Surrey · England
Redhill External Mastic
Professional external mastic in and around Redhill, with every bit of old sealant taken out first and a 12-month guarantee.
- Sealant pulling away from one side of the joint
- Cracked joints where brick meets render or frames
- Weeds or debris growing in open joints
Landlord and commercial work in Redhill
For anyone letting property in or around Redhill, jobs at different addresses can go on one quote. 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. For commercial premises, we can talk through working times when we quote.
About our external mastic in Redhill
Joints between dissimilar materials, like brick against render or concrete against a steel frame, see movement from both sides. A flexible exterior sealant takes up that movement where a rigid filler would soon crack. We work on joints between brick and frames, render & cladding joints and concrete & block, and people most often call us about plants rooting in failed movement joints and joints with sealant missing in places.
Garage door frames, porches and roofline trims are all part of external work in a town like Redhill. Each joint between different materials moves in its own way, so the sealant has to cope with that.
We stand behind the work with a one-year guarantee, so you are not left on your own once the job is done.
- Location
- Redhill (RH1, RH2)
- Wider area
- Surrey
- Cover
- A year, on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Common problems we fix in Redhill
Sunlight, wet weather and frost wear exterior sealant down. In time it goes hard, crazes on the surface and stops stretching, so the joint eventually tears or comes away from one side.
These are the problems we are asked about most:
- Damp patches traced to an open external joint
- Weathered mastic that no longer stretches
- Gaps where render, brick and frames meet
- Joints where the bead has come unstuck
If you let a flat or house near Redhill station, failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Before you book anyone
- When the joint can take water or movement
- Is VAT in the price?
- Who does the work, and how experienced they are
- The length of the guarantee
Different surfaces, different methods
Joints between dissimilar materials
Wherever two materials meet, they move differently. We seal the joint with a flexible exterior sealant.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. The movement joint takes that up, so its sealant has to stay flexible.
The process
Good joint work is mostly preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours to a few days, depending on the length of joint and the access. A visit in Redhill needs access to the work and a place to park close by. For outside work, let us know about side access, gates and any upper-floor joints.
- First, the joints are inspected and the access agreed.
- We cut out the old mastic and rake out anything in the joint.
- 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
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
Get a quote
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Read more
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
Also in Redhill
When something else is needed
New sealant cannot fix everything, and we’d rather say so up front. It won’t solve:
- Render that’s blown, hollow or coming away
- Cracked brickwork or render that needs a builder or plasterer
- Movement that is more than a sealant joint can take
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Copings & trims
- Concrete & block
- Brickwork movement joints
- Render & cladding joints
- Façade panels
- Joints between brick and frames
FAQs for Redhill
Is external mastic in Redhill guaranteed?
All our work, in Redhill and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Do you cover Redhill for external mastic?
Yes. We work across London and the South East, and Redhill is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear quote.
How do I get a quote for external mastic in Redhill?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or email us and let us know what needs doing and where.
What should I tell you?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply phone 0345 464 0079 or drop us an email.
Can landlords and businesses book you?
Yes. As well as homeowners, we work for landlords, agents, businesses and hotels in Redhill.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we are fully insured.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
I rent my home. Can I book you?
Yes, though it’s best to check with your landlord first. Landlords are often happy for the work to be arranged.
Outside joints around Redhill
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.
For site and facilities teams at buildings such as St Joseph's Catholic Primary School, its movement joints, gutters and trims need looking after like any other building’s. In the older streets around Saint Matthew's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Redhill is about 9 miles north of Crawley, in Surrey. Every kind of property in Redhill can book us for external mastic. The work is guaranteed for a year. Redhill is one of 395 towns and villages in Surrey we cover for external mastic. Crawley is on our list too, about 9 miles from Redhill.
Our applicators cover all of RH1 and RH2 for external mastic and the streets around it. If you need external mastic at a property on High Street, Station Road and Church Road or a nearby road, we can help. You will find Redhill on the A23 and A25, which makes it straightforward to reach. Other places close to Redhill include Earlswood (1 mile south), Holmethorpe (1 mile north-east), Meadvale (1 mile south-west), South Earlswood (2 miles south) and South Nutfield (2 miles south-east). We also work in nearby towns such as Epsom (8 miles north-west), Horley (4 miles south), Ewell (9 miles north-west), Walton-on-Thames (14 miles north-west), Caterham (5 miles north-east) and Dorking (7 miles west). Being one of Surrey’s larger places, Redhill has every kind of property, from flats to offices.
Local landmarks in Redhill
Typical jobs here are in homes near The Carrington School, Nutfield Marshes and Dunottar School, among other places. Redhill has its own railway station: Redhill station. Nearby you’ll also find The Belfry (within half a mile north) and Surrey Fire Museum (1.2 miles west). The countryside around Redhill includes Colley Hill and Reigate Heath.
Why it’s worth doing now in Redhill
Mortar or ordinary filler might look like a quick way to close an open joint, but it locks the joint solid. The wall then cracks somewhere else. A flexible sealant over backing rod is what the joint needs. Around Redhill, failed sealant lets water into hidden places, like the floor under a bath, the back of a panel or the inside of a wall. Whatever the joint, failed sealant only gets worse.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why us?
- Trusted Arbo and Everbuild sealants
- Rated 4.9 stars on Google
- You choose the colour before work begins
- Any old sealant cut out fully, not covered over
Take a look at what affects the cost or customer reviews.