Kent · England
Window Mastic in Walmer
Problem with your window and door frames in Walmer? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Cracked or shrunken mastic around the frame
- Black, perished sealant on frames
- Gaps left after new windows were fitted
When something else is needed
To be straight with you, there are a few things sealant won’t fix:
- Faulty window hardware
- Rotten timber, which needs a joiner first
- Damp coming through the wall itself rather than the frame joint
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before you book.
Surfaces we seal
- Composite doors
- Patio & French doors
- Window sills
- uPVC windows
- Timber windows & doors
- Aluminium frames
Window mastic in Walmer
Over two decades of sealing frames has taught us which products suit which walls. We’re fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. We work on uPVC windows, patio & French doors and timber windows & doors, and people most often call us about a bead that doesn’t match the frame and leaking joints at the ends of sills.
Many houses in smaller places like Walmer 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.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Place
- Walmer (CT14)
- Wider area
- Kent
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What happens if it’s left?
Working on frames from a ladder with a sealant gun is not easy, especially upstairs. We cut out properly, back deep gaps and tool every joint neatly, using a product chosen for the frame and wall. Around Walmer, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
Why book with us
- Anti-fungal silicone where joints get wet
- White, clear, grey or coloured to suit, where the product allows
- 4.9 on Google from 180+ five-star reviews
- Homes, businesses and hotels
Take a look at what affects the cost or our reviews.
Common questions in Walmer
Does living near the coast affect window mastic in Walmer?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. Walls facing the sea are generally the first to need attention.
I let a flat near Walmer station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Can you quote for more than one area?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.
What should I tell you?
Just the basics: the address or postcode, what’s wrong and any access issues. Then ring 0345 464 0079 or email us.
Where do you work from?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
Do you come to Walmer?
Yes, we do. Walmer is part of the area we cover.
Does the work come with a guarantee?
Yes. Every job comes with our 12-month guarantee, and we’re fully insured.
DIY sealant or a professional job?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Aftercare tips
To keep the joints looking good and working properly:
- Paint up to the joint, not over it
- Make sure the drainage slots are not blocked
- Clean frames with a soft cloth and soapy water
- Walk round the house once a year and look at the joints
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so early resealing is worth it.
Common problems we fix in Walmer
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces never bonded as it should, and it lets go sooner than it should.
The most common problems we see are:
- Hard, cracked sealant around windows
- Cracked sealant at the sill ends
- Sealant in the wrong colour for the frame
- Mastic that is falling out in pieces
For an older house near a landmark such as St Mary's Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Questions to ask before you book
- How long to leave it before use
- Is the old sealant removed completely?
- Whether VAT is included
- What happens if the job turns out different
Walmer homes and the weather
Walmer is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on the mastic around window and door frames, especially on the side facing the sea. Historic houses like Walmer Castle (about 0.3 miles south-east) are a reminder that the area around Walmer has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For site and facilities teams at buildings such as The Downs Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Rented homes near Walmer 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.
Walmer is about 6 miles north-east of Dover, in Kent. For window mastic in and around Walmer, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We cover Kent from our Crawley base, Walmer included. Our Kent coverage runs to 922 places, and Walmer is one of them. There’s also a page for Chelmsford, roughly 54 miles from Walmer.
Every address in CT14 is covered for window mastic, from the main roads to the quietest streets. Window mastic is available to properties on Lawn Road, York Road and Grams Road. Being close to the A258, Walmer is easy for our applicators to reach. We also cover the places around Walmer: Deal (1 mile north), Mill Hill (1 mile north-west), Great Mongeham (2 miles north-west), Sholden (2 miles north-west) and Ripple (2 miles west). We also work in nearby towns such as Canterbury (15 miles west), Margate (12 miles north), Dover (6 miles south-west), Folkestone (13 miles south-west), Ramsgate (9 miles north) and Broadstairs (11 miles north).
Landmarks near Walmer
Around Walmer, our work takes us to homes and buildings near Goodwin Academy and The Telegraph pub. The nearest railway station is Walmer station, about 0.7 miles west of the centre. Well-known places in the area include Kent Museum of the Moving Image (1.4 miles north) and Walmer Castle (within half a mile south-east).
Nearby places to Walmer
What else we do in Walmer
What we do, step by step
On the day, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work begins. The work usually takes a morning for a couple of windows and a door. A visit to Walmer is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Getting ready for the visit
- Clear items away from the joints we’re working on
- Mention any parking rules near the property
- Let us know if you’ve seen damp or leaks
Getting 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 email photos if that’s easy.
Read more
What affects the cost of window mastic
Every job gets its own quote. This is what makes a difference:
- The size of the job
- Any mould that needs treating
- The product the joint needs
- Access and height
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- What’s wrong with the joints now
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- Where the job is, and your postcode
For window mastic in Walmer, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.