Buckinghamshire · England
External Mastic in Chartridge
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Chartridge and across Buckinghamshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Joints pointed up with cement by mistake
- Leaking joints around cladding and façade panels
- Rain getting behind render or cladding at a joint
What happens if it’s left?
A failed movement joint lets water into the wall and can run behind render or cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. Where a wall is exposed, as many are in small places like Chartridge, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Combining jobs into one visit generally makes better use of the time than several visits. You’ll get one clear quote for the whole job.
Why choose Mr Mastic in Chartridge
- Tidy, careful work
- Rated 4.9 stars on Google
- Anti-fungal silicone where joints get wet
- Over 20 years’ experience
See our cost guide and customer reviews.
How we handle external mastic in Chartridge
For buildings in Chartridge, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean joint faces and the right depth. We work on render & cladding joints, concrete & block and brickwork movement joints, and the jobs we see most are joints where the bead has come unstuck and leaking joints around cladding and façade panels.
External sealant needs dry, clean surfaces, so work around Chartridge is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Chartridge (HP5)
- Wider area
- Buckinghamshire
- Cover
- 12 months on all our work
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Chartridge
More services for Chartridge
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
FAQs for Chartridge
Do you cover smaller places like Chartridge?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Great Missenden 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 will give you a fixed price before we start.
Is it worth trying it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. Use a flexible sealant with backing rod.
How long should I leave it?
Most sealants are touch-dry well before they’re fully cured. We will give you the cure time for the product we used.
Are you fully insured?
Yes. Mr Mastic is fully insured.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you don’t need to watch us work.
Where are you based?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
How it works
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Chartridge, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- We apply the sealant, tool it and check the whole run.
Before we arrive
- Keep pets and children clear of the area while we work
- For business premises, tell us about site rules or sign-in
- Let us know about stairs, lifts or work at height
How to get a quote
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job.
Read more
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
For anyone letting property in or around Chartridge, several properties can go on one quote. Just tell us the addresses and what each one needs.
Walls and rooflines in Chartridge
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Cholesbury Manor House (about 2.1 miles north) nearby, there’s older building stock in the area around Chartridge as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Letting a property close to Great Missenden station? Then outside joints that have cracked can let damp into a rental, so check them between lets. In the older streets around St John's Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Managing a site like Chartridge Combined School? Then its movement joints, gutters and trims need looking after like any other building’s.
Chartridge is about 2 miles north-west of Chesham, in Buckinghamshire. Chartridge gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Chartridge is one of 263 places in Buckinghamshire where we work for external mastic. We also work in Reading, about 24 miles from Chartridge.
We work across HP5 for external mastic. If you need external mastic at a property on Chartridge Grange Drive and Cogdells Lane or a nearby road, our applicators can take on the job. Nearby, we also carry out external mastic in Asheridge (1 mile north-east), Bellingdon (1 mile north), Hundridge (1 mile south), Ballinger Common (1 mile west) and Pond Park (1 mile east). We also work in nearby towns such as Aylesbury (10 miles north-west), High Wycombe (8 miles south-west), Marlow (12 miles south-west), Amersham (4 miles south-east), Beaconsfield (8 miles south) and Chalfont St Peter (9 miles south-east).
Around Chartridge
In Chartridge, that means homes and buildings near Chiltern Hills Academy and The Bell pub. The nearest railway station is Great Missenden station, about 3.1 miles south-west. Nearby you will also find Roald Dahl Museum and Story Centre (3 miles south-west) and Hawridge Court (1.5 miles north-east). The countryside around Chartridge includes Pavis Wood and Sands Bank.
Aftercare tips
Good habits help new joints last longer. A few tips:
- Walk round the building once a year and look at the joints
- Check the sealant is paintable before painting near it
- Make sure movement joints are not pointed over
- Act on the first splits you see
Keep pressure washers away from the sealant. A strong jet can damage the edges of the bead and let water in behind.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years, so it’s worth resealing at the first signs.
Different surfaces, different methods
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that’s happened, we rake it out and reseal it properly if the joint can be cleared.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.
What we cannot put right
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Loose or hollow render, which needs re-rendering
- Subsidence or other structural problems
- Adding movement joints to masonry that has none
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Copings & trims
- Façade panels
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Joints between brick and frames