Surrey · England
External Mastic in Walton-on-Thames
We cover Walton-on-Thames for sealing brickwork movement joints, render, cladding and façade joints. Old material cut out, joints cleaned and sealed neatly.
- Joints where the bead has come unstuck
- Weathered mastic that no longer stretches
- Rigid filler in a joint that should flex
The process
We bring everything the job needs with us. Once we have agreed what’s being done, we protect the area and start. Most jobs take a few hours for a handful of joints, longer for a whole elevation. A visit in Walton-on-Thames needs access to the work and a place to park close by. If the job is outside, mention gates, side access and anything above ground floor.
- First, the joints are inspected and the access agreed.
- 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.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
- Mention any tricky access
Getting a quote
For a quick quote, get us on the phone, or email us if that’s easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Advice
External mastic for homes and businesses in Walton-on-Thames
We are ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Some surfaces need a primer before sealing, and we do not skip that step. Common call-outs are for joints pointed up with cement by mistake and joints with sealant missing in places, on concrete & block, copings & trims and joints between brick and frames.
Plenty of homes in a town like Walton-on-Thames have been extended, and the joint where new wall meets old is a classic place for water to get in. Getting the joint depth right matters as much as the sealant itself.
Whatever the size of the job, you get the same one-year guarantee.
- Location
- Walton-on-Thames (KT12, KT13)
- Wider area
- Surrey
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Landlords, agents and businesses in Walton-on-Thames
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Nearby places to Walton-on-Thames
Other services in Walton-on-Thames
DIY versus a professional finish
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.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What external mastic looks like in Walton-on-Thames
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. Historic houses like The Homewood (about 2.5 miles south) are a reminder that the area around Walton-on-Thames 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.
Rented homes near Walton-On-Thames station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. Managing a site like Walton Oak Primary School? Then its movement joints, gutters and trims need looking after like any other building’s.
Walton-on-Thames is about 9 miles north-east of Woking, in Surrey. Whether you are in the middle of Walton-on-Thames or further out, we cover external mastic for every kind of property. Our Surrey coverage runs to 395 places, Walton-on-Thames among them. For nearby work, see our London page.
Jobs for external mastic in KT12 and KT13 is quoted and booked the same way as anywhere else. We cover properties on High Street, Sidney Road and Stuart Avenue and the roads around them. You will find Walton-on-Thames on the A244 and B365, so it’s easy for us to get to. Other places close to Walton-on-Thames include Hersham (1 mile south), Shepperton (2 miles north-west), Burwood Park (2 miles south-west), Weybridge (2 miles south-west) and St George's Hill (2 miles south-west). Larger places within reach include Guildford (12 miles south-west), Woking (9 miles south-west), Camberley (14 miles west), Epsom (7 miles south-east), Redhill (14 miles south-east) and Ewell (7 miles east).
Landmarks near Walton-on-Thames
Around Walton-on-Thames, our work takes us to homes and buildings near RES Sixth Form College and Sunbury Park, among other places. The closest station to Walton-on-Thames is Walton-On-Thames station, about 0.8 miles south of the centre. Nearby you will also find Elmbridge Museum (2.2 miles south-east) and No. 2 New Zealand General Hospital (0.8 miles west). For a walk, there’s Kempton Park Reservoirs and Ferris Meadow Lake.
How we quote for external mastic
Every job gets its own quote. These are the things that affect it:
- Access and height
- Any working-time requirements on site
- How many areas need sealing
- How much old sealant there is and how hard it is to remove
What it costs depends on the amount of work, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts, so you know where you stand.
Asking for a quote
What to tell us when you ask for a quote:
- Any access issues, like height or stairs
- How many joints, rooms or windows are involved
- A few pictures by email, if you can
- The type of property
If you’re in Walton-on-Thames and need external mastic, ring 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Different surfaces, different methods
Concrete and blockwork
Big joints in concrete need careful depth control. We size the backing rod to the gap and keep the sealant to the right depth.
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.
Looking after it afterwards
After the cure time, these simple habits help:
- Wash walls gently around the sealant
- Never let anyone fill a movement joint with mortar
- Look over the joints every year, ideally after winter
- Have failed joints looked at early
Do not let soil, plants or ivy build up against the new joints. Anything that holds water against the joint wears it out sooner.
If you can see gaps, plants or bare sections in a joint, have it checked. Early work is quicker and leaves a better finish.
Your questions about external mastic in Walton-on-Thames
Can you help a landlord with a rental near Walton-On-Thames station?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can go on one quote. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Can you do external mastic in Walton-on-Thames?
Yes, Walton-on-Thames is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing, and we will send you a clear quote.
Are you fully insured?
Yes. We are fully insured, with over 20 years’ experience in sealant work.
Can you seal over the old sealant?
No, it will not last. It may look fine at first, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
What information do you need?
A short description and the location, with photos by email if possible. If we need more, we’ll ask.
Should I point up the gap in my brickwork?
No. Cement or mortar cannot stretch, so the joint stops doing its job. If it has already been filled, we can usually cut it out and reseal it.
How do you reach high-level joints?
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.
What we are called out for in Walton-on-Thames
Sometimes a movement joint was filled with mortar or a rigid filler by mistake. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
The problems people usually mention when they call are:
- Weathered mastic that no longer stretches
- Movement joints filled with mortar instead of sealant
- Plants rooting in failed movement joints
- Rain getting behind render or cladding at a joint
In the older streets around St John, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
Before you book anyone
- What happens if they find a problem under the old sealant
- The length of the guarantee
- Who turns up on the day
- Whether you can choose the colour