Windsor and Maidenhead · England
Sand Mastic in Brookside
We cover Brookside for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Cracked mastic round a front door frame
- A silicone bead on a sash window that spoils the look
- Cement or filler used on old window joints that has cracked
Sand mastic in Brookside, done properly
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. Common call-outs are for mastic round period door frames that has failed and patchy fillers round a sash window, across stone surrounds, brick reveals and tenement windows.
Around Brookside, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- Brookside (SL5, SL4)
- Wider area
- Windsor and Maidenhead
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. It usually takes a few hours per window, depending on the condition of the joints. For a village or hamlet like Brookside, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We check the window surrounds and agree which joints need renewing.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
Before we arrive
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
- Tell us about any water getting in
Getting a quote
For sand mastic in Brookside, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Advice
Quotes for sand mastic in Brookside
Your quote is based on your job. We look at:
- Whether there’s mould to deal with
- Any working-time requirements on site
- The type of sealant required
- How many areas need sealing
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
What to tell us for a quote
To make quoting easier, let us know:
- Access, such as stairs, a lift or height
- A few photos by email, if you can
- Whether it has been sealed before
- What the problem is, such as mould, gaps, leaks or cracking
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, call 0345 464 0079 or drop us an email.
FAQs for Brookside
Can you help a landlord with a rental near Ascot station?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Can you do sand mastic in Brookside?
Yes. We work across London and the South East, and Brookside is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll give you a clear quote.
Will the old sealant be removed?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
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 doesn’t work out, we can redo it.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Can you seal over the old sealant?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
How long does sand mastic take to go off?
It takes a while. The skin forms first, and the full set comes later and we will give you an idea for your job.
How to look after the new joints
A little care helps the new joints last. We recommend:
- Go gently near the mastic when preparing windows
- Ask the planning authority about consent for listed or conservation-area homes
- Keep modern sealant off the mastic
- Plan mastic work ahead of painting
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at rather than patching it.
An open joint round the box lets weather through. Left, the gap tends to get bigger as more mastic falls out.
Different surfaces, different methods
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
Door frames get knocked and soaked and the mastic can crack early. It’s renewed by hand.
Work for landlords, hotels and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
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.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Also near Brookside
Other services in Brookside
Frames and glazing around Brookside
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as St Leonard's Hill (about 3.2 miles north-east) nearby, there’s older building stock in the area around Brookside as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Schools such as Papplewick School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s. Homes close to Chapel of St Mary and St John include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Brookside is about 3 miles east of Wick Hill, in Windsor and Maidenhead. Every kind of property in Brookside is covered for sand mastic, old or new, large or small. Every job comes with our 12-month guarantee. Across Windsor and Maidenhead, we cover 57 places, and Brookside is one of them. We also work in Reading, about 13 miles from Brookside.
Here we cover the SL5 and SL4 postcode area for sand mastic. We cover properties on New Road, The Avenue and Coach Road. Close by, we work in North Ascot (1 mile south-west), Plaistow Green (1 mile north), Woodside (1 mile north-east), Ascot (1 mile south-east) and Winkfield (1 mile north-west). Further out, we also cover Maidenhead (7 miles north), Windsor (4 miles north-east), Boyn Hill (6 miles north-west), Cookham (9 miles north), Furze Platt (8 miles north) and Dedworth (4 miles north).
What’s near Brookside
Locally, jobs take us to homes and businesses close to Ascot Heath Church of England Junior School and Royal Hunt pub, among other places. The nearest railway station is Ascot station, about 1.3 miles south. A little further out are Heatherwood Hospital (1 mile south) and The Lexicon (3 miles west). Open spaces near Brookside include Virginia Water Lake.
Common problems we fix in Brookside
Paint, silicone or cement used over old mastic causes problems. They don’t suit the joint, and they normally need raking out.
Keep an eye out for any of the following:
- Mastic round period door frames that has failed
- Tired mastic found when preparing windows for paint
- Mastic dropping out of the joint
- Patchy fillers round a sash window
For landlords with property near Ascot station, older sash windows in a rental need their mastic kept sound to keep the weather out.
What to look for in a quote
- What insurance they hold
- What happens if the job turns out different
- How the joint is cleaned and prepared
- Whether the sealant suits the joint