Windsor and Maidenhead · England
Maidenhead External Mastic
We cover Maidenhead for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Joints with sealant missing in places
- Damp patches traced to an open external joint
- Sealant pulling away from one side of the joint
About our external mastic in Maidenhead
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it. If you’re dealing with hard, crazed mastic that has stopped moving and plants rooting in failed movement joints, we can help, whatever the surface.
In a town like Maidenhead, older houses with traditional gutters sit alongside newer estates with uPVC rooflines and rendered walls. All of those joints move, so they need a flexible sealant rather than a rigid filler.
We stand behind the work with a one-year guarantee, so you are not left on your own once the job is done.
- Location
- Maidenhead (SL6)
- Wider area
- Windsor and Maidenhead
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Keep water from gutters off the wall
- Look over the joints every year, ideally after winter
- Get split or bare joints resealed while the damage is small
- Do not let climbing plants root in the sealant
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
A joint that has stopped moving pushes the movement elsewhere, normally as cracking in the brickwork or render nearby. Resealing it early helps prevent that.
What happens if it’s left?
Pointing a movement joint with mortar might seem a neat fix, but it stops the joint moving. The wall then cracks somewhere else. The correct repair is a flexible sealant with the right backing. Around Maidenhead, failed sealant lets water into hidden places, such as under the floor, behind a panel or into a wall. Whatever the joint, failed sealant only gets worse.
The cost reflects the work involved, not a rough estimate. That’s why we ask a few questions first.
Why us?
- Approved under the ARBOMaster scheme
- Homes, businesses and hotels
- 4.9 on Google from 180+ five-star reviews
- 12-month guarantee on every job
Read what affects the cost or our reviews.
What the job involves on each surface
Concrete and blockwork
The face of concrete or block is often dusty, so cleaning and priming matter. A primer goes on where the product requires one.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so its sealant has to stay flexible.
Towns and villages near Maidenhead
More services for Maidenhead
How we quote for external mastic
There’s no set price list. The quote depends on:
- Whether the work is at height
- How many rooms, windows or areas are involved
- When we can work, for business premises
- Any mould that needs treating
Combining jobs into one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. We will give you a clear price for the lot.
What we need to know
Photos help, but a description is a good start. Please mention:
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it has been sealed before
- The type of property
- Any access issues, like height or stairs
We do not publish a price list. Instead, we give you a clear price for your job. To arrange one, phone 0345 464 0079 or email us.
How the visit works
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and clear up. It usually takes a few hours to a few days, depending on the length of joint and the access. In Maidenhead, parking is rarely complicated, though it helps to know about driveways or restrictions, and let us know if the work is upstairs, in a flat or up high outside.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Where the joints are inside, avoid wetting them before we arrive
- Mention any tricky access
- Mention any leaks or damp you’ve noticed
Ask for a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. Whenever you’re ready, ring 0345 464 0079 or send us an email.
Read more
Maidenhead: your questions answered
Can you do external mastic in Maidenhead?
Yes, Maidenhead is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Do you work for landlords with property near Maidenhead station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just ring 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Can you match the colour of my brickwork?
The sealant colour is picked to suit the wall, so the joint sits quietly in the wall. There’s a wide choice of exterior colours.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. Once we’ve agreed the job, you do not need to watch us work.
Do you seal joints where cladding meets other 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.
Is there a guarantee?
Yes. All our work carries a 12-month guarantee.
Is there any odour?
There can be a smell while the sealant cures. Ventilation helps.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
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.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
Maidenhead buildings and the weather
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Dorney Court (about 3 miles south-east) are a reminder that the area around Maidenhead has older buildings as well as new. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
If you look after a building such as Claires Court Schools, its movement joints, gutters and trims need looking after like any other building’s. In the older streets around All Saints' Church, old and new materials meet at the roofline and walls, which is where sealant earns its keep. For landlords with property near Maidenhead station, split movement joints are easy to miss on a rental until damp shows inside.
Maidenhead is about 27 miles west of London, in Windsor and Maidenhead. We provide external mastic to householders, landlords and businesses in Maidenhead. Across Windsor and Maidenhead, we cover 57 places, and Maidenhead is one of them. You can also see our page for Reading, roughly 12 miles from Maidenhead.
Every address in SL6 is covered for external mastic, from the main roads to the quietest streets. That includes homes and businesses on High Street Mall, High Street and Laggan Square. With the A4 and A308 close by, Maidenhead is simple for us to get to for external mastic. Other places close to Maidenhead include Boyn Hill (1 mile south-west), Furze Platt (1 mile north), Cox Green (1 mile south-west), Pinkneys Green (1 mile north-west) and Bray Wick (2 miles south-east). We also work in nearby towns such as Windsor (5 miles south-east), North Ascot (7 miles south), Dedworth (5 miles south-east), Broomhall (10 miles south-east), South Ascot (9 miles south) and Old Windsor (8 miles south-east). As one of the bigger places in Windsor and Maidenhead, Maidenhead has homes, rented property and businesses of every kind.
Near you in Maidenhead
Around Maidenhead, our work takes us to homes and buildings near Boyne Hill CofE Infant and Nursery School, Desborough College and The Windsor Castle pub and the streets around them. Maidenhead’s nearest station is Maidenhead station, about 0.5 miles south-east. Nearby you’ll also find The Reitlinger Bequest Museum (1.2 miles east) and St Mark's Hospital (0.6 miles west). Not far away are Weycock Hill and Taplow Lake.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
If you manage several properties in or around Maidenhead, several properties can go on one quote. Just tell us the addresses and what each one needs.