Slough · England
Wexham Street External Mastic
Professional external mastic in and around Wexham Street, with every bit of old sealant taken out first and a 12-month guarantee.
- Gaps where render, brick and frames meet
- Moss and dirt in joints with no sealant left
- Sealant that has lost its bond to the brick or render
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can go on one quote.
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together, and we’re fully insured for the work.
External mastic in Wexham Street
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, so it bonds to the two sides only and can stretch. If you have water getting into walls through failed joints and leaking joints around cladding and façade panels, we can help, whatever the surface.
Somewhere as small as Wexham Street, homes and farm buildings often face open ground, where walls and rooflines take the weather head on. Gutter joints and wall joints there need a sealant that can flex and stay put.
There’s a 12-month guarantee on every job.
- Place
- Wexham Street (SL2, SL3)
- Wider area
- Slough
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
We bring everything the job needs with us, so there’s nothing for you to buy. After a quick look at the joints together, the area is protected and the work begins. Most jobs take anything from a few hours to several days, depending on the building. In a small place like Wexham Street, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- The joint faces are cleaned and primed where the sealant needs it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- Try not to wet indoor joints just before the visit
- Keep pets and children clear of the area while we work
- Move anything stored near the joints
Ask for a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Advice
What happens if it’s left?
It often makes sense to reseal all the failing joints on an elevation together. Joints of the same age tend to fail together. Around Wexham Street, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Doing several joints on one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
What you get with us
- A choice of colours where the product allows
- Trusted Arbo and Everbuild sealants
- Tidy, careful work
- Old sealant always removed completely
See our cost guide or our reviews.
What we are called out for in Wexham Street
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
Signs it’s time to call us include:
- Moss and dirt in joints with no sealant left
- Failed sealant between panels on a façade
- Joints where the bead has come unstuck
- Movement joints filled with mortar instead of sealant
For an older house near a landmark such as St Andrew's Church Centre, older walls, gutters and the joints where extensions meet them need a flexible sealant.
What your quote should include
- Is the old sealant removed completely?
- How long to leave it before use
- Whether they’re fully insured
- How the colour is chosen
What sealant work can’t fix
We’ll always be straight with you, so here’s what new sealant will not do:
- Cracked brickwork or render that needs a builder or plasterer
- Render that’s blown, hollow or coming away
- Rising or penetrating damp from elsewhere in the wall
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before you book.
What we seal
- Brickwork movement joints
- Façade panels
- Copings & trims
- Render & cladding joints
- Joints between brick and frames
- Concrete & block
Wexham Street questions
I let a flat near Slough station. Can you help?
Yes. We work for landlords and agents as well as householders, and several properties can be quoted together. You can ring 0345 464 0079 or email us with the details for a clear quote.
Is Wexham Street within the area you cover?
Yes, Wexham Street is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Are you fully insured?
Yes. We’re fully insured, and we can confirm the details when we quote.
What is backing rod for?
Closed-cell backing rod sets the depth of the sealant and stops it sticking to the back of the joint. That way it bonds to the two sides only and can stretch.
Can you quote for more than one area?
Yes. Just list everything you need and you’ll get one quote.
Can new sealant go over the old?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
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.
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.
Outside joints around Wexham Street
With historic houses such as Windsor Castle (about 4.3 miles south) nearby, there’s older building stock in the area around Wexham Street as well as newer homes. In older buildings, 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.
For landlords with property near Slough station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. For site and facilities teams at buildings such as Khalsa Secondary Academy, larger buildings have long runs of movement joint that eventually need resealing.
Wexham Street is about 2 miles north-east of Slough, in Slough. Wexham Street gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across Slough, we cover 31 places, and Wexham Street is one of them. We also work in Reading, about 19 miles from Wexham Street.
Work in SL2 and SL3 is quoted and booked the same way as anywhere else. External mastic is available to properties on Larkings Lane, Hartley Close and Tubwell Road and the roads around them. Close by, we work in Stoke Poges (1 mile west), Wexham Court (1 mile south), Fulmer (1 mile north-east), George Green (2 miles south-east) and Iver Heath (2 miles east). Larger places within reach include Cippenham (3 miles south-west), Chalvey (3 miles south-west), Langley (3 miles south), Upton (3 miles south), Burnham (4 miles west) and Datchet (4 miles south).
Landmarks near Wexham Street
In Wexham Street, that means homes and buildings near The Plough Public House and The Stoke Poges School and the streets around them. Wexham Street’s nearest station is Slough station, about 2.3 miles south. A little further out are The Pavilions (4 miles east) and Windsor Castle (4.3 miles south). The countryside around Wexham Street includes Stoke Common.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
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.
Towns and villages near Wexham Street
Other services in Wexham Street
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Deal with leaking gutters that soak the joints below
- Walk round the building once a year and look at the joints
- Make sure movement joints are not pointed over
- Ask before painting over external sealant
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Once a joint can’t move, the wall finds another way, often as cracks near the joint. Catch it early and you reduce the risk.