Essex · England
Thundersley External Mastic
We cover Thundersley for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Gaps where render, brick and frames meet
- Brick movement joints where the sealant has split
- Failed sealant between panels on a façade
How we handle external mastic in Thundersley
External mastic is a job where short cuts show quickly. New sealant over old, joints packed with mortar and beads with no backing rarely last long. We strip the joint back and start again. Common call-outs are for cracked joints where brick meets render or frames and rigid filler in a joint that should flex, on concrete & block, brickwork movement joints and façade panels.
Thundersley mixes older houses and their gutters with newer estates of brick, render and uPVC trims. Gutter joints, fascia trims and the movement joints in newer brickwork all need sealant that can flex.
Our work is backed for twelve months, in Thundersley and everywhere else we cover.
- Place
- Thundersley (SS7, SS6)
- Region
- Essex
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Landlord and commercial work in Thundersley
For anyone letting property in or around Thundersley, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured.
Places near Thundersley
More services for Thundersley
Honest limits
Sealant is not the answer to every problem, and we will tell you before work begins. Sealant won’t put right:
- Walls that need new movement joints cut into them
- Structural movement, which needs a surveyor or engineer
- Loose or hollow render, which needs re-rendering
If you’re not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer before you book.
What we seal
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Façade panels
- Joints between brick and frames
- Render & cladding joints
Outside joints around Thundersley
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as Thundersley Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. If you live in an older home near Church of St Peter, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Thundersley is about 3 miles north of Canvey Island, in Essex. Anywhere in SS7, we can carry out external mastic at your property. Thundersley is one of 644 places in Essex where we work for external mastic. We also work in Chelmsford, around 12 miles away.
We cover every part of the SS7 and SS6 postcode area for external mastic. You’ll find streets such as Thundersley Church Road, Church Road and London Road, all of which we cover. Neighbouring places we cover for external mastic include South Benfleet (1 mile south-west), Tarpots (1 mile west), North Benfleet (2 miles west), Bowers Gifford (3 miles west) and Nevendon (3 miles north-west). Further out, we also cover Chelmsford (12 miles north), Basildon (5 miles west), Brentwood (12 miles west), Maldon (12 miles north), Canvey Island (3 miles south) and Billericay (8 miles north-west).
Local landmarks in Thundersley
Around Thundersley, our work takes us to homes and buildings near The Deanes School and the streets around them. The nearest railway station is Rayleigh station, about 1.7 miles north-east of the centre. A little further out are Rayleigh Castle (1.7 miles north-east) and Chartwell Private Hospital (2.9 miles south-east). Open spaces near Thundersley include Little Haven Nature Reserve.
Can I do it myself?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What we do, step by step
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The job generally takes anything from a few hours to several days, depending on the building from start to finish. A visit in Thundersley needs access to the work and a place to park close by. If the job is outside, mention gates, side access and anything above ground floor.
- 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.
- 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.
How to prepare
- Let us know about stairs, lifts or work at height
- Mention any leaks or damp you’ve noticed
- Tell us about any previous sealing or DIY attempts
Ask for a quote
We do not publish a price list, because every job is different. Instead, we send you a clear quote for your job. To get started, phone 0345 464 0079 or email us.
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FAQs for Thundersley
I let a flat near Rayleigh station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
Is there a guarantee on external mastic in Thundersley?
All our work, in Thundersley and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Are you an approved applicator?
Yes. We are an ARBOMaster approved applicator, which is run for the Arbo sealant brand.
Why do you put foam in the joint first?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. Then the sealant bonds to two faces and can move.
Where are you based?
We work from Crawley. We cover Thundersley and the rest of Essex.
How do I get a quote for external mastic in Thundersley?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
How long will you be here?
Most jobs take a few hours to a few days, depending on the length of joint and the access. We will confirm how long when we quote.
Can new sealant go over the old?
No, it will not last. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
What affects the quote in Thundersley
Call for a quick quote. What matters most is:
- Access and height
- The number of rooms or windows
- The old material and how stubborn it is
- The type of sealant required
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or send us an email.
Helping us quote
You don’t need to know the technical terms. Just tell us:
- Where the property is
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
- Access, such as stairs, a lift or height
To get a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.
Common problems we fix in Thundersley
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, so it pulls away from the edges.
It’s worth asking for a quote if you see:
- Hard, crazed mastic that has stopped moving
- Leaking joints around cladding and façade panels
- Brick movement joints where the sealant has split
- Water getting into walls through failed joints
Rented homes near Rayleigh station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
What to look for in a quote
- What guarantee comes with the work
- What insurance they hold
- What the cure time is
- How much experience the applicator has
What the job involves on each surface
Render joints
Cracks along render joints let water in behind the coat. Resealing the joints early keeps water out and helps it last.
Cladding and façade panels
Cladding and façade panels are usually separated by sealed joints. Each joint gets a sealant that suits the panel and its movement.