Oxfordshire · England
Sand mastic for sash & case windows in Aldworth, Oxfordshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Aldworth and across Oxfordshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic round period door frames that has failed
- Old cement repairs round a window that have failed
- Modern sealant on a period surround
What sealant work can’t fix
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Decisions on consent for listed homes
- Cracked or broken glass
- Crumbling stone or brickwork round the window
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before booking.
Where we work in Aldworth
- Period & listed homes
- Stone surrounds
- Brick reveals
- Tenement windows
- Sash and case windows
- Timber door frames
Sand mastic for homes and businesses in Aldworth
If your home is listed or in a conservation area, check with your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. Typical jobs include wind and rain getting in round a sash window and failed mastic on an exposed elevation, across sash and case windows, timber door frames and brick reveals.
Around Aldworth, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Where
- Aldworth (RG8)
- Region
- Oxfordshire
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Can I do it myself?
A DIY attempt doesn’t rule out a professional job. We cut it out and start again, so just mention it when you contact us.
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.
Also near Aldworth
Other services in Aldworth
The process
The work is kept neat and contained to the area we’re working on, so you can carry on as normal. Expect the work to take anything from a few hours to a full day, depending on how many windows, and we tell you how long to leave it before we go. Somewhere as small as Aldworth, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- 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.
- 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.
Preparing for the visit
- Tell us about any water getting in
- Mention if the joints have been sealed before
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
To get a quote, call 0345 464 0079 or email us with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Read more
Sand mastic in Aldworth: local notes
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. Historic houses like Basildon Park (about 3.6 miles east) are a reminder that the area around Aldworth has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Managing a site like The Downs School? Then its window and door frames need their mastic kept sound, just like a home’s. In the older streets around St Mary's church, the joint between an old wall and a newer frame is normally the first place rain gets in.
Aldworth is about 7 miles south of Didcot, in Oxfordshire. We carry out sand mastic for householders, landlords and businesses in Aldworth and the surrounding area, as part of our work across Oxfordshire. Aldworth is one of 443 places in Oxfordshire we cover for sand mastic. There’s also a page for Reading, about 11 miles away.
Postcode districts we cover here for sand mastic: RG8. Neighbouring places we cover for sand mastic include Compton (2 miles west), Woodway (3 miles north-west), Aston Tirrold (4 miles north), East Ilsley (4 miles west) and Blewbury (4 miles north). We also work in nearby towns such as Didcot (7 miles north), Abingdon-on-Thames (12 miles north), Wantage (11 miles north-west), Henley-on-Thames (13 miles east), Grove (12 miles north-west) and Benson (8 miles north-east).
Landmarks near Aldworth
Locally, jobs take us to homes and businesses close to The Bell Inn and the streets around them. For rail, the closest station is Goring & Streatley station, about 3 miles east. Nearby you will also find Hampstead Norris Castle (2.8 miles south-west). Not far away are Withymead Nature Reserve and Churn Hill.
Keeping the joints in good condition
A little care helps the new joints last. We recommend:
- Renew mastic before redecorating the windows
- Keep sills and gutters clear so water drains away
- Check with your local planning authority if your home is listed
- Don’t run silicone over sand mastic
Do not touch or press the mastic while it hardens. It forms a skin fairly soon but needs longer to fully harden.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
Different surfaces, different methods
Stone surrounds
Stone openings are rarely perfectly straight, so the gap isn’t the same all the way round. We shape it by hand to follow the stone.
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Why deal with it now?
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and finishes neatly against the masonry. Around Aldworth, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or send us an email.
Why book with us
- Neat joints and a tidy finish
- More than 20 years in sealant work
- Rated 4.9 stars on Google
- One-year guarantee on every job
Read how sealant jobs are priced or our reviews.
When to call us in Aldworth
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Most people get in touch when they notice something like this:
- Silicone on a period window that looks wrong
- Open joints round the window box
- Weathered mastic on the most exposed windows
- Draughts and rain around sash boxes
For landlords with property near Goring & Streatley station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Comparing quotes
- How hidden problems are handled
- How long the guarantee is
- What the quote includes, VAT included or not
- How the joint is cleaned and prepared
Questions from Aldworth
Is Aldworth within the area you cover?
Yes. Aldworth is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Aldworth in your area for sand mastic?
Yes, Aldworth is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
Is it messy?
We keep the work tidy. We protect what’s around the joints.
Where are you based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Can tenants book the work?
Yes, though it’s best to check with your landlord first. Landlords are often happy for the work to be arranged.
Can old silicone round a sash window be swapped for sand mastic?
Yes. We remove the silicone and clean the joint before the sand mastic goes in.
Do you guarantee sand mastic work?
Every job comes with our 12-month guarantee.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first, so the new sealant bonds properly.