Oxfordshire · England
Sand Mastic in Great Tew
Professional sand mastic in and around Great Tew, with old sealant always removed completely.
- A silicone bead on a sash window that spoils the look
- Wind and rain getting in round a sash window
- Failed mastic on an exposed elevation
Sand mastic in Great Tew, done properly
If your home is listed or in a conservation area, check with your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. If you have mastic dropping out of the joint and open joints round the window box, we can help, on tenement windows, timber door frames and period & listed homes alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Great Tew is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- Great Tew (OX7)
- Region
- Oxfordshire
- Cover
- 12 months on all our work
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Sand mastic in Great Tew: local notes
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.
If you look after a building such as Great Tew County Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Great Tew is about 8 miles south-west of Banbury, in Oxfordshire. From the centre of Great Tew to the outskirts, sand mastic is available for homes and businesses alike. Our area takes in 443 places across Oxfordshire, large and small. Oxford is on our list too, about 17 miles from Great Tew.
All of OX7 is covered for sand mastic. Local streets include The Square, Old Road and New Road, and we cover them all. Other places close to Great Tew include Little Tew (1 mile south-west), Swerford (2 miles north-west), Wigginton (2 miles north), South Newington (3 miles north) and Church Enstone (3 miles south). Within a short drive, we also cover Banbury (8 miles north-east), Bicester (12 miles east), Witney (12 miles south), Carterton (15 miles south-west), Kidlington (11 miles south-east) and Bure Park (12 miles east).
What’s near Great Tew
Locally, jobs take us to homes and businesses close to The Falkland Arms Public House and the streets around them. Well-known places in the area include Old Forge Museum (Great Tew) (under half a mile north) and Deddington Castle (4.9 miles east). Open spaces near Great Tew include Woodford Bottom and Lamb's Pool.
DIY sealant or a professional job?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Nearby places to Great Tew
More services for Great Tew
Surface by surface
Brick reveals
We rake out the old mastic and pack deep voids before the new mastic goes in.
Timber door frames
Sand mastic is used round timber door frames too. We renew it the same way as on windows.
What we can’t put right
It helps to know what we cannot do:
- Crumbling stone or brickwork round the window
- Timber that has rotted
- Whether work needs listed building consent
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Surfaces we seal
- Timber door frames
- Stone surrounds
- Sash and case windows
- Period & listed homes
- Tenement windows
- Brick reveals
Why act early in Great Tew
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry so renewing it early protects the window. In a small place like Great Tew, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote.
Why Great Tew clients choose us
- Homes, businesses and hotels
- An ARBOMaster approved applicator
- Old sealant always removed completely
- We leave the area clean and tidy
The process
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. Most jobs take anything from a few hours to a full day, depending on how many windows. For a village or hamlet like Great Tew, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- 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.
- 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.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any water getting in
- Tell us about access, such as stairs, a lift or high-level joints
Get a quote
We do not publish a price list, because every job is different. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or send us an email.
Advice
What we’re called out for in Great Tew
Age is the main cause. Sand mastic is a maintenance item like any pointing and how long it lasts depends on the weather it faces.
Any of these means the joints need attention:
- Weathered mastic on the most exposed windows
- Cement or filler used on old window joints that has cracked
- Cracked mastic round a front door frame
- Old sand mastic that has cracked, crumbled or fallen out
If you live in an older home near Church of St Michael and All Angels, 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 insurance they hold
- How long the guarantee is
- Which sealant they’ll use, and why
- How the surfaces are prepared before sealing
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Ask us before painting near the mastic
- Inspect the joints round the windows every year or so
- Make sure water runs off the sill
- Keep modern sealant off the mastic
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Sound mastic protects the frame. Failed mastic lets water reach the timber and timber that stays wet can rot.
Your questions about sand mastic in Great Tew
Is Great Tew within the area you cover?
Yes, Great Tew is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is there a guarantee on sand mastic in Great Tew?
Every job comes with our one-year guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Do you hold any approvals?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Do you offer different sealant colours?
Yes. Sealants come in white, clear, grey and other colours, and we agree the colour with you before any work starts.
Should I try DIY first?
It depends on the job. High-level, external movement and fire-rated joints are professional jobs.
Is it messy?
Tidy work is part of the job. Nearby surfaces are protected, and the area is left clean when we finish.
Is it OK to seal over old sealant?
No. Fresh sealant does not stick to old sealant, and anything trapped underneath, including mould and water, stays there. It all has to come out first.