Kent · England
External Mastic in Hernhill
We cover Hernhill for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Moss and dirt in joints with no sealant left
- Sealant pulling away from one side of the joint
- Panel joints letting water in
External mastic in Hernhill
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, so it bonds to the two sides only and can stretch. We are often asked to deal with movement joints filled with mortar instead of sealant and gaps where render, brick and frames meet, across render & cladding joints, copings & trims and brickwork movement joints.
In a village or hamlet like Hernhill, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Location
- Hernhill (ME13)
- Wider area
- Kent
- Cover
- One year on every job
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What we can’t put right
To be straight with you, there are a few things sealant won’t fix:
- Subsidence or other structural problems
- Cracked brickwork or render that needs a builder or plasterer
- Cutting new joints into brickwork, which is building work rather than sealant work
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly before you book.
Surfaces we seal
- Copings & trims
- Brickwork movement joints
- Façade panels
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
Can I do it myself?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Landlord and commercial work in Hernhill
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Nearby places to Hernhill
Also in Hernhill
Hernhill buildings and the weather
Hernhill is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as Hernhill Church of England Primary School, larger buildings have long runs of movement joint that eventually need resealing. For an older house near a landmark such as Church of St Michael, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Hernhill is about 3 miles east of Faversham, in Kent. If you need external mastic in Hernhill, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We cover Kent from our Crawley base, Hernhill included. Hernhill is one of 922 towns and villages in Kent we cover. We also work in Chelmsford, around 36 miles away.
Work in ME13 is quoted and booked the same way as anywhere else. Close by, we work in Slutshole (1 mile south-west), Staplestreet (1 mile south-west), Dargate (1 mile north-east), Culmers (1 mile north-west) and Goodnestone (1 mile north-west). Larger places within reach include Ashford (12 miles south), Canterbury (6 miles east), Sittingbourne (10 miles west), Whitstable (4 miles north-east), Faversham (3 miles west) and Herne Bay (8 miles north-east).
What’s near Hernhill
Locally, jobs take us to homes and businesses close to Red Lion pub and Mount Ephraim Gardens, among other places. For rail, the closest station is Selling station, about 2.3 miles south-west. Well-known places in the area include Chilham Castle (4.5 miles south) and Whitstable and Tankerton Hospital (5.3 miles north-east). Open spaces near Hernhill include Blean Woods RSPB Reserve.
What happens if it’s left?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. Older cottages and farmhouses around Hernhill can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
Why Hernhill customers choose us
- An ARBOMaster approved applicator
- White, clear, grey or coloured to suit, where the product allows
- Colour agreed with you before work begins
- Old sealant always removed completely
Read our cost guide or customer reviews.
Hernhill: your questions answered
Is Hernhill within the area you cover?
Yes, Hernhill is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is external mastic in a coastal place like Hernhill any different?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected, and the area is left clean when we finish.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and you’ll get one quote.
How long does external mastic last?
It varies from wall to wall: sunny, exposed elevations and busy joints wear faster. A yearly look will tell you when they need doing. Every job carries our 12-month guarantee.
Do you use backing rod?
That is backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
When to call us in Hernhill
Some movement joints have been pointed up with mortar, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Most people get in touch after spotting one of these:
- Leaking joints around cladding and façade panels
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
- Water getting into walls through failed joints
If you let a flat or house near Selling station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Questions to ask before you book
- What the cure time is
- Is the old sealant removed completely?
- How the surfaces are prepared before sealing
- Which colour the sealant will be
The process
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take anything from a few hours to several days, depending on the building. Somewhere as small as Hernhill, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
How to prepare
- Clear the area around the work
- Mention any tricky access
- Tell us if parking is tricky
Getting a quote
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.
Read more
Quotes for external mastic in Hernhill
There’s no set price list, because jobs vary so much. The quote depends on:
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
- How many areas need sealing
- Any working-time requirements on site
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before work begins, so you know where you stand.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- The problem you’ve noticed
- The type of property
- Photos by email, if that’s easy
- Whether it has been sealed before
Getting a quote is simple: let us know what needs doing and where and its rough size. Photos by email help us understand the job, and we will come back to you with a quote.