Greater London · England
Sand mastic for sash & case windows in Hampton Wick, Greater London
Sand mastic for Hampton Wick, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Silicone on a period window that looks wrong
- Crumbling sand mastic round a window
- Wind and rain getting in round a sash window
How we handle sand mastic in Hampton Wick
If your home is listed or in a conservation area, check with your local planning authority whether consent is needed for work to windows. Sand mastic is often favoured as a like-for-like material. If you have window mastic to renew ahead of painting and wind and rain getting in round a sash window, we can help.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Hampton Wick as anywhere.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Hampton Wick (KT1, KT2, TW11)
- Region
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. Our tips:
- Do not paint over the new mastic
- Renew mastic before redecorating the windows
- Look over the window mastic once a year
- Make sure water runs off the sill
Leave the new mastic unpainted, which is the traditional advice. If you’re redecorating, ask us first.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
Honest limits
We’d rather tell you now than do work that will not last, so these are the limits:
- Whether work needs listed building consent
- Sash cords, weights and draught-proofing of the sashes
- Broken panes
If you’re not sure, just call 0345 464 0079 or drop us an email and we will give you a straight answer.
Joints and surfaces we work on
- Brick reveals
- Period & listed homes
- Tenement windows
- Sash and case windows
- Timber door frames
- Stone surrounds
The process
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes anything from a few hours to a full day, depending on how many windows. For a job in Hampton Wick, 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 check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
How to prepare
- Mention any tricky access
- Clear items away from the joints we’re working on
- For indoor joints, keep the area dry beforehand if you can
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, phone 0345 464 0079 or drop us an email.
Related advice
Should I try it myself first?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Sand mastic in Hampton Wick: local notes
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In London conversions and blocks, the lease decides who is responsible for the frames, so check that before booking.
For landlords with property near Hampton Wick station, any sash windows need sound mastic to keep draughts and rain out. Hampton Wick is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Hampton Wick is about 3 miles south-east of Twickenham, in Greater London. Anywhere in KT1, we can carry out sand mastic at your property. Across Greater London, we cover 764 places, and Hampton Wick is one of them. For nearby work, see our London page (11 miles or so).
Here we cover the KT1, KT2 and TW11 postcode area for sand mastic. If you need sand mastic at a property on Park Road, Fife Road and East Road or a nearby road, our applicators can take on the job. If you’re just outside Hampton Wick, we cover Teddington (1 mile north-west), Ham (2 miles north), East Molesey (2 miles west), Strawberry Hill (2 miles north-west) and Hampton Hill (2 miles north-west). We also work in nearby towns such as London (11 miles north-east), City of Westminster (10 miles north-east), Marylebone (10 miles north-east), Kensington (8 miles north-east), St Pancras (11 miles north-east) and Shoreditch (13 miles north-east).
Landmarks near Hampton Wick
Around Hampton Wick, our work takes us to homes and buildings near Foresters Arms, Tiffin School and Kingston Grammar School. Hampton Wick has its own railway station: Hampton Wick station. Other landmarks nearby include Chessington Castle Hill (3.8 miles south) and Metropolitan Police Mounted Branch Museum (2.3 miles south-west). The countryside around Hampton Wick includes The Wood and The Lake.
How the job changes by surface
Timber door frames
Door frames get knocked and soaked and the mastic can crack early. It’s renewed by hand.
Stone surrounds
Sand mastic sits naturally against stone. It finishes to look like part of the surround.
Common problems we fix in Hampton Wick
Age is the main cause. Even well-laid mastic needs renewing in time, depending on exposure and upkeep.
Common reasons people contact us are:
- Wind and rain getting in round a sash window
- Mastic that needs renewing before redecorating
- Silicone on a period window that looks wrong
- Gaps where the frame meets the masonry
Managing a site like St John the Baptist Church of England Junior School? Then its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- The length of the guarantee
- Whether all the old sealant comes out first
- Which colour the sealant will be
- Who does the work, and how experienced they are
Leave it or put it right?
Gaps round a sash window let in rain and draughts. Left, water can reach the timber and the wall, so dealing with it now protects both. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in Hampton Wick.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
Why Hampton Wick clients choose us
- ARBOMaster approved applicator
- Domestic, commercial and hotel work
- Every job guaranteed for a year
- Neat joints and a tidy finish
Read how sealant jobs are priced and our reviews.
Your questions about sand mastic in Hampton Wick
Can you do sand mastic in Hampton Wick?
Yes. Our work covers London and the South East, and Hampton Wick is part of that. You can call 0345 464 0079 or email us and tell us what needs doing.
Is parking a problem for a job in Hampton Wick?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Can landlords and businesses book you?
Yes. We work in homes, commercial premises and hotels.
Is it OK to seal over old sealant?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Where is Mr Mastic based?
We are based in Crawley, and we work across South East England, London and Scotland.
Can you do several jobs on one visit?
Of course. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
Can you replace silicone on a period window with sand mastic?
Often, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
Is consent needed for window work on a listed home?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like, but they decide.