Greater London · England
Upper Ruxley Sand Mastic
Window and door surrounds in Upper Ruxley need attention? We remove the old material, prepare the joints and seal them properly.
- Gaps round a timber door in stone or brick
- Mastic that needs renewing before redecorating
- Silicone on a period window that looks wrong
What we do, step by step
Once we are on site, 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. In Upper Ruxley, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Mention if the joints have been sealed before
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved and give you a clear price.
Related advice
About our sand mastic in Upper Ruxley
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. We work on brick reveals, sash and case windows and timber door frames, and the jobs we see most are a silicone bead on a sash window that spoils the look and window mastic to renew ahead of painting.
London has a lot of flats and conversions, where windows are often on upper floors. Who looks after the outside of the frames can depend on the lease, so check that first, and access in Upper Ruxley is something to talk through when you book.
Our work is backed for twelve months.
- Location
- Upper Ruxley (DA14)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Plan mastic work ahead of painting
- Check with your local planning authority if your home is listed
- Have rotten timber repaired before new mastic goes in
- Keep sills and gutters clear so water drains away
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look rather than patching it.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
Should I try it myself first?
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. Everything old must be removed first.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Questions from Upper Ruxley
I let a flat near Swanley station. Can you help?
Yes, we work for landlords and letting agents. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.
Is Upper Ruxley in your area for sand mastic?
Yes, Upper Ruxley is within the area we cover. Our work covers 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.
Should I check with the council before work on a listed or conservation-area home?
Checking first is sensible. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.
What information do you need?
A short description and the location, with pictures by email if possible. If we need more, we’ll ask.
Are you fully insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
What’s sand mastic made of?
Sand plus a binder based on linseed oil. It’s applied by hand and shaped to suit the surround.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
Why deal with it now?
Replacing sash windows is a big decision for a period home and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in Upper Ruxley, the repair is bigger than the sealant job would have been.
What you pay reflects the work, not guesswork. That is why we ask a few questions first and give you a clear price before work begins.
Why book with us
- Any old sealant cut out fully, not covered over
- Domestic, commercial and hotel work
- 4.9 on Google from 180+ five-star reviews
- Over 20 years’ experience
Take a look at what affects the cost and what customers say.
Different surfaces, different methods
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.
When something else is needed
Sealant is not the answer to every problem, and we’ll tell you before we start. It won’t solve:
- Cracked or broken glass
- Damaged stone surrounds
- Timber that has rotted
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think.
Where we work in Upper Ruxley
- Timber door frames
- Brick reveals
- Stone surrounds
- Tenement windows
- Period & listed homes
- Sash and case windows
Places near Upper Ruxley
What else we do in Upper Ruxley
Signs you need sand mastic in Upper Ruxley
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows.
Signs it’s time to call us include:
- Tired mastic found when preparing windows for paint
- Gaps round a timber door in stone or brick
- Open joints round the window box
- Silicone on a period window that looks wrong
In the older streets around St Botolph's Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
What to look for in a quote
- How long to leave it before use
- What preparation is included
- What insurance they hold
- Which sealant they’ll use, and why
Sand mastic in Upper Ruxley: local notes
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking.
If you let a flat or house near Swanley station, older sash windows in a rental need their mastic kept sound to keep the weather out. As a London address, Upper Ruxley can be tricky for parking: let us know about parking bays, permits or a driveway.
Upper Ruxley is about 2 miles south-east of Sidcup, in Greater London. If you need sand mastic in Upper Ruxley, please call 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover Greater London, Upper Ruxley included. 764 places in Greater London are on our list. We also work in London, around 12 miles away.
Work in DA14 is quoted and booked the same way as anywhere else. Whether your property is on Maidstone Road and Old Maidstone Road or a nearby road, our applicators can take on the job. We also cover the places around Upper Ruxley: Ruxley (1 mile north-west), Hockenden (1 mile south-east), Stonehill Green (1 mile east), Foots Cray (1 mile west) and North Cray (1 mile north). Further out, we also cover London (12 miles north-west), City of Westminster (15 miles north-west), Marylebone (14 miles north-west), St Pancras (14 miles north-west), Shoreditch (12 miles north-west) and Walthamstow (14 miles north-west).
Around Upper Ruxley
Around Upper Ruxley, our work takes us to homes and buildings near Kemnal Technology College and Foots Cray Meadows. Upper Ruxley’s nearest station is Swanley station, about 1.7 miles south-east. Well-known places in the area include Queen Mary's Hospital (1.8 miles west) and Eynsford Castle (4.2 miles south-east). Open spaces near Upper Ruxley include The Warren and Summer Hill.