Brighton and Hove · England
External & façade joints in Westdene, Brighton and Hove
External mastic across Westdene and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Failed sealant between panels on a façade
- Old sealant gone brittle and cracked
- Movement joints filled with mortar instead of sealant
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Act on the first splits you see
- Point out the joints to other trades
- Keep soil, plants and ivy away from the joints
- Deal with leaking gutters that soak the joints below
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
External mastic in Westdene, done properly
Many failed façade joints only get noticed once there’s a stain or a damp patch inside. We look over the joints, agree the ones to renew and reseal with a flexible, weatherproof product in a colour to suit. If you have joints with sealant missing in places and joints where the bead has come unstuck, we can put it right.
Homes around Westdene range from older cottages to newer houses, with walls and rooflines of every type. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
Big or small, it’s backed by our one-year guarantee.
- Location
- Westdene (BN1, BN3)
- Wider area
- Brighton and Hove
- Cover
- One year on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Other services in Westdene
The process
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the job takes a few hours for a handful of joints, longer for a whole elevation for a typical job. In a smaller place like Westdene, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- 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.
Before we arrive
- Move anything stored near the joints
- Tell us if parking is tricky
- Mention any leaks or damp you’ve noticed
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you’re ready, call 0345 464 0079 or email us.
Read more
How we quote for external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Working hours on commercial sites
- The number and length of the joints
- Whether there’s mould to deal with
- Whether old sealant or filler has to be cut out
The cost depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
Photos by email are helpful but not essential. Try to tell us:
- Pictures of the joints, sent by email
- Where the job is, and your postcode
- Any access issues, like height or stairs
- The problem you’ve noticed
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or drop us an email.
Why act early in Westdene
Mortar or ordinary filler might look like a quick way to close an open joint, but it stops the joint moving. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. In an older home around Westdene, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. You will know the price before we begin.
Why choose Mr Mastic in Westdene
- Trusted Arbo and Everbuild sealants
- 180+ five-star Google reviews
- Fully insured
- We agree the colour with you first
Read our cost guide or our reviews.
Common questions in Westdene
Does living near the coast affect external mastic in Westdene?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
Will you come out to Westdene?
Yes, Westdene is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
How long before the joint can be used?
That depends on the sealant used, so follow the cure time we give you.
Why do you put foam in the joint first?
Backing rod controls the sealant depth and keeps it off the back of the joint. Then the sealant bonds to two faces and can move.
Do you take out the old sealant first?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
I’m a tenant. Can you help?
Yes. Check with your landlord; we can send the quote to them too.
Outside joints around Westdene
Westdene is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. 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.
Schools such as Westdene Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Letting a property close to Preston Park station? Then outside joints that have cracked can let damp into a rental, so check them between lets. In the older streets around Church of the Ascension, an extension built onto an older house moves differently, and the joint between them takes the strain.
Westdene is about 2 miles north-east of Brighton and Hove, in Brighton and Hove. Homes, rented property, offices and hotels in Westdene is covered for external mastic. The work is guaranteed for a year. 30 places in Brighton and Hove are on our list, from the larger towns to small villages.
Here we cover the BN1 and BN3 postcode area for external mastic. Streets in the area include Mill Road, Croft Road and London Road. Westdene is on the A27, which makes it straightforward to reach. Close by, we work in Patcham (1 mile north-east), Withdean (1 mile south-east), Waterhall (1 mile north), Preston (1 mile south-east) and West Blatchington (1 mile south-west). Larger places within reach include Carlton Hill (3 miles south-east), Hanover (3 miles south-east), Kemptown (3 miles south-east), Whitehawk (3 miles south-east), Bevendean (3 miles south-east) and Saltdean (7 miles south-east).
What’s near Westdene
We work in homes and buildings around Varndean College, Withdean and Westdene Woods and The Sportsman pub, among other places. For rail, the closest station is Preston Park station, roughly 1 mile south of the centre. Well-known places in the area include Clayton Castle (3.5 miles north) and British Engineerium (1.2 miles south-west). Green spaces nearby include Ladies Mile and Wolstonbury Hill.
How the job changes by surface
Copings and trims
Coping joints that leak let water straight down into the wall. Sealing them early saves the wall below.
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. We reseal them with a sealant suited to the panel material.
DIY versus a professional finish
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
When it is not the sealant
To be straight with you, some problems need a different trade:
- Structural movement, which needs a surveyor or engineer
- Cracked brickwork or render that needs a builder or plasterer
- Loose or hollow render, which needs re-rendering
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
Where we work in Westdene
- Façade panels
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Render & cladding joints
- Concrete & block