Buckinghamshire · England
External & façade joints in Walton Court, Buckinghamshire
Specialist external mastic for Walton Court: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
- Cracked joints where brick meets render or frames
What sealant work cannot fix
In fairness, there are a few things sealant will not fix:
- Subsidence or other structural problems
- Cracks in the bricks or render themselves, away from the joints
- Walls that need new movement joints cut into them
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
What we seal
- Copings & trims
- Façade panels
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
External mastic in Walton Court
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, so once it splits or hardens, the joint stops working and water gets in. We work on concrete & block, façade panels and joints between brick and frames, and common reasons people get in touch are old sealant gone brittle and cracked and sealant that has lost its bond to the brick or render.
Houses in smaller places like Walton Court can stand more in the open than those in a built-up town, so exposed walls and rooflines take more wind-driven rain. That is where gutter joints and wall joints tend to fail first.
Big or small, it’s backed by our 12-month guarantee in Walton Court and across Buckinghamshire.
- Where
- Walton Court (HP21)
- Wider area
- Buckinghamshire
- Cover
- One year on every job
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Why act early in Walton Court
Mortar or ordinary filler might look like a quick way to close an open joint, but it locks the joint solid. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. Homes in smaller places like Walton Court 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.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Why Walton Court customers choose us
- A sealant colour to suit the surroundings
- A choice of colours where the product allows
- Fully insured
- Homes, businesses and hotels
Read what affects the cost or our reviews.
Work for landlords, hotels and businesses
We work for landlords and agents as well as homeowners. Resealing between tenancies keeps a property looking cared for.
For anyone letting property in or around Walton Court, several properties can go on one quote. Just tell us the addresses and what each one needs.
What we do, step by step
There’s no need to move everything out, only the area right around the joints. We protect the rest, and the work takes a few hours for a handful of joints, longer for a whole elevation in most cases. A visit to Walton Court is planned like any other: the time, the access and where to park are agreed in advance. 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.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Mention any parking rules near the property
- Keep children and pets away from the work area
- Let us know if you’ve seen damp or leaks
Getting a quote
Every job is quoted individually, so the first step is telling us about yours. Simply phone 0345 464 0079 or send us an email and describe the job.
Read more
Outside joints around Walton Court
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as Church of the Good Shepherd, the joints between older walls, newer extensions and the roofline need a sealant that can move. For site and facilities teams at buildings such as Ashmead Combined School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Walton Court is about 1 mile south of Aylesbury, in Buckinghamshire. Walton Court gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. We cover 263 towns and villages across Buckinghamshire, large and small. Our Oxford page covers work nearby (18 miles or so).
We cover every part of the HP21 postcode area for external mastic. Local streets include Tyne Road, Tees Road and Ellen Road. Neighbouring places we cover for external mastic include Sedrup (1 mile west), Bishopstone (1 mile south-west), Upton (3 miles west), Ford (3 miles south-west) and Little Kimble (3 miles south). We also work in nearby towns such as High Wycombe (12 miles south), Chesham (11 miles south-east), Buckingham (15 miles north-west), Amersham (13 miles south-east), Beaconsfield (15 miles south-east) and Princes Risborough (5 miles south).
What’s near Walton Court
In Walton Court, that means homes and buildings near Stoke Mandeville Hospital Classes and The Mandeville School. The nearest railway station is Aylesbury station, roughly 1.1 miles north. Nearby you’ll also find Stoke Mandeville Hospital (0.8 miles east) and National Paralympic Heritage Centre (0.9 miles east). For a walk, there’s Beacon Hill.
How the job changes by surface
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind and protects the render itself.
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
What we’re called out for in Walton Court
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
The most common problems we see are:
- Sealant pulling away from one side of the joint
- Joints with sealant missing in places
- Water getting into walls through failed joints
- Hard, crazed mastic that has stopped moving
Letting a property close to Aylesbury station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What your quote should include
- Which colour the sealant will be
- Which sealant they’ll use, and why
- What happens if the job turns out different
- How much experience the applicator has
Nearby places to Walton Court
What else we do in Walton Court
Common questions in Walton Court
Do you cover Walton Court for external mastic?
Yes. Our work covers London and the South East, and Walton Court is part of that. You can call 0345 464 0079 or email us and tell us what needs doing.
Is Walton Court within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you seal joints where cladding meets other materials?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides, primed where needed.
Will there be a smell?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
I’m a tenant. Can you help?
Of course. Ask your landlord first, and we can send them the quote if that helps.
How long does the job take?
A typical job takes anything from a few hours to several days, depending on the building, including the preparation. We will confirm how long when we quote.
Do you use backing rod?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. Then the sealant bonds to two faces and can move.