Kent · England
External Mastic in Hillborough
Problem with your movement joints in Hillborough? We remove the old material, prepare the joints and seal them properly.
- Movement joints filled with mortar instead of sealant
- Joints with sealant missing in places
- Leaking joints around cladding and façade panels
External mastic for homes and businesses in Hillborough
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. Common call-outs are for sealant that has lost its bond to the brick or render and rigid filler in a joint that should flex, on copings & trims, joints between brick and frames and brickwork movement joints.
Outbuildings, garages and conservatories around homes in places like Hillborough add more joints to look after. Leaks generally start at a gutter end, a garage door frame or where an extension meets the house.
Each job carries a 12-month guarantee.
- Location
- Hillborough (CT6)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
For landlords and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Towns and villages near Hillborough
Other services in Hillborough
What happens on the day
At the end, we look at the finished work together. The work normally takes a few hours to a few days, depending on the length of joint and the access, depending on the size of the job. For a job in Hillborough, 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 walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires 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
- On commercial sites, let us know about site rules
- Let us know about stairs, lifts or work at height
- Mention if the joints have been sealed before
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Related advice
Questions from Hillborough
Can you help a landlord with a rental near Herne Bay station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Does living near the coast affect external mastic in Hillborough?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Do you seal joints where cladding meets other materials?
Yes. Joints between dissimilar materials are a big part of external work. The sealant is chosen to bond to both sides, primed where needed.
Where do you work from?
Mr Mastic is based in Crawley. We cover Hillborough and the rest of Kent.
Do you cover Hillborough?
Yes. We work in Hillborough and the rest of Kent, as part of our work across South East England, London and Scotland. For a quote, call 0345 464 0079 or email us.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Does someone need to be in?
We need access to the joints, so we’ll agree that with you when we book. For inside work, that normally means someone being in.
How the job changes by surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
Copings and trims
Metal and stone copings both move with temperature, so the joints need a sealant that stays flexible year round.
What affects the cost of external mastic
Some jobs are bigger than they look, and some smaller. What affects the quote:
- The product the joint needs
- Whether the work is at height
- The number of rooms or windows
- The number and length of the joints
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
What to tell us for a quote
To help us quote quickly, please include:
- How we’d reach the joints
- Any previous sealing or DIY work
- Where the job is, and your postcode
- The problem you’ve noticed
To get a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. We will give you a clear price before any work starts.
External mastic in Hillborough: local notes
Hillborough is within about 1 mile of 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 movement joints and outside wall joints, 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 Mary the Virgin, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Managing a site like Reculver Church of England Primary School? Then larger buildings have long runs of movement joint that eventually need resealing. Letting a property close to Herne Bay station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
Hillborough is about 2 miles east of Herne Bay, in Kent. Whether you’re in the middle of Hillborough or further out, we cover external mastic for every kind of property. Across Kent, we cover 922 places, Hillborough among them. Chelmsford is on our list too, about 39 miles from Hillborough.
We work across the CT6 postcode area for external mastic and the streets around it. External mastic is available to properties on Manor Road, Puffin Road and Neville Road. You’ll find Hillborough on the A299, which makes it straightforward to reach with everything needed for external mastic. We also cover the places around Hillborough: Hawthorn (1 mile south-east), Bishopstone (1 mile north), Beltinge (1 mile north-west), Broomfield (1 mile south-west) and Highstead (1 mile south). We also work in nearby towns such as Canterbury (7 miles south-west), Margate (9 miles east), Ramsgate (11 miles east), Broadstairs (11 miles east), Whitstable (6 miles west) and Deal (14 miles south-east).
Near you in Hillborough
Typical jobs here are in homes near Bishopstone Cliffs and The Huntsman And Horn Public House and the streets around them. Hillborough’s nearest station is Herne Bay station, roughly 2.2 miles west. Well-known places in the area include Whitstable and Tankerton Hospital (5.2 miles west). Open spaces near Hillborough include West Blean and Thornden Woods.
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Point out the joints to other trades
- Wash walls gently around the sealant
- Keep movement joints as flexible joints, not mortar
- Walk round the building once a year and look at the joints
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
What happens if it’s left?
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together. In a smaller place like Hillborough, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or send us an email and we will talk you through it.
Why us?
- We agree the colour with you first
- Rated 4.9 stars on Google
- Anti-fungal silicone where joints get wet
- 12-month guarantee on every job
Read what affects the cost or our reviews.