Windsor and Maidenhead · England
External Mastic in Dorney Reach
Movement joints in Dorney Reach need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Water getting into walls through failed joints
- Sealant pulling away from one side of the joint
- Leaking joints around cladding and façade panels
Surface by surface
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. That movement goes into the joint, so the sealant in it must stay soft and stretchy.
Copings and trims
Coping joints that leak let water straight down into the wall. Resealing them is a small job that protects a lot.
External mastic for homes and businesses in Dorney Reach
As ARBOMaster approved applicators, we choose exterior sealants to suit the joint and the surfaces. Porous or awkward surfaces are primed where the sealant needs it. Common call-outs are for leaking joints around cladding and façade panels and plants rooting in failed movement joints, on joints between brick and frames, façade panels and brickwork movement joints.
In a village or hamlet like Dorney Reach, older cottages and farm buildings often stand in the open, where walls and rooflines take the weather head on. Joints on those walls need a sealant that moves with the building and stays in place.
We stand behind the work with a 12-month guarantee, so you are not left on your own once the job is done.
- Location
- Dorney Reach (SL6)
- Wider area
- Windsor and Maidenhead
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What happens if it’s left?
Water gets in through a failed movement joint and can run behind render or cladding. Dealing with it early keeps the repair to the joint, instead of the wall and finishes around it. Where a wall is exposed, as many are in small places like Dorney Reach, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you are not sure whether it needs doing, ring 0345 464 0079 or email us for an honest opinion and a quote.
Why Dorney Reach customers choose us
- Over 20 years’ experience
- Neat joints and a tidy finish
- A 12-month guarantee on all work
- Colour agreed with you before work begins
Read our cost guide and what customers say.
How it works
When we arrive, we start by going over the job with you. Surfaces next to the work are protected before we start. The work usually takes a few hours for a handful of joints, longer for a whole elevation. In a small place like Dorney Reach, 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 walking round the building and agreeing the joints and the access.
- 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.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Mention if the joints have been sealed before
- Move anything stored near the joints
- For indoor joints, keep the area dry beforehand if you can
Get a quote
Need a quote? Please phone 0345 464 0079 or send us an email with a few details. We’ll explain what we’d do and give you a clear price before any work starts.
Related advice
Quotes for external mastic in Dorney Reach
You will get a clear quote before we start. It takes into account:
- Any working-time requirements on site
- The amount of work
- Which sealant suits the joint
- The old material and how stubborn it is
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we will go through it with you.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- The address or postcode of the job
- Any previous sealing or DIY work
- Roughly how big the job is
- If it’s domestic, commercial or a hotel
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Fix overflowing gutters above sealed joints
- Keep soil, plants and ivy away from the joints
- Show decorators and builders where the movement joints are
- Leave the joints unpainted unless we have said otherwise
Do not paint over the new sealant unless we’ve said the product is paintable. Paint can crack on a flexible joint and spoil the finish.
Act while the splits are small. Then it’s a straightforward cut-out and reseal before water has had years to get in.
Do you need external mastic in Dorney Reach?
Poor preparation causes many early failures: dusty or wet faces, no primer where one was needed, or old sealant left in. The sealant never bonds properly.
Most people get in touch after spotting something like this:
- Weeds or debris growing in open joints
- Hard, crazed mastic that has stopped moving
- Gaps where render, brick and frames meet
- Movement joints with cracked, split or missing sealant
If you let a flat or house near Taplow station, outside joints that have cracked can let damp into a rental, so check them between lets.
Before you book anyone
- Are they insured?
- Whether they seal over old material or remove it
- How much experience the applicator has
- The length of the guarantee
Dorney Reach: your questions answered
Is Dorney Reach within the area you cover?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Taplow station?
Yes. We work for letting agents and landlords as well as householders, and several properties can go on one quote. Just call 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear quote.
Is the work guaranteed?
Yes. Each job is guaranteed for twelve months, wherever you are.
Do the sealants smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
Can you reach joints on upper floors?
That depends on how high the joints are and the ground below. Low-level joints are straightforward; for higher work, tell us about the building and we will confirm what’s needed.
What information do you need?
Tell us what needs doing and where, plus photos if you have them. We will ask anything else we need to know.
Can I add another job to the visit?
Yes. Several rooms, windows or areas can go on one quote.
Do I have to be there?
If the work is inside, we need someone to let us in. Once we have agreed the job, you don’t need to watch us work.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Nearby places to Dorney Reach
What else we do in Dorney Reach
Dorney Reach buildings and the weather
London and the South East are among the drier parts 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 0.6 miles south-east) nearby, there’s older building stock in the area around Dorney Reach as well as newer homes. Where a home is older, older brick and stone need a sealant that suits them, at the right joint depth.
Homes close to Church of St James include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep. Schools such as Dorney School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Dorney Reach is about 2 miles south-east of Maidenhead, in Windsor and Maidenhead. Whether you’re in the middle of Dorney Reach or further out, we cover external mastic for every kind of property. Dorney Reach is one of 57 places in Windsor and Maidenhead we cover for external mastic. There’s also a page for Reading, roughly 13 miles from Dorney Reach.
Work in SL6 works the same way as everywhere else we cover. If you need external mastic at a property on Meadow Way, Harcourt Close and Oak Stubbs Lane or anywhere close by, we can help. Nearby, we also carry out external mastic in Lake End (1 mile east), Bray (1 mile west), Dorney (1 mile east), Huntercombe (1 mile north-east) and Taplow (2 miles north). Larger places within reach include Windsor (3 miles south-east), Boyn Hill (3 miles west), North Ascot (6 miles south), Cookham (4 miles north-west), Furze Platt (3 miles north-west) and Broomhall (8 miles south).
Near you in Dorney Reach
Locally, jobs take us to homes and businesses close to Braywick Park, The E-Act Burnham Park Academy and The Pineapple Public House, among other places. The nearest railway station is Taplow station, about 1.1 miles north. Other landmarks nearby include The Reitlinger Bequest Museum (1.5 miles north-west) and Windsor Castle (3.6 miles south-east). The countryside around Dorney Reach includes Bray Pit and Taplow Lake.