Greater London · England
Sand Mastic in Anerley
Sand mastic for Anerley and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Modern sealant on a period surround
- Cement or filler used on old window joints that has cracked
- Mastic worn away on windows facing the weather
What affects the cost of sand mastic
We quote each job individually. This is what makes a difference:
- Which sealant suits the joint
- The amount of work
- Whether the work is at height
- The number of rooms or windows
No two jobs are quite the same, so we quote each one individually. Size, access and the product the joint needs all make a difference.
What to tell us for a quote
What to tell us when you ask for a quote:
- Whether it’s a home or a business
- How we’d reach the joints
- Roughly how big the job is
- Where the job is, and your postcode
Every job is quoted individually, so start by telling us what you need. Just phone 0345 464 0079 or send us an email with the details and send pictures if you have them.
How we handle sand mastic in Anerley
Silicone on a period window often looks wrong and is not always the right material. Sand mastic is the traditional choice and we can swap the silicone for it. We’re often asked to deal with weathered mastic on the most exposed windows and crumbling sand mastic round a window, on brick reveals, timber door frames and stone surrounds.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. Over the years, the sealant around them shrinks, cracks and pulls away, which is when draughts and damp patches appear in homes in Anerley.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Location
- Anerley (SE20, SE19, SE26)
- Region
- Greater London
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Why act early in Anerley
Draughts round a sash window are not always the sashes. Open mastic joints round the box can let air in and new mastic seals them. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Dealing with it early is far simpler.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why book with us
- Fully insured
- Rated 4.9 stars on Google
- An ARBOMaster approved applicator
- Experience in homes, commercial sites and hotels
Read our cost guide and our reviews.
Anerley: your questions answered
Do you work for landlords with property near Anerley station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Is Anerley in your area for sand mastic?
Yes. We work across London and the South East, and Anerley is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing, and we will send you a clear quote.
Where do you work from?
Our base is in Crawley, and we work across South East England, London and Scotland.
What’s sand mastic made of?
It’s the traditional filler for the joint round timber windows and doors. It combines sand with a linseed-oil-based binder.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme.
Is it OK to seal over old sealant?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. Working times can be discussed when we quote.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we will advise.
When it is not the sealant
We will always be straight with you, so here’s what sealant cannot fix:
- Damaged stone surrounds
- Planning or listed building consent (your local planning authority decides)
- Sash cords, weights and draught-proofing of the sashes
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Where we work in Anerley
- Tenement windows
- Stone surrounds
- Sash and case windows
- Timber door frames
- Brick reveals
- Period & listed homes
DIY sealant or a professional job?
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.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so just mention it when you contact us.
Work for landlords, hotels and businesses
Landlords and letting agents in Anerley can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
In hotels, rooms out of use cost money, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Nearby places to Anerley
Other services in Anerley
The process
The work is kept neat and contained to the joints we’re treating, so you can carry on as normal. The job generally takes a few hours for a single window, longer for several. In a London area like Anerley, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
How to prepare
- Mention any sign-in or site rules at work premises
- Tell us about access, such as stairs, a lift or high-level joints
- Clear the area around the work
Getting a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, call 0345 464 0079 or drop us an email.
Advice
How the job changes by surface
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. We renew it the same way as on windows.
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Sand mastic in Anerley: local notes
Historic houses like Kingswood House (about 1.3 miles north-west) are a reminder that the area around Anerley has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Anerley is in London, so parking needs planning: let us know about parking bays, permits or a driveway. Rented homes near Anerley station change hands often, and any sash windows need sound mastic to keep draughts and rain out. For site and facilities teams at buildings such as James Dixon Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Anerley is about 2 miles north-east of Thornton Heath, in Greater London. Jobs in Anerley get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Our area takes in 764 places across Greater London. You can also see our page for London, about 6 miles away.
We cover every part of SE20, SE19 and SE26 for sand mastic and the streets around it. Whether your property is on Maple Road, Padua Road and Genoa Road or a nearby road, our applicators can take on the job. If you are just outside Anerley, we cover Penge (1 mile east), Crystal Palace (1 mile north), Sydenham (1 mile north-east), Gipsy Hill (1 mile north-west) and Upper Norwood (1 mile west). Larger places within reach include London (6 miles north), City of Westminster (8 miles north-west), Marylebone (8 miles north-west), Kensington (8 miles north-west), St Pancras (8 miles north) and Shoreditch (8 miles north).
What’s near Anerley
Locally, jobs take us to homes and businesses close to Crystal Palace School, Crystal Palace Dinosaurs and Harris City Academy Crystal Palace and the streets around them. There’s a railway station in Anerley itself: Anerley station. Well-known places in the area include Crystal Palace Museum (0.5 miles north-west) and Whitgift Centre (3.1 miles south-west). Not far away are Dulwich Upper Wood and Knight's Hill.