Oxfordshire · England
Sand mastic for sash & case windows in Charlton, Oxfordshire
Problem with your window and door surrounds in Charlton? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Mastic dropping out of the joint
- Draughts and rain around sash boxes
- Modern sealant on a period surround
Sand mastic in Charlton
We work across Charlton renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. Common call-outs are for window mastic to renew ahead of painting and draughts and rain around sash boxes, across sash and case windows, stone surrounds and timber door frames.
Homes around Charlton range from older properties to newer houses, and their windows range just as widely. The right sealant depends on the frame and on what it sits in.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Place
- Charlton (OX12)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
Sealant isn’t the answer to every problem, and we will tell you before we start. It will not solve:
- Decisions on consent for listed homes
- Rotten sashes, sills or window boxes (a joiner’s job)
- Broken panes
If you are not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before booking.
Joints and surfaces we work on
- Timber door frames
- Tenement windows
- Stone surrounds
- Sash and case windows
- Period & listed homes
- Brick reveals
What sand mastic looks like in Charlton
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.
For site and facilities teams at buildings such as Charlton Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Charlton is about 7 miles west of Didcot, in Oxfordshire. Every kind of property in Charlton is covered for sand mastic. Every job comes with our 12-month guarantee. Charlton is one of 443 towns and villages in Oxfordshire we cover for sand mastic. There’s also a page for Oxford, roughly 13 miles from Charlton.
Work in OX12 is quoted and booked the same way as anywhere else. That includes homes and businesses on Grove Road, Little Lane and Ormond Road. Main roads around Charlton include the A417. Neighbouring places we cover for sand mastic include Wantage (1 mile west), East Challow (2 miles west), Letcombe Regis (2 miles south-west), West Challow (2 miles west) and Childrey (3 miles west). We also work in nearby towns such as Oxford (13 miles north-east), Didcot (7 miles east), Abingdon-on-Thames (8 miles north-east), Witney (14 miles north), Carterton (14 miles north-west) and Faringdon (8 miles north-west).
What’s near Charlton
Typical jobs here are in homes near Lord Nelson pub, King Alfred's and St Mary's School. A little further out are Williams F1 Grand Prix Collection (1.8 miles north). For a walk, there’s Letcombe Valley and Chain Hill.
Signs you need sand mastic in Charlton
Age is the main cause. Even well-laid mastic needs renewing in time, depending on exposure and upkeep.
These are the problems we’re asked about most:
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps round a timber door in stone or brick
- Old cement repairs round a window that have failed
- Draughts and rain around sash boxes
In the older streets around Holy Trinity Church, the joint between an old wall and a newer frame is normally the first place rain gets in.
What to look for in a quote
- What product goes in the joint
- How long to leave it before use
- Who turns up on the day
- What the quote includes, VAT included or not
Landlord and commercial work in Charlton
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together.
Hotels need rooms back in use, so the work can be planned room by room. We’ve worked in hotels as well as homes and businesses.
Questions from Charlton
Do you cover Charlton for sand mastic?
Yes, Charlton is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll send you a clear quote.
What guarantee comes with sand mastic in Charlton?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
What is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It combines sand with a linseed-oil-based binder.
How much does sand mastic cost in Charlton?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Can I do it myself?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
How long does sand mastic take to go off?
A skin forms quite soon, but full hardening takes longer. We will explain what to expect before we leave.
How long will you be here?
As a guide, most jobs take a few hours for a single window, longer for several. Larger jobs naturally take longer.
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.
What the job involves on each surface
Period and listed homes
Materials matter on listed and conservation-area homes. Sand mastic is often the preferred finish.
Timber door frames
Round a period front door, sand mastic gives the right look.
More services for Charlton
Aftercare tips
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Check with your local planning authority if your home is listed
- Clear gutters so water does not pour onto the windows
- Look over the window mastic once a year
- Go gently near the mastic when preparing windows
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry so early renewal protects both.
How it works
We bring everything the job needs with us, so you do not need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. Most jobs take anything from a few hours to a full day, depending on how many windows. Parking around Charlton is usually easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Let us know about stairs, lifts or work at height
- For indoor joints, keep the area dry beforehand if you can
How to get a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand.
Advice
DIY versus a professional finish
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.