Greater London · England
Sand Mastic in Old Coulsdon
Window and door surrounds in Old Coulsdon need attention? We cut out the old, prepare the joints and apply the right sealant.
- Cement or filler used on old window joints that has cracked
- Wind and rain getting in round a sash window
- Tired mastic found when preparing windows for paint
For landlords and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Sand mastic in Old Coulsdon, done properly
Burnt sand mastic is a traditional material that sits naturally against stone and brick. It suits period and listed homes, where modern sealant can look out of place. Common call-outs are for mastic round period door frames that has failed and cement or filler used on old window joints that has cracked, on brick reveals, timber door frames and period & listed homes.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking, and access in Old Coulsdon is something to talk through when you book.
A 12-month guarantee comes as standard, so you are not left on your own once the job is done.
- Where
- Old Coulsdon (CR5, CR3, CR8)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Surface by surface
Stone surrounds
Old stone surrounds are often uneven, so the joint varies in width. Sand mastic is shaped by hand to suit.
Timber door frames
Round a period front door, sand mastic gives the right look.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Inspect the joints round the windows every year or so
- Keep modern sealant off the mastic
- Keep sills and gutters clear so water drains away
- Take care around the mastic when scraping paint
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look before trying a quick fix.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens.
Old Coulsdon homes and the weather
In a converted house or block, who looks after the windows depends on the lease, so check that before you book. With historic houses such as Addington Palace (about 5 miles north-east) nearby, there’s older building stock in the area around Old Coulsdon as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Old Coulsdon is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book. Homes close to Church of St John the Evangelist include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Letting a property close to Coulsdon South station? Then any sash windows need sound mastic to keep draughts and rain out.
Old Coulsdon is about 1 mile south-east of Coulsdon, in Greater London. Old Coulsdon gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Old Coulsdon is one of 764 places in Greater London where we work for sand mastic. For nearby work, see our London page.
Our applicators cover all of CR5, CR3 and CR8 for sand mastic. That includes homes and businesses on Ellis Road, Tollers Lane and Court Avenue. If you are just outside Old Coulsdon, we cover Coulsdon (1 mile north-west), Chipstead (2 miles west), Purley (2 miles north), Woodcote (2 miles north-west) and Woodmansterne (3 miles west). We also work in nearby towns such as London (14 miles north), City of Westminster (15 miles north), Marylebone (15 miles north), Kensington (14 miles north), Whitechapel (15 miles north) and Brompton (14 miles north).
Around Old Coulsdon
Around Old Coulsdon, our work takes us to homes and buildings near Sunnydown School, Dollypers Hill and The Tudor Rose pub. The nearest railway station is Coulsdon South station, about 1.4 miles north-west. A little further out are East Surrey Museum (2 miles south-east) and St Lawrence's Hospital (1.3 miles south-east). Open spaces near Old Coulsdon include Nore Hill and Mercers Lake.
What we do, step by step
Once we are on site, we check the joints match what you told us. If anything is different, we explain it before carrying on. After that, the work takes a few hours for a single window, longer for several. For a job in Old Coulsdon, parking and access are the things to plan: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We start by checking each surround and agreeing the joints to renew.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Mention any sign-in or site rules at work premises
- Where the joints are inside, avoid wetting them before we arrive
Get a quote
We do not publish a price list. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or send us an email.
Read more
Can I do it myself?
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Towns and villages near Old Coulsdon
More services for Old Coulsdon
What we cannot put right
We’d rather tell you now than do work that won’t last, so these are the limits:
- Planning or listed building consent (your local planning authority decides)
- Crumbling stone or brickwork round the window
- Decayed frames that need repair
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before booking.
What we seal
- Period & listed homes
- Stone surrounds
- Brick reveals
- Timber door frames
- Tenement windows
- Sash and case windows
Old Coulsdon questions
Can parking be tricky for a visit in Old Coulsdon?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
Do you cover Old Coulsdon for sand mastic?
Yes. We work across London and the South East, and Old Coulsdon is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we’ll give you a clear quote.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint.
Do you have insurance?
Yes. We’re fully insured for every job we do.
Is there any odour?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
How do I get a quote for sand mastic in Old Coulsdon?
It depends on the job, so we quote each one individually. For a quick quote, phone 0345 464 0079 or send us an email and tell us what needs doing and where.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we will talk you through it.
How we quote for sand mastic
Call for a quick quote. The main things that affect it are:
- Which sealant suits the joint
- When we can work, for business premises
- Access and height
- Whether there’s mould to deal with
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, phone 0345 464 0079 or email us for an honest opinion and a quote.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- Roughly how big the job is
- Photos by email, if that is easy
- The problem you’ve noticed
- Whether it’s a home or a business
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.