Oxfordshire · England
Sand mastic for sash & case windows in Bow, Oxfordshire
Our applicators work in Bow on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Old cement repairs round a window that have failed
- Weathered mastic on the most exposed windows
- Gaps where the frame meets the masonry
How we handle sand mastic in Bow
On many period windows, sand mastic looks right and suits the building. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. Typical jobs include failed mastic on an exposed elevation and old sand mastic that has cracked, crumbled or fallen out, on timber door frames, period & listed homes and tenement windows.
Somewhere as small as Bow, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
Your job is guaranteed for a year, as with all our work.
- Location
- Bow (SN7)
- Wider area
- Oxfordshire
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of sand mastic
You will get a clear quote before work begins. It’s based on:
- The size of the job
- Which sealant suits the joint
- The number of rooms or windows
- Whether the work is at height
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
What to tell us for a quote
When you call or email, these details help:
- A few pictures by email, if you can
- Whether it has been sealed before
- What the problem is, such as mould, gaps, leaks or cracking
- Roughly how big the job is
Need a quote? Please phone 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
How the job changes by surface
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we will confirm what’s needed.
How the visit works
The work is kept neat and contained to the area we’re working on. The job usually takes a few hours per window, depending on the condition of the joints, and we tell you how long to leave it before we go. In a small place like Bow, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic is not too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- For business premises, tell us about site rules or sign-in
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you are ready, ring 0345 464 0079 or drop us an email.
Advice
What we can’t put right
Before you book, it’s worth knowing the limits too:
- Cracked or broken glass
- Damaged stone surrounds
- Sash cords, weights and draught-proofing of the sashes
If you are not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
Where we work in Bow
- Period & listed homes
- Timber door frames
- Stone surrounds
- Sash and case windows
- Tenement windows
- Brick reveals
For landlords and businesses
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will quote.
More services for Bow
FAQs for Bow
Is Bow in your area for sand mastic?
Yes, Bow is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job.
Is sand mastic in Bow guaranteed?
Every job comes with our one-year guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
How long does the job take?
It depends on the size of the job, but most jobs take anything from a few hours to a full day, depending on how many windows. We’ll give you a better idea when we quote.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Should I check with the council before work on a listed or conservation-area home?
Check with your local planning authority. They’ll tell you if consent is needed for work to your windows.
How do I get a quote for sand mastic in Bow?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or drop us an email with a short description of the job.
Is there any odour?
It depends on the product. Some products have a noticeable smell, others very little, and any smell fades as they cure.
What’s sand mastic made of?
Sand plus a binder based on linseed oil. It’s applied by hand and finished to sit neatly against the masonry.
Signs you need sand mastic in Bow
Water gets into small cracks in the mastic and pushes it out. Exposed elevations normally fail first.
Look out for any of the following:
- Cracked mastic round a front door frame
- Mastic worn away on windows facing the weather
- Gaps between timber frames and stone or brick
- Draughts and rain around sash boxes
Managing a site like Stanford in the Vale Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- What preparation is included
- What insurance they hold
- Whether they seal over old material or remove it
- What product goes in the joint
What happens if it’s left?
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic suits the building and finishes neatly against the masonry. Around Bow, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first.
Why Bow customers choose us
- 12-month guarantee on every job
- Old sealant always removed completely
- Tidy, careful work
- Fully insured
Take a look at what affects the cost or our reviews.
Bow homes and the weather
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Longworth House (about 4.3 miles north-east) nearby, there’s older building stock in the area around Bow as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Homes close to Church of St Denys include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Bow is about 4 miles east of Faringdon, in Oxfordshire. From the centre of Bow to the outskirts, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. 443 places in Oxfordshire are on our list. You can also see our page for Oxford, roughly 14 miles from Bow.
Every address in SN7 is within our area for sand mastic. Sand mastic is available to properties on Chapel Road, High Street and Sheards Lane. We also cover Stanford in the Vale (1 mile west), Hatford (1 mile north-west), Shellingford (2 miles west), Baulking (2 miles south-west) and Buckland (3 miles north). We also work in nearby towns such as Oxford (14 miles north-east), Didcot (11 miles east), Abingdon-on-Thames (10 miles east), Witney (10 miles north), Carterton (10 miles north-west) and Wantage (5 miles south-east).
Landmarks near Bow
Around Bow, our work takes us to homes and buildings near Former Red Lion Public House and Holy Trinity Church and the streets around them. Nearby you’ll also find Faringdon Museum (3.8 miles west) and Faringdon Castle (3.4 miles north-west).