Buckinghamshire · England
External & façade joints in Four Ashes, Buckinghamshire
Professional external mastic in and around Four Ashes, with every bit of old sealant taken out first.
- Cracked joints where brick meets render or frames
- Panel joints letting water in
- Joints with sealant missing in places
External mastic in Four Ashes, done properly
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing. We work on façade panels, brickwork movement joints and joints between brick and frames, and the jobs we see most are hard, crazed mastic that has stopped moving and rigid filler in a joint that should flex.
Somewhere as small as Four Ashes, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we will put it right.
- Location
- Four Ashes (HP15, HP13)
- Wider area
- Buckinghamshire
- Cover
- One year on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Ask before painting over external sealant
- Keep movement joints as flexible joints, not mortar
- Tell anyone working on the walls about the movement joints
- Check external joints each spring
Don’t paint over the new sealant unless we’ve said the product is paintable. Many exterior sealants aren’t designed to be painted and spoil the finish.
Once a joint cannot move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.
The process
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. It normally takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Four Ashes needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. 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.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Let us know if you’ve seen damp or leaks
- Clear items away from the joints we’re working on
How to get a quote
Every job is quoted individually, so start by telling us what you need. Simply call 0345 464 0079 or send us an email and describe the job, and photos are welcome.
Related advice
How the job changes by surface
Copings and trims
Joints in copings, parapets and trims are exposed to the worst of the weather. Each is resealed with a weatherproof, flexible sealant.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that is happened, we rake it out and reseal it properly where it can be done safely.
Four Ashes: your questions answered
Will you come out to Four Ashes?
Yes, Four Ashes 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 High Wycombe station?
Yes, landlords and agents are among the people we work for. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear price.
When will the joints need doing again?
It varies with how exposed the wall is and how much the joint moves. Look for splits, hardening or edges coming away and have them redone then.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator and we are fully insured too.
How do I get a quote for external mastic in Four Ashes?
Size, access and the old material all affect the cost. Call for a quick quote and we’ll talk you through it.
What do you put in the joint?
Products from Arbo and Everbuild, among others, picked for each joint. We’ll tell you what we are using and why.
Can you seal over the old sealant?
No, and we never do. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, 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.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Four Ashes buildings and the weather
With historic houses such as Hughenden Manor (about 1 mile west) nearby, there’s older building stock in the area around Four Ashes as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. London and the South East are among 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 Great Kingshill Church of England Combined School, its movement joints, gutters and trims need looking after like any other building’s. For landlords with property near High Wycombe station, split movement joints are easy to miss on a rental until damp shows inside. For an older house near a landmark such as St Michael and All Angels Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
Four Ashes is about 2 miles north of High Wycombe, in Buckinghamshire. If you need external mastic in Four Ashes, please ring 0345 464 0079 or send us an email for a quick quote. We are based in Crawley and cover Buckinghamshire. We cover 263 towns and villages across Buckinghamshire. Reading is on our list too, around 18 miles away.
Every address in HP15 and HP13 is covered for external mastic, from the main roads to the quietest streets. Close by, we work in Cryers Hill (1 mile north), Terriers (1 mile south), Widmer End (1 mile north-east), Hazlemere (1 mile east) and Hughenden Valley (1 mile north-west). Further out, we also cover Aylesbury (12 miles north), Chesham (7 miles north-east), Marlow (6 miles south), Amersham (6 miles east), Beaconsfield (5 miles south-east) and Chalfont St Peter (8 miles south-east).
Landmarks near Four Ashes
We work in homes and buildings around The Royal Grammar School, Pipers Corner School and The Crown pub and the streets around them. For rail, the closest station is High Wycombe station, roughly 1.8 miles south of the centre. Nearby you will also find Roald Dahl Museum and Story Centre (3.6 miles north) and Hospital of St John the Baptist (1.9 miles south). For a walk, there’s Gomm's Wood.
Quotes for external mastic in Four Ashes
The quote reflects the job in front of us. We take into account:
- Access and height
- The number of rooms or windows
- When we can work, for business premises
- Which sealant suits the joint
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Asking for a quote
When you call or email, these details help:
- The type of property
- Any access issues, like height or stairs
- Any previous sealing or DIY work
- Where the property is
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or send us an email.
Places near Four Ashes
More services for Four Ashes
Why act early in Four Ashes
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. Where a wall is exposed, as many are in small places like Four Ashes, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Why Four Ashes clients choose us
- One-year guarantee on every job
- White, clear, grey or another colour, product permitting
- We agree the colour with you first
- Trusted Arbo and Everbuild sealants
Take a look at what affects the cost and our reviews.
When it isn’t the sealant
Some problems need a builder, plumber or other trade rather than us:
- Adding movement joints to masonry that has none
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before booking.
What we seal
- Copings & trims
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Joints between brick and frames
- Concrete & block