Kent · England
Herne Window Mastic
Window mastic in Herne from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Water coming in at the bottom corners of a door
- Whistling draughts around closed windows
- Cracked internal joints between frame and plaster
Honest limits
A few problems are outside what sealant work can do:
- A failed sealed unit that has misted up
- A door that needs adjusting, rehanging or new seals
- A sash or casement that won’t close properly
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think.
Surfaces we seal
- Composite doors
- Patio & French doors
- uPVC windows
- Window sills
- Timber windows & doors
- Aluminium frames
Window mastic for homes and businesses in Herne
Whether it’s one leaking patio door or every frame on the house, the work is priced before anything is done. Just phone 0345 464 0079 or drop us an email and tell us how many frames there are and how they’re reached for window mastic in Herne. We work on aluminium frames, timber windows & doors and patio & French doors, and common reasons people get in touch are white mastic on grey or black frames and gaps left after new windows were fitted.
Around Herne, conservatories, garden rooms and patio doors are often part of the house. Those joints need the same attention as the main windows.
Every job is covered by a 12-month guarantee, wherever you are in Kent.
- Where
- Herne (CT6)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Towns and villages near Herne
More services for Herne
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Clean frames with a soft cloth and soapy water
- Make sure the drainage slots aren’t blocked
- Wipe condensation off the frames
- Avoid harsh chemicals near the mastic
A yearly look round the frames is enough. Small splits are simple to catch before they leak.
Leaks usually show up in wet, windy weather, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
FAQs for Herne
Can you help a landlord with a rental near Herne Bay station?
Yes, we work for letting agents and landlords. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before we start.
Will you come out to Herne?
Yes, Herne is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you take out the old sealant first?
Yes, always, and completely. New silicone does not stick to old silicone, so the joint is cleaned back first.
Will resealing my frames help with draughts?
Yes, where the draught is at the frame edge. We find where the air is coming from before we reseal.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses and we’re fully insured.
Do you work on first-floor windows?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we will confirm what’s needed.
Do you seal inside as well as outside?
Yes. Inside, the joint between frame and plaster is sealed neatly, using a paintable sealant if you want to decorate.
Where do you work from?
Mr Mastic is based in Crawley. Our applicators cover Herne.
Quotes for window mastic in Herne
We quote each job individually. These are the things that affect it:
- Access and height
- Whether old sealant or filler has to be cut out
- The number of rooms or windows
- The type of sealant required
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll explain what it covers.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- A few pictures by email, if you can
- What’s wrong with the joints now
- Whether it has been sealed before
- Any access issues, like height or stairs
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved and give you a clear price.
Leave it or put it right?
A quick bead over the top of old mastic looks like an easy fix, but it will not grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. In an older home around Herne, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why us?
- A 12-month guarantee on all work
- 180+ five-star Google reviews
- ARBOMaster approved applicator
- Colour agreed with you before we start
What we do, step by step
The work is kept neat and contained to the area we are working on, so you can get on with your day. Expect the work to take most of a day for a typical house, less for a few frames. For a job in Herne, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about earlier repairs to the joints
- Tell us about any water getting in
Get a quote
We don’t publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.
Related advice
For landlords and businesses
For anyone letting property in or around Herne, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
Housing providers, facilities teams and property managers book us too in Herne and across Kent. We can quote a run of properties together, and we are fully insured.
Can I do it myself?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Frames and glazing around Herne
Herne is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. Rainfall in the South East is lower than in much 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 Church of St Martin, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Managing a site like Herne Church of England Infant School? Then larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Herne Bay station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Herne is about 1 mile south of Herne Bay, in Kent. We provide window mastic to homeowners, landlords and businesses in Herne and nearby. Our area takes in 922 places across Kent, from the larger towns to small villages. We also work in Chelmsford, about 39 miles from Herne.
Jobs for window mastic in CT6 works the same way as everywhere else we cover. That includes homes and businesses on St Martin's View, Ridley Close and Herne Street and the roads around them. Neighbouring places we cover for window mastic include Hunters Forstal (1 mile north-east), Eddington (1 mile north-west), Herne Common (1 mile south-west), Bullockstone (1 mile west) and Broomfield (1 mile north-east). Within a short drive, we also cover Canterbury (5 miles south-west), Margate (11 miles east), Ramsgate (12 miles east), Broadstairs (13 miles east), Whitstable (4 miles west) and Deal (15 miles south-east).
Landmarks near Herne
We work in homes and buildings around Curtis Wood and Herne Bay High School and the streets around them. Herne’s nearest station is Herne Bay station, about 1.2 miles north-west of the centre. A little further out are Whitstable and Tankerton Hospital (3.7 miles west) and Tankerton Castle (4.4 miles west). The countryside around Herne includes West Blean and Thornden Woods.