Wokingham · England
Sindlesham External Mastic
External mastic in Sindlesham from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Joints pointed up with cement by mistake
- Failed sealant between panels on a façade
- Sealant pulling away from one side of the joint
What we can’t put right
Some problems need a builder, plumber or other trade rather than us:
- Walls that need new movement joints cut into them
- Cracking across the wall rather than at a joint
- Structural movement, which needs a surveyor or engineer
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Brickwork movement joints
- Façade panels
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
- Concrete & block
External mastic in Sindlesham, done properly
A movement joint is only as good as its depth. Backing rod controls how deep the sealant goes and keeps it off the back of the joint, leaving it bonded to two faces so it can move with the wall. If you have weathered mastic that no longer stretches and failed sealant between panels on a façade, we can put it right, whatever the surface.
Around Sindlesham, older buildings can be stone, brick or timber-framed, many with extensions added later. The joints where those materials meet are the weak points, and they need the right sealant at the right depth.
Big or small, it’s backed by our one-year guarantee in Sindlesham and across Wokingham.
- Place
- Sindlesham (RG41)
- Region
- Wokingham
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What happens if it’s left?
Sealing over the top of old mastic does not hold for long. New sealant doesn’t bond well to old, weathered sealant, so the old joint is cut out fully first. Around Sindlesham, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
What you get with us
- More than 20 years in sealant work
- Homes, businesses and hotels
- Every job guaranteed for a year
- Fully insured
Questions from Sindlesham
Is Sindlesham within the area you cover?
Yes, Sindlesham is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Do you cover Sindlesham for external mastic?
Yes, Sindlesham is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear price.
Do you work at height?
It depends on the height and the site. Low-level joints are straightforward; for higher work, tell us about the building and we will confirm what’s needed.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
I rent my home. Can I book you?
Yes, but check with your landlord or agent first. Many landlords are glad to have it sorted.
Will there be a smell?
Possibly a little. Any smell clears as the sealant cures, and ventilation helps.
Is it OK to fill a movement joint with cement?
No. Cement or mortar cannot stretch. If it has already been filled, we can normally cut it out and reseal it.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
What affects the quote in Sindlesham
Some jobs are bigger than they look, and some smaller. The main factors:
- The number of rooms or windows
- How much old sealant there is and how hard it is to remove
- Whether the work is at height
- When we can work, for business premises
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
What we need to know
To make quoting easier, please include:
- Whether it has been sealed before
- The problem you’ve noticed
- Whether it’s a home or a business
- Where the job is, and your postcode
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
The process
At the end, we look at the finished work together and explain the cure time. The visit itself usually takes anything from a few hours to several days, depending on the building, depending on how much there is to do. For a village or hamlet like Sindlesham, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by checking each joint, agreeing the ones to redo and how we will reach them.
- Old sealant and any debris are cut and raked out.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Let us know if you’ve seen damp or leaks
- Keep pets and children clear of the area while we work
- Clear items away from the joints we are working on
Getting a quote
If you’re in Sindlesham and need external mastic, phone 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Read more
Other services in Sindlesham
Common problems we fix in Sindlesham
The wrong product in a moving joint is a classic cause. A high-modulus or general-purpose sealant can be too rigid for a busy joint, so it pulls away from the edges.
Most people get in touch after spotting something like this:
- Movement joints with cracked, split or missing sealant
- Panel joints letting water in
- Moss and dirt in joints with no sealant left
- Old sealant gone brittle and cracked
Homes close to Church of St Catherine include some older properties, and old and new materials meet at the roofline and walls, which is where sealant earns its keep.
What your quote should include
- What preparation is included
- Who turns up on the day
- What happens if the job turns out different
- Is VAT in the price?
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Sindlesham buildings and the weather
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Winnersh station? Then outside joints that have cracked can let damp into a rental, so check them between lets. Managing a site like Bearwood Primary School? Then larger buildings have long runs of movement joint that eventually need resealing.
Sindlesham is about 2 miles north-west of Wokingham, in Wokingham. Whether you are in the middle of Sindlesham or further out, external mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Sindlesham is one of 35 towns and villages in Wokingham where we work for external mastic.
We cover every part of the RG41 postcode area for external mastic. Whether your property is on Mayfield Mews, May Fields and New Road or anywhere close by, we can help. If you’re just outside Sindlesham, we cover Winnersh (1 mile north), Woosehill (1 mile south-east), Emmbrook (1 mile east), Wokingham (2 miles south-east) and Woodley (2 miles north). We also work in nearby towns such as Reading (4 miles north-west), Crowthorne (5 miles south-east), Newtown (3 miles north-west), Coley Park (5 miles west), Twyford (4 miles north) and Charvil (4 miles north).
Local landmarks in Sindlesham
In Sindlesham, that means homes and buildings near The Walters Arms, Maiden Erlegh Local Nature Reserve and The Forest School and the streets around them. For rail, the closest station is Winnersh station, about 0.7 miles north-east of the centre. Other landmarks nearby include Berkshire Library & Museum of Freemasonry (within half a mile north-west) and Wokingham Hospital (1.9 miles south-east). Green spaces nearby include Holt Copse & Joel Park and Sonning Hill.
How to look after the new joints
A little care helps the new joints last. We recommend:
- Have failed joints looked at early
- Keep water from gutters off the wall
- Tell anyone working on the walls about the movement joints
- Check external joints each spring
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges and let water in behind.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years.