Kent · England
Sheerness Window Mastic
Our applicators work in Sheerness on mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- White mastic on grey or black frames
- Old mastic that has gone black or come away
- Untidy mastic left by window fitters
How we quote for window mastic
You will get a clear quote before any work starts. It’s based on:
- Mould in or behind the old joints
- Whether the work is at height
- How much old sealant there is and how hard it is to remove
- How many rooms, windows or areas are involved
What you pay reflects the work, not guesswork. That is why we ask a few questions first and agree the price before starting.
What we need to know
When you call or email, these details help:
- A few pictures by email, if you can
- Any access issues, like height or stairs
- Any previous sealing or DIY work
- The address or postcode of the job
Getting a quote is simple: let us know the job and the location and its rough size. A few photos by email make the job easier to understand.
About our window mastic in Sheerness
Whether it’s one leaking patio door or every frame on the house, the work is priced before anything is done. To get one, call 0345 464 0079 or email us with the number of frames and any access details for window mastic in Sheerness. We work on uPVC windows, patio & French doors and composite doors, and common reasons people get in touch are cracked or shrunken mastic around the frame and sealant in the wrong colour for the frame.
Many houses in smaller places like Sheerness have conservatories, garden rooms or patio doors. Those joints need the same attention as the main windows, and any older timber or sash windows need a sealant that suits them.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Sheerness (ME12)
- Region
- Kent
- Cover
- One year on every job
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Common problems we fix in Sheerness
Joint shape matters as much as the product. A skim of sealant over a wide gap soon tears, and a gap filled solid cannot flex. That is what backing rod is for.
If you can see any of these, it’s time to have the joints looked at:
- Leaking joints at the ends of sills
- Draughty joints inside around the window
- Whistling draughts around closed windows
- Rain getting in at the frame or under the sill
For landlords with property near Sheerness-On-Sea station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
What to look for in a quote
- Is VAT in the price?
- Are they insured?
- Who turns up on the day
- How the colour is chosen
What happens if it’s left?
Working on frames from a ladder with a sealant gun isn’t easy, especially on upper floors. We cut out properly, back deep gaps and tool every joint neatly, using a product chosen for the frame and wall. Around Sheerness, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why us?
- We agree the colour with you first
- A choice of colours where the product allows
- More than 20 years in sealant work
- Arbo and Everbuild products
Take a look at what affects the cost and our reviews.
Places near Sheerness
More services for Sheerness
DIY versus a professional finish
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Common questions in Sheerness
Is Sheerness within the area you cover?
Yes, Sheerness is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Does living near the coast affect window mastic in Sheerness?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and we’ll quote it together.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints, and the area is left clean when we finish.
Where are you based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Will there be a smell?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
I’m a tenant. Can you help?
Yes. Check with your landlord; we can send the quote to them too.
Do you remove the old sealant?
Yes, every time. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
What window mastic looks like in Sheerness
Sheerness is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around window and door frames, especially on the side facing the sea. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Parish Church of the Holy Trinity, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Schools such as Rose Street Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Sheerness is about 7 miles north of Sittingbourne, in Kent. Homes, rented property, offices and hotels in Sheerness can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Our area takes in 922 places across Kent, large and small. We also work in Chelmsford, about 24 miles from Sheerness.
We cover every part of the ME12 postcode area for window mastic and the streets around it. That includes homes and businesses on High Street, Granville Road and Millennium Way. Sheerness sits on or near the A249 and A250, which makes travel easy. If you’re just outside Sheerness, we cover Blue Town (1 mile north-west), Halfway Houses (1 mile south-east), Queenborough (2 miles south), Rushenden (2 miles south-west) and Grain (2 miles north-west). Larger places within reach include Sittingbourne (7 miles south), Whitstable (13 miles south-east), Faversham (10 miles south-east), Davington (10 miles south-east), Foley Park (15 miles south-west) and Preston (10 miles south-east).
Near you in Sheerness
We work in homes and buildings around Oasis Academy Isle of Sheppey, Barton's Point Coastal Park and The Crown pub and the streets around them. There’s a railway station in Sheerness itself: Sheerness-On-Sea station. Other landmarks nearby include Rose Street Cottage of Curiosities (less than half a mile north).
How the job changes by surface
Timber windows & doors
Soft or rotten wood cannot be sealed successfully. We’ll point out any rot we find, as that’s a job for a joiner.
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the new bead is laid against the frame and the wall.
When something else is needed
We’d rather tell you now than do work that won’t last, so these are the limits:
- A door that needs adjusting, rehanging or new seals
- Faulty window hardware
- Misting between the panes of a double-glazed unit (that needs a new unit)
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think.
Where we work in Sheerness
- Aluminium frames
- Patio & French doors
- Composite doors
- Window sills
- uPVC windows
- Timber windows & doors
The process
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes a few hours for a handful of frames, longer for a whole house from start to finish. A visit to Sheerness is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First we look at every frame and agree the list.
- 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.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
Getting ready for the visit
- For business premises, tell us about site rules or sign-in
- Let us know about earlier repairs to the joints
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.