Surrey · England
External & façade joints in West Horsley, Surrey
External mastic across West Horsley and nearby, with old sealant always removed completely.
- Water getting into walls through failed joints
- Joints pointed up with cement by mistake
- Weathered mastic that no longer stretches
West Horsley: your questions answered
Do you cover West Horsley for external mastic?
Yes, West Horsley is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
I let a flat near Horsley station. Can you help?
Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
What information do you need?
A short description and the location, with pictures by email if possible. We’ll ask anything else we need to know.
Do you work at height?
It depends on the building. Send us pictures and a rough idea of the height and we will confirm how they can be reached safely.
Where is Mr Mastic based?
We work from Crawley. We cover West Horsley and the rest of Surrey, along with the rest of our area.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
Do you do commercial work?
Yes. We can plan bigger jobs in stages to suit the site.
How often do external joints need resealing?
That depends on the wall, the weather and the movement. Look for splits, hardening or edges coming away, and reseal at that point.
About our external mastic in West Horsley
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. We pick a colour that sits well with the wall. We work on copings & trims, façade panels and concrete & block, and common reasons people get in touch are sealant pulling away from one side of the joint and rigid filler in a joint that should flex.
Homes around West Horsley range from older cottages to newer houses, with walls and rooflines of every type. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
You’re covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Place
- West Horsley (KT24, GU23)
- Region
- Surrey
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why deal with it now?
Running new sealant over the old bead rarely lasts. The new layer can’t bond properly to old, weathered material, so the old joint is cut out fully first. In an older home around West Horsley, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Why us?
- We never seal over old sealant
- Homes, businesses and hotels
- We leave the area clean and tidy
- A 12-month guarantee on all work
Towns and villages near West Horsley
More services for West Horsley
West Horsley buildings and the weather
Historic houses like Hatchlands Park (about 1.6 miles south-west) are a reminder that the area around West Horsley 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. 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.
Schools such as The Raleigh School are buildings too, and its movement joints, gutters and trims need looking after like any other building’s. In the older streets around Church of St Mary the Virgin, old and new materials meet at the roofline and walls, which is where sealant earns its keep.
West Horsley is about 6 miles west of Leatherhead, in Surrey. We provide external mastic to householders, landlords and businesses in West Horsley, as part of our work across Surrey. West Horsley is one of 395 towns and villages in Surrey we cover for external mastic. We also work in Crawley, around 16 miles away.
Jobs for external mastic in KT24 and GU23 is quoted and booked the same way as anywhere else. You’ll find streets such as The Street, Woodside and Long Reach, and we cover them all. You will find West Horsley on the A246 and B2039, which makes it straightforward to reach. If you’re just outside West Horsley, we cover East Horsley (1 mile east), Ockham (2 miles north), East Clandon (2 miles south-west), Effingham (2 miles east) and Ripley (3 miles north-west). Larger places within reach include Guildford (6 miles west), Woking (6 miles north-west), Camberley (13 miles west), Epsom (9 miles north-east), Horley (14 miles south-east) and Redhill (13 miles east).
Local landmarks in West Horsley
Locally, jobs take us to homes and businesses close to Howard of Effingham School, The Barley Mow pub and The Forest and the Highlands. For rail, the closest station is Horsley station, roughly 0.7 miles east. Other landmarks nearby include Woking Community Hospital (5.2 miles north-west) and Send and Ripley History Society Museum (2.4 miles north-west). Not far away are St Martha's Hill and Papercourt Marshes.
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Check the sealant is paintable before painting near it
- Make sure movement joints are not pointed over
- Walk round the building once a year and look at the joints
- Show decorators and builders where the movement joints are
Look over the joints once a year, ideally after winter. Splits, gaps at the edges or plants in the joint are early warning signs.
Once a joint can’t move, the wall finds another way, normally as cracking in the brickwork or render nearby. Catch it early and you reduce the risk.
What happens on the day
You don’t need to clear the whole room or building, only the area right around the joints. We protect the rest, and the work takes a few hours to a few days, depending on the length of joint and the access for a typical job. Parking around West Horsley is normally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- 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.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Mention any tricky access
- Tell us about any previous sealing or DIY attempts
Ask for a quote
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll explain what’s involved and give you a clear quote.
Advice
Should I try it myself first?
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.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
When to call us in West Horsley
A lot of failed joints come down to preparation: dusty or wet faces, no primer where one was needed, or old sealant left in. The new sealant then lets go long before it should.
Look out for these signs:
- Failed sealant between panels on a façade
- Movement joints filled with mortar instead of sealant
- Weathered mastic that no longer stretches
- Movement joints with cracked, split or missing sealant
Rented homes near Horsley station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
What to look for in a quote
- How long the guarantee is
- Whether all the old sealant comes out first
- How the surfaces are prepared before sealing
- How long to leave it before use
How we quote for external mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- Mould in or behind the old joints
- Whether old sealant or filler has to be cut out
- How much there is to do
- How many rooms, windows or areas are involved
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Helping us quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- If someone has resealed it before
- Roughly how big the job is
- Photos by email, if that’s easy
- Access, such as stairs, a lift or height
If you’re in West Horsley and need external mastic, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Work for landlords, hotels and businesses
If you manage several properties in or around West Horsley, several properties can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.