Kent · England
External Mastic in Bicknor
Movement joints in Bicknor need attention? We remove the old material, prepare the joints and seal them properly.
- Damp patches traced to an open external joint
- Leaking joints around cladding and façade panels
- Old sealant gone brittle and cracked
External mastic in Bicknor
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, render & cladding joints and copings & trims, and the jobs we see most are rigid filler in a joint that should flex and hard, crazed mastic that has stopped moving.
Around Bicknor, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
There’s a 12-month guarantee on every job, large or small.
- Location
- Bicknor (ME9)
- Wider area
- Kent
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How we quote for external mastic
We do not publish a price list. The quote depends on:
- Whether old sealant or filler has to be cut out
- How easy the joints are to reach
- The amount of work
- Whether there’s mould to deal with
The cost reflects the work involved, not guesswork. That’s why we ask about the job first and give you a clear quote before we start.
Helping us quote
You don’t need to know the technical terms. Just tell us:
- The problem you’ve noticed
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- Any access issues, like height or stairs
If you’re in Bicknor and need external mastic, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before any work starts.
For landlords and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Why deal with it now?
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. Too stiff a sealant can pull at the edges and break them. Where a wall is exposed, as many are in small places like Bicknor, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why book with us
- Experience in homes, commercial sites and hotels
- Quality sealants from Arbo and Everbuild
- Tidy, careful work
- Every job guaranteed for a year
Read what affects the cost or customer reviews.
What sealant work can’t fix
We will always be straight with you, so here’s what sealant cannot fix:
- Movement that is more than a sealant joint can take
- Walls that need new movement joints cut into them
- Loose or hollow render, which needs re-rendering
If you’re not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before you book.
Joints and surfaces we work on
- Façade panels
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
Bicknor questions
Do you cover smaller places like Bicknor?
Yes, Bicknor is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for landlords with property near Hollingbourne station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply phone 0345 464 0079 or email us.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
What does external mastic cost?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before work begins.
Can you work on commercial sites?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
Where are you based?
We are a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
What happens on the day
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a few hours for a handful of joints, longer for a whole elevation, depending on the size of the job. Somewhere as small as Bicknor, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Before we arrive
- Let us know about parking restrictions
- Mention if the joints have been sealed before
- Plan for the work area to be out of bounds to pets and children
Get a quote
Want a quote for external mastic? Please ring 0345 464 0079 or email us with a few details. We will explain what we’d do and send you a clear quote before work begins.
Read more
Common problems we fix in Bicknor
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
The most common problems we see are:
- Weathered mastic that no longer stretches
- Sealant pulling away from one side of the joint
- Rigid filler in a joint that should flex
- Panel joints letting water in
In the older streets around Church of St James, an extension built onto an older house moves differently, and the joint between them takes the strain.
Before booking anyone
- Which sealant they’ll use, and why
- Whether all the old sealant comes out first
- How the joint is cleaned and prepared
- Who turns up on the day
Also in Bicknor
Walls and rooflines in Bicknor
With historic houses such as Leeds Castle (about 3.7 miles south-west) nearby, there’s older building stock in the area around Bicknor as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Hollingbourne station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Bicknor is about 4 miles south-west of Sittingbourne, in Kent. Across the ME9 area, we can carry out external mastic at your property. Our Kent coverage runs to 922 places, Bicknor among them. You can also see our page for Chelmsford, about 32 miles away.
We work across ME9 for external mastic and the streets around it. We also cover Hucking (1 mile west), Wormshill (1 mile south-east), Broad Street (2 miles south-west), Hollingbourne (2 miles south-west) and Eyhorne Street (3 miles south-west). Larger places within reach include Maidstone (6 miles west), Ashford (14 miles south-east), Sittingbourne (4 miles north-east), Faversham (9 miles east), Minster (10 miles north-east) and Kings Hill (12 miles west).
What’s near Bicknor
The closest station to Bicknor is Hollingbourne station, roughly 2.8 miles south-west. Well-known places in the area include Leeds Castle (3.7 miles south-west) and KIMS hospital (4.9 miles west). For a walk, there’s Detling Hill.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.