Kent · England
External Mastic in Twitton
Sealing brickwork movement joints, render, cladding and façade joints for Twitton, backed by a 12-month guarantee. Ask us for a quote.
- Rigid filler in a joint that should flex
- Joints where the bead has come unstuck
- Rain getting behind render or cladding at a joint
About our external mastic in Twitton
For buildings in Twitton, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean, sound faces and a controlled depth. We work on render & cladding joints, joints between brick and frames and façade panels, and people most often call us about panel joints letting water in and weeds or debris growing in open joints.
Outside joints can only be sealed when they’re dry, so work in Twitton is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Twitton (TN14)
- Region
- Kent
- Guarantee
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
The process
The work is kept neat and contained to the area we are working on. The job generally takes anything from a few hours to several days, depending on the building, and we explain the cure time before we leave. For a village or hamlet like Twitton, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Clear items away from the joints we’re working on
- Tell us if parking is tricky
- Mention any sign-in or site rules at work premises
Ask for a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. Whenever you’re ready, phone 0345 464 0079 or send us an email.
Related advice
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Keep high-pressure jets off the joints
- Clear growth from the base of walls and joints
- Tell anyone working on the walls about the movement joints
- Look over the joints every year, ideally after winter
Have a quick look at the joints each spring. Splits, gaps at the edges or plants in the joint are early warning signs.
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 early resealing is worth it.
Quotes for external mastic in Twitton
There’s no set price list, because jobs vary so much. The quote depends on:
- The product the joint needs
- How many areas need sealing
- Whether the work is at height
- Mould in or behind the old joints
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Whether it has been sealed before
- Roughly how big the job is
- A few pictures by email, if you can
- What’s wrong with the joints now
For external mastic in Twitton, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
External mastic in Twitton: local notes
With historic houses such as Lullingstone Castle (about 3.3 miles north) nearby, there’s older building stock in the area around Twitton 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. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Dunton Green station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. If you live in an older home near Twitton Mission Church, an extension built onto an older house moves differently, and the joint between them takes the strain.
Twitton is about 2 miles north of Sevenoaks, in Kent. Whether you are in the middle of Twitton or further out, we cover external mastic for every kind of property. 922 places in Kent are on our list, from the larger towns to small villages. London is on our list too, around 17 miles away.
We work across TN14 for external mastic. Neighbouring places we cover for external mastic include Sepham Heath (1 mile north-west), Otford (1 mile east), Shoreham (1 mile north), Halstead (2 miles north-west) and Knockholt Pound (2 miles west). Within a short drive, we also cover Dartford (9 miles north), Royal Tunbridge Wells (13 miles south), Gravesend (12 miles north-east), Tonbridge (9 miles south-east), Northfleet (11 miles north-east) and Swanley (6 miles north).
Near you in Twitton
We work in homes and buildings around The Rising Sun pub, Polhill Bank and Trinity School. For rail, the closest station is Dunton Green station, roughly 1.2 miles south of the centre. A little further out are Kemsing Castle Bank (2.7 miles east) and Sevenoaks Hospital (2.1 miles south-east). Open spaces near Twitton include Dryhill Nature Reserve.
When it is not the sealant
To be straight with you, there are a few things sealant won’t fix:
- Failed render or damaged cladding panels
- Cracks in the bricks or render themselves, away from the joints
- Adding movement joints to masonry that has none
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Where we work in Twitton
- Copings & trims
- Façade panels
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
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.
What else we do in Twitton
Your questions about external mastic in Twitton
Do you work for landlords with property near Dunton Green station?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear quote.
Do you cover smaller places like Twitton?
Yes, smaller places are covered as well as towns. 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 hotels and businesses?
Yes. We have worked for hotels, offices and other businesses and we’re fully insured.
How long does external mastic last?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
Is there any odour?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Is it OK to seal over old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
Is there a guarantee?
Yes. There’s a 12-month guarantee on every job, wherever you are.
How the job changes by surface
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. We prime where the product needs it.
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. A primer goes on where the product requires one.
Signs you need external mastic in Twitton
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and tears as soon as the joint widens.
If you can see any of these, it’s time to have the joints looked at:
- Weathered mastic that no longer stretches
- Sealant pulling away from one side of the joint
- Movement joints with cracked, split or missing sealant
- Damp patches traced to an open external joint
For site and facilities teams at buildings such as Otford Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Before booking anyone
- Is VAT in the price?
- Whether the sealant suits the joint
- What the cure time is
- Who turns up on the day