Greater London · England
External Mastic in Eel Pie Island
External mastic for Eel Pie Island, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Sealant pulling away from one side of the joint
- Hard, crazed mastic that has stopped moving
- Water getting into walls through failed joints
For landlords and businesses
If you manage several properties in or around Eel Pie Island, several properties can be quoted together. Just tell us the addresses and what each one needs.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
How we handle external mastic in Eel Pie Island
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two where a rigid filler would soon crack. Typical jobs include failed sealant between panels on a façade and gaps where render, brick and frames meet, on render & cladding joints, façade panels and brickwork movement joints.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so one failed joint can cause damp for more than one household. For a flat in Eel Pie Island, check the lease for who looks after the outside.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.
- Place
- Eel Pie Island (TW1, TW10, TW2)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What we can’t put right
Some problems need a builder, plumber or other trade rather than us:
- Cracking across the wall rather than at a joint
- Damp that isn’t coming from the joint
- Render that’s blown, hollow or coming away
If you are not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Where we work in Eel Pie Island
- Façade panels
- Copings & trims
- Joints between brick and frames
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
The process
The work is kept neat and contained to the area we are working on. Expect the work to take a few hours to a few days, depending on the length of joint and the access, and we tell you how long to leave it before we go. For a job in Eel Pie Island, parking and access are the things to plan: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
To get a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before work begins.
Related advice
Places near Eel Pie Island
What else we do in Eel Pie Island
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and doesn’t last. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble for homes in Eel Pie Island.
Doing several joints on one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear quote for the lot.
Why us?
- Old sealant always removed completely
- Every job guaranteed for a year
- Anti-fungal sanitary silicone in wet areas
- We agree the colour with you first
See what affects the cost or our reviews.
DIY versus a professional finish
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How the job changes by surface
Copings and trims
Copings expand and contract through the day, so the joints need a sealant that stays flexible.
Render joints
Water behind render can lead to blown patches. A sound joint keeps the render dry behind and helps it last.
Eel Pie Island questions
Can you help a landlord with a rental near Twickenham station?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Is Eel Pie Island in your area for external mastic?
Yes. Our work covers London and the South East, and Eel Pie Island is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job.
Should I point up the gap in my brickwork?
No. Cement or mortar can’t stretch. If it has already been filled, we can generally cut it out and reseal it.
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.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Can you do several jobs on one visit?
Yes. Just list everything you need and you’ll get one quote.
How much does external mastic cost in Eel Pie Island?
It depends on the job, so we quote each one individually. To get one, phone 0345 464 0079 or drop us an email with a short description of the job.
Is the work guaranteed?
Yes, for a year. If anything is not right with the work within the year, let us know and we will sort it.
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. Our tips:
- Check external joints each spring
- Ask before painting over external sealant
- Tell anyone working on the walls about the movement joints
- 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. When it finally shows inside, the joint may have been open for years.
Eel Pie Island buildings and the weather
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Richmond House (about 0.2 miles west) nearby, there’s older building stock in the area around Eel Pie Island as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Rented homes near Twickenham station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. Eel Pie Island is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. If you look after a building such as St Mary's Church of England Primary School, its movement joints, gutters and trims need looking after like any other building’s.
Eel Pie Island is about 1 mile east of Twickenham, in Greater London. Homes, rented property, offices and hotels in Eel Pie Island can book us for external mastic, old or new, large or small. The work is guaranteed for a year. 764 places in Greater London are on our list. Our London page covers work nearby.
Work in TW1, TW10 and TW2 is quoted and booked the same way as anywhere else. Whether your property is on Oak Lane, Sion Road and Bell Lane or anywhere close by, our applicators can take on the job. Eel Pie Island is on the A305 and A310, so it’s easy for us to get to with everything needed for external mastic. Other places close to Eel Pie Island include Twickenham (1 mile west), Strawberry Hill (1 mile south-west), Ham (1 mile south-east), Petersham (1 mile east) and St Margarets (1 mile north). Further out, we also cover London (11 miles east), City of Westminster (9 miles north-east), Marylebone (9 miles north-east), Kensington (6 miles north-east), St Pancras (11 miles north-east) and Shoreditch (12 miles north-east).
What’s near Eel Pie Island
We work in homes and buildings around St Catherine's School, Orleans Park School and Marble Hill Park and the streets around them. Eel Pie Island has its own railway station: Twickenham station. Nearby you’ll also find South Middlesex Hospital (1 mile north-west) and Eel Pie Island Museum (under half a mile north). The countryside around Eel Pie Island includes Kew Gardens Lake and Ham Lands.