Windsor and Maidenhead · England
External & façade joints in Boveney, Windsor and Maidenhead
We cover Boveney for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Panel joints letting water in
- Water getting into walls through failed joints
- Joints where the bead has come unstuck
How we quote for external mastic
We do not publish a price list, because jobs vary so much. What we look at:
- How many areas need sealing
- The old material and how stubborn it is
- Whether the work is at height
- The size of the job
The cost reflects the work involved, not guesswork. That is why we ask a few questions first and give you a clear quote before we start.
What we need to know
Photos by email are helpful but not essential. Try to tell us:
- Roughly how big the job is
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
- The address or postcode of the job
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
External mastic in Boveney, done properly
Short cuts in external joints show up within a season or two. Overfilled joints, missing backing rod and sealant laid over old sealant rarely last long. We strip the joint back and start again. Typical jobs include hard, crazed mastic that has stopped moving and sealant pulling away from one side of the joint, on façade panels, render & cladding joints and copings & trims.
Older homes in small places like Boveney 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.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or send us an email.
- Location
- Boveney (SL4)
- Region
- Windsor and Maidenhead
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
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Can I do it myself?
A careful DIYer can reseal a simple joint, 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.
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.
Walls and rooflines in Boveney
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Dorney Court (about 1.2 miles north-west) are a reminder that the area around Boveney has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
For landlords with property near Windsor & Eton Central station, outside joints that have cracked can let damp into a rental, so check them between lets. Schools such as Homer First School and Nursery are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Boveney is about 1 mile north-west of Windsor, in Windsor and Maidenhead. We carry out external mastic for householders, landlords and businesses in Boveney. Our area takes in 57 places across Windsor and Maidenhead, large and small. For nearby work, see our Reading page (14 miles or so).
Here we cover the SL4 postcode area for external mastic. Neighbouring places we cover for external mastic include Eton Wick (1 mile north-east), Dedworth (1 mile south), Clewer (1 mile east), Oakley Green (1 mile south-west) and Windsor (1 mile south-east). Further out, we also cover Maidenhead (4 miles north-west), Boyn Hill (4 miles west), North Ascot (5 miles south), Cookham (6 miles north-west), Furze Platt (5 miles north-west) and Broomhall (7 miles south).
Around Boveney
Typical jobs here are in homes near Shepherds Hut pub, Sutherland Grange and The Windsor Boys' School and the streets around them. Boveney’s nearest station is Windsor & Eton Central station, about 1.7 miles east. A little further out are Windsor Castle (1.9 miles east) and King Edward VII Hospital (1.9 miles south-east). For a walk, there’s Bray Pit and Taplow Lake.
The process
Most of a good job is in the preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it usually takes anything from a few hours to several days, depending on the building. Somewhere like Boveney 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.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Mention any parking rules near the property
- Plan for the work area to be out of bounds to pets and children
How to get a quote
Need a quote? Please phone 0345 464 0079 or drop us an email and tell us about the job. We’ll explain what we’d do and give you a clear price before any work starts.
Related advice
Boveney: your questions answered
Do you cover smaller places like Boveney?
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.
I let a flat near Windsor & Eton Central station. Can you help?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
What is a movement joint?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access.
Will the old sealant be removed?
Yes, always, and completely. New sealant won’t bond properly to old, so the joint is cleaned back first.
Can new sealant go over the old?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
Do you have insurance?
Yes. We’re fully insured for every job we do.
Is the work guaranteed?
Yes, for a year. If anything isn’t right with the work within the year, let us know and we’ll sort it.
Different surfaces, different methods
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best in all weathers.
Cladding and façade panels
If the façade has a specified sealant, that’s what we use, or one the system allows. Send us any details you have about the façade.
What we cannot put right
In fairness, there are a few things sealant won’t fix:
- Cracking across the wall rather than at a joint
- Structural movement, which needs a surveyor or engineer
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
What we seal
- Copings & trims
- Render & cladding joints
- Concrete & block
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
Leave it or put it right?
It often makes sense to reseal all the failing joints on an elevation together. They’ve weathered the same way and it means sorting access once. Where a wall is exposed, as many are in small places like Boveney, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Why choose Mr Mastic in Boveney
- Tidy, careful work
- Full insurance on every job
- Sanitary silicone with an anti-fungal additive in wet areas
- You choose the colour before work begins
Take a look at what affects the cost or customer reviews.
Signs you need external mastic in Boveney
Buildings move more than people expect. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. All of that ends up in the joint sealant.
These are the problems we are asked about most:
- Cracked joints where brick meets render or frames
- Moss and dirt in joints with no sealant left
- Sealant that has lost its bond to the brick or render
- Brick movement joints where the sealant has split
In the older streets around St Mary Magdalene's Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Questions to ask before you book
- What the cure time is
- What happens if they find a problem under the old sealant
- The length of the guarantee
- Are they insured?