Kent · England
External Mastic in Newingreen
Professional external mastic in and around Newingreen, with old sealant always removed completely and a 12-month guarantee.
- Joints pointed up with cement by mistake
- Hard, crazed mastic that has stopped moving
- Movement joints with cracked, split or missing sealant
How we handle external mastic in Newingreen
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it, and we do not skip that step. We work on render & cladding joints, copings & trims and brickwork movement joints, and common reasons people get in touch are movement joints filled with mortar instead of sealant and old sealant gone brittle and cracked.
Around Newingreen, older buildings can be stone, brick or timber-framed, many with extensions added later. Where one material meets another is where water generally gets in, and they need the right sealant at the right depth.
Big or small, you get the same 12-month guarantee.
- Where
- Newingreen (CT21)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
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 fails, we can still redo it.
Outside joints around Newingreen
Newingreen is within about 3 miles 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 Pedlinge Chapel, the joints between older walls, newer extensions and the roofline need a sealant that can move. Rented homes near Westenhanger station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Newingreen is about 2 miles north-west of Hythe, in Kent. Anywhere in CT21, we can carry out external mastic at your property. Newingreen is one of 922 places in Kent where we work for external mastic. We also work in Chelmsford, around 51 miles away.
We work across the CT21 postcode area for external mastic and the streets around it. Streets in the area include Stone Street and Ashford Road, all of which we cover. Other places close to Newingreen include Westenhanger (1 mile north), Berwick (1 mile south-west), Lympne (1 mile south-west), Pedlinge (1 mile south-east) and Sandling (1 mile east). Within a short drive, we also cover Ashford (8 miles north-west), Canterbury (13 miles north), Dover (12 miles east), Folkestone (6 miles east), Tower Hamlets (12 miles east) and Hawkinge (6 miles east).
Around Newingreen
Typical jobs here are in homes near The Royal Oak Public House, Brockhill Park Performing Arts College and Sandling Park and the streets around them. The nearest railway station is Westenhanger station, about 0.6 miles north of the centre. Nearby you’ll also find Lympne Castle (1.2 miles south-west) and Royal Victoria Hospital (5.9 miles east). Not far away are Tolsford Hill and Hatch Park.
FAQs for Newingreen
Does living near the coast affect external mastic in Newingreen?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Do you cover smaller places like Newingreen?
Yes, Newingreen is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you guarantee your work?
Yes. Every job comes with a 12-month guarantee.
Will the old sealant be removed?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Do you use backing rod?
Backing rod goes into deeper joints as a matter of course. It controls the depth and stops the sealant bonding to the back.
How long does external mastic take?
A typical job takes anything from a few hours to several days, depending on the building. Your quote will say how long we expect yours to take.
Can you seal joints between render and window frames?
Yes. Where different materials meet is one of the most common joints we seal. The sealant is chosen to bond to both sides.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
What happens on the day
You do not need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the job takes anything from a few hours to several days, depending on the building for a typical job. Somewhere like Newingreen needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Move anything stored near the joints
- Mention any tricky access
Getting a quote
Every job is quoted individually, so start by telling us what you need. Just phone 0345 464 0079 or send us an email with the details, and photos are welcome.
Read more
Nearby places to Newingreen
Other services in Newingreen
Landlord and commercial work in Newingreen
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Aftercare tips
Aftercare is simple:
- Clear growth from the base of walls and joints
- Tell anyone working on the walls about the movement joints
- Walk round the building once a year and look at the joints
- Act on the first splits you see
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.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
When something else is needed
To be straight with you, some problems need a different trade:
- Cracked brickwork or render that needs a builder or plasterer
- Movement that’s more than a sealant joint can take
- Render that’s blown, hollow or coming away
If you are not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
What we seal
- Façade panels
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
- Copings & trims
What affects the cost of external mastic
There’s no set price list, because no two jobs are the same. What we look at:
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
- How easy the joints are to reach
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will go through it with you.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- What’s wrong with the joints now
- Photos by email, if that’s easy
- Where the job is, and your postcode
- The type of property
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you’re ready, call 0345 464 0079 or drop us an email.
Signs you need external mastic in Newingreen
A lot of failed joints come down to preparation: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The sealant never bonds properly.
Keep an eye out for any of the following:
- Joints pointed up with cement by mistake
- Panel joints letting water in
- Failed seals between different materials
- Brick movement joints where the sealant has split
Schools such as Lympne Church of England Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Before booking anyone
- What insurance they hold
- What product goes in the joint
- Is the old sealant removed completely?
- How much experience the applicator has