Surrey · England
South Park External Mastic
External mastic in South Park from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Hard, crazed mastic that has stopped moving
- Rain getting behind render or cladding at a joint
- Cracked joints where brick meets render or frames
About our external mastic in South Park
A movement joint is only as good as its depth. Closed-cell backing rod sets the depth and stops the sealant sticking to the back, leaving it bonded to two faces so it can move with the wall. Common call-outs are for movement joints with cracked, split or missing sealant and panel joints letting water in, across joints between brick and frames, façade panels and render & cladding joints.
In and around South Park, older properties sit alongside newer ones, each with its own outside joints. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- South Park (RH2)
- Region
- Surrey
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
The process
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. It usually takes a few hours for a handful of joints, longer for a whole elevation. In a smaller place like South Park, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We look at every joint and agree a colour to suit the wall.
- 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.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Let us know about parking restrictions
- Move anything stored near the joints
- Keep pets and children clear of the area while we work
Get a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand, and we will take it from there.
Advice
Common questions in South Park
Will you come out to South Park?
Yes. South Park is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Reigate station?
Yes. We work for landlords and agents as well as homeowners. You can phone 0345 464 0079 or email us with the details for a clear quote.
Will the new joint stand out?
We choose a sealant colour to suit the brick, stone or render. Exterior sealants come in a good range of colours.
Do you remove the old sealant?
Yes, every time. New sealant won’t bond properly to old, so the joint is cleaned back first.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Are you ARBOMaster approved?
Yes. We’re approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
How much does external mastic cost in South Park?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or email us and tell us what needs doing and where.
Is the work guaranteed?
Yes. Each job is guaranteed for twelve months, large or small.
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together, and we’re fully insured.
When it isn’t the sealant
We will not take on work that will not last, so these are the limits:
- Structural movement, which needs a surveyor or engineer
- Cracked brickwork or render that needs a builder or plasterer
- Failed render or damaged cladding panels
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before you book.
Surfaces we seal
- Façade panels
- Concrete & block
- Render & cladding joints
- Brickwork movement joints
- Joints between brick and frames
- Copings & trims
Why it’s worth doing now in South Park
Sealing over the top of old mastic doesn’t hold for long. New sealant doesn’t bond well to old, weathered sealant, so we always take the old sealant out. Around South Park, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why South Park customers choose us
- A 12-month guarantee on all work
- Anti-fungal sanitary silicone in wet areas
- Arbo and Everbuild products
- Tidy, careful work
See what affects the cost or our reviews.
What external mastic looks like in South Park
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Reigate station? Then outside joints that have cracked can let damp into a rental, so check them between lets. For site and facilities teams at buildings such as Sandcross Primary School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Homes close to St Luke's include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
South Park is about 1 mile south of Reigate, in Surrey. South Park gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Surrey coverage runs to 395 places, and South Park is one of them. For nearby work, see our Crawley page.
We work across RH2 for external mastic and the streets around it. You’ll find streets such as Smith Road, North Road and Apley Road. Nearby, we also carry out external mastic in Reigate (1 mile north), Sidlow (1 mile south), Irons Bottom (2 miles south), Leigh (2 miles south-west) and Dawesgreen (2 miles south-west). We also work in nearby towns such as Epsom (8 miles north), Horley (4 miles south-east), Ewell (9 miles north), Walton-on-Thames (14 miles north-west), Caterham (7 miles north-east) and Dorking (5 miles west).
Landmarks near South Park
In South Park, that means homes and buildings near The Bell Public House, Castle Grounds and Reigate Grammar School, among other places. The nearest railway station is Reigate station, roughly 1.1 miles north. Well-known places in the area include East Surrey Hospital (2 miles east) and Reigate Priory Museum (0.7 miles north). For a walk, there’s Colley Hill and Reigate Heath.
How the job changes by surface
Render joints
The face of render can be soft, so a sealant that stretches easily protects the edges. We prime where the product needs it.
Joints between dissimilar materials
Different materials may need different primers. Both surfaces are cleaned and primed as the product requires.
Nearby places to South Park
Other services in South Park
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, 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.
What affects the quote in South Park
Some jobs are bigger than they look, and some smaller. The main factors:
- Which sealant suits the joint
- Working hours on commercial sites
- Whether old sealant or filler has to be cut out
- The size of the job
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
What we need to know
Before you ask for a quote, have a think about:
- How we’d reach the joints
- What’s wrong with the joints now
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
Need a quote? Please ring 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.