West Berkshire · England
Sand mastic for sash & case windows in Ashmore Green, West Berkshire
Sand mastic across Ashmore Green and nearby, with old sealant always removed completely and a 12-month guarantee.
- Mastic dropping out of the joint
- Window mastic to renew ahead of painting
- Cracked mastic round a front door frame
DIY sealant or a professional job?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
How we handle sand mastic in Ashmore Green
Across Ashmore Green, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand, finished to suit the masonry. We work on period & listed homes, tenement windows and brick reveals, and the jobs we see most are modern sealant on a period surround and crumbling sand mastic round a window.
Mastic can only go onto a dry, clean joint, so window work in Ashmore Green is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Ashmore Green (RG18)
- Region
- West Berkshire
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Your questions about sand mastic in Ashmore Green
Can you do sand mastic in Ashmore Green?
Yes, Ashmore Green is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or email us with a few details of the job, and we’ll send you a clear quote.
Do you cover smaller places like Ashmore Green?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Should I check with the council before work on a listed or conservation-area home?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like, but they decide.
Do the sealants smell?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
Is it worth trying it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
What should I tell you?
A short description and the location, with pictures by email if possible. We will ask anything else we need to know.
Can new sealant go over the old?
No. The old sealant always comes out first.
Do I need to be at home?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that usually means someone at home.
What we cannot put right
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- Decisions on consent for listed homes
- Damaged stone surrounds
- Broken panes
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
Joints and surfaces we work on
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Timber door frames
- Tenement windows
- Brick reveals
Landlords, agents and businesses in Ashmore Green
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we will quote.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
What we do, step by step
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The job generally takes a few hours for a single window, longer for several from start to finish. Somewhere like Ashmore 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 look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Where the joints are inside, avoid wetting them before we arrive
- Clear the area around the work
Ask for a quote
Getting a quote is simple: let us know the job and the location. A few photos by email make the job easier to understand.
Related advice
Different surfaces, different methods
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we’ll confirm what’s needed.
Timber door frames
Doors face weather and wear and the mastic can crack early. We rake it out and renew it.
What we’re called out for in Ashmore Green
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint.
People generally contact us when they notice something like this:
- Open joints round the window box
- Weathered mastic on the most exposed windows
- Patchy fillers round a sash window
- Cracked mastic round a front door frame
If you live in an older home near St. Mark's Church, the joint between an old wall and a newer frame is normally the first place rain gets in.
Comparing quotes
- Whether you can choose the colour
- Whether they seal over old material or remove it
- What insurance they hold
- What happens if the job turns out different
Frames and glazing around Ashmore Green
Historic houses like Shaw House (about 2 miles west) are a reminder that the area around Ashmore Green has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. 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.
For landlords with property near Newbury Racecourse station, cracked sand mastic around sash windows lets in the draughts tenants complain about. If you look after a building such as Cold Ash St Mark's C.E. School, its window and door frames need their mastic kept sound, just like a home’s.
Ashmore Green is about 2 miles north-west of Thatcham, in West Berkshire. Jobs in Ashmore Green get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 155 towns and villages across West Berkshire, from the larger towns to small villages. There’s also a page for Reading, roughly 13 miles from Ashmore Green.
Our applicators cover all of RG18 for sand mastic. Sand mastic is available to properties on Ash Terrace, Ashmore Green Road and Stoney Lane. If you are just outside Ashmore Green, we cover Cold Ash (1 mile north-east), Stone Copse (1 mile west), Benham Hill (1 mile south-west), Thatcham (2 miles south-east) and Longlane (2 miles north). Larger places within reach include Newbury (3 miles south-west), Burghfield Common (9 miles east), Hungerford (11 miles west), Spencers Wood (13 miles east), Calcot (10 miles east) and Lambourn (12 miles north-west).
Around Ashmore Green
Around Ashmore Green, our work takes us to homes and buildings near Kennet School. For rail, the closest station is Newbury Racecourse station, about 2.2 miles south-west. Well-known places in the area include West Berkshire Community Hospital (1.4 miles south-west) and Donnington Castle (2.8 miles west). The countryside around Ashmore Green includes Nature Discovery Centre.
How we quote for sand mastic
You’ll get a clear quote before any work starts. It’s based on:
- How much old sealant there is and how hard it is to remove
- When we can work, for business premises
- Which sealant suits the joint
- How many areas need sealing
Leaving a failed joint generally makes the job bigger, not smaller. If you are not sure whether it needs doing, ring 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Helping us quote
When you call or email, these details help:
- The address or postcode of the job
- Whether it’s a home or a business
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
To get a quote, ring 0345 464 0079 or send us an email with the location and a short description of the problem. We’ll give you a clear quote before any work starts.