Windsor and Maidenhead · England
External Mastic in Lake End
External mastic across Lake End and nearby, with old sealant always removed completely and a 12-month guarantee.
- Joints with sealant missing in places
- Damp patches traced to an open external joint
- Leaking joints around cladding and façade panels
External mastic in Lake End
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, and when it fails, the wall takes the strain and water finds a way in. We work on render & cladding joints, façade panels and copings & trims, and the jobs we see most are movement joints with cracked, split or missing sealant and movement joints filled with mortar instead of sealant.
In a village or hamlet like Lake End, older cottages and farm buildings often stand in the open, so walls and rooflines take the full force of wind and rain. Joints on those walls need a sealant that moves with the building and stays in place.
Every job comes with our one-year guarantee, wherever you are in Windsor and Maidenhead.
- Where
- Lake End (SL4)
- Region
- Windsor and Maidenhead
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Common questions in Lake End
Is Lake End in your area for external mastic?
Yes, Lake End is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we will send you a clear quote.
Do you work for landlords with property near Burnham station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Do I have to be there?
We need access to the joints, so we will agree that with you when we book. Indoors, that usually means someone at home.
What is backing rod for?
That’s backing rod, a closed-cell foam. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
Do you seal joints where cladding meets other materials?
Yes. Joints between dissimilar materials are a big part of external work. The sealant is chosen to bond to both sides.
Do you take out the old sealant first?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
What’s an expansion joint in brickwork?
A movement joint is a planned break in the wall that absorbs expansion and shrinkage. It’s sealed with a flexible sealant, not mortar.
How often do external joints need resealing?
That depends on the wall, the weather and the movement. Signs to watch for are cracking, hardening and gaps at the edges.
Surface by surface
Brickwork movement joints
Clay brickwork grows slightly over its life and moves with the weather. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Cladding and façade panels
If the façade has a specified sealant, that’s what we use, or one the system allows. Tell us what the building has when you get in touch.
Also near Lake End
Other services in Lake End
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Avoid pressure-washing directly into sealant joints
- Ask before painting over external sealant
- Walk round the building once a year and look at the joints
- Fix overflowing gutters above sealed joints
Make sure anyone working on the wall later knows where the movement joints are. They must stay as flexible joints, never rendered or pointed over.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established so early resealing is worth it.
Leave it or put it right?
Running new sealant over the old bead rarely lasts. The new layer cannot bond properly to old, weathered material, so the old joint is cut out fully first. Where a wall is exposed, as many are in small places like Lake End, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
What it costs depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Why Lake End clients choose us
- You choose the colour before work begins
- Over 20 years’ experience
- Homes, businesses and hotels
- Rated 4.9 stars on Google
Take a look at what affects the cost or our reviews.
What external mastic looks like in Lake End
Historic houses like Dorney Court (about 0.6 miles south-west) are a reminder that the area around Lake End 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. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as Cippenham Infant School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. Letting a property close to Burnham station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies. Homes close to Church of St James include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
Lake End is about 2 miles west of Slough, in Windsor and Maidenhead. Lake End gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. 57 places in Windsor and Maidenhead are on our list, large and small. You can also see our page for Reading, about 14 miles away.
Here we cover the SL4 postcode area for external mastic. You’ll find streets such as Lake End Road and Ashford Lane, and we cover them all. If you’re just outside Lake End, we cover Dorney (1 mile south-east), Dorney Reach (1 mile west), Huntercombe (1 mile north-east), Cippenham (1 mile east) and Burnham (1 mile north). Larger places within reach include Maidenhead (3 miles west), Windsor (3 miles south-east), Boyn Hill (3 miles west), North Ascot (6 miles south), Cookham (4 miles north-west) and Furze Platt (4 miles north-west).
Landmarks near Lake End
We work in homes and buildings around The Pineapple Public House, Haymill Valley and The E-Act Burnham Park Academy. The closest station to Lake End is Burnham station, roughly 1.2 miles north-east of the centre. Nearby you’ll also find Windsor Castle (3.1 miles south-east) and The History On Wheels Museum (1.6 miles south-east). Not far away are Taplow Lake and Bray Pit.
When something else is needed
We will always be straight with you, so here’s what new sealant will not do:
- Movement that’s more than a sealant joint can take
- Failed render or damaged cladding panels
- Rising or penetrating damp from elsewhere in the wall
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think before you book.
Joints and surfaces we work on
- Façade panels
- Render & cladding joints
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Joints between brick and frames
What affects the quote in Lake End
Call for a quick quote. What matters most is:
- The number of rooms or windows
- Access and height
- Whether there’s mould to deal with
- The product the joint needs
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Any previous sealing or DIY work
- How we’d reach the joints
- What’s wrong with the joints now
- Photos by email, if that’s easy
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
DIY sealant or a professional job?
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so just mention it when you contact us.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
How it works
When we arrive, we start by going over the job with you, so you know exactly what we are doing. Surfaces next to the work are protected before any work begins. The work generally takes a few hours to a few days, depending on the length of joint and the access. Somewhere like Lake End needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- First, the joints are inspected and the access agreed.
- 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.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Mention if the joints have been sealed before
- Move anything stored near the joints
Get a quote
For external mastic in Lake End, call 0345 464 0079 or email us. Tell us what the problem is and where, and we will agree the price before any work begins.