East Sussex · England
External & façade joints in Flimwell, East Sussex
Sealing brickwork movement joints, render, cladding and façade joints for Flimwell, backed by a one-year guarantee. Ask us for a quote.
- Water getting into walls through failed joints
- Moss and dirt in joints with no sealant left
- Gaps where render, brick and frames meet
Surface by surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
Joints between dissimilar materials
Each side of the joint may need its own preparation. We prepare both faces so the sealant bonds properly.
External mastic for homes and businesses in Flimwell
External mastic is a job where short cuts show quickly. Overfilled joints, missing backing rod and sealant laid over old sealant all tend to fail early. We strip the joint back and start again. We work on copings & trims, concrete & block and brickwork movement joints, and the jobs we see most are brick movement joints where the sealant has split and weathered mastic that no longer stretches.
Outside joints can only be sealed when they’re dry, so work in Flimwell is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
Every job comes with our one-year guarantee.
- Location
- Flimwell (TN5)
- Region
- East Sussex
- Guarantee
- One year on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Places near Flimwell
Also in Flimwell
FAQs for Flimwell
Is Flimwell in your area for external mastic?
Yes. Our work covers London and the South East, and Flimwell is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear price.
Can you help a landlord with a rental near Etchingham station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear price.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. We cover Flimwell and the rest of East Sussex.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint.
What information do you need?
Let us know what needs doing and where. If we need more, we’ll ask.
Do you seal joints where cladding meets other materials?
Yes. We cut out the old sealant, prepare both faces and reseal with a flexible exterior product. We pick a colour that works with both materials.
Walls and rooflines in Flimwell
Historic houses like Scotney Castle (about 3.1 miles north-west) are a reminder that the area around Flimwell 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. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you let a flat or house near Etchingham station, split movement joints are easy to miss on a rental until damp shows inside.
Flimwell is about 10 miles south-east of Royal Tunbridge Wells, in East Sussex. Every kind of property in Flimwell is covered for external mastic, old or new, large or small. Every job comes with our one-year guarantee. Flimwell is one of 289 places in East Sussex where we work for external mastic. There’s also a page for Crawley, about 28 miles away.
Here we cover the TN5 postcode area for external mastic. If you need external mastic at a property on High Street, London Road and Corner Farm Close or a nearby road, we can help. Being close to the B2087, Flimwell is simple for us to get to. Other places close to Flimwell include Stonecrouch (2 miles north-west), Ticehurst (2 miles west), Three Leg Cross (2 miles west), Cooper's Corner (2 miles south-east) and Bedgebury Cross (2 miles north). Within a short drive, we also cover Hastings (14 miles south), Bexhill-on-Sea (14 miles south), Hailsham (15 miles south-west), Crowborough (12 miles west), St Leonards (14 miles south) and Hastings Old Town (15 miles south-east).
What’s near Flimwell
For rail, the closest station is Etchingham station, about 3 miles south of the centre. Nearby you will also find Ticehurst House Hospital (2 miles west) and Finchcocks Musical Museum (3.5 miles north). Open spaces near Flimwell include Bewl Water.
How we quote for external mastic
There’s no set price list, because no two jobs are the same. What we look at:
- The type of sealant required
- Mould in or behind the old joints
- The old material and how stubborn it is
- How much there is to do
Combining jobs into one visit usually makes better use of the time than several visits. We’ll send you a clear quote for the lot.
What we need to know
To make quoting easier, let us know:
- Where the property is
- Photos by email, if that’s easy
- Roughly how big the job is
- The type of property
Want a quote for external mastic? Please call 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and give you a clear price before we start.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Leave the joints unpainted unless we’ve said otherwise
- Show decorators and builders where the movement joints are
- Deal with leaking gutters that soak the joints below
- Keep soil, plants and ivy away from the joints
Do not let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established.
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 a few hours for a handful of joints, longer for a whole elevation from start to finish. Somewhere like Flimwell needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We start by walking round the building and agreeing the joints and the access.
- Every bit of old sealant and any mortar or debris is cut out.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Mention any sign-in or site rules at work premises
- Try not to wet indoor joints just before the visit
Get a quote
We quote each job on its own, so the first step is telling us about yours. Just ring 0345 464 0079 or drop us an email with the details and send photos if you have them.
Read more
Why it’s worth doing now in Flimwell
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way. Where a wall is exposed, as many are in small places like Flimwell, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why Flimwell clients choose us
- We leave the area clean and tidy
- A 12-month guarantee on all work
- More than 20 years in sealant work
- Anti-fungal sanitary silicone in wet areas
Read what affects the cost or our reviews.
Common problems we fix in Flimwell
Joints sealed without backing rod, or far too deep, rarely last. If the sealant sticks to the back as well as the sides, it can’t stretch and tears as soon as the joint widens.
Signs it’s time to call us include:
- Plants rooting in failed movement joints
- Panel joints letting water in
- Gaps where render, brick and frames meet
- Joints with sealant missing in places
If you live in an older home near St Augustine's Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
What to look for in a quote
- How hidden problems are handled
- Whether all the old sealant comes out first
- Is VAT in the price?
- Who does the work, and how experienced they are