Surrey · England
External Mastic in Thames Ditton
Movement joints in Thames Ditton need attention? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Failed sealant between panels on a façade
- Damp patches traced to an open external joint
- Rigid filler in a joint that should flex
External mastic in Thames Ditton, done properly
Getting the depth right is half the job. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. We work on façade panels, brickwork movement joints and joints between brick and frames, and the jobs we see most are brick movement joints where the sealant has split and weathered mastic that no longer stretches.
Homes around Thames Ditton range from older cottages to newer houses, with walls and rooflines of every type. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Thames Ditton (KT7)
- Wider area
- Surrey
- Guarantee
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Landlords, agents and businesses in Thames Ditton
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Places near Thames Ditton
What else we do in Thames Ditton
Common problems we fix in Thames Ditton
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the next time the wall moves, it splits or pulls away.
If you can see any of these, it’s time to have the joints looked at:
- Sealant pulling away from one side of the joint
- Joints pointed up with cement by mistake
- Failed seals between different materials
- Moss and dirt in joints with no sealant left
For landlords with property near Thames Ditton station, outside joints that have cracked can let damp into a rental, so check them between lets.
What your quote should include
- What the cure time is
- Which colour the sealant will be
- Whether they seal over old material or remove it
- The length of the guarantee
How to look after the new joints
A little care helps the new joints last. Our advice:
- Get split or bare joints resealed while the damage is small
- Keep soil, plants and ivy away from the joints
- Walk round the building once a year and look at the joints
- Check the sealant is paintable before painting near it
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
Once a joint cannot move, the wall finds another way, often as cracks near the joint. Resealing it early helps prevent that.
Different surfaces, different methods
Copings and trims
Metal and stone copings both move with temperature, so a flexible sealant suits them best year round.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. A flexible sealant bridges the two so neither cracks the other.
Questions from Thames Ditton
Is Thames Ditton in your area for external mastic?
Yes, Thames Ditton is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear quote.
Do you cover smaller places like Thames Ditton?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords and businesses?
Yes, regularly. We can quote for several properties at once, and between tenancies is a good time for the work.
Why is there a gap in my brick wall?
A vertical gap in a long brick wall is generally a movement joint. It gives the wall room to move, and it should be sealed with a flexible sealant.
How long does the job take?
That depends on how much there is to do, but most jobs take a few hours for a handful of joints, longer for a whole elevation. We’ll give you a better idea when we quote.
How much does external mastic cost in Thames Ditton?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or send us an email and tell us what needs doing and where.
How long should I leave it?
Cure times vary by product and the temperature. Before we leave, we’ll tell you the cure time.
How often do external joints need resealing?
It depends on the exposure, the movement and the product. Sealant is a maintenance item, so check the joints once a year.
DIY sealant or a professional job?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
How we quote for external mastic
We don’t publish a price list, because jobs vary so much. What we look at:
- Whether the work is at height
- How much there is to do
- Any mould that needs treating
- The old material and how stubborn it is
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
What to tell us for a quote
What to tell us when you ask for a quote:
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
- If someone has resealed it before
- Where the job is, and your postcode
There’s no standard price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To get started, ring 0345 464 0079 or email us.
How it works
On the day, there’s very little for you to do. Show us the job and we will take it from there. The job generally takes a few hours to a few days, depending on the length of joint and the access from start to finish. In a smaller place like Thames Ditton, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- We start by checking each joint, agreeing the ones to redo and how we’ll reach them.
- We cut out the failed sealant and rake out any dirt or growth.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- The new sealant, chosen to suit the brick or render, is applied and tooled to a neat finish.
Before we arrive
- On commercial sites, let us know about site rules
- Mention if the joints have been sealed before
- Mention any tricky access
Getting a quote
Getting a quote is simple: let us know what needs doing and where. A few pictures by email make the job easier to understand, and we will take it from there.
Read more
External mastic in Thames Ditton: local notes
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Hampton Court Palace (about 1 mile north) are a reminder that the area around Thames Ditton has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
In the older streets around Church of St. Nicholas, older walls, gutters and the joints where extensions meet them need a flexible sealant. If you look after a building such as Thames Ditton Junior School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Thames Ditton is about 1 mile west of Surbiton, in Surrey. We provide external mastic to homes and businesses in Thames Ditton and nearby. Our area takes in 395 places across Surrey, from the larger towns to small villages. Our London page covers work nearby, about 13 miles away.
We work across KT7 for external mastic and the streets around it. You’ll find streets such as High Street, Watts Road and Ditton Close, and we cover them all. With the A307 close by, Thames Ditton is easy for our applicators to reach for external mastic. We also cover the places around Thames Ditton: Weston Green (1 mile south-west), Long Ditton (1 mile east), Hinchley Wood (1 mile south), Seething Wells (1 mile east) and Molesey (1 mile north-west). Within a short drive, we also cover Guildford (14 miles south-west), Woking (12 miles south-west), Epsom (5 miles south-east), Redhill (13 miles south-east), Ewell (4 miles south-east) and Egham (10 miles west).
Landmarks near Thames Ditton
Around Thames Ditton, our work takes us to homes and buildings near Esher College, George and Dragon pub and Shrewsbury House School. Thames Ditton has its own railway station: Thames Ditton station. Well-known places in the area include Metropolitan Police Mounted Branch Museum (0.8 miles west) and Tolworth Hospital (2 miles east). Open spaces near Thames Ditton include The Wood and The Lake.