Kent · England
Eastry External Mastic
Movement joints in Eastry need attention? We cut out the old, prepare the joints and apply the right sealant.
- Rigid filler in a joint that should flex
- Old sealant gone brittle and cracked
- Failed seals between different materials
Why it’s worth doing now in Eastry
The longer a joint stays open, the more water the wall takes in. Wet masonry is more easily damaged by frost near the open joint, so the problem grows beyond the joint itself. Around Eastry, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
What you pay reflects the work, not guesswork. That’s why we ask about the job first and give you a clear price before we start.
Why Eastry clients choose us
- Quality sealants from Arbo and Everbuild
- Homes, businesses and hotels
- White, clear, grey or another colour, product permitting
- Neat joints and a tidy finish
Read our cost guide and our reviews.
External mastic for homes and businesses in Eastry
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, so once it splits or hardens, the joint stops working and water gets in. We work on concrete & block, render & cladding joints and brickwork movement joints, and people most often call us about sealant pulling away from one side of the joint and joints with sealant missing in places.
Homes around Eastry range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Eastry (CT13)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
For landlords and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Common questions in Eastry
Do you cover smaller places like Eastry?
Yes. Eastry is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Sandwich station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear quote.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
What does external mastic cost?
It depends on the job, so we quote each one individually. To get one, ring 0345 464 0079 or send us an email with a short description of the job.
Can you work on commercial sites?
Yes. We’ve worked for hotels, offices and other businesses.
Can you reach joints on upper floors?
It depends on the building. We work on joints that can be reached safely. Tell us about the building and we’ll confirm what access is needed.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Are you insured?
Yes. We’re fully insured for every job we do.
Eastry buildings and the weather
With historic houses such as Goodnestone Park (about 3.4 miles west) nearby, there’s older building stock in the area around Eastry as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you let a flat or house near Sandwich station, split movement joints are easy to miss on a rental until damp shows inside. In the older streets around Church of St Mary the Virgin, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Eastry is about 4 miles north-west of Deal, in Kent. If you need external mastic in Eastry, please ring 0345 464 0079 or send us an email for a quick quote. We are based in Crawley and cover Kent. Eastry is one of 922 towns and villages in Kent where we work for external mastic. You can also see our page for Chelmsford, roughly 49 miles from Eastry.
We cover every part of the CT13 postcode area for external mastic. You will find streets such as High Street, Swaynes Way and Wheelwrights Way, all of which we cover. We also cover the places around Eastry: Buttsole (1 mile south), Statenborough (1 mile north-east), Ham (1 mile east), Woodnesborough (1 mile north) and Felderland (1 mile north-east). Further out, we also cover Canterbury (10 miles west), Margate (10 miles north), Dover (7 miles south), Folkestone (13 miles south-west), Ramsgate (8 miles north-east) and Broadstairs (10 miles north-east).
Local landmarks in Eastry
We work in homes and buildings around Ham Fen, The Bull Inn And Rear Courtyard and Sandwich Technology School. The nearest railway station is Sandwich station, roughly 2.3 miles north-east of the centre. Well-known places in the area include White Mill (2.5 miles north) and Sandown Castle (4.2 miles east). The countryside around Eastry includes Monk's Wall nature reserve.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Render that is blown, hollow or coming away
- Walls that need new movement joints cut into them
- Rising or penetrating damp from elsewhere in the wall
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly.
What we seal
- Copings & trims
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
- Façade panels
- Render & cladding joints
How we quote for external mastic
For a quick quote, just ask. The main things that affect it are:
- Any mould that needs treating
- When we can work, for business premises
- The number of rooms or windows
- Whether the work is at height
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Asking for a quote
To help us quote quickly, please include:
- Where the job is, and your postcode
- What the problem is, such as mould, gaps, leaks or cracking
- How many joints, rooms or windows are involved
- Photos by email, if that is easy
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work before giving you a price.
Nearby places to Eastry
What else we do in Eastry
Common problems we fix in Eastry
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
Most people get in touch after spotting one of these:
- Rigid filler in a joint that should flex
- Failed sealant between panels on a façade
- Movement joints with cracked, split or missing sealant
- Cracked joints where brick meets render or frames
For site and facilities teams at buildings such as Eastry Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Questions to ask before booking
- Whether the sealant suits the joint
- Which colour the sealant will be
- Is the old sealant removed completely?
- What insurance they hold
How it works
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. It normally takes a few hours for a handful of joints, longer for a whole elevation. For a job in Eastry, we agree the time, the access and parking before the day. 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.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- For indoor joints, keep the area dry beforehand if you can
- For business premises, tell us about site rules or sign-in
Get a quote
We quote each job on its own. Simply call 0345 464 0079 or send us an email and describe the job.
Advice
Should I try it myself first?
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.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.