Windsor and Maidenhead · England
External Mastic in Eton
Movement joints in Eton need attention? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Old sealant gone brittle and cracked
- Movement joints filled with mortar instead of sealant
- Water getting into walls through failed joints
External mastic in Eton
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible exterior sealant takes up that movement where mortar or filler would crack. Typical jobs include failed seals between different materials and joints with sealant missing in places, across façade panels, copings & trims and concrete & block.
Outside joints can only be sealed when they’re dry, so work in Eton is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Where
- Eton (SL4)
- Region
- Windsor and Maidenhead
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Questions from Eton
Can you help a landlord with a rental near Windsor & Eton Riverside station?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or email us with the details for a clear quote.
Do you cover Eton for external mastic?
Yes. Our work covers London and the South East, and Eton is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job.
When will the joints need doing again?
There’s no fixed answer: sunny, exposed elevations and busy joints wear faster. Check them each year and reseal when they split or harden. Our work comes with a 12-month guarantee.
What colours does the sealant come in?
Exterior sealants are made in a range of colours, from greys and browns to whites and stone shades. We choose the closest to your brick or render so the joint does not draw the eye.
Where do you work from?
We are based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
What information do you need?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply ring 0345 464 0079 or drop us an email.
Can you do several jobs on one visit?
Yes. Just list everything you need and we will quote it together.
Do you guarantee your work?
Yes: twelve months. If anything isn’t right with the work within the year, let us know and we’ll sort it.
What else we do in Eton
Walls and rooflines in Eton
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Windsor Castle (about 0.7 miles south) are a reminder that the area around Eton 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.
If you let a flat or house near Windsor & Eton Riverside station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. Schools such as Eton Porny CofE First School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
Eton is about 1 mile north-east of Windsor, in Windsor and Maidenhead. From the centre of Eton to the outskirts, we cover external mastic for every kind of property. Across Windsor and Maidenhead, we cover 57 places, Eton among them. You can also see our page for Reading, roughly 16 miles from Eton.
Work in SL4 works the same way as everywhere else we cover. External mastic is available to properties on High Street, Eton Square and Common Lane and the roads around them. With the A332 and B3022 close by, Eton is simple for us to get to. Other places close to Eton include Clewer (1 mile south-west), Eton Wick (1 mile west), Windsor (1 mile south-west), Boveney (2 miles west) and Dedworth (2 miles south-west). Within a short drive, we also cover Maidenhead (6 miles west), Boyn Hill (6 miles west), North Ascot (6 miles south-west), Cookham (7 miles north-west), Furze Platt (6 miles north-west) and Broomhall (7 miles south).
Near you in Eton
We work in homes and buildings around The Goswells, St George's School and Christopher Hotel. For rail, the closest station is Windsor & Eton Riverside station, about 0.5 miles south of the centre. Nearby you’ll also find Museum of Eton Life (within half a mile south) and Windsor Castle (0.7 miles south). The countryside around Eton includes Taplow Lake and Bray Pit.
Quotes for external mastic in Eton
We do not publish a price list. What we look at:
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
- Which sealant suits the joint
- Access and height
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
What we need to know
Before you ask for a quote, have a think about:
- Pictures of the joints, sent by email
- Roughly how big the job is
- Whether it has been sealed before
- Any access issues, like height or stairs
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we will take it from there.
What we’re called out for in Eton
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, and it tears off the sides.
Common reasons people contact us include:
- Damp patches traced to an open external joint
- Hard, crazed mastic that has stopped moving
- Plants rooting in failed movement joints
- Rigid filler in a joint that should flex
Homes close to Church of Saint John the Evangelist include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
What to look for in a quote
- Whether VAT is included
- How long the guarantee is
- Whether they’re fully insured
- Which sealant they’ll use, and why
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Deal with leaking gutters that soak the joints below
- Clear growth from the base of walls and joints
- Tell anyone working on the walls about the movement joints
- Act on the first splits you see
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They must stay as flexible joints, never rendered or pointed over.
Gaps, plants or missing sealant in a joint are worth getting looked at. Earlier resealing means a smaller job and a better result.
How it works
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to several days, depending on the building. For a village or hamlet like Eton, the journey is planned in advance: 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.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- The exterior sealant is applied, tooled and checked along its length.
Before we arrive
- Tell us if parking is tricky
- Mention any tricky access
- For indoor joints, keep the area dry beforehand if you can
Get a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Read more
Different surfaces, different methods
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
Concrete and blockwork
Concrete faces can be dusty and porous, so preparation is key. We prime where the sealant needs it before the bead.
Can I do it myself?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Why deal with it now?
Resealing a run of joints in one go is normally better than patching one at a time. They’ve weathered the same way, and access only has to be arranged once. Around Eton, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
Leaving a failed joint normally makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, call 0345 464 0079 or email us for an honest opinion and a quote.
Why book with us
- Arbo and Everbuild products
- Anti-fungal silicone where joints get wet
- Sealant colour chosen to suit
- We never seal over old sealant