West Sussex · England
Westergate External Mastic
External mastic for Westergate, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Movement joints filled with mortar instead of sealant
- Rain getting behind render or cladding at a joint
- Plants rooting in failed movement joints
What affects the quote in Westergate
Call for a quick quote. The main things that affect it are:
- Any working-time requirements on site
- How many areas need sealing
- The size of the job
- Which sealant suits the joint
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Ask us for a quote and we’ll explain what it covers.
Asking for a quote
To help us quote quickly, please include:
- Where the job is, and your postcode
- Any access issues, like height or stairs
- The type of property
- Photos by email, if that is easy
Need a quote? Please ring 0345 464 0079 or drop us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
External mastic for homes and businesses in Westergate
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We strip the joint back and start again. If you have rigid filler in a joint that should flex and old sealant gone brittle and cracked, we can help, on copings & trims, concrete & block and render & cladding joints alike.
Outbuildings, garages and conservatories around homes in places like Westergate add more joints to look after. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
A 12-month guarantee comes as standard, so you are covered after we have gone.
- Place
- Westergate (PO20)
- Region
- West Sussex
- Cover
- A year, on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we are called out for in Westergate
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
The most common problems we see are:
- Sealant pulling away from one side of the joint
- Rain getting behind render or cladding at a joint
- Hard, crazed mastic that has stopped moving
- Joints pointed up with cement by mistake
Rented homes near Barnham station change hands often, and split movement joints are easy to miss on a rental until damp shows inside.
What to look for in a quote
- Who does the work, and how experienced they are
- How long to leave it before use
- What preparation is included
- Which sealant they’ll use, and why
Should I try it myself first?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Towns and villages near Westergate
More services for Westergate
How the job changes by surface
Cladding and façade panels
Cladding and façade panels are generally separated by sealed joints. Each joint gets a sealant that suits the panel and its movement.
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so the movement is taken up.
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Point out the joints to other trades
- Look over the joints every year, ideally after winter
- Wash walls gently around the sealant
- Keep movement joints as flexible joints, not mortar
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Act while the splits are small. At that stage it’s a simple cut out and reseal.
External mastic in Westergate: local notes
With historic houses such as Goodwood House (about 4 miles north-west) nearby, there’s older building stock in the area around Westergate as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Aldingbourne Primary School? Then its movement joints, gutters and trims need looking after like any other building’s. Goodwood House, about 4 miles north-west, is one of the historic houses in the wider area around Westergate, and older homes nearby need a sealant that suits their walls.
Westergate is about 3 miles north of Bognor Regis, in West Sussex. We carry out external mastic for homes and businesses in Westergate and the surrounding area, as part of our work across West Sussex. Across West Sussex, we cover 371 places, and Westergate is one of them. We also work in Portsmouth, around 18 miles away.
Jobs for external mastic in PO20 is quoted and booked the same way as anywhere else. Local streets include Oaks Close, Westergate Street and Rosvara Avenue, and we cover them all. We also cover the places around Westergate: Nyton (1 mile north-west), Eastergate (1 mile east), Aldingbourne (1 mile west), Norton (1 mile north-west) and West Barnham (1 mile east). We also work in nearby towns such as Worthing (12 miles east), Bognor Regis (3 miles south), Chichester (5 miles west), Selsey (9 miles south-west), Littlehampton (6 miles east) and Lancing (15 miles east).
Near you in Westergate
Typical jobs here are in homes near Ormiston Six Villages Academy, among other places. For rail, the closest station is Barnham station, about 1.3 miles east. Other landmarks nearby include Tote Copse Castle (1 mile west) and Bognor Regis War Memorial Hospital (3.1 miles south).
Why act early in Westergate
An open joint keeps letting water into the wall with every downpour. Wet masonry is more easily damaged by frost near the open joint, so the problem grows beyond the joint itself. Homes in smaller places like Westergate can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start.
What you get with us
- Anti-fungal silicone where joints get wet
- We never seal over old sealant
- Full insurance on every job
- Rated 4.9 stars on Google
Read what affects the cost or customer reviews.
Westergate: your questions answered
Do you work for landlords with property near Barnham station?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Do you cover smaller places like Westergate?
Yes, Westergate is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you remove the old sealant?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint before we leave.
What does external mastic cost?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before any work starts.
Will you leave a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
How do you reach high-level joints?
It depends on the height and the site. Ground-floor joints are simple; for higher ones, send details and we’ll confirm the access.
Can you match the colour of my brickwork?
We aim for a joint that suits the wall rather than one that jumps out. Colour is agreed with you before we begin from the range available.
What happens on the day
We keep the work tidy and contained to the area we’re working on, so you can get on with your day. Expect the work to take a few hours to a few days, depending on the length of joint and the access, and we tell you how long to leave it before we go. In a smaller place like Westergate, 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.
- We start by walking round the building and agreeing the joints and the access.
- We cut out the old mastic and rake out anything in the joint.
- The faces are brushed clean and primed where the product requires it.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Move anything stored near the joints
Ask for a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, ring 0345 464 0079 or send us an email.