Slough · England
Poyle External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Poyle. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Panel joints letting water in
- Gaps where render, brick and frames meet
- Moss and dirt in joints with no sealant left
External mastic for homes and businesses in Poyle
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. If you have hard, crazed mastic that has stopped moving and water getting into walls through failed joints, we can put it right, on render & cladding joints, joints between brick and frames and façade panels alike.
External sealant needs dry, clean surfaces, so work around Poyle is planned for dry weather. Let us know about access to every wall, plus any garages or outbuildings.
Whatever the size of the job, you get the same one-year guarantee.
- Location
- Poyle (SL3)
- Region
- Slough
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
External mastic in Poyle: local notes
With historic houses such as Frogmore House (about 3.5 miles west) nearby, there’s older building stock in the area around Poyle as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. 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.
If you look after a building such as Pippins School, its movement joints, gutters and trims need looking after like any other building’s. If you live in an older home near Church of St Thomas, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Poyle is about 3 miles north of Staines-upon-Thames, in Slough. Whether you are in the middle of Poyle or further out, we cover external mastic for every kind of property. Poyle is one of 31 places in Slough we cover. There’s also a page for London, roughly 18 miles from Poyle.
Here we cover the SL3 postcode area for external mastic. We cover properties on Poplar Close, Sherborne Close and Bath Road. If you’re just outside Poyle, we cover Colnbrook (1 mile north-west), Horton (1 mile south-west), Brands Hill (1 mile west), Stanwell Moor (1 mile south-east) and Sunnymeads (2 miles west). We also work in nearby towns such as Slough (5 miles north-west), Cippenham (6 miles north-west), Chalvey (5 miles north-west), Britwell (6 miles north-west), Langley (3 miles north-west) and Upton (4 miles north-west).
Landmarks near Poyle
In Poyle, that means homes and buildings near Langley Grammar School, Arthur Jacob Nature Reserve and The Punch Bowl pub, among other places. For rail, the closest station is Heathrow Terminal 5 Rail station, about 1.2 miles south-east of the centre. Other landmarks nearby include Spelthorne Museum (3.2 miles south) and Windsor Castle (3.9 miles west). Green spaces nearby include Crane Meadows and Staines Reservoirs.
Also in Poyle
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
Poyle questions
Will you come out to Poyle?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
I let a flat near Heathrow Terminal 5 Rail station. Can you help?
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 any work starts.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Can you reach joints on upper floors?
It depends on the height and the site. Low-level joints are straightforward; for higher ones, send details and we will confirm the access.
Is the work guaranteed?
Yes. All our work carries our 12-month guarantee.
Why do you put foam in the joint first?
We fit closed-cell backing rod wherever the joint depth needs controlling. It controls the depth and stops the sealant bonding to the back, so the joint can move.
What does external mastic cost?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before work begins.
Signs you need external mastic in Poyle
Some movement joints have been pointed up with mortar by mistake. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Common reasons people contact us include:
- Leaking joints around cladding and façade panels
- Moss and dirt in joints with no sealant left
- Failed seals between different materials
- Weathered mastic that no longer stretches
Rented homes near Heathrow Terminal 5 Rail station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Comparing quotes
- What guarantee comes with the work
- What preparation is included
- How long to leave it before use
- Which sealant they’ll use, and why
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Loose or hollow render, which needs re-rendering
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
- Cracking across the wall rather than at a joint
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think before booking.
Surfaces we seal
- Copings & trims
- Joints between brick and frames
- Brickwork movement joints
- Concrete & block
- Façade panels
- Render & cladding joints
Landlords, agents and businesses in Poyle
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
What happens if it’s left?
Resealing a run of joints in one go is usually better than patching one at a time. Joints of the same age tend to fail together. Where a wall is exposed, as many are in small places like Poyle, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are unsure, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
What you get with us
- Sealant colour chosen to suit
- Full insurance on every job
- ARBOMaster approved applicator
- We agree the colour with you first
See our cost guide or customer reviews.
What the job involves on each surface
Joints between dissimilar materials
Wherever two materials meet, they move differently. A flexible sealant bridges the two so the movement is taken up.
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
What happens on the day
All our tools and materials come with us in the van. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours for a handful of joints, longer for a whole elevation. Somewhere like Poyle needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- 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.
Before we arrive
- Mention any leaks or damp you’ve noticed
- For business premises, tell us about site rules or sign-in
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
For a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before we start.