Kent · England
External & façade joints in Mill Hill, Kent
Professional external mastic in and around Mill Hill, with every bit of old sealant taken out first and a 12-month guarantee.
- Leaking joints around cladding and façade panels
- Old sealant gone brittle and cracked
- Rain getting behind render or cladding at a joint
How we handle external mastic in Mill Hill
On houses, flats and commercial buildings across Mill Hill, we reseal joints in brickwork, render, cladding and façade panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. If you’re dealing with moss and dirt in joints with no sealant left and damp patches traced to an open external joint, we can help, on façade panels, render & cladding joints and concrete & block alike.
Homes around Mill Hill range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Mill Hill (CT14)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Leave it or put it right?
An open joint keeps letting water into the wall with every downpour. In cold weather, frost can damage wet brick and render, so the problem grows beyond the joint itself. Homes in smaller places like Mill Hill can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Mill Hill customers choose us
- Every job guaranteed for a year
- ARBOMaster approved applicator
- 4.9 on Google from 180+ five-star reviews
- Old sealant always removed completely
See what affects the cost or our reviews.
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Keep water from gutters off the wall
- Ask before painting over external sealant
- Do not let climbing plants root in the sealant
- Walk round the building once a year and look at the joints
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead.
Small splits are the time to act. At that stage it’s a simple cut out and reseal before water has had years to get in.
How the job changes by surface
Cladding and façade panels
If the façade has a specified sealant, that’s what we use. Tell us what the building has when you get in touch.
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best.
External mastic in Mill Hill: local notes
Mill Hill is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That is hard on movement joints and outside wall joints, especially on the side facing the sea. With historic houses such as Walmer Castle (about 1.4 miles south-east) nearby, there’s older building stock in the area around Mill Hill as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Rented homes near Walmer station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. In the older streets around St Richard, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Mill Hill is about 1 mile west of Deal, in Kent. Whether you’re in the middle of Mill Hill or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. We cover 922 towns and villages across Kent, from the larger towns to small villages. Our Chelmsford page covers work nearby.
We cover every part of CT14 for external mastic. Streets in the area include Mary Road, Glack Road and Lydia Road, all of which we cover. Other places close to Mill Hill include Great Mongeham (1 mile west), Deal (1 mile east), Sholden (1 mile north), Sholden Meadows (1 mile north) and Walmer (1 mile south-east). We also work in nearby towns such as Canterbury (14 miles west), Margate (12 miles north), Dover (6 miles south-west), Folkestone (13 miles south-west), Ramsgate (9 miles north) and Broadstairs (11 miles north).
What’s near Mill Hill
Around Mill Hill, our work takes us to homes and buildings near The Mill Inn, Goodwin Academy and Betteshanger Park, among other places. For rail, the closest station is Walmer station, roughly 0.7 miles south-east of the centre. Well-known places in the area include Kent Museum of the Moving Image (1.3 miles north-east) and Deal Castle (1.3 miles east).
Common questions in Mill Hill
Is Mill Hill within the area you cover?
Yes, Mill Hill is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Walmer station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Do you have insurance?
Yes, we are fully insured.
How much does external mastic cost in Mill Hill?
It depends on the job, so we quote each one individually. For a quick quote, call 0345 464 0079 or email us and tell us what needs doing and where.
Will the new joint stand out?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render so the joint does not draw the eye.
Can you seal joints between render and window frames?
Yes. Joints between dissimilar materials are a big part of external work. We use a flexible sealant suited to both surfaces with primer where required.
What’s an expansion joint in brickwork?
Walls move with heat, cold and moisture, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
Can I add another job to the visit?
Yes. Just list everything you need.
The process
Most of a good job is in the preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it usually takes a few hours for a handful of joints, longer for a whole elevation. Parking around Mill Hill is normally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
- Let us know if you’ve seen damp or leaks
Get a quote
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.
Related advice
Nearby places to Mill Hill
Also in Mill Hill
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
We also work for property managers and facilities teams in Mill Hill and across Kent. We can quote a run of properties together, and we are fully insured for the work.
Do you need external mastic in Mill Hill?
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
Look out for these signs:
- Leaking joints around cladding and façade panels
- Weeds or debris growing in open joints
- Cracked joints where brick meets render or frames
- Sealant that has lost its bond to the brick or render
If you look after a building such as St Mary's Catholic Primary School, larger buildings have long runs of movement joint that eventually need resealing.
What your quote should include
- How the joint is cleaned and prepared
- How long to leave it before use
- Is the old sealant removed completely?
- Whether you can choose the colour
What sealant work can’t fix
We’d rather tell you now than do work that won’t last, so these are the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Rising or penetrating damp from elsewhere in the wall
- Cracking across the wall rather than at a joint
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly before you book.
Surfaces we seal
- Copings & trims
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints