Surrey · England
External & façade joints in Horley, Surrey
External mastic for Horley, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Water getting into walls through failed joints
- Weathered mastic that no longer stretches
- Gaps where render, brick and frames meet
External mastic in Horley
Getting the depth right is half the job. 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. We work on render & cladding joints, joints between brick and frames and brickwork movement joints, and the jobs we see most are joints pointed up with cement by mistake and gaps where render, brick and frames meet.
Garage door frames, porches and roofline trims are all part of external work in a town like Horley. Each joint between different materials moves in its own way, so the sealant has to cope with that.
Whatever the size of the job, it’s backed by our 12-month guarantee in Horley and across Surrey.
- Place
- Horley (RH6)
- Wider area
- Surrey
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
If you manage several properties in or around Horley, jobs at different addresses can be quoted together. Send us the addresses and the work at each, 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.
The process
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours to a few days, depending on the length of joint and the access, and the area is left clean. For a job in Horley, we need access to where the work is and somewhere nearby to park. For outside work, let us know about side access, gates and any upper-floor joints.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Clear the area around the work
- For business premises, tell us about site rules or sign-in
- Tell us about any previous sealing or DIY attempts
How to get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. Whenever you’re ready, phone 0345 464 0079 or send us an email.
Advice
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Ask before painting over external sealant
- Get split or bare joints resealed while the damage is small
- Keep high-pressure jets off the joints
- Make sure movement joints aren’t pointed over
Avoid pressure-washing straight into the joints. High-pressure water can lift the edges over time.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established.
Why act early in Horley
Resealing a run of joints in one go is usually better than patching one at a time. They’ve weathered the same way. Gaps in sealant and mould in the bead never get better on their own, and in a busy household in Horley they spread with every shower and every downpour. Now is the easy time to put it right.
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or send us an email and we’ll talk you through it.
Why Horley clients choose us
- Experience in homes, commercial sites and hotels
- Rated 4.9 stars on Google
- Approved under the ARBOMaster scheme
- We agree the colour with you first
Common questions in Horley
What guarantee comes with external mastic in Horley?
Every job comes with our 12-month guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Do you work for landlords with property near Horley station?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
How long does external mastic last?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. A yearly look will tell you when they need doing. Every job carries our one-year guarantee.
Are you fully insured?
Yes, we’re fully insured for every job we do.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Do you seal joints where cladding meets other materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
Will the old sealant be removed?
Yes, every time. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Do the sealants smell?
Possibly a little. It fades as the sealant cures, and ventilation helps.
What the job involves on each surface
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. Where one has been mortared, we cut it out and reseal it with sealant.
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. Their movement joints are sealed over backing rod with a flexible sealant.
Should I try it myself first?
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 does not work out, we can still put it right.
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Towns and villages near Horley
What else we do in Horley
What affects the quote in Horley
You’ll get a clear quote before we start. It takes into account:
- How much there is to do
- Any working-time requirements on site
- How easy the joints are to reach
- How many rooms, windows or areas are involved
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 play a part.
What to tell us for a quote
To make quoting easier, let us know:
- Whether it has been sealed before
- What’s wrong with the joints now
- Any access issues, like height or stairs
- A few pictures by email, if you can
Every job is quoted individually, so the first step is telling us about yours. Simply call 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
Horley buildings and the weather
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Horley Infant School, larger buildings have long runs of movement joint that eventually need resealing. For landlords with property near Horley station, split movement joints are easy to miss on a rental until damp shows inside. Homes close to St Wilfrid's Church include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Horley is about 5 miles north of Crawley, in Surrey. Homes, rented property, offices and hotels in Horley is covered for external mastic. The work is guaranteed for a year. Our Surrey coverage runs to 395 places, Horley among them.
Work in RH6 works the same way as everywhere else we cover. Whether your property is on Station Road, High Street and Church Road or anywhere close by, we can help. You’ll find Horley on the A23 and B2036, which makes it straightforward to reach with everything needed for external mastic. We also cover Hookwood (1 mile south-west), Fernhill (2 miles south-east), Burstow (2 miles south-east), Smallfield (2 miles east) and Shipley Bridge (2 miles south-east). Further out, we also cover Epsom (12 miles north), Redhill (4 miles north), Ewell (13 miles north), Reigate (4 miles north), Caterham (8 miles north-east) and Dorking (8 miles north-west). Being one of Surrey’s larger places, Horley has homes, rented property and businesses of every kind.
Local landmarks in Horley
We work in homes and buildings around The Bull pub and Oakwood School and the streets around them. The closest station to Horley is Horley station, roughly 0.8 miles south-east of the centre. Nearby you will also find Reigate Castle (4.5 miles north) and East Surrey Hospital (2.8 miles north). Green spaces nearby include Reigate Heath.