West Sussex · England
External & façade joints in Balcombe Lane, West Sussex
Professional external mastic in and around Balcombe Lane, with old sealant always removed completely.
- Water getting into walls through failed joints
- Movement joints with cracked, split or missing sealant
- Leaking joints around cladding and façade panels
External mastic in Balcombe Lane
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. If you have sealant pulling away from one side of the joint and old sealant gone brittle and cracked, we can help, on render & cladding joints, concrete & block and façade panels alike.
Around Balcombe Lane, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water normally gets in.
All of our work is guaranteed for twelve months.
- Location
- Balcombe Lane (RH17)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Balcombe Lane buildings and the weather
Historic houses like Tyes Place (about 3 miles south-west) are a reminder that the area around Balcombe Lane has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around The Parish Church of St Mary, the joints between older walls, newer extensions and the roofline need a sealant that can move. For landlords with property near Balcombe station, outside joints that have cracked can let damp into a rental, so check them between lets.
Balcombe Lane is about 4 miles south-east of Crawley, in West Sussex. Homes, rented property, offices and hotels in Balcombe Lane is covered for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Across West Sussex, we cover 371 places, Balcombe Lane among them.
Our applicators cover all of RH17 for external mastic and the streets around it. Neighbouring places we cover for external mastic include Balcombe (1 mile south), Worth Abbey (2 miles north-east), Furnace Green (2 miles north-west), Pease Pottage (3 miles west) and Staplefield (3 miles south-west). We also work in nearby towns such as Crawley (4 miles north-west), Horsham (8 miles west), Haywards Heath (5 miles south), Burgess Hill (8 miles south), East Grinstead (6 miles north-east) and Broadfield (4 miles north-west).
Near you in Balcombe Lane
We work in homes and buildings around Oriel High School. The closest station to Balcombe Lane is Balcombe station, roughly 1.3 miles south of the centre. Other landmarks nearby include Crawley Museum (3.9 miles north-west) and Waterbury Castle (4.8 miles south-east). For a walk, there’s Blunts Wood and Paiges Meadow and Tilgate Lake.
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Point out the joints to other trades
- Leave the joints unpainted unless we have said otherwise
- Get split or bare joints resealed while the damage is small
- Keep high-pressure jets off the joints
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Act while the splits are small. At that stage it’s a simple cut out and reseal with no damage behind it to deal with.
Signs you need external mastic in Balcombe Lane
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 rips as the joint opens.
The most common problems we see are:
- Joints with sealant missing in places
- Movement joints filled with mortar instead of sealant
- Sealant that has lost its bond to the brick or render
- Cracked joints where brick meets render or frames
Managing a site like Balcombe CofE Controlled Primary School? Then larger buildings have long runs of movement joint that eventually need resealing.
Before you book anyone
- What happens if they find a problem under the old sealant
- The length of the guarantee
- Which sealant they’ll use, and why
- What preparation is included
Common questions in Balcombe Lane
Can you do external mastic in Balcombe Lane?
Yes, Balcombe Lane is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or email us with a few details of the job.
Can you help a landlord with a rental near Balcombe station?
Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Are you fully insured?
Yes. Mr Mastic is fully insured.
Will the new joint stand out?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render so it does not stand out.
How long before the joint can be used?
That depends on the sealant used, so please follow the time we give you when we finish.
What’s an expansion joint in brickwork?
A vertical gap in a long brick wall is generally a movement joint. It gives the wall room to move, and it should be sealed with a flexible sealant.
Can you seal joints between two different materials?
Yes. Where different materials meet is one of the most common joints we seal. We use a flexible sealant suited to both surfaces with primer where required.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and we’ll quote it together.
When it is not the sealant
To be straight with you, some problems need a different trade:
- Cracking across the wall rather than at a joint
- Loose or hollow render, which needs re-rendering
- Rising or penetrating damp from elsewhere in the wall
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- Brickwork movement joints
- Render & cladding joints
- Copings & trims
- Concrete & block
- Joints between brick and frames
- Façade panels
Landlord and commercial work in Balcombe Lane
We work for landlords and agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Letting agents often deal with us directly. Tell us the address, the job and how access works.
What we do, step by step
We bring everything the job needs with us. Once we’ve agreed what’s being done, we protect the area and start. Most jobs take anything from a few hours to several days, depending on the building. Somewhere like Balcombe Lane needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Keep children and pets away from the work area
- Let us know about stairs, lifts or work at height
Get a quote
Getting a quote is simple: let us know the job and the location and its rough size. A few photos by email make the job easier to understand.
Related advice
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, 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.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Also near Balcombe Lane
Also in Balcombe Lane
What the job involves on each surface
Concrete and blockwork
Wide joints in concrete need the depth controlling carefully. We size the backing rod to the gap so the sealant is not too deep.
Cladding and façade panels
Metal and composite panels move a lot with temperature, so the joint sealant has to cope with frequent movement. We choose the product to suit.