Bracknell Forest · England
Sand mastic for sash & case windows in Hanworth, Bracknell Forest
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Hanworth, with a 12-month guarantee on every job. Call for a quick quote.
- Silicone on a period window that looks wrong
- Gaps where the frame meets the masonry
- Draughty sash windows at the surround
When it is not the sealant
New sealant can’t fix everything, and we’ll tell you before we start. It won’t solve:
- Sash cords, weights and draught-proofing of the sashes
- Decisions on consent for listed homes
- 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.
Joints and surfaces we work on
- Stone surrounds
- Timber door frames
- Period & listed homes
- Sash and case windows
- Tenement windows
- Brick reveals
About our sand mastic in Hanworth
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. We work on tenement windows, sash and case windows and stone surrounds, and people most often call us about wind and rain getting in round a sash window and modern sealant on a period surround.
Houses in smaller places like Hanworth can stand more in the open than those in a built-up town. The mastic around frames on those walls tends to age faster.
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
- Hanworth (RG12, RG40)
- Region
- Bracknell Forest
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
DIY versus a professional finish
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.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Nearby places to Hanworth
What else we do in Hanworth
Do you need sand mastic in Hanworth?
Over the years, sand mastic weathers. It hardens, cracks and starts to come away from the frame or the masonry.
Keep an eye out for any of the following:
- Mastic round period door frames that has failed
- Silicone on a period window that looks wrong
- Gaps where the frame meets the masonry
- Mastic worn away on windows facing the weather
If you live in an older home near St Michael and St Mary Magdalene's Church, the joint between an old wall and a newer frame is usually the first place rain gets in.
Comparing quotes
- Which sealant they’ll use, and why
- Whether you can choose the colour
- How long the guarantee is
- What the cure time is
For landlords and businesses
If you manage several properties in or around Hanworth, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can go on one quote.
Your questions about sand mastic in Hanworth
Is Hanworth within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Bracknell station?
Yes, we work for landlords and agents. You can phone 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 sand mastic be painted?
It’s traditionally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages to suit the site.
Is the work guaranteed?
There’s a 12-month guarantee on every job, sand mastic included.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
How much does sand mastic cost in Hanworth?
It depends on the job, so we quote each one individually. To get one, call 0345 464 0079 or email us with a short description of the job.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
The process
On the day, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before we start. The work normally takes a few hours for a single window, longer for several. For a job in Hanworth, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
- Mention any leaks or damp you’ve noticed
Getting a quote
Getting a quote is simple: tell us what needs doing and where. Photos by email help us understand the job, and we’ll take it from there.
Related advice
What affects the cost of sand mastic
We do not publish a price list. What we look at:
- The size of the job
- Whether old sealant or filler has to be cut out
- Whether there’s mould to deal with
- Whether the work is at height
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you’re unsure, ring 0345 464 0079 or email us and we’ll give you an honest view and a quote.
What to tell us for a quote
Before you ask for a quote, have a think about:
- What the problem is, such as mould, gaps, leaks or cracking
- How many joints, rooms or windows are involved
- If it’s domestic, commercial or a hotel
- Where the property is
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
Windows and doors in Hanworth
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Hanworth is part of Bracknell, one of the post-war new towns. Many homes date from the post-war decades, and many will have had their original windows replaced. The mastic around replacement frames ages too, and gaps at sills and frame heads are where water gets in.
Managing a site like The Pines School? Then larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Bracknell station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Hanworth is about 1 mile south of Bracknell, in Bracknell Forest. For sand mastic in and around Hanworth, it’s easy to get a quote: please ring 0345 464 0079 or email us. We’re based in Crawley and cover Bracknell Forest, Hanworth included. Across Bracknell Forest, we cover 41 places, and Hanworth is one of them. Our Reading page covers work nearby.
We cover every part of RG12 and RG40 for sand mastic. We cover properties on Hanworth Road, Waterham Road and Crowthorne Road. Close by, we work in Birch Hill (1 mile east), Wooden Hill (1 mile west), Great Hollands (1 mile north-west), Home Farm (1 mile west) and Crown Wood (1 mile north-east). Further out, we also cover Sandhurst (3 miles south), Lawrence Hill (3 miles north), Binfield (3 miles north), Quelm Park (3 miles north), Whitegrove (3 miles north-east) and College Town (4 miles south).
Landmarks near Hanworth
In Hanworth, that means homes and buildings near Easthampstead Park Community School, The Brakenhale School and Golden Retriever pub and the streets around them. The closest station to Hanworth is Bracknell station, about 1.5 miles north of the centre. A little further out are Pinewood Hospital (1.5 miles west) and Small Arms School Corps Weapons Collection (3.6 miles south). Open spaces near Hanworth include Wildmoor Heath and Heath Lake.
How to look after the new joints
Looking after new joints is easy:
- Plan mastic work ahead of painting
- Keep modern sealant off the mastic
- Leave the new mastic unpainted
- Take care around the mastic when scraping paint
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.