Windsor and Maidenhead · England
Bray External Mastic
Sealing brickwork movement joints, render, cladding and façade joints in Bray, with a 12-month guarantee on every job. Ask us for a quote.
- Movement joints with cracked, split or missing sealant
- Sealant pulling away from one side of the joint
- Weathered mastic that no longer stretches
External mastic in Bray, done properly
A movement joint is a deliberate break that lets a wall expand and contract. 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. Common call-outs are for joints with sealant missing in places and failed sealant between panels on a façade, across concrete & block, joints between brick and frames and façade panels.
Outside joints can only be sealed when they’re dry, so work in Bray is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
You get a one-year guarantee, the same in Bray as everywhere else we work.
- Place
- Bray (SL6)
- Wider area
- Windsor and Maidenhead
- Guarantee
- A year, on every job
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
When it is not the sealant
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Cracked brickwork or render that needs a builder or plasterer
- Subsidence or other structural problems
- Render that is blown, hollow or coming away
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think before you book.
What we seal
- Concrete & block
- Copings & trims
- Render & cladding joints
- Façade panels
- Brickwork movement joints
- Joints between brick and frames
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
What we do, step by step
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours to a few days, depending on the length of joint and the access. In a small place like Bray, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at every joint and agree a colour to suit the wall.
- Failed sealant is removed back to clean, sound faces.
- 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
- Let us know if you’ve seen damp or leaks
- Mention any sign-in or site rules at work premises
- Clear the area around the work
How to get a quote
Need a quote? Please ring 0345 464 0079 or send us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Why deal with it now?
Low-modulus sealants stretch easily, so they put less strain on the joint edges. That matters on brick, render and concrete, which can be weaker at the face. A stiffer product can damage the joint edge as it fails. In a small place like Bray, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Why book with us
- Rated 4.9 stars on Google
- An ARBOMaster approved applicator
- Colour agreed with you before any work starts
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at how sealant jobs are priced and our reviews.
When to call us in Bray
Sunlight, wet weather and frost wear exterior sealant down. Over the years it hardens, cracks on the surface and loses its give, so the next time the wall moves, it splits or pulls away.
Keep an eye out for any of the following:
- Rain getting behind render or cladding at a joint
- Joints with sealant missing in places
- Cracked joints where brick meets render or frames
- Hard, crazed mastic that has stopped moving
If you live in an older home near St Michael's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Questions to ask before booking
- How long the guarantee is
- How the colour is chosen
- What the cure time is
- What the quote includes, VAT included or not
Bray questions
Is Bray in your area for external mastic?
Yes. We work across London and the South East, and Bray is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear quote.
Do you cover smaller places like Bray?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you seal joints where cladding meets other materials?
Yes. Different materials move at different rates, so a flexible sealant is needed where they meet. The sealant is matched to both sides.
Is it OK to fill a movement joint with cement?
No, not where the gap is a movement joint. Filling it with mortar defeats its purpose and can lead to cracking. A flexible sealant is the right fill.
How much does external mastic cost in Bray?
Size, access and the old material all affect the cost. Ask us for a quote.
Do you use backing rod?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only so it can flex with the joint.
Do you work at height?
It depends on the building. Send us photos and a rough idea of the height and we’ll confirm how they can be reached safely.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that normally means someone at home.
Walls and rooflines in Bray
Historic houses like Dorney Court (about 1.3 miles east) are a reminder that the area around Bray 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. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Taplow station change hands often, and split movement joints are easy to miss on a rental until damp shows inside. Schools such as Dorney School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Bray is about 2 miles south-east of Maidenhead, in Windsor and Maidenhead. If you need external mastic in Bray, it’s easy to get a quote: please ring 0345 464 0079 or send us an email. We’re based in Crawley and cover Windsor and Maidenhead. Bray is one of 57 towns and villages in Windsor and Maidenhead where we work. There’s also a page for Reading, about 13 miles away.
We cover every part of the SL6 postcode area for external mastic. Streets in the area include High Street, Old Mill Lane and Beaufort Place. Nearby, we also carry out external mastic in Dorney Reach (1 mile east), Lake End (1 mile east), Taplow (2 miles north), Dorney (2 miles east) and Hitchambury (2 miles north-east). Larger places within reach include Windsor (4 miles south-east), North Ascot (6 miles south), Cookham (4 miles north), Furze Platt (3 miles north-west), Dedworth (3 miles south-east) and Broomhall (9 miles south).
Local landmarks in Bray
Around Bray, our work takes us to homes and buildings near Braywick Park, The Fat Duck pub and Desborough College. The nearest railway station is Taplow station, about 1.3 miles north-east of the centre. Other landmarks nearby include The Reitlinger Bequest Museum (1.1 miles north) and Windsor Castle (4.3 miles south-east). For a walk, there’s Bray Pit and Taplow Lake.
Places near Bray
What else we do in Bray
Quotes for external mastic in Bray
There’s no set price list. The quote depends on:
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
- The product the joint needs
- Any working-time requirements on site
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
What we need to know
To help us quote quickly, let us know:
- If someone has resealed it before
- How many joints, rooms or windows are involved
- Pictures of the joints, sent by email
- Where the property is
Every job is quoted individually. Simply ring 0345 464 0079 or email us and describe the job, and photos are welcome.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Fix overflowing gutters above sealed joints
- Keep high-pressure jets off the joints
- Leave the joints unpainted unless we have said otherwise
- Act on the first splits you see
Don’t let soil, plants or ivy build up against the new joints. Damp material against the sealant shortens its life.
A joint that has stopped moving pushes the movement elsewhere, normally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.