Oxfordshire · England
Weston-on-the-Green Sand Mastic
Sand mastic for Weston-on-the-Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Wind and rain getting in round a sash window
- Crumbling sand mastic round a window
- Gaps between timber frames and stone or brick
Sand mastic for homes and businesses in Weston-on-the-Green
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. If you’re dealing with open joints round the window box and cement or filler used on old window joints that has cracked, we can help.
Around Weston-on-the-Green, 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.
A one-year guarantee comes as standard.
- Where
- Weston-on-the-Green (OX25)
- Region
- Oxfordshire
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
Every visit runs the same way: we check the joints, protect the area around them, do the work and tidy away. Most jobs take anything from a few hours to a full day, depending on how many windows. In a small place like Weston-on-the-Green, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- On commercial sites, let us know about site rules
- Move anything stored near the joints
How to get a quote
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or email us with the details and send pictures if you have them.
Read more
Do you need sand mastic in Weston-on-the-Green?
Timber swells and shrinks with the weather. The movement cracks the mastic little by little.
The problems people generally mention when they call are:
- Weathered mastic on the most exposed windows
- Draughts and rain around sash boxes
- Mastic round period door frames that has failed
- Modern sealant on a period surround
For an older house near a landmark such as Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Before booking anyone
- How long the guarantee is
- Whether all the old sealant comes out first
- Whether VAT is included
- Whether they’re fully insured
Surface by surface
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Common questions in Weston-on-the-Green
Do you cover smaller places like Weston-on-the-Green?
Yes, Weston-on-the-Green is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you do sand mastic in Weston-on-the-Green?
Yes, Weston-on-the-Green is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job.
Will it make a mess?
We keep the work tidy. Nearby surfaces are protected.
Do you remove the old sealant?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
What guarantee comes with the work?
All our work has a one-year guarantee, and we’re fully insured.
What exactly is sand mastic?
Sand plus a binder based on linseed oil. It’s applied by hand and finished to sit neatly against the masonry.
How do I get a quote for sand mastic in Weston-on-the-Green?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before any work starts.
Looking after it afterwards
Simple care keeps the joints in good condition. We recommend:
- Sort the mastic before the decorators arrive
- Find out about consent before window work on a listed home
- Take care around the mastic when scraping paint
- Ask us before painting near the mastic
Do not run silicone over the new mastic. If you see a crack, ask us to take a look before trying a quick fix.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
Frames and glazing around Weston-on-the-Green
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Islip station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Weston-on-the-Green is about 4 miles south-west of Bicester, in Oxfordshire. From the centre of Weston-on-the-Green to the outskirts, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. Weston-on-the-Green is one of 443 towns and villages in Oxfordshire where we work for sand mastic. You can also see our page for Oxford, roughly 8 miles from Weston-on-the-Green.
We work across the OX25 postcode area for sand mastic and the streets around it. We cover properties on Church Road, Blacksmiths Close and Westlands Avenue. We also cover the places around Weston-on-the-Green: Weston Otmoor (1 mile east), Bletchingdon (2 miles west), Kirtlington (2 miles west), Hampton Poyle (3 miles south-west) and Islip (3 miles south). Within a short drive, we also cover Oxford (8 miles south), Banbury (15 miles north), Bicester (4 miles north-east), Abingdon-on-Thames (13 miles south), Witney (12 miles south-west) and Thame (14 miles south-east).
Local landmarks in Weston-on-the-Green
The nearest railway station is Islip station, roughly 2.7 miles south of the centre. Other landmarks nearby include Bicester Community Hospital (3.7 miles north-east) and Bicester Avenue (3.2 miles north-east). The countryside around Weston-on-the-Green includes Woodsides Meadow and Graven Hill.
Honest limits
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- Decayed frames that need repair
- Sash cords, weights and draught-proofing of the sashes
- Putty and glazing repairs
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before booking.
What we seal
- Brick reveals
- Tenement windows
- Period & listed homes
- Timber door frames
- Sash and case windows
- Stone surrounds
Should I try it myself first?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Towns and villages near Weston-on-the-Green
Also in Weston-on-the-Green
For landlords and businesses
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.