West Sussex · England
East Wittering External Mastic
External mastic for East Wittering, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Hard, crazed mastic that has stopped moving
- Panel joints letting water in
- Brick movement joints where the sealant has split
The process
We keep the work tidy and contained to the joints we are treating. The job normally takes a few hours for a handful of joints, longer for a whole elevation, and we tell you how long to leave it before we go. A visit to East Wittering is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- 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.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Try not to wet indoor joints just before the visit
- Let us know about parking restrictions
Ask for a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Read more
How we handle external mastic in East Wittering
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Some surfaces need a primer before sealing and we use one wherever it does. If you have movement joints with cracked, split or missing sealant and damp patches traced to an open external joint, we can help.
Around East Wittering, garages, outbuildings and extensions all add to the joints on the outside of a home. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Place
- East Wittering (PO20)
- Region
- West Sussex
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Avoid pressure-washing directly into sealant joints
- Act on the first splits you see
- Keep movement joints as flexible joints, not mortar
- Look over the joints every year, ideally after winter
Avoid pressure-washing straight into the joints. A strong jet can damage the edges of the bead over time.
Act while the splits are small. Then it’s a straightforward cut-out and reseal.
What happens if it’s left?
Resealing a run of joints in one go is generally better than patching one at a time. They’ve weathered the same way, and access only has to be arranged once. In an older home around East Wittering, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
Why us?
- One-year guarantee on every job
- More than 20 years in sealant work
- We’re fully insured
- An ARBOMaster approved applicator
Take a look at what affects the cost or our reviews.
Signs you need external mastic in East Wittering
Every building moves. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. The sealant in the movement joints takes that strain.
People normally contact us when they notice one of these:
- Weathered mastic that no longer stretches
- Gaps where render, brick and frames meet
- Leaking joints around cladding and façade panels
- Joints where the bead has come unstuck
For an older house near a landmark such as St Anne, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What your quote should include
- Which sealant they’ll use, and why
- Which colour the sealant will be
- How long to leave it before use
- Whether all the old sealant comes out first
Nearby places to East Wittering
Also in East Wittering
Questions from East Wittering
Do you cover smaller places like East Wittering?
Yes, East Wittering is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is East Wittering in your area for external mastic?
Yes. We work across London and the South East, and East Wittering is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
How long before the joint can be used?
Cure times vary by product and the conditions. We tell you how long to leave it before we go.
Is there a guarantee?
Yes. There’s a 12-month guarantee on every job.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
What do you need from me for a quote?
The location, the problem and the rough size of the job. Photos by email help too.
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.
What’s an expansion joint in brickwork?
Brickwork, render and cladding all move a little, and planned joints take up that movement. The gap is sealed with a flexible sealant over backing rod.
Landlord and commercial work in East Wittering
For anyone letting property in or around East Wittering, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and photos by email help.
Housing providers, facilities teams and property managers book us too in East Wittering and across West Sussex. We can quote a run of properties together.
DIY sealant or a professional job?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Surface by surface
Copings and trims
Coping and trim joints face rain and sun head on. Each is resealed with a weatherproof, flexible sealant.
Brickwork movement joints
Vertical joints in long brick walls let the brickwork expand without cracking. We reseal them with a low-modulus sealant over backing rod in a colour to suit the brick.
East Wittering buildings and the weather
East Wittering is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on movement joints and outside wall joints, especially on the side facing the sea. 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.
Managing a site like East Wittering Community Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
East Wittering is about 6 miles south-west of Chichester, in West Sussex. Whether you’re in the middle of East Wittering or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Our area takes in 371 places across West Sussex. For nearby work, see our Portsmouth page (10 miles or so).
All of PO20 is covered for external mastic. Local streets include Church Road, Downview Close and Stocks Lane. Being close to the B2179, East Wittering is simple for us to get to for external mastic. Neighbouring places we cover for external mastic include Earnley (1 mile east), Somerley (2 miles north-east), West Wittering (2 miles north-west), Shipton Green (2 miles north) and Almodington (2 miles north-east). Further out, we also cover Bognor Regis (8 miles east), Chichester (6 miles north-east), Selsey (4 miles south-east), Littlehampton (15 miles east), Emsworth (7 miles north-west) and Portfield (7 miles north-east).
What’s near East Wittering
Typical jobs here are in homes near The Thatched Tavern and the streets around them. Open spaces near East Wittering include Pilsey Island.