Kent · England
Hever External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Hever. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Sealant pulling away from one side of the joint
- Movement joints with cracked, split or missing sealant
- Water getting into walls through failed joints
About our external mastic in Hever
A movement joint is a deliberate break that lets a wall expand and contract. Its sealant has to flex with the building, season after season, so once it splits or hardens, the joint stops working and water gets in. We work on copings & trims, joints between brick and frames and render & cladding joints, and the jobs we see most are plants rooting in failed movement joints and sealant that has lost its bond to the brick or render.
Outside joints can only be sealed when they’re dry, so work in Hever is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
All our work is covered by a 12-month guarantee, wherever you are in Kent.
- Where
- Hever (TN8)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What we do, step by step
You do not need to clear the whole room or building, just the space around the work. We protect the rest, and the work takes a few hours to a few days, depending on the length of joint and the access in most cases. In a small place like Hever, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Mention if the joints have been sealed before
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
If you are in Hever and need external mastic, ring 0345 464 0079 or email us. Tell us what the problem is and where, and we’ll agree the price before any work begins.
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Why deal with it now?
Running new sealant over the old bead rarely lasts. The new layer can’t bond properly to old, weathered material, so we always take the old sealant out. Older cottages and farmhouses around Hever can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Rather than a set price list, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Hever customers choose us
- White, clear, grey or another colour, product permitting
- Anti-fungal silicone where joints get wet
- Trusted Arbo and Everbuild sealants
- Fully insured
Take a look at how sealant jobs are priced and customer reviews.
Landlord and commercial work in Hever
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Common questions in Hever
Can you do external mastic in Hever?
Yes. Our work covers London and the South East, and Hever is part of that. Just phone 0345 464 0079 or email us with a few details of the job.
Do you cover smaller places like Hever?
Yes. Hever is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
When will the joints need doing again?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges, and reseal at that point.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
What colours does the sealant come in?
There’s a good range of exterior colours, including greys, browns, whites and stone tones. We choose the closest to your brick or render so the joint does not draw the eye.
Which products do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We will tell you what we are using and why.
Can you quote for more than one area?
Yes, we can. More than one area can be quoted together.
How long should I leave it?
That depends on the sealant used, so please follow the time we give you.
Outside joints around Hever
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. With historic houses such as Hever Castle (about 0.4 miles north-east) nearby, there’s older building stock in the area around Hever as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Schools such as Hever Church of England Voluntary Aided Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Homes close to Church of St Peter include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Hever is about 6 miles north-east of East Grinstead, in Kent. For external mastic in and around Hever, it’s easy to get a quote: please phone 0345 464 0079 or email us. We cover Kent from our Crawley base, Hever included. Across Kent, we cover 922 places, and Hever is one of them. There’s also a page for Crawley, roughly 14 miles from Hever.
Jobs for external mastic in TN8 works the same way as everywhere else we cover. You’ll find streets such as Hever Road and Uckfield Lane, all of which we cover. Close by, we work in Newtown (1 mile south), How Green (1 mile north), Markbeech (1 mile south), Chiddingstone Hoath (2 miles south-east) and Chiddingstone Causeway (3 miles east). Larger places within reach include Sevenoaks (8 miles north-east), Royal Tunbridge Wells (8 miles south-east), Tonbridge (7 miles east), Swanley (15 miles north), Kings Hill (14 miles north-east) and Paddock Wood (12 miles east).
Local landmarks in Hever
Typical jobs here are in homes near King Henry VIII pub and Chiddingstone Castle Park and Gardens, among other places. The nearest railway station is Hever station, roughly 0.5 miles west of the centre. A little further out are Haxted Watermill Museum (3.4 miles west) and Hever Castle (within half a mile north-east).
What affects the quote in Hever
There’s no set price list, because jobs vary so much. The quote depends on:
- Any working-time requirements on site
- Which sealant suits the joint
- How easy the joints are to reach
- Whether there’s mould to deal with
Combining jobs into one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
What we need to know
To make quoting easier, let us know:
- What the problem is, such as mould, gaps, leaks or cracking
- Any previous sealing or DIY work
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
We don’t publish a price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.
Signs you need external mastic in Hever
Many joints fail because they were sealed too deep or with nothing behind them. If the sealant sticks to the back as well as the sides, it can’t stretch and tears as soon as the joint widens.
These are the problems we are asked about most:
- Failed seals between different materials
- Joints with sealant missing in places
- Failed sealant between panels on a façade
- Weathered mastic that no longer stretches
For landlords with property near Hever station, outside joints that have cracked can let damp into a rental, so check them between lets.
Before booking anyone
- How the colour is chosen
- How much experience the applicator has
- Is VAT in the price?
- What insurance they hold
Nearby places to Hever
Also in Hever
Can I do it myself?
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Make sure movement joints aren’t pointed over
- Do not let climbing plants root in the sealant
- Show decorators and builders where the movement joints are
- Keep high-pressure jets off the joints
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.