Surrey · England
Sand mastic for sash & case windows in South Park, Surrey
Problem with your window and door surrounds in South Park? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Gaps round a timber door in stone or brick
- Cement or filler used on old window joints that has cracked
- Mastic dropping out of the joint
About our sand mastic in South Park
On many period windows, sand mastic looks right and suits the building. Newer frames normally get a flexible sealant instead, and we’ll talk through which suits your home. If you are dealing with draughty sash windows at the surround and open joints round the window box, we can help.
In a smaller place like South Park, some walls face open ground and catch the full force of the weather. The mastic around frames on those walls tends to age faster.
Big or small, it’s backed by our 12-month guarantee in South Park and across Surrey.
- Where
- South Park (RH2)
- Wider area
- Surrey
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
South Park questions
Is South Park in your area for sand mastic?
Yes. We work across London and the South East, and South Park is part of that. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear price.
Will you come out to South Park?
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.
I rent my home. Can I book you?
Yes, though it’s best to check with your landlord first. Many landlords are glad to have it sorted.
Is it possible to take out silicone and use sand mastic instead?
Yes. The silicone is cut out and the joint cleaned before the sand mastic goes in.
Can new sealant go over the old?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
What does sand mastic cost?
It depends on the job, so we quote each one individually. To get one, call 0345 464 0079 or email us and let us know what needs doing and where.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. Then phone 0345 464 0079 or send us an email.
Where are you based?
Mr Mastic is based in Crawley. We cover South Park and the rest of Surrey, along with the rest of our area.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
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.
Places near South Park
More services for South Park
What affects the quote in South Park
There’s no set price list, because no two jobs are the same. What we look at:
- Whether the work is at height
- Whether there’s mould to deal with
- Whether old sealant or filler has to be cut out
- Any working-time requirements on site
The cost depends on the size of the job, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- Whether it’s a home or a business
- If someone has resealed it before
- A few pictures by email, if you can
- Roughly how big the job is
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you’re ready, phone 0345 464 0079 or send us an email.
How it works
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the job takes a few hours for a single window, longer for several in most cases. Parking around South Park is normally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Before we arrive
- Clear the area around the work
- Mention any tricky access
- Let us know about earlier repairs to the joints
Ask for a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Read more
Honest limits
In fairness, there are a few things sealant won’t fix:
- Sashes that need overhauling
- Damaged stone surrounds
- Cracked or broken glass
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before you book.
What we seal
- Tenement windows
- Brick reveals
- Stone surrounds
- Sash and case windows
- Period & listed homes
- Timber door frames
Common problems we fix in South Park
Over the years, sand mastic weathers. It hardens, cracks and starts to come away from the frame or the masonry.
If you can see any of these, it’s time to have the joints looked at:
- A silicone bead on a sash window that spoils the look
- Gaps where the frame meets the masonry
- Cracked mastic round a front door frame
- Mastic that needs renewing before redecorating
For site and facilities teams at buildings such as Sandcross Primary School, its window and door frames need their mastic kept sound, just like a home’s.
What your quote should include
- What preparation is included
- How hidden problems are handled
- Whether you can choose the colour
- What the cure time is
How the job changes by surface
Stone surrounds
Old stone surrounds are often uneven, so the gap isn’t the same all the way round. Sand mastic is shaped by hand to suit.
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. Sand mastic seals the joint round it.
For landlords and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured for the work.
Sand mastic in South Park: local notes
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.
If you let a flat or house near Reigate station, older sash windows in a rental need their mastic kept sound to keep the weather out. In the older streets around St Luke's, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
South Park is about 1 mile south of Reigate, in Surrey. Anywhere in RH2, our applicators can take on sand mastic. Our Surrey coverage runs to 395 places, South Park among them. For nearby work, see our Crawley page (8 miles or so).
Jobs for sand mastic in RH2 works the same way as everywhere else we cover. You’ll find streets such as Smith Road, North Road and Apley Road, all of which we cover. Nearby, we also carry out sand 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). Further out, we also cover 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).
Around South Park
Locally, jobs take us to homes and businesses close to The Bell Public House, Castle Grounds and Reigate Grammar School. South Park’s nearest station is Reigate station, roughly 1.1 miles north of the centre. Nearby you’ll also find East Surrey Hospital (2 miles east) and Reigate Priory Museum (0.7 miles north). Green spaces nearby include Colley Hill and Reigate Heath.