West Berkshire · England
Sand mastic for sash & case windows in Stockcross, West Berkshire
Problem with your window and door surrounds in Stockcross? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Wind and rain getting in round a sash window
- Gaps between timber frames and stone or brick
- Cement or filler used on old window joints that has cracked
What sand mastic looks like in Stockcross
Historic houses like Benham Park (about 0.6 miles south-east) are a reminder that the area around Stockcross has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you let a flat or house near Newbury station, any sash windows need sound mastic to keep draughts and rain out. For an older house near a landmark such as Church of St John, the joint between an old wall and a newer frame is normally the first place rain gets in.
Stockcross is about 3 miles north-west of Newbury, in West Berkshire. Homes, rented property, offices and hotels in Stockcross can book us for sand mastic. The work is guaranteed for a year. Our West Berkshire coverage runs to 155 places, Stockcross among them. For nearby work, see our Reading page.
Our applicators cover all of RG20 for sand mastic. That includes homes and businesses on Ermin Street, Chapel Road and Glebe Lane and the roads around them. Neighbouring places we cover for sand mastic include Marsh Benham (1 mile south-west), Wickham Heath (1 mile north-west), Bagnor (1 mile east), Speen (1 mile south-east) and Boxford (2 miles north). Within a short drive, we also cover Newbury (3 miles south-east), Thatcham (5 miles east), Burghfield Common (14 miles east), Hungerford (6 miles west), Calcot (14 miles east) and Lambourn (9 miles north-west).
Landmarks near Stockcross
We work in homes and buildings around Trinity School, The Rising Sun pub and Hamstead Marshall Park, among other places. The nearest railway station is Newbury station, roughly 2.6 miles south-east. Nearby you will also find British Balloon Museum & Library Ltd (2.5 miles east) and West Berkshire Community Hospital (3.7 miles east). Open spaces near Stockcross include Rack Marsh.
Sand mastic in Stockcross, done properly
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s made from sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. We’re often asked to deal with cracked mastic round a front door frame and silicone on a period window that looks wrong, on tenement windows, brick reveals and timber door frames.
Around Stockcross, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Stockcross (RG20)
- Wider area
- West Berkshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Inspect the joints round the windows every year or so
- Sort the mastic before the decorators arrive
- Keep modern sealant off the mastic
- Ask a joiner to look at soft timber first
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Sound mastic protects the frame. Failed mastic lets water reach the timber, which can lead to rot.
Stockcross questions
Is Stockcross in your area for sand mastic?
Yes. Our work covers London and the South East, and Stockcross is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Do you work for landlords with property near Newbury station?
Yes, we work for letting agents and landlords. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Can new sealant go over the old?
No, it won’t last. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
Do you offer different sealant colours?
Most of the time, yes. We will tell you which colours the right product comes in.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us.
Do I have to be there?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is normally more efficient, so mention them when you ask for a quote.
Will it make a mess?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
What happens if it’s left?
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. In a small place like Stockcross, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Why Stockcross clients choose us
- More than 20 years in sealant work
- Neat joints and a tidy finish
- Anti-fungal sanitary silicone in wet areas
- We’re fully insured
Read what affects the cost or what customers say.
What affects the cost of sand mastic
For a quick quote, just ask. What matters most is:
- How much old sealant there is and how hard it is to remove
- The number of rooms or windows
- When we can work, for business premises
- Whether the work is at height
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first and give you a clear quote before work begins.
What we need to know
When you contact us, these details help:
- Where the job is, and your postcode
- Access, such as stairs, a lift or height
- A few photos by email, if you can
- What the problem is, such as mould, gaps, leaks or cracking
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you’re ready, ring 0345 464 0079 or drop us an email.
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Do you need sand mastic in Stockcross?
Scraping and sanding before painting can loosen old mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
The most common problems we see are:
- Old cement repairs round a window that have failed
- Failed mastic on an exposed elevation
- Gaps between timber frames and stone or brick
- Crumbling sand mastic round a window
Schools such as Stockcross C.E. School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Comparing quotes
- How hidden problems are handled
- Who does the work, and how experienced they are
- Which colour the sealant will be
- How the joint is cleaned and prepared
How the visit works
Most of a good job is in the preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a single window, longer for several. Somewhere as small as Stockcross, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Before we arrive
- Try not to wet indoor joints just before the visit
- Let us know about parking restrictions
- Tell us about any previous sealing or DIY attempts
Ask for a quote
Every job is quoted individually, so start by telling us what you need. Simply call 0345 464 0079 or send us an email and describe the job, and photos are welcome.
Related advice
Also near Stockcross
More services for Stockcross
Surface by surface
Brick reveals
An open joint at a brick reveal lets weather in. Renewing the mastic closes it.
Stone surrounds
Stone openings are rarely perfectly straight, so the gap is not the same all the way round. We shape it by hand to follow the stone.