Surrey · England
Sand mastic for sash & case windows in Leigh, Surrey
Professional sand mastic in and around Leigh, with old sealant always removed completely and a 12-month guarantee.
- Old cement repairs round a window that have failed
- Draughty sash windows at the surround
- Weathered mastic on the most exposed windows
About our sand mastic in Leigh
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. We work on brick reveals, stone surrounds and timber door frames, and common reasons people get in touch are draughty sash windows at the surround and gaps round a timber door in stone or brick.
Somewhere as small as Leigh, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
The work is covered for a year after we finish. If anything isn’t right with it, phone 0345 464 0079 or drop us an email.
- Location
- Leigh (RH2)
- Region
- Surrey
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
What the job involves on each surface
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
Common questions in Leigh
Is Leigh within the area you cover?
Yes, Leigh is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you cover Leigh for sand mastic?
Yes, Leigh is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Where is Mr Mastic based?
Mr Mastic is based in Crawley. Our applicators cover Leigh, along with the rest of our area.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Is it worth trying it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
I’m a tenant. Can you help?
Yes, but check with your landlord or agent first. Landlords are often happy for the work to be arranged.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we’ll talk you through it.
Do I need permission for sand mastic on a listed building?
Check with your local planning authority. They decide whether consent is needed.
Windows and doors in Leigh
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Schools such as Burys Court School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Betchworth station, older sash windows in a rental need their mastic kept sound to keep the weather out. If you live in an older home near Church of St Bartholomew, the joint between an old wall and a newer frame is usually the first place rain gets in.
Leigh is about 3 miles south-west of Reigate, in Surrey. If you need sand mastic in Leigh, please phone 0345 464 0079 or send us an email for a quick quote. We cover Surrey from our Crawley base. We cover 395 towns and villages across Surrey, large and small. For nearby work, see our Crawley page (7 miles or so).
Work in RH2 works the same way as everywhere else we cover. We cover properties on Church Road, Smalls Hill Road and The Glebe and the roads around them. We also cover Dawesgreen (1 mile north-west), Bunce Common (1 mile west), Irons Bottom (2 miles east), Strood Green (2 miles north-west) and Sidlow (2 miles east). Further out, we also cover Guildford (14 miles west), Epsom (9 miles north), Horley (4 miles south-east), Redhill (4 miles north-east), Ewell (10 miles north) and Reigate (3 miles north-east).
Local landmarks in Leigh
We work in homes and buildings around The Seven Stars Public House, among other places. For rail, the closest station is Betchworth station, about 2.9 miles north. A little further out are Reigate Priory Museum (2.7 miles north-east) and East Surrey Hospital (3.7 miles east). For a walk, there’s Reigate Heath and Colley Hill.
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Ask the planning authority about consent for listed or conservation-area homes
- Have rotten timber repaired before new mastic goes in
- Don’t run silicone over sand mastic
- Make sure water runs off the sill
Leave the new mastic unpainted, as traditional guidance advises. Ask us before any decorating around it.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
Why deal with it now?
Before painting the windows, it pays to renew the mastic. Painting over failed mastic doesn’t seal it, and the new mastic is traditionally left unpainted. Around Leigh, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
The cost depends on the amount of work, how much old material has to come out and access to the work. You will have a clear quote before any work starts, so you know where you stand.
Why book with us
- Anti-fungal silicone where joints get wet
- Quality sealants from Arbo and Everbuild
- Fully insured
- Old sealant always removed completely
Read our cost guide and our reviews.
What we do, step by step
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a single window, longer for several. Somewhere like Leigh needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- Let us know about stairs, lifts or work at height
- Move anything stored near the joints
- For indoor joints, keep the area dry beforehand if you can
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that’s easy.
Advice
Other services in Leigh
Landlords, agents and businesses in Leigh
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
We also work for property managers and facilities teams. We can quote a run of properties together.
How we quote for sand mastic
Jobs vary more than people expect. The main factors:
- Which sealant suits the joint
- Access and height
- The size of the job
- Working hours on commercial sites
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we will explain what it covers.
What we need to know
What to tell us when you ask for a quote:
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
- The address or postcode of the job
To get a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.