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as St Lawrence Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages. If you live in an older home near St Lawrence, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Rented homes near Kemsing station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Stone Street is about 3 miles east of Sevenoaks, in Kent. Our applicators cover window mastic for householders, landlords and businesses in Stone Street and nearby, as part of our work across Kent. Stone Street is one of 922 towns and villages in Kent we cover. London is on our list too, around 22 miles away.
We cover every part of TN15 for window mastic and the streets around it. Local streets include Church Road, Stone Street Road and Pond Lane, all of which we cover. Nearby, we also carry out window mastic in Bitchet Green (1 mile south-west), Ivy Hatch (1 mile east), Styants Bottom (1 mile north), Godden Green (1 mile west) and Ightham (1 mile north-east). Further out, we also cover Maidstone (12 miles east), Dartford (12 miles north), Sevenoaks (3 miles west), Royal Tunbridge Wells (9 miles south), Gravesend (12 miles north-east) and Tonbridge (5 miles south).
Landmarks near Stone Street
In Stone Street, that means homes and buildings near Sevenoaks Preparatory School, Ivy Hatch Nature Reserve and The Plough pub, among other places. For rail, the closest station is Kemsing station, roughly 1.9 miles north. A little further out are Ightham Court (2.2 miles north-east) and Sevenoaks Hospital (2.8 miles north-west). The countryside around Stone Street includes Dryhill Nature Reserve.
What affects the cost of window mastic
Jobs vary more than people expect. What affects the quote:
- The type of sealant required
- How easy the joints are to reach
- The size of the job
- How many areas need sealing
Combining jobs into one visit usually makes better use of the time than several visits. You will get one clear quote for the whole job.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- If it’s domestic, commercial or a hotel
- Photos by email, if that’s easy
- What’s wrong with the joints now
- Roughly how big the job is
Want a quote for window mastic? Please ring 0345 464 0079 or send us an email and tell us about the job. We will explain what we’d do and give you a clear quote before work begins.