West Berkshire · England
Upper Green Sand Mastic
Sand mastic for Upper Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cracked mastic round a front door frame
- Draughty sash windows at the surround
- Old cement repairs round a window that have failed
Common questions in Upper Green
Can you help a landlord with a rental near Kintbury station?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Do you cover Upper Green for sand mastic?
Yes. Our work covers London and the South East, and Upper Green is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear quote.
Do I need permission for sand mastic on a listed building?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like but the decision is theirs.
Is it possible to take out silicone and use sand mastic instead?
Often, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
Can you seal over the old sealant?
No. Fresh sealant doesn’t stick to old sealant, and it traps any mould or water underneath. We remove it all first.
Do you guarantee sand mastic work?
Our 12-month guarantee covers every job, sand mastic included.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Where are you based?
We’re a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Sand mastic in Upper Green
If your home is listed or in a conservation area, check with your local planning authority whether consent is needed for work to windows. Sand mastic is often favoured as a like-for-like material. Common call-outs are for draughty sash windows at the surround and mastic that needs renewing before redecorating, on tenement windows, sash and case windows and stone surrounds.
In a village or hamlet like Upper Green, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Location
- Upper Green (RG17)
- Wider area
- West Berkshire
- Cover
- 12 months on all our work
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Quotes for sand mastic in Upper Green
Call for a quick quote. The main things that affect it are:
- When we can work, for business premises
- How much old sealant there is and how hard it is to remove
- Whether the work is at height
- Mould in or behind the old joints
A failed joint rarely gets cheaper to fix by waiting, because water and mould keep working on it. If you’re not sure whether it needs doing, ring 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
What to tell us for a quote
What to tell us when you ask for a quote:
- If it’s domestic, commercial or a hotel
- Whether it has been sealed before
- Where the property is
- What the problem is, such as mould, gaps, leaks or cracking
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. When it suits you, phone 0345 464 0079 or email us.
How the visit works
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the work takes anything from a few hours to a full day, depending on how many windows in most cases. Somewhere like Upper Green needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- 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.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Clear items away from the joints we are working on
- Tell us about any previous sealing or DIY attempts
Ask for a quote
Need a quote? Please call 0345 464 0079 or email us with a few details. We’ll explain what we’d do and give you a clear quote before we start.
Advice
How the job changes by surface
Stone surrounds
Stone openings are rarely perfectly straight, so the gap is not the same all the way round. Sand mastic is shaped by hand to suit.
Sash and case windows
On a sash window, the mastic joint shows on the outside so we finish it carefully.
Aftercare tips
So the new joints stay in good condition:
- Go gently near the mastic when preparing windows
- Ask us before painting near the mastic
- Check the mastic when you check the paintwork
- Get any rot dealt with first
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
Why act early in Upper Green
If you are redecorating, renew the mastic first. Painting over failed mastic does not seal it and traditional guidance is to leave the new mastic unpainted. In a small place like Upper Green, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Combining jobs into one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will give you a clear price for the lot.
Why book with us
- Old sealant always removed completely
- Every job guaranteed for a year
- Trusted Arbo and Everbuild sealants
- We’re fully insured
Read what affects the cost and what customers say.
Upper Green homes and the weather
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Stargroves (about 2.9 miles south-east) are a reminder that the area around Upper Green 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.
If you let a flat or house near Kintbury station, any sash windows need sound mastic to keep draughts and rain out. Homes close to Church of St Michael include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Upper Green is about 7 miles west of Newbury, in West Berkshire. Every kind of property in Upper Green can book us for sand mastic, old or new, large or small. The work is guaranteed for a year. We cover 155 towns and villages across West Berkshire, from the larger towns to small villages. For nearby work, see our Reading page (22 miles or so).
Here we cover the RG17 postcode area for sand mastic. Close by, we work in Inkpen (1 mile north), Inkpen Common (1 mile north-east), Hell Corner (1 mile north-east), Lower Green (1 mile north-west) and Kintbury (2 miles north-east). Within a short drive, we also cover Newbury (7 miles east), Thatcham (9 miles east), Speenhamland (7 miles north-east), Hungerford (4 miles north-west), Lambourn (10 miles north) and Shaw (7 miles north-east).
Local landmarks in Upper Green
In Upper Green, that means homes and buildings near Crown and Garter pub and the streets around them. The closest station to Upper Green is Kintbury station, roughly 2.6 miles north-east of the centre. A little further out are Hamstead Marshall 3 (3.8 miles north-east). Not far away are Kintbury Newt Ponds and Inkpen Hill.
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
When to call us in Upper Green
Over the years, sand mastic weathers. It dries out, cracks and loses its grip from the frame or the masonry.
If you can see any of these, it’s time to have the joints looked at:
- Draughty sash windows at the surround
- Open joints round the window box
- Tired mastic found when preparing windows for paint
- Old cement repairs round a window that have failed
For site and facilities teams at buildings such as Inkpen Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- Which sealant they’ll use, and why
- Who turns up on the day
- How hidden problems are handled
- How long the guarantee is