East Sussex · England
Wannock External Mastic
Professional external mastic in and around Wannock, with every bit of old sealant taken out first.
- Plants rooting in failed movement joints
- Weathered mastic that no longer stretches
- Failed sealant between panels on a façade
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Check the sealant is paintable before painting near it
- Get split or bare joints resealed while the damage is small
- Show decorators and builders where the movement joints are
- Keep movement joints as flexible joints, not mortar
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges and let water in behind.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years.
How we handle external mastic in Wannock
Movement joints let brickwork, render and cladding expand and shrink without cracking. 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 work on brickwork movement joints, render & cladding joints and concrete & block, and people most often call us about failed sealant between panels on a façade and weathered mastic that no longer stretches.
External sealant needs dry, clean surfaces, so work around Wannock is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
All our work is covered by our one-year guarantee, wherever you are in East Sussex.
- Location
- Wannock (BN26)
- Wider area
- East Sussex
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Why it’s worth doing now in Wannock
A low-modulus sealant is chosen because it moves without pulling hard at the edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. In a small place like Wannock, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Rather than a set price list, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why us?
- Colour picked to suit the job
- Neat joints and a tidy finish
- Colour agreed with you before any work starts
- We never seal over old sealant
Read our cost guide or our reviews.
What affects the cost of external mastic
Call for a quick quote. What matters most is:
- The number of rooms or windows
- Whether old sealant or filler has to be cut out
- Mould in or behind the old joints
- The number and length of the joints
Doing several joints on one visit usually makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Asking for a quote
When you contact us, these details help:
- Where the job is, and your postcode
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
- Pictures of the joints, sent by email
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, call 0345 464 0079 or drop us an email.
FAQs for Wannock
I let a flat near Polegate station. Can you help?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear quote.
Is Wannock within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
How do you reach high-level joints?
It depends on the building. Send us pictures and a rough idea of the height, and we will confirm what access is needed.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little.
Should I try DIY first?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Are you fully insured?
Yes. We are fully insured.
Nearby places to Wannock
Also in Wannock
How the visit works
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. It generally takes a few hours to a few days, depending on the length of joint and the access. For a village or hamlet like Wannock, 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.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
- Try not to wet indoor joints just before the visit
How to get a quote
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job.
Read more
How the job changes by surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so the movement is taken up.
Copings and trims
A failed coping joint lets water into the top of the wall. Sealing them early saves the wall below.
External mastic in Wannock: local notes
Historic houses like Alfriston Clergy House (about 3.4 miles west) are a reminder that the area around Wannock has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around St Wilfrid, an extension built onto an older house moves differently, and the joint between them takes the strain. If you look after a building such as Willingdon Community School, larger buildings have long runs of movement joint that eventually need resealing.
Wannock is about 3 miles north-west of Eastbourne, in East Sussex. Every kind of property in Wannock can book us for external mastic. The work is guaranteed for a year. Our area takes in 289 places across East Sussex, large and small. There’s also a page for Brighton, about 16 miles away.
Here we cover the BN26 postcode area for external mastic. We cover properties on Wannock Road, Lancing Way and Mortimer Gardens and the roads around them. Neighbouring places we cover for external mastic include Lower Willingdon (1 mile south-east), Filching (1 mile south-west), Polegate (1 mile north-east), Folkington (1 mile west) and Willingdon (1 mile south-east). Larger places within reach include Eastbourne (3 miles south-east), Hastings (15 miles east), Bexhill-on-Sea (10 miles east), Seaford (6 miles south-west), Lewes (11 miles north-west) and Hailsham (4 miles north).
Near you in Wannock
Typical jobs here are in homes near Horse & Groom pub and Willingdon Primary School. The closest station to Wannock is Polegate station, roughly 0.8 miles north-east. Well-known places in the area include Burlough Castle (2.8 miles west) and Filching Manor And Motor Museum (0.8 miles south-west). Open spaces near Wannock include Combe Hill.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report. Several properties can go on one quote.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
Signs you need external mastic in Wannock
Using the wrong sealant is another common reason. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, so it pulls away from the edges.
Signs it’s time to call us include:
- Joints with sealant missing in places
- Gaps where render, brick and frames meet
- Joints where the bead has come unstuck
- Water getting into walls through failed joints
Rented homes near Polegate station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
What your quote should include
- What guarantee comes with the work
- Which colour the sealant will be
- Whether VAT is included
- How the joint is cleaned and prepared