Surrey · England
Sand Mastic in Wentworth
Specialist sand mastic for Wentworth: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Old cement repairs round a window that have failed
- Open joints round the window box
- A silicone bead on a sash window that spoils the look
Sand mastic in Wentworth, done properly
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. We work on sash and case windows, tenement windows and brick reveals, and common reasons people get in touch are mastic worn away on windows facing the weather and gaps between timber frames and stone or brick.
Homes in small places like Wentworth often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Wentworth (GU25)
- Wider area
- Surrey
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What affects the cost of sand mastic
The price is agreed before any work begins. It’s based on:
- The number of rooms or windows
- How much there is to do
- Mould in or behind the old joints
- The type of sealant required
Homes and businesses are quoted the same way: the amount of work, the access and the products needed. Ask us for a quote and we will go through it with you.
What we need to know
You do not need to know the technical terms. It helps if you can tell us:
- The type of property
- What’s wrong with the joints now
- Photos by email, if that is easy
- The rough size of the job
We do not publish a price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To get started, ring 0345 464 0079 or drop us an email.
Also near Wentworth
Also in Wentworth
Sand mastic in Wentworth: local notes
With historic houses such as Botleys Mansion (about 3.1 miles south-east) nearby, there’s older building stock in the area around Wentworth as well as newer homes. Where a home is older, 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, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For landlords with property near Longcross station, older sash windows in a rental need their mastic kept sound to keep the weather out. Homes close to Christ Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Wentworth is about 3 miles south-west of Egham, in Surrey. We provide sand mastic to homes and businesses in Wentworth and the surrounding area. Wentworth is one of 395 places in Surrey we cover for sand mastic. For nearby work, see our Reading page (17 miles or so).
Postcode districts we cover here for sand mastic: GU25. Local streets include London Road, Wentworth Drive and Portnall Rise, and we cover them all. Other places close to Wentworth include Virginia Water (1 mile east), Egham Wick (2 miles north), Stroude (2 miles north-east), Thorpe Green (2 miles east) and Englefield Green (2 miles north-east). Larger places within reach include Guildford (11 miles south), Woking (6 miles south), Camberley (7 miles south-west), Epsom (15 miles east), Ewell (15 miles east) and Egham (3 miles north-east).
Local landmarks in Wentworth
Around Wentworth, our work takes us to homes and buildings near Riverside Walk and the streets around them. For rail, the closest station is Longcross station, roughly 1 mile south. A little further out are St. Peter's Hospital (3.3 miles south-east) and Chobham Museum (3.7 miles south). Green spaces nearby include Gracious Pond and St Ann's Hill.
Your questions about sand mastic in Wentworth
Do you cover smaller places like Wentworth?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you work for landlords with property near Longcross station?
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 give you a clear price.
How long does sand mastic take to go off?
The surface skins quite quickly and it hardens fully over a longer time. The weather and joint depth both affect it.
Is it OK to seal over old sealant?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Is there any odour?
It depends on the product. Some products have a noticeable smell, others very little.
Do you take out the old sealant first?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. If you are redecorating the window, ask us first and we will talk you through it.
Will you leave a mess?
No. We protect the surfaces around the joints, and we tidy up before we go.
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
The process
At the end, we look at the finished work together and tell you how long to leave it. The visit itself normally takes a few hours for a single window, longer for several, depending on the size of the job. Somewhere as small as Wentworth, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Before we arrive
- Mention any tricky access
- Keep children and pets away from the work area
- Let us know about parking restrictions
How to get a quote
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or send us an email with the details.
Related advice
For landlords and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Keeping the joints in good condition
After the cure time, these simple habits help:
- Sort the mastic before the decorators arrive
- Ask the planning authority about consent for listed or conservation-area homes
- Avoid heavy scraping on the mastic joint
- Clear gutters so water does not pour onto the windows
Leave the new mastic unpainted, as traditional guidance advises. If you’re redecorating, ask us first.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
Do you need sand mastic in Wentworth?
Sand mastic slowly weathers. It hardens, cracks and starts to come away from the frame or the masonry.
People generally contact us when they notice something like this:
- Modern sealant on a period surround
- Tired mastic found when preparing windows for paint
- Gaps round a timber door in stone or brick
- Gaps where the frame meets the masonry
For site and facilities teams at buildings such as Christ Church CofE Aided Infant School, larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- How the joint is cleaned and prepared
- How hidden problems are handled
- How the colour is chosen
- Who turns up on the day
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 blends with the stone or brick. Older cottages and farmhouses around Wentworth can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
What you get with us
- Arbo and Everbuild products
- An ARBOMaster approved applicator
- Experience in homes, commercial sites and hotels
- Over 20 years’ experience
Read what affects the cost or our reviews.