Isle of Wight · England
External & façade joints in Newtown, Isle of Wight
Specialist external mastic for Newtown: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Rigid filler in a joint that should flex
- Movement joints with cracked, split or missing sealant
- Rain getting behind render or cladding at a joint
What we cannot put right
New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:
- Subsidence or other structural problems
- Cracks in the bricks or render themselves, away from the joints
- Adding movement joints to masonry that has none
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Newtown
- Render & cladding joints
- Concrete & block
- Brickwork movement joints
- Copings & trims
- Façade panels
- Joints between brick and frames
External mastic in Newtown, done properly
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the line blends in. We’re often asked to deal with sealant pulling away from one side of the joint and old sealant gone brittle and cracked, across render & cladding joints, brickwork movement joints and joints between brick and frames.
Older homes in small places like Newtown may be stone, brick or timber-framed, often with later extensions. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
Your job is guaranteed for a year, as with all our work.
- Where
- Newtown (PO30)
- Wider area
- Isle of Wight
- Cover
- One year on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Do you need external mastic in Newtown?
Some movement joints have been pointed up with mortar by mistake. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Common reasons people contact us are:
- Failed sealant between panels on a façade
- Rain getting behind render or cladding at a joint
- Joints where the bead has come unstuck
- Old sealant gone brittle and cracked
Around Newtown, as everywhere, external mastic is only as good as the preparation behind it.
Comparing quotes
- Who turns up on the day
- What preparation is included
- Whether VAT is included
- Which colour the sealant will be
How to look after the new joints
So the new joints stay in good condition:
- Deal with leaking gutters that soak the joints below
- Check external joints each spring
- Get split or bare joints resealed while the damage is small
- Keep movement joints as flexible joints, not mortar
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
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, all bigger jobs than a reseal.
Places near Newtown
Also in Newtown
Why act early in Newtown
A properly done movement joint is an even line in a colour that suits the wall. A hurried job with smeared edges and no backing looks worse and fails sooner. In a small place like Newtown, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Doing several joints on one visit usually makes better use of the time than several visits. You will get one clear quote for the whole job.
Why choose Mr Mastic in Newtown
- We’re fully insured
- You choose the colour before work begins
- Old sealant always removed completely
- Over 20 years’ experience
See our cost guide and customer reviews.
What the job involves on each surface
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. The old joint is removed and a sealant that bonds to both sides goes in.
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best in all weathers.
How the visit works
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes anything from a few hours to several days, depending on the building. For a village or hamlet like Newtown, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- Every bit of old sealant and any mortar or debris is cut out.
- 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.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about earlier repairs to the joints
- Mention any tricky access
Getting a quote
Asking for a quote is easy: tell us what needs doing and where. Photos by email help us understand the job, and we’ll take it from there.
Related advice
What external mastic looks like in Newtown
Newtown 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 is 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
In the older streets around Holy Spirit Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Newtown is about 4 miles west of Newport, in the Isle of Wight. Anywhere in PO30, we can carry out external mastic at your property. Our area takes in 125 places across the Isle of Wight, large and small. We also work in Southampton, around 14 miles away.
Jobs for external mastic in PO30 is quoted and booked the same way as anywhere else. We also cover Locksgreen (1 mile east), Porchfield (1 mile north-east), Great Thorness (2 miles north-east), Forest Side (3 miles east) and Rew Street (4 miles north-east). Further out, we also cover Newport (4 miles east), Ryde (10 miles east), Cowes (5 miles north-east), Sandown (11 miles east), Shanklin (11 miles south-east) and Ventnor (11 miles south-east). Island and remote addresses take a little more planning, so tell us where you are when you ask for a quote.
What’s near Newtown
Nearby you’ll also find St Mary's Hospital (4 miles east) and Carisbrooke Castle (3.7 miles south-east). Open spaces near Newtown include Brighstone Down.
For landlords and businesses
Hotels need rooms back in use, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
We also work for property managers and facilities teams. We can quote a run of properties together.
Common questions in Newtown
Can you do external mastic in Newtown?
Yes, Newtown is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Is Newtown within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What does external mastic cost?
It depends on the job, so we quote each one individually. To get one, ring 0345 464 0079 or drop us an email with a short description of the job.
What’s an expansion joint in brickwork?
Most straight vertical gaps in brickwork are movement joints. It gives the wall room to move.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
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. Then the sealant bonds to two faces and can move.
Are you fully insured?
Yes. We’re fully insured.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.