Oxfordshire · England
Sand Mastic in Chilswell
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Chilswell and across Oxfordshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- A silicone bead on a sash window that spoils the look
- Mastic round period door frames that has failed
- Patchy fillers round a sash window
How we handle sand mastic in Chilswell
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. If you are dealing with weathered mastic on the most exposed windows and mastic dropping out of the joint, we can put it right.
Mastic can only go onto a dry, clean joint, so window work in Chilswell is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Whatever the size of the job, you get the same 12-month guarantee in Chilswell and across Oxfordshire.
- Place
- Chilswell (OX1)
- Wider area
- Oxfordshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
When it is not the sealant
We will always be straight with you, so here’s what sealant can’t fix:
- Sashes that rattle, stick or won’t open
- Putty and glazing repairs
- Damaged stone surrounds
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
- Sash and case windows
- Stone surrounds
- Timber door frames
- Tenement windows
- Period & listed homes
What affects the cost of sand mastic
Jobs vary more than people expect. The main factors:
- Whether the work is at height
- Whether old sealant or filler has to be cut out
- Working hours on commercial sites
- Which sealant suits the joint
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- If it’s domestic, commercial or a hotel
- Where the property is
- Pictures of the joints, sent by email
- Any previous sealing or DIY work
Every job is quoted individually, so start by telling us what you need. Just call 0345 464 0079 or send us an email with the details and send photos if you have them.
Nearby places to Chilswell
Other services in Chilswell
Work for landlords, hotels and businesses
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll quote.
Common problems we fix in Chilswell
Sand mastic slowly weathers. It dries out, cracks and loses its grip on the stone or timber.
Signs it’s time to call us include:
- Mastic dropping out of the joint
- Gaps between timber frames and stone or brick
- Failed mastic on an exposed elevation
- Window mastic to renew ahead of painting
For landlords with property near Oxford station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Before you book anyone
- How long to leave it before use
- Who does the work, and how experienced they are
- Whether VAT is included
- Whether all the old sealant comes out first
What happens if it’s left?
New mastic over crumbling mastic won’t hold. We remove the loose material first so the new mastic stays put. Around Chilswell, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
What you get with us
- Arbo and Everbuild products
- Experience in homes, commercial sites and hotels
- Approved under the ARBOMaster scheme
- Old sealant always removed completely
How the visit works
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The work itself takes a few hours per window, depending on the condition of the joints. For a village or hamlet like Chilswell, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Mention any tricky access
- Tell us if parking is tricky
- Let us know if you’ve seen damp or leaks
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.
Advice
Different surfaces, different methods
Timber door frames
Period doors in stone or brick openings are often pointed with sand mastic. The method is the same as for windows.
Stone surrounds
Old stone surrounds are often uneven, so the joint varies in width. We shape it by hand to follow the stone.
Questions from Chilswell
Can you do sand mastic in Chilswell?
Yes, Chilswell is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing.
Do you work for landlords with property near Oxford station?
Yes, landlords and agents are among the people we work for. Just ring 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear price.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply phone 0345 464 0079 or email us.
Do you guarantee sand mastic work?
Every job comes with our one-year guarantee, and we’re fully insured.
Do I need permission for sand mastic on a listed building?
It’s best to ask your local planning authority first. Like-for-like sand mastic is often the preferred finish, but they decide.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
Does someone need to be in?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
What sand mastic looks like in Chilswell
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Holywell Manor (about 2.6 miles north-east) are a reminder that the area around Chilswell 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’s traditional sand mastic.
Managing a site like Matthew Arnold School? Then larger buildings have plenty of frames, and the mastic around each one ages. In the older streets around Church of St Lawrence, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Chilswell is about 3 miles south-west of Oxford, in Oxfordshire. Homes, rented property, offices and hotels in Chilswell can book us for sand mastic, old or new, large or small. Every job comes with our one-year guarantee. Our area takes in 443 places across Oxfordshire.
Postcode districts we cover here for sand mastic: OX1. Neighbouring places we cover for sand mastic include Boars Hill (1 mile south), Hinksey Hill (1 mile east), Harcourt Hill (1 mile north), South Hinksey (1 mile north-east) and Bayworth (1 mile south). Within a short drive, we also cover Oxford (3 miles north-east), Didcot (8 miles south), Bicester (13 miles north-east), Abingdon-on-Thames (3 miles south), Witney (10 miles north-west) and Carterton (13 miles west).
Landmarks near Chilswell
Locally, jobs take us to homes and businesses close to Raleigh Park and the streets around them. Chilswell’s nearest station is Oxford station, roughly 2 miles north. Nearby you’ll also find Westgate Shopping Centre (2 miles north-east) and Radcliffe Infirmary (2.6 miles north-east). For a walk, there’s Harcourt Hill and Lashford Lane Fen.