Kent · England
Deerton Street Window Mastic
Window mastic for Deerton Street, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cold air getting in at the frame edge
- Gaps between the frame and the inside reveal
- Mastic that has split away from the wall
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Window mastic for homes and businesses in Deerton Street
Every window and door frame has a gap around it, and mastic is what closes it. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. We work on patio & French doors, timber windows & doors and composite doors, and people most often call us about old mastic that has gone black or come away and gaps where the sill meets the wall.
Homes in small places like Deerton 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.
All our work comes with a 12-month guarantee.
- Where
- Deerton Street (ME9)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Deerton Street
What else we do in Deerton Street
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Clear any debris from frame drain holes
- Do not use solvent cleaners on the joint
- Check the mastic once a year
- Clean frames with a soft cloth and soapy water
Check the drainage slots in the frames aren’t blocked, so rain drains out rather than building up at the sealant.
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.
For landlords and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
Why act early in Deerton Street
A quick bead over the top of old mastic looks like an easy fix, but new sealant cannot bond to old, crumbling mastic. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. Where a wall is exposed, as many are in small places like Deerton Street, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Why us?
- A sealant colour to suit the surroundings
- Approved under the ARBOMaster scheme
- You choose the colour before work begins
- Fully insured
Take a look at how sealant jobs are priced or what customers say.
How the visit works
The work is kept neat and contained to the joints we’re treating, so you can carry on as normal. Expect the work to take a few hours for a few frames, or a day or more for a whole house, and we tell you how long to leave it before we go. In a small place like Deerton Street, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we look at every frame and agree the list.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Mention if the joints have been sealed before
- Try not to wet indoor joints just before the visit
- Mention any tricky access
Get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved.
Related advice
Windows and doors in Deerton Street
Deerton Street is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Historic houses like Belmont House and Gardens (about 4.1 miles south) are a reminder that the area around Deerton 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.
Letting a property close to Teynham station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. For site and facilities teams at buildings such as Teynham Parochial Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Homes close to Church of St Mary include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Deerton Street is about 3 miles west of Faversham, in Kent. For window mastic in and around Deerton Street, please ring 0345 464 0079 or send us an email for a quick quote. We are based in Crawley and cover Kent, Deerton Street included. We cover 922 towns and villages across Kent, from the larger towns to small villages. You can also see our page for Chelmsford, about 32 miles away.
We cover every part of ME9 for window mastic and the streets around it. Streets in the area include Deerton Street and Lower Road, all of which we cover. Close by, we work in Norton Ash (1 mile south), Teynham Street (1 mile north), Lewson Street (1 mile south-west), Teynham (1 mile west) and Four Oaks (1 mile south-east). Further out, we also cover Maidstone (14 miles west), Ashford (13 miles south), Canterbury (11 miles east), Sittingbourne (4 miles west), Whitstable (9 miles east) and Faversham (3 miles east).
Around Deerton Street
Deerton Street’s nearest station is Teynham station, roughly 1 mile west. Other landmarks nearby include Newnham Castle (3.3 miles south) and Sittingbourne Heritage Museum (3.8 miles west).
When it is not the sealant
Before you book, it’s worth knowing the limits:
- Damp problems in the wall away from the window
- A failed sealed unit that has misted up
- Broken hinges, locks or handles
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Aluminium frames
- Timber windows & doors
- uPVC windows
- Composite doors
- Patio & French doors
- Window sills
Common questions in Deerton Street
I let a flat near Teynham station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Do you cover smaller places like Deerton Street?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do I have to be there?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Do you seal inside as well as outside?
Yes. Draughts often come through the inside gap too, so it can be worth sealing both.
Do the sealants smell?
It depends on the product. Some products have a noticeable smell, others very little.
How many windows can you do in a day?
A few frames take a few hours, while a whole house takes longer. We confirm the timing with your quote.
Will you leave a mess?
Tidy work is part of the job. Nearby surfaces are protected.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint.
Different surfaces, different methods
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.
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so we use a flexible, low-modulus sealant. We match white, brown, anthracite grey and black frames.