Greater London · England
External Mastic in Ditton Hill
External mastic across Ditton Hill and nearby, with old sealant always removed completely and a 12-month guarantee.
- Sealant pulling away from one side of the joint
- Weathered mastic that no longer stretches
- Gaps where render, brick and frames meet
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Wash walls gently around the sealant
- Keep water from gutters off the wall
- Never let anyone fill a movement joint with mortar
- Leave the joints unpainted unless we’ve said otherwise
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
External mastic in Ditton Hill, done properly
For buildings in Ditton Hill, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. If you are dealing with sealant that has lost its bond to the brick or render and hard, crazed mastic that has stopped moving, we can help, on copings & trims, concrete & block and façade panels alike.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. In Ditton Hill, joints up high may need ladders or other access, which is worth talking through when you book.
All of our work is guaranteed for twelve months.
- Where
- Ditton Hill (KT6, KT9, KT7)
- Region
- Greater London
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Different surfaces, different methods
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
Towns and villages near Ditton Hill
Other services in Ditton Hill
Why deal with it now?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and does not last. In a flat in Ditton Hill, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
Why book with us
- An ARBOMaster approved applicator
- 20+ years of sealant experience
- A choice of colours where the product allows
- Any old sealant cut out fully, not covered over
See what affects the cost or our reviews.
What we do, step by step
There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The job generally takes a few hours for a handful of joints, longer for a whole elevation from start to finish. In Ditton Hill, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- Joint faces are cleaned back and primed if the sealant needs it.
- Backing rod sized to the joint goes in to set the depth.
- We apply the sealant, tool it and check the whole run.
How to prepare
- Clear the area around the work
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
Get a quote
For external mastic in Ditton Hill, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
Advice
What external mastic looks like in Ditton Hill
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. London terraces and converted houses often share gutters, downpipes and walls, so it’s worth agreeing who is responsible before work starts.
For site and facilities teams at buildings such as Long Ditton Infant and Nursery School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. In the older streets around Church of St Mary, the joints between older walls, newer extensions and the roofline need a sealant that can move.
Ditton Hill is about 1 mile south-west of Surbiton, in Greater London. Anywhere in KT6, our applicators can take on external mastic. Our area takes in 764 places across Greater London, from the larger towns to small villages. Our London page covers work nearby.
Work in KT6, KT9 and KT7 is quoted and booked the same way as anywhere else. We cover properties on Love Lane, Herne Road and King's Road and the roads around them. If you’re just outside Ditton Hill, we cover Long Ditton (1 mile north), Hook (1 mile south), Seething Wells (1 mile north), Hinchley Wood (1 mile west) and Thames Ditton (1 mile north-west). Within a short drive, we also cover London (13 miles north-east), City of Westminster (12 miles north-east), Marylebone (12 miles north-east), Kensington (10 miles north-east), St Pancras (13 miles north-east) and Shoreditch (14 miles north-east).
Around Ditton Hill
Typical jobs here are in homes near Shrewsbury House School, Stokes Field and Southborough High School. Ditton Hill’s nearest station is Surbiton station, roughly 1 mile north-east. Nearby you’ll also find Chessington Castle Hill (1.8 miles south-east) and Metropolitan Police Mounted Branch Museum (1.8 miles north-west). Green spaces nearby include The Wood and Kingston Hill Road area.
When to call us in Ditton Hill
UV, rain and frost all age exterior sealant. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
The most common problems we see are:
- Rain getting behind render or cladding at a joint
- Hard, crazed mastic that has stopped moving
- Gaps where render, brick and frames meet
- Rigid filler in a joint that should flex
Rented homes near Surbiton station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Before booking anyone
- Whether the sealant suits the joint
- How much experience the applicator has
- The length of the guarantee
- Whether all the old sealant comes out first
Ditton Hill: your questions answered
Is parking a problem for a job in Ditton Hill?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Do you work for landlords with property near Surbiton station?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or email us and tell us about the property, and we will send you a clear quote.
Can new sealant go over the old?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Do you take out the old sealant first?
Yes, always, and completely. New sealant won’t bond properly to old, so the joint is cleaned back first.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints, and we clear up when we are done.
Do you use backing rod?
Backing rod controls the sealant depth and keeps it off the back of the joint. That way it bonds to the two sides only and can stretch.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area.
What sealant 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 will explain our choice.