West Berkshire · England
Great Shefford Sand Mastic
Problem with your window and door surrounds in Great Shefford? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Cement or filler used on old window joints that has cracked
- Silicone on a period window that looks wrong
- Open joints round the window box
Great Shefford 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.
If you live in an older home near Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Great Shefford is about 8 miles north-west of Newbury, in West Berkshire. Jobs in Great Shefford get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. 155 places in West Berkshire are on our list, large and small. Reading is on our list too, about 20 miles from Great Shefford.
All of RG17 is within our area for sand mastic. You will find streets such as Station Road, The Mead and Miller's Field, and we cover them all. Close by, we work in East Shefford (1 mile south-east), Weston (1 mile south-east), East Garston (2 miles north-west), Shefford Woodlands (2 miles south-west) and East Garston Woodlands (2 miles west). We also work in nearby towns such as Newbury (8 miles south-east), Thatcham (10 miles south-east), Speenhamland (7 miles south-east), Hungerford (5 miles south-west), Lambourn (4 miles north-west) and Shaw (7 miles south-east).
What’s near Great Shefford
Green spaces nearby include Sole Common Pond.
Sand mastic in Great Shefford, done properly
Old sand mastic cracks, crumbles and falls out over time, leaving gaps round the window. We rake it out and renew it and tidies the surround. Typical jobs include patchy fillers round a sash window and mastic that needs renewing before redecorating, on sash and case windows, period & listed homes and tenement windows.
Mastic can only go onto a dry, clean joint, so window work in Great Shefford is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Big or small, it’s backed by our one-year guarantee in Great Shefford and across West Berkshire.
- Location
- Great Shefford (RG17)
- Wider area
- West Berkshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Why act early in Great Shefford
Before painting the windows, it pays to renew the mastic. Painting over failed mastic doesn’t seal it and traditional guidance is to leave the new mastic unpainted. Around Great Shefford, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Why us?
- 180+ five-star Google reviews
- Every job guaranteed for a year
- Homes, businesses and hotels
- Tidy, careful work
Take a look at our cost guide or our reviews.
What affects the cost of sand mastic
Jobs vary more than people expect. The main factors:
- How much there is to do
- Whether old sealant or filler has to be cut out
- Any working-time requirements on site
- How many areas need sealing
What you pay reflects the work, not guesswork. That is why we ask a few questions first and give you a clear price before any work starts.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- A few photos by email, if you can
- Any access issues, like height or stairs
- Whether it’s a home or a business
- The problem you’ve noticed
There’s no standard price list. Instead, we give you a clear price for your job. To get started, call 0345 464 0079 or drop us an email.
Landlord and commercial work in Great Shefford
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
For anyone letting property in or around Great Shefford, several properties can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
How the visit works
Most of a good job is in the preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it generally takes a few hours per window, depending on the condition of the joints. For a village or hamlet like Great Shefford, 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.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Clear items away from the joints we are working on
- Tell us about any previous sealing or DIY attempts
- Keep children and pets away from the work area
How to get 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. When it suits you, ring 0345 464 0079 or drop us an email.
Related advice
Great Shefford questions
Can you do sand mastic in Great Shefford?
Yes. We work across London and the South East, and Great Shefford is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Is Great Shefford within the area you cover?
Yes. Great Shefford is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What is sand mastic?
Sand mastic is a traditional material for pointing round windows and doors. It’s made with sand and a linseed-oil-based binder.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Will there be a smell?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
I’m a tenant. Can you help?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Are you fully insured?
Yes. We’re fully insured, and we have been doing sealant work for more than 20 years.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and we will quote it together.
Do you need sand mastic in Great Shefford?
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
Any of these means the joints need attention:
- Failed mastic on an exposed elevation
- Patchy fillers round a sash window
- Window mastic to renew ahead of painting
- Modern sealant on a period surround
Schools such as Shefford C.E. Primary School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- When the joint can take water or movement
- How hidden problems are handled
- The length of the guarantee
- Whether VAT is included
What the job involves on each surface
Tenement and terrace windows
Where a building is shared, window work may involve neighbours, so check who is responsible first.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
Also near Great Shefford
What else we do in Great Shefford
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.