Medway · England
External Mastic in Blue Bell Hill
External mastic for Blue Bell Hill and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Joints pointed up with cement by mistake
- Rain getting behind render or cladding at a joint
- Leaking joints around cladding and façade panels
About our external mastic in Blue Bell Hill
A movement joint is a deliberate break that lets a wall expand and contract. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. We’re often asked to deal with weathered mastic that no longer stretches and damp patches traced to an open external joint, across brickwork movement joints, façade panels and joints between brick and frames.
Older homes in small places like Blue Bell Hill may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in, and they need the right sealant at the right depth.
Every job comes with our one-year guarantee, wherever you are in Medway.
- Location
- Blue Bell Hill (ME5)
- Wider area
- Medway
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How the job changes by surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. We reseal their joints with backing rod and a flexible product.
Render joints
Cracks along render joints let water in behind the coat. A sound joint keeps the render dry behind.
Landlord and commercial work in Blue Bell Hill
Housing providers, facilities teams and property managers book us too in Blue Bell Hill and across Medway. Several sites can be quoted together.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Do not let climbing plants root in the sealant
- Deal with leaking gutters that soak the joints below
- Point out the joints to other trades
- Look over the joints every year, ideally after winter
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
Act while the splits are small. At that stage it’s a simple cut out and reseal before water has had years to get in.
Nearby places to Blue Bell Hill
Also in Blue Bell Hill
How it works
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours for a handful of joints, longer for a whole elevation. For a village or hamlet like Blue Bell Hill, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we’re working on
- Mention any parking rules near the property
How to get 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 explain how we’d tackle it. When it suits you, call 0345 464 0079 or email us.
Related advice
DIY sealant or a professional job?
The difference is mostly in the preparation and the 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.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
When it isn’t the sealant
We will not take on work that won’t last, so these are the limits:
- Cutting new joints into brickwork, which is building work rather than sealant work
- Render that’s blown, hollow or coming away
- Cracking across the wall rather than at a joint
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Joints and surfaces we work on
- Façade panels
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
- Render & cladding joints
Blue Bell Hill: your questions answered
Is Blue Bell Hill within the area you cover?
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 landlords with property near Snodland station?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Why is there a gap in my brick wall?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move.
How long does the job take?
As a guide, most jobs take anything from a few hours to several days, depending on the building. Bigger jobs take longer, and we will tell you how long to expect.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll give you the cure time for the product we used.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
Do you take out the old sealant first?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Walls and rooflines in Blue Bell Hill
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Starkey Castle (about 2.9 miles north-west) are a reminder that the area around Blue Bell Hill has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
If you let a flat or house near Snodland station, outside joints that have cracked can let damp into a rental, so check them between lets. Managing a site like Tunbury Primary School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Blue Bell Hill is about 2 miles south-west of Chatham, in Medway. For external mastic in and around Blue Bell Hill, please ring 0345 464 0079 or drop us an email for a quick quote. We’re based in Crawley and cover Medway, Blue Bell Hill included. Across Medway, we cover 68 places, and Blue Bell Hill is one of them. There’s also a page for London, about 28 miles away.
Work in ME5 is quoted and booked the same way as anywhere else. Streets in the area include Laurie Gray Avenue, Thorn Close and Barling Close, all of which we cover. We also cover the places around Blue Bell Hill: Kit's Coty (1 mile south), Walderslade (1 mile east), Lordswood (2 miles east), Chatham (2 miles north-east) and Lidsing (2 miles east). Within a short drive, we also cover Gillingham (4 miles north-east), Rochester (4 miles north), Rainham (5 miles north-east), Strood (4 miles north), Luton (3 miles north-east) and Park Wood (4 miles east).
Landmarks near Blue Bell Hill
Locally, jobs take us to homes and businesses close to Greenacre Academy, Westfield Wood and Robin Hood Public House. For rail, the closest station is Snodland station, about 2.5 miles west of the centre. Well-known places in the area include St. Bartholomew's Hospital (3.5 miles north) and Pentagon Shopping Centre (3.6 miles north). The countryside around Blue Bell Hill includes Burham Down and Boxley Hills.
Common problems we fix in Blue Bell Hill
If plants are growing out of a joint, the sealant has normally failed or was never there. Roots and dirt hold water against the wall.
It’s worth asking for a quote if you see:
- Moss and dirt in joints with no sealant left
- Rain getting behind render or cladding at a joint
- Panel joints letting water in
- Joints where the bead has come unstuck
If you live in an older home near St Alban's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What to look for in a quote
- What preparation is included
- Whether the sealant suits the joint
- How the colour is chosen
- What guarantee comes with the work