Kent · England
Hadlow External Mastic
Specialist external mastic for Hadlow: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Leaking joints around cladding and façade panels
- Brick movement joints where the sealant has split
- Weathered mastic that no longer stretches
Quotes for external mastic in Hadlow
There’s no set price list. What we look at:
- The old material and how stubborn it is
- Any working-time requirements on site
- How easy the joints are to reach
- The number and length of the joints
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
Asking for a quote
What to tell us when you ask for a quote:
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
- A few photos by email, if you can
- Any previous sealing or DIY work
We quote each job on its own, so start by telling us what you need. Simply ring 0345 464 0079 or send us an email and describe the job and send photos if you have them.
About our external mastic in Hadlow
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. If you have rigid filler in a joint that should flex and cracked joints where brick meets render or frames, we can help, on render & cladding joints, copings & trims and brickwork movement joints alike.
Somewhere as small as Hadlow, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
Every job comes with our one-year guarantee, wherever you are in Kent.
- Place
- Hadlow (TN11)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Hadlow questions
I let a flat near Beltring station. Can you help?
Yes, we work for landlords and agents. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.
Can you do external mastic in Hadlow?
Yes, Hadlow is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
What is backing rod for?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding.
Do you seal joints where cladding meets other materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
What’s an expansion joint in brickwork?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
Can you match the colour of my brickwork?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best.
Where do you work from?
We are based in Crawley, and we cover South East England, London and all of Scotland.
Hadlow buildings and the weather
With historic houses such as Old Soar Manor (about 2.6 miles north) nearby, there’s older building stock in the area around Hadlow as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. 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.
For an older house near a landmark such as St Mary's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant. If you let a flat or house near Beltring station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Hadlow is about 3 miles north-east of Tonbridge, in Kent. Whether you’re in the middle of Hadlow or further out, external mastic is available for homes and businesses alike. Hadlow is one of 922 towns and villages in Kent where we work. For nearby work, see our Crawley page.
Postcode districts we cover here for external mastic: TN11. That includes homes and businesses on The Square, High Street and Brookfields and the roads around them. Other places close to Hadlow include Pittswood (1 mile west), Goose Green (1 mile north-east), Golden Green (1 mile south), Parker's Green (1 mile south-west) and Barnes Street (1 mile south-east). Within a short drive, we also cover Maidstone (9 miles east), Sevenoaks (7 miles north-west), Royal Tunbridge Wells (7 miles south-west), Gravesend (14 miles north), Tonbridge (3 miles south-west) and Northfleet (14 miles north).
Local landmarks in Hadlow
In Hadlow, that means homes and buildings near Hadlow Rural Community School, Hadlow College and The Rose & Crown pub. The nearest railway station is Beltring station, about 3.3 miles south-east. Well-known places in the area include Hadlow Tower museum (within half a mile south-east) and Tonbridge Cottage Hospital (4.3 miles south-west). Green spaces nearby include Barden Lake and Tudeley Woods RSPB reserve.
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render around the joint, so the problem grows beyond the joint itself. Around Hadlow, 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 the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Hadlow
- Every job guaranteed for a year
- Anti-fungal sanitary silicone in wet areas
- Homes, businesses and hotels
- Full insurance on every job
See our cost guide or what customers say.
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
Letting agents and landlords in Hadlow can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
A careful DIYer can reseal a simple joint, 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.
How it works
Every visit runs the same way: we check the joints, protect the area around them, carry out the job and clear up. Most jobs take a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Hadlow, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Mention any tricky access
- Where the joints are inside, avoid wetting them before we arrive
- For business premises, tell us about site rules or sign-in
How to get a quote
For external mastic in Hadlow, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Read more
Surface by surface
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. Backing rod sized to the joint sets it and keep the sealant to the right depth.
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best in all weathers.
Towns and villages near Hadlow
Also in Hadlow
What we’re called out for in Hadlow
Weeds, moss and debris in a joint are a sign the sealant has gone. Roots and dirt hold water against the wall.
The most common problems we see are:
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
- Weathered mastic that no longer stretches
- Sealant pulling away from one side of the joint
If you look after a building such as Hadlow Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Questions to ask before booking
- Are they insured?
- Is VAT in the price?
- What happens if the job turns out different
- When the joint can take water or movement