Kent · England
Window Mastic in Cranbrook Common
Professional window mastic in and around Cranbrook Common, with every bit of old sealant taken out first and a 12-month guarantee.
- Draughts coming in around windows and doors
- Draughty joints inside around the window
- Untidy mastic left by window fitters
Window mastic in Cranbrook Common, done properly
Whether it’s one leaking patio door or every frame on the house, you will get a clear quote before we start. Just phone 0345 464 0079 or email us and tell us how many frames there are and how they’re reached for window mastic in Cranbrook Common. Common call-outs are for white mastic on grey or black frames and whistling draughts around closed windows, on patio & French doors, uPVC windows and timber windows & doors.
Homes in small places like Cranbrook Common often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Cranbrook Common (TN17)
- Region
- Kent
- Guarantee
- A year, on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Avoid blasting the frames with a pressure washer
- Keep drainage slots and sill grooves clear
- Walk round the house once a year and look at the joints
- Clean frames with a soft cloth and soapy water
Keep the new mastic undisturbed while it cures, following the cure time we give you. Keep jet washers away from the frames.
Leaks usually show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Cranbrook Common homes and the weather
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Staplehurst station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. Schools such as Cranbrook School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. For an older house near a landmark such as Church of the Holy Trinity, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Cranbrook Common is about 10 miles south of Maidstone, in Kent. We carry out window mastic for homes and businesses in Cranbrook Common and nearby. Cranbrook Common is one of 922 places in Kent where we work for window mastic. For nearby work, see our Crawley page (32 miles or so).
Here we cover the TN17 postcode area for window mastic. We also cover the places around Cranbrook Common: Sissinghurst (1 mile south), Wilsley Pound (1 mile south-west), Knox Bridge (1 mile north), Wilsley Green (2 miles south-west) and Frittenden (2 miles north-east). We also work in nearby towns such as Maidstone (10 miles north), Ashford (13 miles east), Royal Tunbridge Wells (13 miles west), Tonbridge (13 miles north-west), Kings Hill (12 miles north-west) and Foley Park (11 miles north).
Local landmarks in Cranbrook Common
We work in homes and buildings around The Bull Public House and the streets around them. Cranbrook Common’s nearest station is Staplehurst station, about 3.5 miles north. A little further out are Sissinghurst Castle (1 mile east) and Sissinghurst Castle (1 mile east).
Honest limits
New sealant can’t fix everything, and we will tell you before any work starts. Sealant won’t put right:
- A frame that has rotted at the joint
- Damp problems in the wall away from the window
- A sash or casement that will not close properly
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think before booking.
Joints and surfaces we work on
- Window sills
- Patio & French doors
- uPVC windows
- Aluminium frames
- Composite doors
- Timber windows & doors
Places near Cranbrook Common
Also in Cranbrook Common
FAQs for Cranbrook Common
Do you cover smaller places like Cranbrook Common?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Staplehurst station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Can I do it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
What information do you need?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
Where are you based?
We are a Crawley-based firm. We work across South East England, London and Scotland.
Can you match the sealant to my frames?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames normally suit brown.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you.
How many windows can you do in a day?
The work takes a morning for a couple of windows and a door. Access and the amount of old mastic make the biggest difference.
Why deal with it now?
Getting a straight, even bead on an outside frame takes practice, especially on upper floors. We cut out properly, back deep gaps and tool every joint neatly, in a sealant suited to the wall. Around Cranbrook Common, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on how much there is to do, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Why us?
- Homes, businesses and hotels
- Approved under the ARBOMaster scheme
- Every job guaranteed for a year
- Trusted Arbo and Everbuild sealants
How the visit works
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes a few hours for a few frames, or a day or more for a whole house from start to finish. Somewhere like Cranbrook Common needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each frame and agree which ones need doing.
- Next the failed sealant is cut away and the joint cleaned.
- 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.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we are working on
- On commercial sites, let us know about site rules
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, phone 0345 464 0079 or send us an email.
Advice
How the job changes by surface
Composite doors
A composite door normally sits in a plastic outer frame, so its perimeter joint is sealed much like a window. We match the colour to the frame.
Patio & French doors
Door frames take knocks and movement every time the doors are used. A flexible sealant copes with that without cracking.
What affects the cost of window mastic
The price is agreed before any work begins. It’s based on:
- The amount of work
- Which sealant suits the joint
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
What to tell us when you ask for a quote:
- A few pictures by email, if you can
- If someone has resealed it before
- How we’d reach the joints
- What the problem is, such as mould, gaps, leaks or cracking
We don’t publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or send us an email.