West Berkshire · England
External & façade joints in Newbury, West Berkshire
Sealing brickwork movement joints, render, cladding and façade joints for Newbury, backed by a 12-month guarantee. Call for a quick quote.
- Leaking joints around cladding and façade panels
- Joints where the bead has come unstuck
- Hard, crazed mastic that has stopped moving
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
External mastic in Newbury, done properly
A movement joint is a deliberate break that lets a wall expand and contract. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. Typical jobs include joints with sealant missing in places and weeds or debris growing in open joints, across concrete & block, brickwork movement joints and render & cladding joints.
In a town like Newbury, older houses with traditional gutters sit alongside newer estates with uPVC rooflines and rendered walls. Gutter joints, fascia trims and the movement joints in newer brickwork all need sealant that can flex.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Where
- Newbury (RG14, RG19, RG18, RG20)
- Region
- West Berkshire
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
FAQs for Newbury
I let a flat near Newbury station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Do you cover Newbury for external mastic?
Yes, Newbury is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing, and we will give you a clear price.
Can a movement joint be filled with mortar?
No. Mortar locks the joint solid, so the movement cracks the wall elsewhere. It needs a flexible sealant over backing rod.
Are you insured?
Yes. We’re fully insured.
Where do you work from?
Mr Mastic is based in Crawley. We cover Newbury and the rest of West Berkshire.
Will the new joint stand out?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We pick the one that suits your wall best so it does not stand out.
What does external mastic cost?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or email us with a short description of the job.
What is backing rod for?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Signs you need external mastic in Newbury
Joints sealed without backing rod, or far too deep, rarely last. Sealant bonded to three sides has nowhere to go and tears as soon as the joint widens.
People generally contact us after spotting something like this:
- Rain getting behind render or cladding at a joint
- Failed seals between different materials
- Joints pointed up with cement by mistake
- Weathered mastic that no longer stretches
Schools such as St Nicolas C.E. Junior School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Before you book anyone
- Which colour the sealant will be
- What happens if the job turns out different
- Are they insured?
- Whether the sealant suits the joint
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Keep water from gutters off the wall
- Make sure movement joints aren’t pointed over
- Tell anyone working on the walls about the movement joints
- Clear growth from the base of walls and joints
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
Why deal with it now?
Water gets in through a failed movement joint and can run behind render or cladding. Resealing early keeps the job to the joint itself, rather than the wall around it. In Newbury, as anywhere, most leaks start as a small gap in a joint, and early is when they’re cheapest and quickest to sort.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why book with us
- Approved under the ARBOMaster scheme
- You choose the colour before work begins
- Every job guaranteed for a year
- Homes, businesses and hotels
Take a look at our cost guide and what customers say.
Towns and villages near Newbury
Also in Newbury
Newbury buildings and the weather
Historic houses like Shaw House (about 1 mile north) are a reminder that the area around Newbury has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Rented homes near Newbury station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. In the older streets around St Nicolas Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Newbury is about 15 miles west of Reading, in West Berkshire. Anywhere in RG14, our applicators can take on external mastic. Across West Berkshire, we cover 155 places, Newbury among them. There’s also a page for Reading, roughly 15 miles from Newbury.
Postcode districts we cover here for external mastic: RG14, RG19, RG18 and RG20. Whether your property is on Market Street, London Road and Donnington Square or anywhere close by, our applicators can take on the job. You’ll find Newbury on the A4 and A339, which makes it straightforward to reach. We also cover Greenham (1 mile south-east), Sandleford (1 mile south), Skinners Green (2 miles south-west), Wash Common (2 miles south-west) and Enborne (2 miles west). Further out, we also cover Thatcham (3 miles east), Burghfield Common (11 miles east), Hungerford (8 miles west), Spencers Wood (15 miles east), Calcot (12 miles east) and Lambourn (12 miles north-west). Newbury is one of the larger places we cover in West Berkshire.
Local landmarks in Newbury
Typical jobs here are in homes near Victoria Park, The Diamond Tap and St Bartholomew's School, among other places. There’s a railway station in Newbury itself: Newbury station. Nearby you will also find Donnington Castle (1.6 miles north-west) and West Berkshire Community Hospital (1.5 miles east). Not far away are Audrey's Meadow.
What we do, step by step
We bring everything the job needs with us, so you do not need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. It normally takes anything from a few hours to several days, depending on the building. For a job in Newbury, we need access to where the work is and somewhere nearby to park. For outside work, let us know about side access, gates and any upper-floor joints.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- 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
- Clear the area around the work
- Mention if the joints have been sealed before
- Tell us about any water getting in
Getting a quote
Want a quote for external mastic? Please ring 0345 464 0079 or email us with a few details. We’ll explain what we’d do and send you a clear quote before work begins.
Related advice
What affects the quote in Newbury
For a quick quote, just ask. The main things that affect it are:
- The product the joint needs
- The amount of work
- When we can work, for business premises
- How easy the joints are to reach
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and send you a clear quote before any work starts.
What to tell us for a quote
To help us quote quickly, please include:
- Whether it’s a home or a business
- A few pictures by email, if you can
- If someone has resealed it before
- Where the job is, and your postcode
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few photos by email make the job easier to understand, and we will come back to you with a quote.
Different surfaces, different methods
Joints between dissimilar materials
Joints where frames, sills or panels meet the wall are common leak points. The old joint is removed and a sealant that bonds to both sides goes in.
Concrete and blockwork
Big joints in concrete need careful depth control. Backing rod sized to the joint sets it so the sealant is not too deep.