Kent · England
Window Mastic in Stockbury
Our applicators work in Stockbury on mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly.
- Hard, cracked sealant around windows
- Water coming in at the bottom corners of a door
- Whistling draughts around closed windows
FAQs for Stockbury
Is Stockbury within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work for landlords with property near Newington station?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Can you do several jobs on one visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Can resealing stop a draught around my window?
Yes, where the draught is at the frame edge. We check where the draught is before any work starts.
How much does window mastic cost in Stockbury?
It depends on the job, so we quote each one individually. For a quick quote, call 0345 464 0079 or drop us an email and let us know what needs doing and where.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
Are you insured?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
When is the sealant fully cured?
Cure times vary by product and the temperature. We tell you how long to leave it before we go.
Window mastic for homes and businesses in Stockbury
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that cannot move properly, so deep gaps get backing rod first. That way the new bead bonds to the frame and the wall only. We’re often asked to deal with cracked internal joints between frame and plaster and sealant in the wrong colour for the frame, on aluminium frames, patio & French doors and uPVC windows.
Somewhere as small as Stockbury, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Place
- Stockbury (ME9)
- Region
- Kent
- Cover
- One year on every job
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Common problems we fix in Stockbury
Mastic ages in the weather. Sunlight dries the surface out, until it loses its stretch and starts to crack.
It’s worth asking for a quote if you see:
- Whistling draughts around closed windows
- Damp patches on the reveal after heavy rain
- Old mastic that has gone black or come away
- Rushed sealant from a window installation
Rented homes near Newington station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Before you book anyone
- The length of the guarantee
- Who turns up on the day
- How hidden problems are handled
- Is the old sealant removed completely?
What affects the quote in Stockbury
Jobs vary more than people expect. What affects the quote:
- Whether the work is at height
- Whether old sealant or filler has to be cut out
- The product the joint needs
- Mould in or behind the old joints
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
What to tell us for a quote
When you call or email, these details help:
- The problem you’ve noticed
- A few photos by email, if you can
- If it’s domestic, commercial or a hotel
- Where the job is, and your postcode
To get a quote, phone 0345 464 0079 or send us an email with the location and a short description of the problem. You’ll have a clear quote before any work starts.
What we do, step by step
We bring everything the job needs with us, so there’s nothing for you to buy. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take most of a day for a typical house, less for a few frames. Somewhere like Stockbury needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- For business premises, tell us about site rules or sign-in
- Move anything stored near the joints
Get a quote
We quote each job on its own, so the first step is telling us about yours. Just ring 0345 464 0079 or drop us an email with the details and send pictures if you have them.
Advice
Frames and glazing around Stockbury
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.
In the older streets around St Mary Magdalene Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Stockbury is about 4 miles west of Sittingbourne, in Kent. Homes, rented property, offices and hotels in Stockbury can book us for window mastic. Every job comes with our 12-month guarantee. Our Kent coverage runs to 922 places, and Stockbury is one of them. Our Chelmsford page covers work nearby.
Here we cover the ME9 postcode area for window mastic. We cover properties on The Street, Hill Green Road and Harrow Court and the roads around them. Nearby, we also carry out window mastic in Yelsted (1 mile west), South Green (1 mile south-east), Hartlip (1 mile north), Lower Hartlip (1 mile north) and Danaway (2 miles north-east). Within a short drive, we also cover Maidstone (6 miles south-west), Sittingbourne (4 miles east), Gravesend (13 miles north-west), Faversham (11 miles east), Northfleet (15 miles north-west) and Minster (9 miles north-east).
What’s near Stockbury
In Stockbury, that means homes and buildings near The Three Squirrels pub and Stockbury Hill Wood. Stockbury’s nearest station is Newington station, about 2.2 miles north-east of the centre. A little further out are Bayford Court (4.6 miles east) and KIMS hospital (4.5 miles south-west). For a walk, there’s Detling Hill.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What sealant work cannot fix
It helps to know what we can’t do:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Damp coming through the wall itself rather than the frame joint
- A frame that has rotted at the joint
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think before booking.
Surfaces we seal
- Composite doors
- uPVC windows
- Aluminium frames
- Patio & French doors
- Timber windows & doors
- Window sills
What happens if it’s left?
Choosing the product is half the job. Interior caulk and bathroom silicone are not made for exterior frame joints. A low-modulus exterior sealant keeps its stretch through hot and cold weather. Older cottages and farmhouses around Stockbury can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- Over 20 years’ experience
- Sanitary silicone with an anti-fungal additive in wet areas
- Experience in homes, commercial sites and hotels
- We never seal over old sealant
Read our cost guide or our reviews.
Landlords, agents and businesses in Stockbury
In hotels, rooms out of use cost money, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.