Windsor and Maidenhead · England
External Mastic in Holyport
Professional external mastic in and around Holyport, with old sealant always removed completely and a 12-month guarantee.
- Weeds or debris growing in open joints
- Leaking joints around cladding and façade panels
- Joints where the bead has come unstuck
External mastic in Holyport, done properly
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. We work on render & cladding joints, brickwork movement joints and concrete & block, and the jobs we see most are cracked joints where brick meets render or frames and joints where the bead has come unstuck.
External sealant needs dry, clean surfaces, so work around Holyport is planned for dry weather. Tell us about access to all sides of the building, including outbuildings and garages.
Every job is covered by our one-year guarantee, wherever you are in Windsor and Maidenhead.
- Location
- Holyport (SL6)
- Region
- Windsor and Maidenhead
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Can I do it myself?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Keep soil, plants and ivy away from the joints
- Check external joints each spring
- Tell anyone working on the walls about the movement joints
- Fix overflowing gutters above sealed joints
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
Water getting behind cladding or render can go unnoticed for a long time. By the time there’s a damp patch, the damage can be well established.
Different surfaces, different methods
Cladding and façade panels
Panel systems often rely on sealant between and around the panels. Each joint gets a sealant that suits the panel and its movement.
Render joints
Render is weaker at the surface than brick, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Also near Holyport
Other services in Holyport
Work for landlords, hotels and businesses
We also work for property managers and facilities teams in Holyport and across Windsor and Maidenhead. We can quote a run of properties together, and we are fully insured.
Landlords and agents in Holyport can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.
Holyport buildings and the weather
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Dorney Court (about 2.2 miles east) nearby, there’s older building stock in the area around Holyport as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Rented homes near Maidenhead station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets. Historic houses such as Dorney Court, about 2.2 miles east, show how far back building around Holyport goes, and older homes nearby need a sealant that suits their walls.
Holyport is about 2 miles south of Maidenhead, in Windsor and Maidenhead. We provide external mastic to homeowners, landlords and businesses in Holyport and the surrounding area. 57 places in Windsor and Maidenhead are on our list, large and small. There’s also a page for Reading, roughly 12 miles from Holyport.
All of SL6 is within our area for external mastic, from the main roads to the quietest streets. Whether your property is on Ascot Road, Holyport Street and Hearne Drive or anywhere close by, we can help. If you’re just outside Holyport, we cover Moneyrow Green (1 mile south), Stud Green (1 mile west), Touchen-end (1 mile south-west), Paley Street (2 miles south-west) and Braywoodside (2 miles south-west). Within a short drive, we also cover Windsor (4 miles east), North Ascot (5 miles south), Cookham (4 miles north), Furze Platt (3 miles north), Dedworth (3 miles east) and Broomhall (8 miles south-east).
Around Holyport
In Holyport, that means homes and buildings near Holyport College, The Belgian Arms and Ockwells Park and the streets around them. The nearest railway station is Maidenhead station, roughly 1.8 miles north. A little further out are St Mark's Hospital (2.5 miles north-west) and Windsor Castle (4.9 miles east). Not far away are Weycock Hill and Taplow Lake.
Questions from Holyport
Is Holyport within the area you cover?
Yes, Holyport is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you do external mastic in Holyport?
Yes, Holyport is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job.
How long should I leave it?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint before we leave.
Can you seal joints between two different materials?
Yes. Joints between dissimilar materials are a big part of external work. We use a flexible sealant suited to both surfaces with primer where required.
Will the old sealant be removed?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Is there any odour?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
Why is there a gap in my brick wall?
It’s a deliberate gap that lets the wall expand and contract without cracking. It’s sealed with a flexible sealant, not mortar.
Can you quote for more than one area?
Of course. Doing several areas at once is normally more efficient.
Quotes for external mastic in Holyport
We quote each job individually. These are the things that affect it:
- When we can work, for business premises
- The size of the job
- Whether there’s mould to deal with
- How much old sealant there is and how hard it is to remove
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
Asking for a quote
To help us quote quickly, please include:
- Where the property is
- How we’d reach the joints
- Whether it’s a home or a business
- What’s wrong with the joints now
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To arrange one, phone 0345 464 0079 or drop us an email.
When to call us in Holyport
Buildings move more than people expect. Clay bricks expand slightly over their life, concrete and block shrink, and everything moves with temperature and wet. All of that ends up in the joint sealant.
The most common problems we see are:
- Movement joints with cracked, split or missing sealant
- Sealant pulling away from one side of the joint
- Hard, crazed mastic that has stopped moving
- Failed seals between different materials
Schools such as Holyport CofE Primary School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s.
What your quote should include
- Which sealant they’ll use, and why
- How the surfaces are prepared before sealing
- Is VAT in the price?
- What happens if the job turns out different
What happens on the day
Good joint work is mostly preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to several days, depending on the building. Somewhere like Holyport needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First, the joints are inspected and the access agreed.
- 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.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Mention any parking rules near the property
- Let us know about stairs, lifts or work at height
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.