Greater London · England
Sand mastic for sash & case windows in Shirley, Greater London
Sand mastic in Shirley from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Mastic worn away on windows facing the weather
- Draughts and rain around sash boxes
- Mastic that needs renewing before redecorating
About our sand mastic in Shirley
Across Shirley, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand for a neat, traditional finish. We’re often asked to deal with old cement repairs round a window that have failed and cracked mastic round a front door frame, on brick reveals, period & listed homes and stone surrounds.
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.
Big or small, you get the same one-year guarantee in Shirley and across Greater London.
- Where
- Shirley (CR0, SE25, CR9)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
An open joint round the frame lets weather in. Left, water can reach the timber and the wall so renewing it early protects the window. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we’ll go through it with you.
Why Shirley clients choose us
- Tidy, careful work
- Approved under the ARBOMaster scheme
- Rated 4.9 stars on Google
- We never seal over old sealant
Read what affects the cost or what customers say.
Shirley: your questions answered
Is Shirley in your area for sand mastic?
Yes, Shirley is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
I let a flat near Elmers End station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
How do I get a quote for sand mastic in Shirley?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before we start.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Can you do several jobs on one visit?
Yes, we can. More than one area can go on one quote.
Can new sealant go over the old?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply call 0345 464 0079 or email us.
What the job involves on each surface
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. The gap round it is pointed with sand mastic.
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. We rake it out and renew it.
Frames and glazing around Shirley
Historic houses like Addington Palace (about 1.7 miles south) are a reminder that the area around Shirley has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking.
Homes close to St George The Martyr Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. As a London address, Shirley can be tricky for parking: let us know about parking bays, permits or a driveway.
Shirley is about 2 miles north-east of Croydon, in Greater London. For sand mastic in and around Shirley, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We’re based in Crawley and cover Greater London. Our area takes in 764 places across Greater London, from the larger towns to small villages. There’s also a page for London, about 8 miles away.
Every address in CR0, SE25 and CR9 is covered for sand mastic. Streets in the area include Poppy Lane, Homer Road and Craven Road, and we cover them all. Being close to the A232, Shirley is simple for us to get to. Other places close to Shirley include Monks Orchard (1 mile north), Shirley Oaks (1 mile west), Addiscombe (1 mile west), Ashburton (1 mile north-west) and Woodside (1 mile north-west). Within a short drive, we also cover London (8 miles north), City of Westminster (10 miles north-west), Marylebone (10 miles north-west), Kensington (10 miles north-west), St Pancras (10 miles north) and Shoreditch (10 miles north).
Around Shirley
Around Shirley, our work takes us to homes and buildings near The Cricketers pub, Ashburton Park and Orchard Way Primary School, among other places. Shirley’s nearest station is Elmers End station, about 1.2 miles north. Well-known places in the area include Crystal Palace Museum (2.8 miles north) and St George's Walk (2 miles west). Green spaces nearby include Duppas Hill and Bramley Bank.
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Towns and villages near Shirley
What else we do in Shirley
How we quote for sand mastic
Your quote is based on your job. We look at:
- The product the joint needs
- Working hours on commercial sites
- The number of rooms or windows
- How much there is to do
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- Access, such as stairs, a lift or height
- Where the job is, and your postcode
- If it’s domestic, commercial or a hotel
- Pictures of the joints, sent by email
If you are in Shirley and need sand mastic, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
When it is not the sealant
A few problems are outside what sealant work can do:
- Sashes that need overhauling
- Damaged stone surrounds
- Whether work needs listed building consent
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think before booking.
Joints and surfaces we work on
- Stone surrounds
- Timber door frames
- Period & listed homes
- Tenement windows
- Brick reveals
- Sash and case windows
How the visit works
When we get to you, we check the joints match what you told us. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a single window, longer for several. For a job in Shirley, parking and access are the things to plan: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Mention any tricky access
- Let us know if you’ve seen damp or leaks
- Tell us about any previous sealing or DIY attempts
How to get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that is easy.
Read more
Common problems we fix in Shirley
Previous repairs in cement or silicone often trap water or crack away. They don’t move with the timber, and they normally need raking out.
Common reasons people contact us are:
- Mastic dropping out of the joint
- Gaps where the frame meets the masonry
- Gaps round a timber door in stone or brick
- Silicone on a period window that looks wrong
If you look after a building such as Oasis Academy Shirley Park, its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- Is VAT in the price?
- What product goes in the joint
- How much experience the applicator has
- How long the guarantee is