Oxfordshire · England
Sand mastic for sash & case windows in Steventon, Oxfordshire
Specialist sand mastic for Steventon: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Wind and rain getting in round a sash window
- Modern sealant on a period surround
- Gaps where the frame meets the masonry
Surface by surface
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Sand mastic in Steventon
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. If you’re dealing with silicone on a period window that looks wrong and mastic round period door frames that has failed, we can put it right, on brick reveals, tenement windows and period & listed homes alike.
Homes in small places like Steventon often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Place
- Steventon (OX13)
- Wider area
- Oxfordshire
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
You don’t need to clear the whole room or building before we come, only the area right around the joints. Everything nearby is protected, and the work takes a few hours for a single window, longer for several for a typical job. Somewhere as small as Steventon, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- Keep children and pets away from the work area
- Try not to wet indoor joints just before the visit
- On commercial sites, let us know about site rules
How to get a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Advice
Nearby places to Steventon
More services for Steventon
FAQs for Steventon
Do you cover Steventon for sand mastic?
Yes. Our work covers London and the South East, and Steventon is part of that. You can call 0345 464 0079 or email us and let us know what needs doing.
I let a flat near Didcot Parkway station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status, and we’re fully insured.
Is the work guaranteed?
There’s a 12-month guarantee on every job, sand mastic included.
What do you need from me for a quote?
Let us know what needs doing and where. If we need more, we will ask.
Should I check with the council before work on a listed or conservation-area home?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like but the decision is theirs.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Do I need to be at home?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
When something else is needed
In fairness, some problems need a different trade:
- Damaged stone surrounds
- Rotten sashes, sills or window boxes (a joiner’s job)
- Whether work needs listed building consent
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer.
What we seal
- Timber door frames
- Sash and case windows
- Brick reveals
- Period & listed homes
- Stone surrounds
- Tenement windows
Why it’s worth doing now in Steventon
Cement-based fillers and modern sealants don’t always suit a period surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. Where a wall is exposed, as many are in small places like Steventon, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will go through it with you.
What you get with us
- Anti-fungal sanitary silicone in wet areas
- Old sealant always removed completely
- Rated 4.9 stars on Google
- Arbo and Everbuild products
Take a look at how sealant jobs are priced or our reviews.
Landlord and commercial work in Steventon
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll quote.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Keeping the joints in good condition
Aftercare is simple, and it makes a real difference:
- Keep modern sealant off the mastic
- Check the mastic when you check the paintwork
- Get any rot dealt with first
- Renew mastic before redecorating the windows
Leave the new mastic alone while it firms up. It forms a skin fairly soon but needs longer to fully harden.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry so early renewal protects both.
What sand mastic looks like in Steventon
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as St Michael's Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Didcot Parkway station? Then any sash windows need sound mastic to keep draughts and rain out.
Steventon is about 3 miles west of Didcot, in Oxfordshire. From the centre of Steventon to the outskirts, we cover sand mastic for every kind of property. Steventon is one of 443 towns and villages in Oxfordshire we cover. For nearby work, see our Oxford page (10 miles or so).
Our applicators cover all of OX13 for sand mastic and the streets around it. We cover properties on High Street, St Michael's Way and Hanney Road and the roads around them. If you are just outside Steventon, we cover Milton Heights (1 mile south-east), Milton Hill (1 mile south-east), Drayton (2 miles north), Sutton Wick (2 miles north-east) and Marcham (3 miles north). Further out, we also cover Oxford (10 miles north-east), Didcot (3 miles east), Abingdon-on-Thames (4 miles north-east), Witney (13 miles north-west), Carterton (15 miles north-west) and Wantage (5 miles south-west).
Around Steventon
Around Steventon, our work takes us to homes and buildings near The North Star Public House. The nearest railway station is Didcot Parkway station, roughly 3.6 miles east. Nearby you will also find FitzHarris Castle (3.9 miles north-east) and Atlas Computer Laboratory (3.5 miles south). Green spaces nearby include Chain Hill and Mowbray Fields.
Signs you need sand mastic in Steventon
Paint, silicone or cement used over old mastic causes problems. They do not move with the timber and we normally remove them.
If you can see any of these, it’s time to have the joints looked at:
- Modern sealant on a period surround
- Gaps round a timber door in stone or brick
- Old cement repairs round a window that have failed
- Gaps between timber frames and stone or brick
For an older house near a landmark such as Church of St Michael and All Angels, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What your quote should include
- Who turns up on the day
- What guarantee comes with the work
- Is VAT in the price?
- Whether you can choose the colour