Kent · England
Dean Street External Mastic
External mastic for Dean Street, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cracked joints where brick meets render or frames
- Movement joints with cracked, split or missing sealant
- Panel joints letting water in
External mastic in Dean Street, done properly
For buildings in Dean Street, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean joint faces and the right depth. We work on joints between brick and frames, brickwork movement joints and copings & trims, and common reasons people get in touch are joints where the bead has come unstuck and rain getting behind render or cladding at a joint.
In a village or hamlet like Dean Street, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Dean Street (ME15)
- Region
- Kent
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Should I try it myself first?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Different surfaces, different methods
Copings and trims
Metal and stone copings both move with temperature, so the joints need a sealant that stays flexible in all weathers.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that is happened, we rake it out and reseal it properly if the joint can be cleared.
Common questions in Dean Street
Can you help a landlord with a rental near East Farleigh 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’ll give you a fixed price before work begins.
Can you do external mastic in Dean Street?
Yes. We work across London and the South East, and Dean Street is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
Do you have insurance?
Yes, we’re fully insured.
Will there be a smell?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
Should I point up the gap in my brickwork?
No. Cement or mortar can’t stretch. If it has already been filled, we can usually cut it out and reseal it.
Do you remove the old sealant?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Do you use backing rod?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
What sealant work cannot fix
We will not take on work that won’t last, so here’s what sealant can’t put right:
- Cracking across the wall rather than at a joint
- Rising or penetrating damp from elsewhere in the wall
- Structural movement, which needs a surveyor or engineer
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
What we seal
- Concrete & block
- Joints between brick and frames
- Façade panels
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
How it works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours to a few days, depending on the length of joint and the access. For a village or hamlet like Dean Street, 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.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
- Mention any parking rules near the property
Getting a quote
For a quote, ring 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before work begins.
Read more
Aftercare tips
After the cure time, these simple habits help:
- Make sure movement joints are not pointed over
- Avoid pressure-washing directly into sealant joints
- Get split or bare joints resealed while the damage is small
- Fix overflowing gutters above sealed joints
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
If you can see gaps, plants or bare sections in a joint, have it checked. Earlier resealing means a smaller job and a better result.
Outside joints around Dean Street
With historic houses such as Stoneacre (about 3.5 miles east) nearby, there’s older building stock in the area around Dean Street as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as East Farleigh Primary School, its movement joints, gutters and trims need looking after like any other building’s. For landlords with property near East Farleigh station, split movement joints are easy to miss on a rental until damp shows inside. Homes close to Church of Saint Mary include some older properties, and an extension built onto an older house moves differently, and the joint between them takes the strain.
Dean Street is about 2 miles south-west of Maidstone, in Kent. If you need external mastic in Dean Street, it’s easy to get a quote: please call 0345 464 0079 or email us. We are based in Crawley and cover Kent, Dean Street included. Our area takes in 922 places across Kent, from the larger towns to small villages. We also work in London, about 31 miles from Dean Street.
We cover every part of the ME15 postcode area for external mastic. We cover properties on Forge Lane and Dean Street and the roads around them. Neighbouring places we cover for external mastic include East Farleigh (1 mile west), Coxheath (1 mile south), Fant (1 mile north), Kettle Corner (1 mile west) and Farleigh Green (1 mile west). Larger places within reach include Sittingbourne (12 miles north-east), Sevenoaks (14 miles west), Royal Tunbridge Wells (13 miles south-west), Gravesend (13 miles north), Tonbridge (10 miles west) and Northfleet (14 miles north-west).
Near you in Dean Street
We work in homes and buildings around Walnut Tree pub, St Augustine Academy and Quarry Wood. For rail, the closest station is East Farleigh station, roughly 0.6 miles north-west of the centre. A little further out are Allington Castle (3 miles north) and Fremlin Walk (2 miles north-east). The countryside around Dean Street includes Boxley Hills.
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Nearby places to Dean Street
More services for Dean Street
Why act early in Dean Street
Pointing a movement joint with mortar might seem a neat fix, but it locks the joint solid. The movement then cracks the brickwork or render nearby. A flexible sealant over backing rod is what the joint needs. Older cottages and farmhouses around Dean Street can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or email us and we will talk you through it.
What you get with us
- Colour picked to suit the job
- We agree the colour with you first
- Anti-fungal silicone where joints get wet
- We leave the area clean and tidy
Take a look at what affects the cost or customer reviews.