Oxfordshire · England
Sand mastic for sash & case windows in Farmoor, Oxfordshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Farmoor, with a 12-month guarantee on every job. Call for a quick quote.
- Mastic worn away on windows facing the weather
- Tired mastic found when preparing windows for paint
- Draughty sash windows at the surround
Sand mastic in Farmoor, done properly
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. We work on sash and case windows, period & listed homes and timber door frames, and common reasons people get in touch are tired mastic found when preparing windows for paint and silicone on a period window that looks wrong.
Somewhere as small as Farmoor, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
Each job carries a 12-month guarantee, large or small.
- Where
- Farmoor (OX2)
- Wider area
- Oxfordshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Farmoor: your questions answered
Can you do sand mastic in Farmoor?
Yes, Farmoor is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
Is Farmoor within the area you cover?
Yes, Farmoor is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Farmoor, along with the rest of our area.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Are you insured?
Yes. We’re fully insured.
Is it possible to take out silicone and use sand mastic instead?
In most cases. We remove the silicone and clean the joint before the sand mastic goes in.
How long does sand mastic take?
Typically it takes a few hours for a single window, longer for several. Larger jobs naturally take longer, and we’ll tell you how long to expect.
Is consent needed for window work on a listed home?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for listed or conservation-area properties.
Why it’s worth doing now in Farmoor
Replacing sash windows is a big decision for a period home, and in listed buildings it may need consent. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Older cottages and farmhouses around Farmoor can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before work begins.
Why Farmoor clients choose us
- Neat joints and a tidy finish
- Full insurance on every job
- 20+ years of sealant experience
- Quality sealants from Arbo and Everbuild
Read what affects the cost or what customers say.
What happens on the day
There’s no need to move everything out, only the area right around the joints. Everything nearby is protected, and the job takes a few hours per window, depending on the condition of the joints in most cases. In a small place like Farmoor, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Before we arrive
- Mention any tricky access
- Keep pets and children clear of the area while we work
- Mention any parking rules near the property
How to get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or email us.
Advice
Nearby places to Farmoor
Also in Farmoor
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Should I try it myself first?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What sand mastic looks like in Farmoor
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Appleton Manor (about 3.5 miles south) are a reminder that the area around Farmoor has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Letting a property close to Oxford station? Then older sash windows in a rental need their mastic kept sound to keep the weather out. Managing a site like Bartholomew School? Then its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near St Mary's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Farmoor is about 5 miles west of Oxford, in Oxfordshire. Homes, rented property, offices and hotels in Farmoor is covered for sand mastic. Every job comes with our one-year guarantee. Across Oxfordshire, we cover 443 places, and Farmoor is one of them.
Here we cover the OX2 postcode area for sand mastic. Whether your property is on Mayfield Road, Oxford Road and Meadow Close or anywhere close by, our applicators can take on the job. We also cover the places around Farmoor: Filchampstead (1 mile south), Swinford (1 mile north-west), Dean Court (2 miles south-east), Eynsham (2 miles north-west) and Wytham (2 miles north-east). We also work in nearby towns such as Oxford (5 miles east), Didcot (11 miles south-east), Bicester (13 miles north-east), Abingdon-on-Thames (6 miles south-east), Witney (6 miles west) and Carterton (10 miles west).
What’s near Farmoor
The closest station to Farmoor is Oxford station, about 3.4 miles east. Well-known places in the area include Oxford University Press Museum (3.6 miles east) and Radcliffe Infirmary (3.7 miles east). The countryside around Farmoor includes Hook Meadow and The Trap Grounds and Cumnor Hill.
When something else is needed
It helps to know what we cannot do too:
- Timber that has rotted
- Sashes that need overhauling
- Decisions on consent for listed homes
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
What we seal
- Brick reveals
- Tenement windows
- Timber door frames
- Period & listed homes
- Stone surrounds
- Sash and case windows
Aftercare tips
To keep the joints looking good and working properly:
- Leave the new mastic unpainted
- Find out about consent before window work on a listed home
- Sort the mastic before the decorators arrive
- Do not run silicone over sand mastic
Avoid painting over the new mastic, which is the traditional advice. Ask us before any decorating around it.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
How the job changes by surface
Sash and case windows
The mastic round a sash window is on show so we finish it carefully.
Brick reveals
We rake out the old mastic and pack deep voids before the new mastic goes in.