Kent · England
Window Mastic in Dean Street
Mastic around window and door frames, sills and patio doors for Dean Street, backed by a 12-month guarantee. Ask us for a quote.
- Leaking joints at the ends of sills
- A bead that does not match the frame
- Gaps between the frame and the inside reveal
Window mastic in Dean Street, done properly
A window frame and the wall around it expand and shrink at different rates. Heat and cold make frames grow and shrink against brick or render that hardly moves. So the sealant has to stretch and recover, which is why we use a low-modulus product. We’re often asked to deal with cold air getting in at the frame edge and mastic that has split away from the wall, on timber windows & doors, composite doors and aluminium frames.
Mastic can only go onto a dry, clean joint, so window work in Dean Street is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
The work is covered for a year after we finish. If anything isn’t right with it, call 0345 464 0079 or drop us an email.
- Place
- Dean Street (ME15)
- Region
- Kent
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
For landlords and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
Dean Street: your questions answered
Is Dean Street within the area you cover?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near East Farleigh station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just call 0345 464 0079 or email us with the address and what needs doing, and we will send you a clear quote.
Will you leave a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Do you have insurance?
Yes. We are fully insured.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
What does window mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before any work starts.
Can you get sealant to suit coloured frames?
Generally, yes. Tell us the frame colour when you get in touch and we’ll match it as closely as we can.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
Places near Dean Street
Also in Dean Street
Signs you need window mastic in Dean Street
Sun, frost and rain wear sealant out. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
Common reasons people contact us are:
- Rushed sealant from a window installation
- Sealant in the wrong colour for the frame
- Black, perished sealant on frames
- Whistling draughts around closed windows
In the older streets around Church of Saint Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before you book
- Which colour the sealant will be
- When the joint can take water or movement
- What preparation is included
- What the quote includes, VAT included or not
What the job involves on each surface
uPVC windows
uPVC expands and contracts noticeably with temperature, so the joint needs a low-modulus sealant that stays flexible. White is the usual colour, with brown, anthracite grey and black for coloured frames.
Window sills
Sills catch the water running down the glass, so the sill ends and the joint under the frame are vital. They’re cut out and resealed with exterior sealant.
Leave it or put it right?
If you are painting or rendering, reseal at the same time. Fresh joints finish the job neatly. Older cottages and farmhouses around Dean Street can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Why us?
- We leave the area clean and tidy
- A sealant colour to suit the surroundings
- More than 20 years in sealant work
- A 12-month guarantee on all work
Read our cost guide and what customers say.
Windows and doors in Dean Street
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Stoneacre (about 3.5 miles east) nearby, there’s older building stock in the area around Dean Street 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.
Managing a site like East Farleigh Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near East Farleigh station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Dean Street is about 2 miles south-west of Maidstone, in Kent. For window mastic in and around Dean Street, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We’re based in Crawley and cover Kent, Dean Street included. Dean Street is one of 922 places in Kent we cover for window mastic. For nearby work, see our London page, about 31 miles away.
Work in ME15 is quoted and booked the same way as anywhere else. Whether your property is on Forge Lane and Dean Street or a nearby road, our applicators can take on the job. Other places close to Dean Street include East Farleigh (1 mile west), Coxheath (1 mile south), Fant (1 mile north), Kettle Corner (1 mile west) and Farleigh Green (1 mile west). Within a short drive, we also cover Sittingbourne (12 miles north-east), Sevenoaks (14 miles west), Royal Tunbridge Wells (13 miles south-west), Gravesend (13 miles north), Tonbridge (10 miles west) and Northfleet (14 miles north-west).
Around Dean Street
Around Dean Street, our work takes us to homes and buildings near Walnut Tree pub, St Augustine Academy and Quarry Wood, among other places. The closest station to Dean Street is East Farleigh station, about 0.6 miles north-west of the centre. Nearby you will also find Allington Castle (3 miles north) and Fremlin Walk (2 miles north-east). Not far away are Boxley Hills.
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Keep timber frames painted
- Avoid harsh chemicals near the mastic
- Keep jet washers away from the mastic
- Paint up to the joint, not over it
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
Signs to watch for: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
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 getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
How it works
There isn’t much for you to do on the day. Show us the job and we will take it from there. The work itself takes anything from an hour or two to a full day, depending on how many frames there are, including the tidy-up. In a small place like Dean Street, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each frame and agree which ones need doing.
- 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.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Let us know if you’ve seen damp or leaks
- On commercial sites, let us know about site rules
Getting a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.