Buckinghamshire · England
External & façade joints in The City, Buckinghamshire
Our applicators work in The City on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Cracked joints where brick meets render or frames
- Moss and dirt in joints with no sealant left
- Joints pointed up with cement by mistake
What affects the cost of external mastic
We quote each job individually. This is what makes a difference:
- The size of the job
- How easy the joints are to reach
- Any mould that needs treating
- How many areas need sealing
The cost reflects the work involved, not a rough estimate. That’s why we ask a few questions first and send you a clear quote before we start.
Asking for a quote
When you contact us, these details help:
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
- Photos by email, if that is easy
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
External mastic in The City, done properly
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the line blends in. We work on copings & trims, render & cladding joints and brickwork movement joints, and people most often call us about joints where the bead has come unstuck and rigid filler in a joint that should flex.
Outside joints can only be sealed when they’re dry, so work in The City is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
The work is covered for a year after we finish. If anything isn’t right with it, call 0345 464 0079 or email us.
- Location
- The City (HP14)
- Region
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
External mastic in The City: local notes
With historic houses such as West Wycombe Park House (about 2.7 miles south-east) nearby, there’s older building stock in the area around The City as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Saunderton station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. If you look after a building such as Radnage Church of England Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Homes close to Church of St Paul include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
The City is about 5 miles north-west of High Wycombe, in Buckinghamshire. Across the HP14 area, we can carry out external mastic at your property. The City is one of 263 towns and villages in Buckinghamshire we cover for external mastic. We also work in Reading, around 15 miles away.
Here we cover the HP14 postcode area for external mastic. Local streets include Bottle Square Lane, Radnage Common Road and Green Lane, and we cover them all. If you’re just outside The City, we cover Waterend (1 mile west), Beacon's Bottom (1 mile south-west), Radnage (1 mile north), Bennett End (1 mile north-west) and Green End (1 mile south-east). Further out, we also cover Aylesbury (11 miles north), High Wycombe (5 miles south-east), Chesham (11 miles east), Marlow (7 miles south-east), Amersham (11 miles east) and Beaconsfield (10 miles east).
Near you in The City
Typical jobs here are in homes near The Crown pub and the streets around them. The closest station to The City is Saunderton station, roughly 1.8 miles north-east. Well-known places in the area include Wycombe Hospital (5 miles south-east). Green spaces nearby include Yoesden and Bald Hill.
Can I do it myself?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and does not last so it’s worth doing right. Where a wall is exposed, as many are in small places like The City, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Why The City customers choose us
- Trusted Arbo and Everbuild sealants
- Tidy, careful work
- We are fully insured
- Anti-fungal silicone where joints get wet
See our cost guide and customer reviews.
How it works
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a few hours for a handful of joints, longer for a whole elevation. Somewhere like The City needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip 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.
How to prepare
- Plan for the work area to be out of bounds to pets and children
- Mention any tricky access
- Let us know about earlier repairs to the joints
Ask for a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you are ready, ring 0345 464 0079 or email us.
Related advice
Nearby places to The City
Other services in The City
Different surfaces, different methods
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best.
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
What sealant work cannot fix
Before you book, it’s worth knowing the limits too:
- Structural movement, which needs a surveyor or engineer
- Loose or hollow render, which needs re-rendering
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Surfaces we seal
- Brickwork movement joints
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
- Façade panels
Landlord and commercial work in The City
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Questions from The City
Do you cover smaller places like The City?
Yes, we do. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Is The City in your area for external mastic?
Yes. We work across London and the South East, and The City is part of that. You can phone 0345 464 0079 or email us and let us know what needs doing, and we will give you a clear price.
Do you guarantee your work?
Yes. Every job comes with our 12-month guarantee.
Where is Mr Mastic based?
We are based in Crawley, and we work across South East England, London and Scotland.
I rent my home. Can I book you?
Yes. Check with your landlord; we can send the quote to them too.
Do you work at height?
It depends on the building. Where joints can be reached safely, we’ll do them. Tell us about the building and we will confirm what access is needed.
How do I get a quote for external mastic in The City?
It depends on the job, so we quote each one individually. To get one, phone 0345 464 0079 or send us an email and let us know what needs doing and where.
Can I add another job to the visit?
Yes. Just list everything you need.