Greater London · England
Sand Mastic in Moorhouse Bank
Sand mastic in Moorhouse Bank from a team with over 20 years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Tired mastic found when preparing windows for paint
- Draughts and rain around sash boxes
- Modern sealant on a period surround
Sand mastic in Moorhouse Bank, done properly
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditionally, sand mastic is left unpainted, so ask us before you decorate. If you have old sand mastic that has cracked, crumbled or fallen out and mastic worn away on windows facing the weather, we can help, on tenement windows, stone surrounds and sash and case windows alike.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. The mastic around them dries out and cracks with age, which is when draughts and damp patches appear in homes in Moorhouse Bank.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Moorhouse Bank (TN16)
- Region
- Greater London
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Leave it or put it right?
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic suits the building and finishes neatly against the masonry. 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 Moorhouse Bank, the repair is bigger than the sealant job would have been.
Doing several joints on one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
What you get with us
- Quality sealants from Arbo and Everbuild
- Full insurance on every job
- Approved under the ARBOMaster scheme
- Neat joints and a tidy finish
Take a look at our cost guide or our reviews.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Avoid patching sand mastic with silicone
- Get any rot dealt with first
- Make sure water runs off the sill
- Ask the planning authority about consent for listed or conservation-area homes
Leave the new mastic alone while it firms up. It skins over quickly but needs longer to fully harden.
Sound mastic protects the frame. Once it fails, water can sit against the timber, which can lead to rot.
Common questions in Moorhouse Bank
Is parking a problem for a job in Moorhouse Bank?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
I let a flat near Hurst Green station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Do you cover Moorhouse Bank?
Yes. We work in Moorhouse Bank and the rest of Greater London, as part of our work across South East England, London and Scotland. For a quote, phone 0345 464 0079 or drop us an email.
What does sand mastic cost?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or send us an email with a short description of the job.
Are you insured?
Yes. Mr Mastic is fully insured, and we’ve been doing sealant work for more than 20 years.
Can you match the sealant colour?
We help you choose a colour that suits. The choice depends on the product the joint needs.
Is it worth trying 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.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
Work for landlords, hotels and businesses
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Sand mastic in Moorhouse Bank: local notes
Historic houses like Quebec House (about 1.3 miles east) are a reminder that the area around Moorhouse Bank 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. 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 Hurst Green station, any sash windows need sound mastic to keep draughts and rain out. In the older streets around St Andrew's, the joint between an old wall and a newer frame is usually the first place rain gets in. As a London address, Moorhouse Bank can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Moorhouse Bank is about 6 miles west of Sevenoaks, in Greater London. Moorhouse Bank gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Greater London coverage runs to 764 places, and Moorhouse Bank is one of them. We also work in Crawley, around 15 miles away.
Jobs for sand mastic in TN16 is quoted and booked the same way as anywhere else. Close by, we work in The Chart (1 mile south-west), Goodley Stock (1 mile south-east), Westerham (1 mile north-east), Pains-Hill (1 mile south-west) and Titsey (2 miles north-west). Further out, we also cover Orpington (9 miles north), New Cross (15 miles north), Thornton Heath (12 miles north-west), Croydon (10 miles north-west), East Dulwich (15 miles north) and Streatham (14 miles north-west).
Local landmarks in Moorhouse Bank
Locally, jobs take us to homes and businesses close to The Wolfe Public House. The nearest railway station is Hurst Green station, roughly 2.2 miles south-west of the centre. Nearby you will also find Tandridge Priory (1 mile south-west). Green spaces nearby include Betsom's Hill and Dryhill Nature Reserve.
When something else is needed
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Damaged stone surrounds
- Broken panes
- Rotten sashes, sills or window boxes (a joiner’s job)
If in doubt, call 0345 464 0079 or email us and we will say what we think.
Surfaces we seal
- Period & listed homes
- Sash and case windows
- Timber door frames
- Tenement windows
- Brick reveals
- Stone surrounds
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
How the visit works
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 per window, depending on the condition of the joints. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Moorhouse Bank. A visitor permit or a nearby bay makes the visit run more smoothly.
- 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.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Mention if the joints have been sealed before
- Clear the area around the work
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To arrange one, call 0345 464 0079 or drop us an email.
Advice
Different surfaces, different methods
Sash and case windows
A sash window’s box frame sits in the masonry opening. The gap round it is pointed with sand mastic.
Stone surrounds
We take care not to mark the stone when the old mastic comes out.