Surrey · England
Hamsey Green External Mastic
Sealing brickwork movement joints, render, cladding and façade joints for Hamsey Green, backed by a 12-month guarantee. Call for a quick quote.
- Hard, crazed mastic that has stopped moving
- Cracked joints where brick meets render or frames
- Sealant pulling away from one side of the joint
How to look after the new joints
Looking after new joints is easy:
- Keep high-pressure jets off the joints
- Clear growth from the base of walls and joints
- Tell anyone working on the walls about the movement joints
- Make sure movement joints aren’t pointed over
Give the sealant the cure time we tell you before anything rubs against it. Most exterior sealants skin fast but take longer to cure right through.
Leaks behind façade panels and render often go unseen. By the time there’s a damp patch, the damage can be well established, so it’s worth resealing at the first signs.
How we handle external mastic in Hamsey Green
Movement joints let brickwork, render and cladding expand and shrink without cracking. The sealant in it has to stretch and squeeze for years, and when it fails, the wall takes the strain and water finds a way in. Typical jobs include joints pointed up with cement by mistake and hard, crazed mastic that has stopped moving, across concrete & block, render & cladding joints and brickwork movement joints.
Older homes in small places like Hamsey Green may be stone, brick or timber-framed, often with later extensions. Where one material meets another is where water normally gets in.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- Hamsey Green (CR6, CR2)
- Wider area
- Surrey
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Movement that is more than a sealant joint can take
- Adding movement joints to masonry that has none
- Cracks in the bricks or render themselves, away from the joints
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
Surfaces we seal
- Brickwork movement joints
- Concrete & block
- Copings & trims
- Render & cladding joints
- Façade panels
- Joints between brick and frames
Walls and rooflines in Hamsey Green
Historic houses like Addington Palace (about 2.8 miles north) are a reminder that the area around Hamsey Green has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as Hamsey Green Primary, larger buildings have long runs of movement joint that eventually need resealing. If you live in an older home near St Antony, older walls, gutters and the joints where extensions meet them need a flexible sealant. Rented homes near Upper Warlingham station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Hamsey Green is about 1 mile north of Warlingham, in Surrey. Homes, rented property, offices and hotels in Hamsey Green can book us for external mastic. The work is guaranteed for a year. 395 places in Surrey are on our list, from the larger towns to small villages. For nearby work, see our London page (13 miles or so).
Here we cover the CR6 and CR2 postcode area for external mastic. Whether your property is on Clyde Avenue, Crewe's Lane and Princes Avenue or anywhere close by, our applicators can take on the job. We also cover the places around Hamsey Green: Warlingham (1 mile south), Whyteleafe (1 mile south-west), Chelsham (1 mile east), Sanderstead (1 mile north-west) and Farleigh (1 mile east). Within a short drive, we also cover Epsom (9 miles west), Horley (11 miles south-west), Redhill (7 miles south-west), Ewell (9 miles west), Reigate (8 miles south-west) and Caterham (3 miles south-west).
Landmarks near Hamsey Green
Locally, jobs take us to homes and businesses close to Blanchman's Farm, The White Lion Public House and Warlingham School and the streets around them. For rail, the closest station is Upper Warlingham station, about 1 mile south-west. A little further out are Warlingham Park Hospital (1.4 miles east) and East Surrey Museum (2.6 miles south). For a walk, there’s South London Downs National Nature Reserve and Nore Hill.
Quotes for external mastic in Hamsey Green
The quote reflects the job in front of us. We look at:
- The product the joint needs
- How much there is to do
- The old material and how stubborn it is
- Any working-time requirements on site
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, phone 0345 464 0079 or send us an email for an honest opinion and a quote.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- What’s wrong with the joints now
- A few pictures by email, if you can
- If someone has resealed it before
- If it’s domestic, commercial or a hotel
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Landlords, agents and businesses in Hamsey Green
We work for landlords and agents as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.
How the visit works
Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a handful of joints, longer for a whole elevation. In a small place like Hamsey Green, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we look over the joints with you, agree which to renew and talk through access.
- The old mastic and anything lodged in the joint is removed.
- Both sides are cleaned back to sound material and primed if needed.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- We gun in a flexible exterior sealant in a colour that suits the wall and tool it neatly.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Mention any tricky access
- Clear the area around the work
How to 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.
Related advice
Hamsey Green questions
Do you work for landlords with property near Upper Warlingham station?
Yes. We work for landlords and letting agents as well as householders. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
Will you come out to Hamsey Green?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you remove the old sealant?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Where are you based?
Mr Mastic is based in Crawley. We cover Hamsey Green and the rest of Surrey.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll explain our choice.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
How much does external mastic cost in Hamsey Green?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before work begins.
Why it’s worth doing now in Hamsey Green
A failed movement joint lets water into the wall, behind render and cladding. Dealing with it early keeps the repair to the joint, rather than the wall around it. In a small place like Hamsey Green, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Why Hamsey Green clients choose us
- Old sealant always removed completely
- Every job guaranteed for a year
- Rated 4.9 stars on Google
- Experience in homes, commercial sites and hotels
See our cost guide and what customers say.
Places near Hamsey Green
Other services in Hamsey Green
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.