Kent · England
External & façade joints in Great Chart, Kent
Problem with your movement joints in Great Chart? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Panel joints letting water in
- Brick movement joints where the sealant has split
- Old sealant gone brittle and cracked
External mastic in Great Chart
A movement joint is a deliberate break that lets a wall expand and contract. 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’re often asked to deal with failed sealant between panels on a façade and rigid filler in a joint that should flex, on concrete & block, render & cladding joints and joints between brick and frames.
Outside joints can only be sealed when they’re dry, so work in Great Chart is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
There’s a 12-month guarantee on every job, whatever its size.
- Location
- Great Chart (TN23)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What we’re called out for in Great Chart
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Signs it’s time to call us include:
- Sealant that has lost its bond to the brick or render
- Hard, crazed mastic that has stopped moving
- Water getting into walls through failed joints
- Weeds or debris growing in open joints
For site and facilities teams at buildings such as Great Chart Primary School, larger buildings have long runs of movement joint that eventually need resealing.
What your quote should include
- Whether you can choose the colour
- How long the guarantee is
- How much experience the applicator has
- Is VAT in the price?
What happens on the day
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes a few hours to a few days, depending on the length of joint and the access, depending on the size of the job. Somewhere like Great Chart needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- Mention any parking rules near the property
- On commercial sites, let us know about site rules
- Keep children and pets away from the work area
Getting a quote
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 explain what’s involved.
Related advice
Quotes for external mastic in Great Chart
Every job gets its own quote. This is what makes a difference:
- How much old sealant there is and how hard it is to remove
- The number of rooms or windows
- Access and height
- Mould in or behind the old joints
The cost reflects the work involved, not guesswork. That is why we ask about the job first and give you a clear price before we start.
What to tell us for a quote
When you call or email, it’s useful to know:
- The rough size of the job
- Access, such as stairs, a lift or height
- Whether it has been sealed before
- The problem you’ve noticed
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you are ready, ring 0345 464 0079 or drop us an email.
Surface by surface
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. We cut out the old sealant and reseal with a product suited to both surfaces.
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. Backing rod sized to the joint sets it.
Can I do it myself?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
Honest limits
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Cracks in the bricks or render themselves, away from the joints
- Render that’s blown, hollow or coming away
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think before you book.
Surfaces we seal
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
- Façade panels
- Brickwork movement joints
- Concrete & block
Keeping the joints in good condition
Aftercare is simple:
- Avoid pressure-washing directly into sealant joints
- Keep water from gutters off the wall
- Check the sealant is paintable before painting near it
- Keep soil, plants and ivy away from the joints
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Gaps, plants or missing sealant in a joint are worth getting looked at. Early work is quicker and leaves a better finish.
Places near Great Chart
Also in Great Chart
Great Chart: your questions answered
Can you help a landlord with a rental near Ashford International station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Is Great Chart in your area for external mastic?
Yes, Great Chart is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear price.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Does someone need to be in?
It depends on the job. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit.
Will the new joint stand out?
The aim is a neat, even joint in a colour that suits the wall. Colour is agreed with you before we begin.
Great Chart buildings and the weather
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Godinton House (about 1.1 miles north) nearby, there’s older building stock in the area around Great Chart as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Rented homes near Ashford International station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. For an older house near a landmark such as Church of St Mary, an extension built onto an older house moves differently, and the joint between them takes the strain.
Great Chart is about 1 mile west of Ashford, in Kent. We provide external mastic to homeowners, landlords and businesses in Great Chart, as part of our work across Kent. Our area takes in 922 places across Kent, from the larger towns to small villages. For nearby work, see our Crawley page (44 miles or so).
We cover every part of the TN23 postcode area for external mastic and the streets around it. Whether your property is on The Street, Toke Close and The Paddocks or anywhere close by, our applicators can take on the job. Neighbouring places we cover for external mastic include Godinton (1 mile north-east), Chilmington Green (1 mile south-west), Stanhope (1 mile south-east), Ashford (1 mile east) and Fleeden (1 mile south-west). We also work in nearby towns such as Canterbury (14 miles north-east), Sittingbourne (14 miles north), Folkestone (15 miles east), Faversham (12 miles north), Hythe (12 miles south-east) and Davington (12 miles north).
Local landmarks in Great Chart
Around Great Chart, our work takes us to homes and buildings near The Little Black Dog pub, Ashford Community Woodland and John Wallis Academy, among other places. Great Chart’s nearest station is Ashford International station, roughly 1.8 miles east. Other landmarks nearby include County Square (1.6 miles east) and William Harvey Hospital (3.5 miles east). The countryside around Great Chart includes Orlestone Forest.