Windsor and Maidenhead · England
External Mastic in Beggar's Bush
Sealing brickwork movement joints, render, cladding and façade joints for Beggar's Bush, backed by a one-year guarantee. Ask us for a quote.
- Movement joints with cracked, split or missing sealant
- Damp patches traced to an open external joint
- Moss and dirt in joints with no sealant left
External mastic in Beggar's Bush, done properly
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. We pick a colour that sits well with the wall so the joint does not stand out. If you have cracked joints where brick meets render or frames and moss and dirt in joints with no sealant left, we can put it right.
Outside joints can only be sealed when they’re dry, so work in Beggar's Bush is booked around the forecast. Tell us about access to all sides of the building, including outbuildings and garages.
Every job is covered by a 12-month guarantee, wherever you are in Windsor and Maidenhead.
- Where
- Beggar's Bush (SL5)
- Wider area
- Windsor and Maidenhead
- Cover
- A year, on every job
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
When it isn’t the sealant
It helps to know what we cannot do:
- Cracking across the wall rather than at a joint
- Movement that is more than a sealant joint can take
- Failed render or damaged cladding panels
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Surfaces we seal
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Façade panels
Leave it or put it right?
A failed movement joint lets water into the wall and can run behind render or cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. In a small place like Beggar's Bush, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
The cost depends on the amount of work, how hard the old material is to remove and access to the work. We give a clear quote before any work starts.
What you get with us
- More than 20 years in sealant work
- A sealant colour to suit the surroundings
- White, clear, grey or another colour, product permitting
- Arbo and Everbuild products
Read what affects the cost and our reviews.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Look over the joints every year, ideally after winter
- Have failed joints looked at early
- Don’t let climbing plants root in the sealant
- Make sure movement joints aren’t pointed over
Have a quick look at the joints each spring. Watch for splits, edges coming away or growth in the joint.
Leave a failed movement joint and water keeps getting into the wall. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.
Your questions about external mastic in Beggar's Bush
Is Beggar's Bush in your area for external mastic?
Yes, Beggar's Bush is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing, and we’ll send you a clear quote.
Do you work for landlords with property near Sunningdale station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Do you use backing rod?
That is backing rod, a closed-cell foam. It stops the sealant going in too deep and bonding to three sides so it can flex with the joint.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
How often do external joints need resealing?
There’s no fixed answer: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Every job carries our 12-month guarantee.
How much does external mastic cost in Beggar's Bush?
We do not 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. We agree the price before any work begins.
Which products do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll explain our choice.
More services for Beggar's Bush
Beggar's Bush buildings and the weather
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like St Leonard's Hill (about 4.3 miles north) are a reminder that the area around Beggar's Bush has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
For an older house near a landmark such as Church of St Michael and All Angels, older walls, gutters and the joints where extensions meet them need a flexible sealant. For site and facilities teams at buildings such as Holy Trinity CofE Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Beggar's Bush is about 4 miles west of Egham, in Windsor and Maidenhead. If you need external mastic in Beggar's Bush, please phone 0345 464 0079 or email us for a quick quote. We’re based in Crawley and cover Windsor and Maidenhead. Our Windsor and Maidenhead coverage runs to 57 places, and Beggar's Bush is one of them. We also work in Reading, around 15 miles away.
Postcode districts we cover here for external mastic: SL5. External mastic is available to properties on Kiln Lane, Sandy Lane and London Road and the roads around them. Neighbouring places we cover for external mastic include Blacknest (1 mile north-east), Sunninghill (1 mile west), Cheapside (1 mile north-west), Ascot (1 mile west) and Woodside (2 miles north-west). Within a short drive, we also cover Maidenhead (9 miles north-west), Windsor (5 miles north), Boyn Hill (8 miles north-west), Cookham (11 miles north), Furze Platt (10 miles north-west) and Dedworth (5 miles north).
Near you in Beggar's Bush
In Beggar's Bush, that means homes and buildings near Sunningdale School, Charters School and The Belvedere Arms, among other places. For rail, the closest station is Sunningdale station, about 1 mile south of the centre. Other landmarks nearby include Heatherwood Hospital (2.1 miles west). Green spaces nearby include Virginia Water Lake and Gracious Pond.
Should I try it myself first?
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.
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, then guaranteed for a year.
Common problems we fix in Beggar's Bush
Some movement joints have been pointed up with mortar. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
Look out for these signs:
- Water getting into walls through failed joints
- Joints where the bead has come unstuck
- Panel joints letting water in
- Brick movement joints where the sealant has split
If you let a flat or house near Sunningdale station, split movement joints are easy to miss on a rental until damp shows inside.
Before you book anyone
- Who turns up on the day
- What guarantee comes with the work
- Whether you can choose the colour
- Are they insured?
How we quote for external mastic
The price is agreed before any work begins. It takes into account:
- Whether there’s mould to deal with
- Working hours on commercial sites
- The number and length of the joints
- Which sealant suits the joint
Doing several joints on one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Helping us quote
Photos help, but a description is a good start. Please mention:
- The type of property
- A few pictures by email, if you can
- The address or postcode of the job
- How many joints, rooms or windows are involved
We do not publish a price list. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or send us an email.
How it works
The work is kept neat and contained to the joints we are treating, so you can carry on as normal. Expect the work to take anything from a few hours to several days, depending on the building, and we explain the cure time before we leave. For a village or hamlet like Beggar's Bush, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- The faces are brushed clean and primed where the product requires it.
- We fit closed-cell backing rod to control the depth.
- We apply the sealant, tool it and check the whole run.
Getting ready for the visit
- Mention any tricky access
- On commercial sites, let us know about site rules
- Plan for the work area to be out of bounds to pets and children
How to get a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand, and we will take it from there.