Surrey · England
Sand Mastic in Caterham
Sand mastic across Caterham and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Window mastic to renew ahead of painting
- Draughts and rain around sash boxes
- Gaps between timber frames and stone or brick
What we do, step by step
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes anything from a few hours to a full day, depending on how many windows, and the area is left clean. Parking in a town like Caterham is usually straightforward, but tell us if there’s a driveway or any restrictions, and mention if the work is upstairs, in a flat or high on the outside.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- On commercial sites, let us know about site rules
- Mention if the joints have been sealed before
Get a quote
Need a quote? Please ring 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
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How we handle sand mastic in Caterham
Sand mastic doesn’t last for ever, leaving gaps round the window. Renewing it closes the gap and tidies the surround. We work on timber door frames, period & listed homes and stone surrounds, and the jobs we see most are silicone on a period window that looks wrong and weathered mastic on the most exposed windows.
Around Caterham, many houses have gained conservatories, French doors or replacement windows over time. Every addition brings more joints, each wearing at its own pace. Sills, frame heads and glazing joints are where leaks generally start.
Each job carries a 12-month guarantee, large or small.
- Location
- Caterham (CR3)
- Wider area
- Surrey
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How to look after the new joints
Simple care keeps the joints in good condition. Our advice:
- Inspect the joints round the windows every year or so
- Leave the new mastic unpainted
- Ask a joiner to look at soft timber first
- Check with your local planning authority if your home is listed
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
Different surfaces, different methods
Period and listed homes
Many older homes were built with sand mastic round the windows. If your home is listed, ask your local planning authority about consent.
Timber door frames
Doors face weather and wear and the mastic can crack early. It’s renewed by hand.
Also near Caterham
More services for Caterham
Honest limits
In fairness, some problems need a different trade:
- Sashes that need overhauling
- Broken panes
- Masonry that needs repairing
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before you book.
Surfaces we seal
- Sash and case windows
- Brick reveals
- Tenement windows
- Period & listed homes
- Timber door frames
- Stone surrounds
Why deal with it now?
Filling over old, loose mastic does not last. We remove the loose material first so the new mastic stays put. Gaps in sealant and mould in the bead never get better on their own, and in a busy household in Caterham they spread with every shower and every downpour. Replacing the sealant now is the simplest fix.
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or email us and we’ll talk you through it.
Why us?
- Sanitary silicone with an anti-fungal additive in wet areas
- An ARBOMaster approved applicator
- Arbo and Everbuild products
- Any old sealant cut out fully, not covered over
See our cost guide or what customers say.
Signs you need sand mastic in Caterham
Sand mastic slowly weathers. It hardens, cracks and starts to come away on the stone or timber.
It’s worth asking for a quote if you see:
- Gaps round a timber door in stone or brick
- Gaps where the frame meets the masonry
- Draughty sash windows at the surround
- Tired mastic found when preparing windows for paint
For landlords with property near Caterham station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Comparing quotes
- How the joint is cleaned and prepared
- When the joint can take water or movement
- Who turns up on the day
- Which colour the sealant will be
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.
If you manage several properties in or around Caterham, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
Frames and glazing around Caterham
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Titsey Place (about 4.7 miles east) are a reminder that the area around Caterham has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Schools such as Hillcroft Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. For an older house near a landmark such as Sacred Heart Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Caterham is about 11 miles south-west of Orpington, in Surrey. Every kind of property in Caterham can book us for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Caterham is one of 395 towns and villages in Surrey where we work for sand mastic. For nearby work, see our Crawley page, about 13 miles away.
Every address in CR3 is covered for sand mastic. Local streets include High Street, London Road and Park Road, and we cover them all. Caterham is on the B2030 and B2031, so it’s easy for us to get to. If you’re just outside Caterham, we cover Woldingham Garden Village (2 miles east), Tyler's Green (2 miles south-east), Woldingham (3 miles east), Godstone (3 miles south) and Church Town (3 miles south-east). Larger places within reach include Epsom (8 miles north-west), Horley (8 miles south-west), Redhill (5 miles south-west), Ewell (8 miles north-west), Reigate (6 miles south-west) and Walton-on-Thames (15 miles north-west).
Near you in Caterham
We work in homes and buildings around Sunnydown School, The King And Queen Public House and de Stafford School. The closest station to Caterham is Caterham station, roughly 0.7 miles south-east. Other landmarks nearby include Bletchingley Castle (3.4 miles south) and East Surrey Museum (0.6 miles south-east). For a walk, there’s South London Downs National Nature Reserve and Mercers Lake.
FAQs for Caterham
Can you do sand mastic in Caterham?
Yes, Caterham is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
I let a flat near Caterham station. Can you help?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before any work starts.
Are you fully insured?
Yes. We are fully insured, and we can confirm the details when we quote.
Should I check with the council before work on a listed or conservation-area home?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for listed or conservation-area properties.
What sealant do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We will tell you what we are using and why.
When will the new mastic be hard?
It skins over fairly quickly but takes longer to harden fully. We’ll tell you what to expect for your job.
Can new sealant go over the old?
No, it won’t last. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What information do you need?
Let us know what needs doing and where. If we need more, we’ll ask.