Oxfordshire · England
Sand mastic for sash & case windows in Tetsworth, Oxfordshire
Window and door surrounds in Tetsworth need attention? We remove the old material, prepare the joints and seal them properly.
- Failed mastic on an exposed elevation
- Open joints round the window box
- Old cement repairs round a window that have failed
Surface by surface
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Sand mastic in Tetsworth, done properly
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. We work on period & listed homes, stone surrounds and brick reveals, and the jobs we see most are mastic round period door frames that has failed and tired mastic found when preparing windows for paint.
Outdoor sealant needs dry, clean surfaces, so work on frames around Tetsworth is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
All our work is covered by a one-year guarantee.
- Place
- Tetsworth (OX9)
- Region
- Oxfordshire
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
The process
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, carry out the job and clear up. It usually takes a few hours for a single window, longer for several. In a small place like Tetsworth, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
Before we arrive
- Move anything stored near the joints
- Mention if the joints have been sealed before
- Plan for the work area to be out of bounds to pets and children
How to get a quote
For sand mastic in Tetsworth, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before we start.
Advice
Towns and villages near Tetsworth
More services for Tetsworth
Windows and doors in Tetsworth
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Adwell House (about 1.4 miles south) are a reminder that the area around Tetsworth has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Rented homes near Haddenham & Thame Parkway station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. Schools such as Tetsworth Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Tetsworth is about 3 miles south-west of Thame, in Oxfordshire. For sand mastic in and around Tetsworth, please phone 0345 464 0079 or send us an email for a quick quote. We cover Oxfordshire from our Crawley base. Tetsworth is one of 443 towns and villages in Oxfordshire where we work for sand mastic. We also work in Oxford, around 10 miles away.
All of OX9 is within our area for sand mastic, from the main roads to the quietest streets. Sand mastic is available to properties on High Street, Swan Gardens and Back Street and the roads around them. If you’re just outside Tetsworth, we cover North Weston (2 miles north), Milton Common (3 miles north-west), Albury (3 miles north-west), Great Haseley (3 miles west) and Tiddington (3 miles north-west). Larger places within reach include Oxford (10 miles west), Didcot (12 miles south-west), Bicester (15 miles north-west), Abingdon-on-Thames (12 miles west), Thame (3 miles north-east) and Henley-on-Thames (13 miles south).
Around Tetsworth
Locally, jobs take us to homes and businesses close to The Swan pub and the streets around them. For rail, the closest station is Haddenham & Thame Parkway station, roughly 5 miles north-east of the centre. Other landmarks nearby include Thame Museum (2.9 miles north) and Thame Community Hospital (2.8 miles north-east). Open spaces near Tetsworth include Wells Farm and Bald Hill.
What affects the quote in Tetsworth
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Whether old sealant or filler has to be cut out
- Whether there’s mould to deal with
- How many areas need sealing
- Access and height
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Call for a quick quote and we’ll explain what it covers.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Any access issues, like height or stairs
- Where the property is
- What’s wrong with the joints now
- A few pictures by email, if you can
Getting a quote is simple: let us know the job and the location. Photos by email help us understand the job.
Why act early in Tetsworth
If you are redecorating, renew the mastic first. Paint over cracked mastic will not stop the gaps and traditional guidance is to leave the new mastic unpainted. Older cottages and farmhouses around Tetsworth can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and give you a clear quote before any work starts.
Why Tetsworth customers choose us
- Anti-fungal sanitary silicone in wet areas
- Over 20 years’ experience
- Experience in homes, commercial sites and hotels
- A 12-month guarantee on all work
Read what affects the cost or customer reviews.
Common problems we fix in Tetsworth
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
Look out for any of the following:
- Weathered mastic on the most exposed windows
- Mastic round period door frames that has failed
- Crumbling sand mastic round a window
- Mastic that needs renewing before redecorating
In the older streets around Church of St Giles, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Questions to ask before you book
- What the cure time is
- Whether the sealant suits the joint
- How long the guarantee is
- Whether all the old sealant comes out first
How to look after the new joints
Looking after new joints is easy:
- Ask us before painting near the mastic
- Sort the mastic before the decorators arrive
- Inspect the joints round the windows every year or so
- Go gently near the mastic when preparing windows
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
FAQs for Tetsworth
Can you help a landlord with a rental near Haddenham & Thame Parkway station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before we start.
Will you come out to Tetsworth?
Yes, we do. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
How much does sand mastic cost in Tetsworth?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before we start.
Can new sealant go over the old?
No, it will not last. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
What do you need from me for a quote?
Only a few details: where it is, what you’ve noticed and how we reach it. Then ring 0345 464 0079 or drop us an email.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Do I have to be there?
If the work is inside, we need someone to let us in. Once we have agreed the job, you do not need to watch us work.
How long does sand mastic take to harden?
Not straight away. The skin forms first, and the full set comes later and we’ll give you an idea for your job.
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.