West Berkshire · England
Sand mastic for sash & case windows in East Ilsley, West Berkshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in East Ilsley and across West Berkshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Modern sealant on a period surround
- Mastic dropping out of the joint
- Gaps between timber frames and stone or brick
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Do not run silicone over sand mastic
- Find out about consent before window work on a listed home
- Look over the window mastic once a year
- Leave the new mastic unpainted
Leave the new mastic alone while it firms up. It skins over quickly but needs longer to fully harden.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
About our sand mastic in East Ilsley
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. We work on timber door frames, stone surrounds and tenement windows, and people most often call us about mastic that needs renewing before redecorating and wind and rain getting in round a sash window.
Homes in small places like East Ilsley often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
Whatever the size of the job, you get the same one-year guarantee.
- Location
- East Ilsley (RG20)
- Wider area
- West Berkshire
- Cover
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
East Ilsley homes and the weather
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you look after a building such as The Ilsleys Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
East Ilsley is about 6 miles south of Didcot, in West Berkshire. Every kind of property in East Ilsley can book us for sand mastic, old or new, large or small. The work is guaranteed for a year. Our West Berkshire coverage runs to 155 places, and East Ilsley is one of them. Our Reading page covers work nearby.
All of RG20 is within our area for sand mastic, from the main roads to the quietest streets. You will find streets such as High Street, Farriers Lane and Abingdon Road, and we cover them all. Neighbouring places we cover for sand mastic include Compton (2 miles south-east), Chilton (3 miles north), Woodway (3 miles north-east), Upton (4 miles north) and Blewbury (4 miles north-east). Further out, we also cover Newbury (9 miles south), Thatcham (9 miles south), Burghfield Common (13 miles south-east), Speenhamland (8 miles south), Hungerford (13 miles south-west) and Calcot (12 miles south-east).
Local landmarks in East Ilsley
In East Ilsley, that means homes and buildings near The Downs School and The Star pub, among other places. Nearby you will also find Atlas Computer Laboratory (3.5 miles north) and Hampstead Norris Castle (3.9 miles south-east). Green spaces nearby include Churn Hill.
Why deal with it now?
Cement-based fillers and modern sealants don’t always suit a period surround. Sand mastic matches what was there and that can be important for listed homes. Around East Ilsley, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why choose Mr Mastic in East Ilsley
- We leave the area clean and tidy
- Fully insured
- A 12-month guarantee on all work
- Sanitary silicone with an anti-fungal additive in wet areas
See our cost guide and our reviews.
The process
You don’t need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the work takes a few hours per window, depending on the condition of the joints in most cases. In a small place like East Ilsley, 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.
- 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.
- We dress the surface so it sits neatly against the masonry.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Move anything stored near the joints
- Tell us about any water getting in
How to get a quote
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job.
Read more
What else we do in East Ilsley
Work for landlords, hotels and businesses
For anyone letting property in or around East Ilsley, several properties can go on one quote. Send us the addresses and the work at each.
In hotels, rooms out of use cost money, so we plan the work room by room. We have worked in hotels as well as homes and businesses.
Quotes for sand mastic in East Ilsley
Every job gets its own quote. This is what makes a difference:
- Whether there’s mould to deal with
- Any working-time requirements on site
- Which sealant suits the joint
- How much there is to do
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please call 0345 464 0079 or email us.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- The rough size of the job
- A few pictures by email, if you can
- What’s wrong with the joints now
- If it’s domestic, commercial or a hotel
Need a quote? Please ring 0345 464 0079 or send us an email with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Your questions about sand mastic in East Ilsley
Do you cover East Ilsley for sand mastic?
Yes. Our work covers London and the South East, and East Ilsley is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job.
Is there a guarantee on sand mastic in East Ilsley?
Every job comes with our one-year guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Are you insured?
Yes, we’re fully insured.
When will the new mastic be hard?
It forms a skin fairly soon, then hardens over a longer period. The weather and joint depth both affect it.
Will there be a smell?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
Is it messy?
Tidy work is part of the job. We protect what’s around the joints, and we clear up when we’re done.
Do you offer different sealant colours?
Most of the time, yes. We’ll explain which colours are available.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we’ll advise.
When something else is needed
Some problems need a builder, plumber or other trade rather than us:
- Decisions on consent for listed homes
- Broken panes
- Crumbling stone or brickwork round the window
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Joints and surfaces we work on
- Tenement windows
- Brick reveals
- Timber door frames
- Period & listed homes
- Stone surrounds
- Sash and case windows