Surrey · England
St George's Hill External Mastic
We cover St George's Hill for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Rigid filler in a joint that should flex
- Movement joints with cracked, split or missing sealant
- Failed seals between different materials
Honest limits
Sealant is not the answer to every problem, and we will tell you before we start. It will not solve:
- Subsidence or other structural problems
- Cracks in the bricks or render themselves, away from the joints
- Failed render or damaged cladding panels
If in doubt, ring 0345 464 0079 or email us and we will say what we think.
What we seal
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
- Façade panels
- Brickwork movement joints
- Copings & trims
External mastic in St George's Hill, done properly
We’re ARBOMaster approved applicators, and each external joint gets a sealant suited to it. Porous or awkward surfaces are primed where the sealant needs it and we use one wherever it does. Common call-outs are for plants rooting in failed movement joints and old sealant gone brittle and cracked, across joints between brick and frames, façade panels and brickwork movement joints.
In a smaller place like St George's Hill, some homes face open ground, and walls and rooflines facing the weather take the worst of it. That’s where gutter joints and wall joints tend to fail first.
Big or small, it’s backed by our one-year guarantee in St George's Hill and across Surrey.
- Location
- St George's Hill (KT13, KT11, KT12)
- Region
- Surrey
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
Joints between dissimilar materials
Different materials may need different primers. We prepare both faces so the sealant bonds properly.
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
How the visit works
We keep the work tidy and contained to the joints we’re treating. Expect the work to take a few hours to a few days, depending on the length of joint and the access, and we explain the cure time before we leave. For a job in St George's Hill, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- Each joint is checked and the colour of the new sealant agreed.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Let us know if you’ve seen damp or leaks
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
Related advice
Aftercare tips
So the new joints stay in good condition:
- Act on the first splits you see
- Point out the joints to other trades
- Check external joints each spring
- Ask before painting over external sealant
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.
Act while the splits are small. Then it’s a straightforward cut-out and reseal before water has had years to get in.
Towns and villages near St George's Hill
Other services in St George's Hill
Landlords, agents and businesses in St George's Hill
We also work for property managers and facilities teams in St George's Hill and across Surrey. We can quote a run of properties together.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
Outside joints around St George's Hill
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. Historic houses like Byfleet Manor (about 2.2 miles south) are a reminder that the area around St George's Hill has older buildings as well as new. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
Rented homes near Weybridge station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies. Homes close to United Reform Church include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move. For site and facilities teams at buildings such as Manby Lodge Infant School, its movement joints, gutters and trims need looking after like any other building’s.
St George's Hill is about 1 mile south of Weybridge, in Surrey. Across the KT13 area, we cover external mastic for homes and businesses. St George's Hill is one of 395 places in Surrey we cover. There’s also a page for London, about 18 miles away.
We work across the KT13, KT11 and KT12 postcode area for external mastic. Streets in the area include Cavendish Road, Holme Chase and Winterbourne Grove, all of which we cover. Being close to the B372, St George's Hill is simple for us to get to for external mastic. Other places close to St George's Hill include Weybridge (1 mile north), Brooklands (1 mile south-west), Whiteley Village (1 mile south-east), Burwood Park (1 mile east) and Byfleet (2 miles south-west). We also work in nearby towns such as Guildford (10 miles south-west), Woking (6 miles south-west), Camberley (12 miles west), Epsom (8 miles east), Redhill (15 miles south-east) and Ewell (8 miles east).
Local landmarks in St George's Hill
Locally, jobs take us to homes and businesses close to St George's College Weybridge, The Grotto pub and Heathside School and the streets around them. The closest station to St George's Hill is Weybridge station, roughly 0.5 miles west of the centre. Other landmarks nearby include Elmbridge Museum (3.7 miles east) and No. 2 New Zealand General Hospital (2 miles north-east). The countryside around St George's Hill includes St Ann's Hill and Ferris Meadow Lake.
Your questions about external mastic in St George's Hill
Is St George's Hill in your area for external mastic?
Yes, St George's Hill is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
Is St George's Hill within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Will it make a mess?
Tidy work is part of the job. We protect what’s around the joints, and we clear up when we are done.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover St George's Hill, along with the rest of our area.
How long will you be here?
Most jobs take anything from a few hours to several days, depending on the building, including preparation and clearing up. We will confirm how long when we quote.
Is it OK to fill a movement joint with cement?
No, not if it’s a movement joint. Filling it with mortar defeats its purpose. A flexible sealant is the right fill.
How do you reach high-level joints?
It depends on the building. Tell us the height, the number of joints and what’s below them.
Is it OK to seal over old sealant?
No. The old sealant always comes out first.
Quotes for external mastic in St George's Hill
The quote reflects the job in front of us. We look at:
- Working hours on commercial sites
- The old material and how stubborn it is
- Mould in or behind the old joints
- How many areas need sealing
What you pay reflects the work, not a rough estimate. That is why we ask about the job first and agree the price before starting.
Asking for a quote
To make quoting easier, please include:
- Photos by email, if that is easy
- The type of property
- How we’d reach the joints
- Roughly how big the job is
Getting a quote is simple: let us know the job and the location. A few pictures by email make the job easier to understand, and we will come back to you with a quote.