Kent · England
External Mastic in Chestfield
External mastic for Chestfield, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Damp patches traced to an open external joint
- Plants rooting in failed movement joints
- Movement joints filled with mortar instead of sealant
Chestfield questions
Can you help a landlord with a rental near Chestfield & Swalecliffe station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear quote.
Do you cover smaller places like Chestfield?
Yes. Chestfield is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
How long will you be here?
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.
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. We can always put it right if it fails.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
What should I tell you?
Tell us what needs doing and where, with pictures by email if possible. If we need more, we will ask.
Can you seal joints between two different materials?
Yes. Materials like render, brick, metal and uPVC all move differently, so a flexible sealant is needed where they meet. We choose one that suits both surfaces.
Can you reach joints on upper floors?
Each building is different. Tell us the height, the number of joints and what’s below them.
External mastic in Chestfield, done properly
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We take the old material out and do it properly. If you are dealing with hard, crazed mastic that has stopped moving and brick movement joints where the sealant has split, we can put it right, whatever the surface.
Older homes in small places like Chestfield may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Chestfield (CT5)
- Wider area
- Kent
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Keeping the joints in good condition
So the new joints stay in good condition:
- Keep movement joints as flexible joints, not mortar
- Ask before painting over external sealant
- Keep water from gutters off the wall
- Avoid pressure-washing directly into sealant joints
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.
Different surfaces, different methods
Joints between dissimilar materials
Each side of the joint may need its own preparation. Both surfaces are cleaned and primed as the product requires.
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Towns and villages near Chestfield
Also in Chestfield
Signs you need external mastic in Chestfield
Sometimes a movement joint was filled with mortar or a rigid filler. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Common reasons people contact us include:
- Rigid filler in a joint that should flex
- Water getting into walls through failed joints
- Joints where the bead has come unstuck
- Panel joints letting water in
If you live in an older home near Church of St John the Baptist, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Before booking anyone
- Whether they seal over old material or remove it
- What the quote includes, VAT included or not
- How the surfaces are prepared before sealing
- What happens if the job turns out different
What happens on the day
We bring everything the job needs with us, so you do not need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take anything from a few hours to several days, depending on the building. Somewhere like Chestfield needs a little journey planning: 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.
- 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.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
Getting a quote
Getting a quote is simple: tell us what needs doing and where. Photos by email help us understand the job, and we will come back to you with a quote.
Related advice
What sealant work can’t fix
A few problems are outside what sealant work can do:
- Structural movement, which needs a surveyor or engineer
- Cracking across the wall rather than at a joint
- Failed render or damaged cladding panels
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Where we work in Chestfield
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Façade panels
- Joints between brick and frames
- Render & cladding joints
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Outside joints around Chestfield
Chestfield is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. 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.
For site and facilities teams at buildings such as Swalecliffe Community Primary School, larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Chestfield & Swalecliffe station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Chestfield is about 1 mile east of Whitstable, in Kent. We carry out external mastic for homeowners, landlords and businesses in Chestfield, as part of our work across Kent. Chestfield is one of 922 places in Kent where we work. Our Chelmsford page covers work nearby, about 36 miles away.
Work in CT5 works the same way as everywhere else we cover. Streets in the area include Maydowns Road, Chestfield Road and Woodvale Avenue, all of which we cover. You’ll find Chestfield on the A2990, so it’s easy for us to get to. Neighbouring places we cover for external mastic include Swalecliffe (1 mile north), Tankerton (1 mile north-west), Radfall (1 mile south), West End (1 mile east) and Whitstable (1 mile west). Within a short drive, we also cover Canterbury (5 miles south), Margate (14 miles east), Sittingbourne (14 miles west), Ramsgate (15 miles east), Faversham (8 miles west) and Herne Bay (3 miles east).
What’s near Chestfield
We work in homes and buildings around The Plough pub and The Whitstable School, among other places. There’s a railway station in Chestfield itself: Chestfield & Swalecliffe station. Other landmarks nearby include Whitstable and Tankerton Hospital (0.7 miles north-west) and Tankerton Castle (1.4 miles north-west). Not far away are West Blean and Thornden Woods.
Why it’s worth doing now in Chestfield
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That protects surfaces like brick, render and concrete. A stiffer product can damage the joint edge as it fails. Where a wall is exposed, as many are in small places like Chestfield, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, phone 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why book with us
- An ARBOMaster approved applicator
- One-year guarantee on every job
- Arbo and Everbuild products
- White, clear, grey or another colour, product permitting
See our cost guide and customer reviews.