West Sussex · England
External & façade joints in Crawley, West Sussex
Our applicators work in Crawley on sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Rigid filler in a joint that should flex
- Weeds or debris growing in open joints
- Damp patches traced to an open external joint
External mastic for homes and businesses in Crawley
For buildings in Crawley, we reseal external joints of all kinds, from brick movement joints to cladding panels. The preparation is the same whatever the wall: clean joint faces and the right depth. Common call-outs are for joints pointed up with cement by mistake and sealant pulling away from one side of the joint, on joints between brick and frames, concrete & block and brickwork movement joints.
In a large town like Crawley, plenty of buildings are rented or managed, and outside joints are easy to forget. A failed joint above a door or a dripping gutter end is usually the first sign.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Crawley (RH10, RH11, RH12, RH6)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and tidy away. It usually takes a few hours for a handful of joints, longer for a whole elevation. In central Crawley, parking can be tight, so tell us about driveways, permits or nearby car parks. For flats, mention stairs, lifts and shared entrances as well.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- The joint faces are cleaned and primed where the sealant needs it.
- Closed-cell backing rod is fitted to set the depth and stop three-sided bonding.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
Before we arrive
- Mention any sign-in or site rules at work premises
- Let us know about earlier repairs to the joints
- Try not to wet indoor joints just before the visit
Get a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we will take it from there.
Advice
What affects the cost of external mastic
The price is agreed before any work begins. It takes into account:
- When we can work, for business premises
- The size of the job
- The old material and how stubborn it is
- How many rooms, windows or areas are involved
Homes and businesses are quoted the same way: the amount of work, the access and the products needed, along with when we can work on site. Call for a quick quote and we’ll explain what it covers.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- Where the property is
- Whether it’s a home or a business
- Photos by email, if that is easy
- How we’d reach the joints
There’s no standard price list. Instead, we give you a clear quote for your job. To get started, phone 0345 464 0079 or drop us an email.
What we cannot put right
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Failed render or damaged cladding panels
- Cracks in the bricks or render themselves, away from the joints
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If in doubt, ring 0345 464 0079 or email us and we will say what we think.
Where we work in Crawley
- Façade panels
- Concrete & block
- Render & cladding joints
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
For landlords and businesses
We work for landlords and agents as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Why act early in Crawley
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The movement then cracks the brickwork or render nearby. The correct repair is a flexible sealant with the right backing. For landlords in Crawley, failed sealant soon turns into tenant complaints about mould, damp or draughts. Sorting it between tenancies is easier than dealing with it mid-let.
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first.
Why book with us
- We never seal over old sealant
- Neat joints and a tidy finish
- Experience in homes, commercial sites and hotels
- You choose the colour before work begins
Take a look at our cost guide and what customers say.
Aftercare tips
Aftercare is simple:
- Keep high-pressure jets off the joints
- Ask before painting over external sealant
- Keep soil, plants and ivy away from the joints
- Look over the joints every year, ideally after winter
Follow the cure time we give you before the joint is knocked or disturbed. Most exterior sealants skin fast but take longer to cure right through.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
More services for Crawley
What external mastic looks like in Crawley
Crawley was built as one of England’s post-war new towns. Homes here were built in phases, many of them in the post-war decades, so neighbouring houses often have rooflines and wall joints of the same age, wearing out at the same time. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Crawley station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. In the older streets around Friary Church of St Francis and St Anthony, older walls, gutters and the joints where extensions meet them need a flexible sealant. Managing a site like Three Bridges Junior School? Then movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Crawley is about 27 miles south of London, in West Sussex. Homes, rented property, offices and hotels in Crawley is covered for external mastic. Every job comes with our 12-month guarantee. Our area takes in 371 places across West Sussex.
All of RH10, RH11, RH12 and RH6 is covered for external mastic, from the main roads to the quietest streets. Streets in the area include Station Road, Queens Square and High Street. Being close to the A23 and A264, Crawley is simple for us to get to. Nearby, we also carry out external mastic in Southgate (1 mile south-west), Tilgate (1 mile south-east), West Green (1 mile north), Three Bridges (1 mile east) and Langley Green (1 mile north). Within a short drive, we also cover Horsham (7 miles south-west), Haywards Heath (9 miles south-east), Burgess Hill (11 miles south), East Grinstead (8 miles east), Billingshurst (13 miles south-west) and Roffey (5 miles south-west). As one of the bigger places in West Sussex, Crawley has every kind of property, from flats to offices.
Around Crawley
Typical jobs here are in homes near Tilgate Park, St Wilfrid's Catholic School and St Francis of Assisi Catholic Primary School and the streets around them. Crawley has its own railway station: Crawley station. Other landmarks nearby include Crawley Hospital (0.5 miles north-west) and County Mall (under half a mile north-east). Not far away are Tilgate Lake.
Crawley: your questions answered
Do older homes in Crawley need their sealant replacing?
If it hasn’t been replaced for some years, it’s generally worth it. Sealant is a maintenance item: how long it lasts depends on use, cleaning and exposure, and many homes in Crawley may already be on their second or third set.
Do you cover Crawley for external mastic?
Yes. Our work covers London and the South East, and Crawley is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Which products do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
I rent my home. Can I book you?
We’re happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Can new sealant go over the old?
No, it will not last. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Can you seal joints between render and window frames?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. The colour is chosen to suit.