Surrey · England
External & façade joints in Fernhill, Surrey
Sealing brickwork movement joints, render, cladding and façade joints for homes and businesses in Fernhill and across Surrey. Fully insured, ARBOMaster approved and guaranteed for a year.
- Panel joints letting water in
- Plants rooting in failed movement joints
- Failed seals between different materials
What happens on the day
On the day, there’s very little for you to do. Point us to the joints and we will get on with it. The work itself takes a few hours to a few days, depending on the length of joint and the access from start to finish. Somewhere like Fernhill needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- Backing rod sized to the joint goes in to set the depth.
- The exterior sealant is applied, tooled and checked along its length.
Getting ready for the visit
- Clear the area around the work
- Mention any sign-in or site rules at work premises
- Keep children and pets away from the work area
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that is easy.
Related advice
External mastic in Fernhill
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two where mortar or filler would crack. We are often asked to deal with water getting into walls through failed joints and joints pointed up with cement by mistake, across brickwork movement joints, copings & trims and concrete & block.
Somewhere as small as Fernhill, homes and farm buildings often face open ground, so walls and rooflines take the full force of wind and rain. Gutter joints and wall joints there need a sealant that can flex and stay put.
A one-year guarantee comes as standard, so you are covered after we’ve gone.
- Place
- Fernhill (RH6)
- Region
- Surrey
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why it’s worth doing now in Fernhill
A failed movement joint lets water into the wall, behind render and cladding. Resealing early keeps the job to the joint itself, instead of the wall and finishes around it. Around Fernhill, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Why choose Mr Mastic in Fernhill
- A 12-month guarantee on all work
- White, clear, grey or coloured to suit, where the product allows
- Experience in homes, commercial sites and hotels
- Anti-fungal silicone where joints get wet
Take a look at how sealant jobs are priced or our reviews.
When it isn’t the sealant
We’ll always be straight with you, so here’s what new sealant won’t do:
- Walls that need new movement joints cut into them
- Movement that is more than a sealant joint can take
- Rising or penetrating damp from elsewhere in the wall
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think before booking.
What we seal
- Render & cladding joints
- Joints between brick and frames
- Façade panels
- Copings & trims
- Brickwork movement joints
- Concrete & block
Quotes for external mastic in Fernhill
Call for a quick quote. What matters most is:
- The type of sealant required
- How easy the joints are to reach
- When we can work, for business premises
- How many areas need sealing
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
What we need to know
When you contact us, these details help:
- The problem you’ve noticed
- Where the job is, and your postcode
- Any previous sealing or DIY work
- The rough size of the job
For external mastic in Fernhill, ring 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.
Surface by surface
Render joints
Render has movement joints and stop beads that need sealing. They’re resealed in a sealant that suits the render.
Brickwork movement joints
People sometimes point up a brick movement joint by mistake. If that’s happened, we rake it out and reseal it properly.
Landlord and commercial work in Fernhill
We also work for property managers and facilities teams in Fernhill and across Surrey. Several sites can go on one quote.
For anyone letting property in or around Fernhill, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
FAQs for Fernhill
Can you help a landlord with a rental near Gatwick Airport station?
Yes. We work for landlords and letting agents as well as householders, and several properties can be quoted together. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Is Fernhill in your area for external mastic?
Yes, Fernhill is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing.
Do you do commercial work?
Yes. We have worked for hotels, offices and other businesses and we are fully insured.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Do you use backing rod?
The foam is closed-cell backing rod. It keeps the sealant at the right depth and bonded to the sides only, which would stop it stretching.
Is it worth trying it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Places near Fernhill
What else we do in Fernhill
Fernhill buildings and the weather
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Gatwick Airport station? Then split movement joints are easy to miss on a rental until damp shows inside. Schools such as Oakwood School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. If you live in an older home near Church of St Bartholomew, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Fernhill is about 2 miles south-east of Horley, in Surrey. Every kind of property in Fernhill can book us for external mastic, old or new, large or small. The work is guaranteed for a year. Our area takes in 395 places across Surrey, large and small.
Every address in RH6 is within our area for external mastic. If you need external mastic at a property on Peeks Brook Lane and Donkey Lane or anywhere close by, our applicators can take on the job. We also cover the places around Fernhill: Burstow (1 mile east), Shipley Bridge (1 mile south), Tinsley Green (1 mile south-west), Keeper's Corner (1 mile east) and Copthorne (1 mile south). Within a short drive, we also cover Epsom (14 miles north-west), Redhill (6 miles north), Ewell (15 miles north), Reigate (6 miles north-west), Caterham (9 miles north) and Dorking (10 miles north-west).
Landmarks near Fernhill
In Fernhill, that means homes and buildings near The Shipley Bridge pub. The nearest railway station is Gatwick Airport station, about 1 mile west of the centre. Other landmarks nearby include County Mall (3.6 miles south-west) and Langley Green Hospital (2.9 miles south-west). Green spaces nearby include Hedgecourt Lake.
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Don’t let climbing plants root in the sealant
- Have failed joints looked at early
- Leave the joints unpainted unless we’ve said otherwise
- Wash walls gently around the sealant
Don’t paint over the new sealant unless we have said the product is paintable. Paint can crack on a flexible joint, and paint can crack as the joint moves.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Resealing it early helps prevent that.