West Sussex · England
External & façade joints in Little London, West Sussex
Movement joints in Little London need attention? We remove the old material, prepare the joints and seal them properly.
- Leaking joints around cladding and façade panels
- Weeds or debris growing in open joints
- Rain getting behind render or cladding at a joint
Aftercare tips
Good habits help new joints last longer. A few tips:
- Check external joints each spring
- Check the sealant is paintable before painting near it
- Keep soil, plants and ivy away from the joints
- Get split or bare joints resealed while the damage is small
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
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.
External mastic in Little London, done properly
Short cuts in external joints show up within a season or two. New sealant over old, joints packed with mortar and beads with no backing all tend to fail early. We strip the joint back and start again. Common call-outs are for plants rooting in failed movement joints and movement joints filled with mortar instead of sealant, on concrete & block, façade panels and brickwork movement joints.
Somewhere as small as Little London, homes and farm buildings often face open ground, 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.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Where
- Little London (RH17)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and clear up. Most jobs take a few hours to a few days, depending on the length of joint and the access. Somewhere as small as Little London, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- For business premises, tell us about site rules or sign-in
- Keep children and pets away from the work area
- Tell us if parking is tricky
Getting a quote
Want a quote for external mastic? Please call 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
When something else is needed
We’ll always be straight with you, so here’s what sealant cannot fix:
- Damp that is not coming from the joint
- Structural movement, which needs a surveyor or engineer
- Walls that need new movement joints cut into them
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think.
Where we work in Little London
- Concrete & block
- Render & cladding joints
- Façade panels
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
Also near Little London
What else we do in Little London
FAQs for Little London
Do you cover Little London for external mastic?
Yes, Little London is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear quote.
Can you help a landlord with a rental near Balcombe station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Is it OK to fill a movement joint with cement?
No, not where the gap is a movement joint. Pointing it stops it working. A flexible sealant is the right fill.
When will the joints need doing again?
That varies with the weather the wall faces, how much it moves and the sealant used. Treat it as a maintenance item and look at it yearly and renew it when it starts to fail.
How long before the joint can be used?
It depends on the product and the conditions. Before we leave, we will tell you the cure time.
Where is Mr Mastic based?
We’re based in Crawley, and we work across South East England, London and Scotland.
How do I get a quote for external mastic in Little London?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or send us an email and let us know what needs doing and where.
What colours does the sealant come in?
We choose a sealant colour to suit the brick, stone or render so the joint blends in. There’s a wide choice of exterior colours.
Signs you need external mastic in Little London
A lot of failed joints come down to preparation: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
Most people get in touch when they notice something like this:
- Water getting into walls through failed joints
- Joints pointed up with cement by mistake
- Failed seals between different materials
- Joints where the bead has come unstuck
Letting a property close to Balcombe station? Then outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- Whether the sealant suits the joint
- Whether you can choose the colour
- What happens if the job turns out different
- Who turns up on the day
Little London buildings and the weather
With historic houses such as Priest House (about 1.8 miles north-east) nearby, there’s older building stock in the area around Little London as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. 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.
If you look after a building such as St Peter's CofE Primary School, larger buildings have long runs of movement joint that eventually need resealing. Homes close to St Peter's Church include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Little London is about 4 miles north of Haywards Heath, in West Sussex. Jobs in Little London get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Little London is one of 371 places in West Sussex we cover. Crawley is on our list too, about 6 miles from Little London.
All of RH17 is covered for external mastic. If you are just outside Little London, we cover Ardingly (1 mile south), Highbrook (1 mile east), West Hoathly (2 miles north-east), Sharpthorne (2 miles north-east) and Selsfield Common (2 miles north). Within a short drive, we also cover Crawley (6 miles north-west), Horsham (10 miles west), Haywards Heath (4 miles south), Burgess Hill (7 miles south), East Grinstead (6 miles north-east) and Broadfield (6 miles north-west).
Near you in Little London
Typical jobs here are in homes near The Gardeners Arms, among other places. The closest station to Little London is Balcombe station, roughly 2.3 miles west of the centre. Nearby you will also find Princess Royal Hospital (4.6 miles south) and Waterbury Castle (2.5 miles south-east). Not far away are Tilgate Lake and Blunts Wood and Paiges Meadow.
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Surface by surface
Cladding and façade panels
Cladding and façade panels are usually separated by sealed joints. We reseal them with a sealant suited to the panel material.
Brickwork movement joints
Brick walls have vertical movement joints to absorb expansion. They’re resealed over backing rod with a low-modulus sealant coloured to suit the wall.
Landlord and commercial work in Little London
Hotels need rooms back in use, so the work can be planned room by room. We have worked in hotels as well as homes and businesses.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.