West Berkshire · England
Sand mastic for sash & case windows in Wellhouse, West Berkshire
Window and door surrounds in Wellhouse need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Gaps round a timber door in stone or brick
- Mastic dropping out of the joint
- Cement or filler used on old window joints that has cracked
Surface by surface
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.
Sand mastic in Wellhouse, 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. If you are dealing with silicone on a period window that looks wrong and mastic dropping out of the joint, we can help, whatever the surface.
Homes in small places like Wellhouse 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.
The work is covered for a year after we finish. If anything isn’t right with it, ring 0345 464 0079 or send us an email.
- Place
- Wellhouse (RG18)
- Region
- West Berkshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Common problems we fix in Wellhouse
Shallow joints are a common cause. Mastic that’s too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
Common reasons people contact us are:
- Tired mastic found when preparing windows for paint
- Crumbling sand mastic round a window
- Wind and rain getting in round a sash window
- Mastic worn away on windows facing the weather
Homes close to Church of St Mary include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Questions to ask before you book
- What happens if they find a problem under the old sealant
- Who does the work, and how experienced they are
- What product goes in the joint
- Whether you can choose the colour
Wellhouse questions
Is Wellhouse in your area for sand mastic?
Yes. Our work covers London and the South East, and Wellhouse is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear quote.
Can you help a landlord with a rental near Thatcham station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear price.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we are using.
Should I use sand mastic or silicone?
For period timber windows in stone or brick, sand mastic is often the better fit. Modern frames normally suit a flexible sealant.
How much does sand mastic cost in Wellhouse?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before any work starts.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us and we’re fully insured.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
If you manage several properties in or around Wellhouse, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
How the visit works
Before we leave, we go over the finished joints with you. The work normally takes a few hours per window, depending on the condition of the joints, depending on the size of the job. In a small place like Wellhouse, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Mention any sign-in or site rules at work premises
- Plan for the work area to be out of bounds to pets and children
Getting a quote
We do not publish a price list, because every job is different. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or drop us an email.
Read more
How we quote for sand mastic
The price is agreed before any work begins. It takes into account:
- How much old sealant there is and how hard it is to remove
- Mould in or behind the old joints
- The number and length of the joints
- The number of rooms or windows
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you’re not sure whether it needs doing, call 0345 464 0079 or send us an email for an honest opinion and a quote.
Asking for a quote
To make quoting easier, please include:
- The problem you’ve noticed
- Whether it’s a home or a business
- A few photos by email, if you can
- Any access issues, like height or stairs
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will send you a clear quote before any work starts.
Also in Wellhouse
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Honest limits
A few problems are outside what sealant work can do:
- Sashes that need overhauling
- Decayed frames that need repair
- Putty and glazing repairs
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Where we work in Wellhouse
- Stone surrounds
- Tenement windows
- Sash and case windows
- Brick reveals
- Timber door frames
- Period & listed homes
What sand mastic looks like in Wellhouse
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Shaw House (about 3.7 miles south-west) are a reminder that the area around Wellhouse has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Rented homes near Thatcham station change hands often, and any sash windows need sound mastic to keep draughts and rain out. For site and facilities teams at buildings such as Hermitage Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Wellhouse is about 3 miles north of Thatcham, in West Berkshire. Whether you are in the middle of Wellhouse or further out, sand mastic is available for homes and businesses alike. 155 places in West Berkshire are on our list, from the larger towns to small villages. There’s also a page for Reading, roughly 12 miles from Wellhouse.
We work across RG18 for sand mastic and the streets around it. If you’re just outside Wellhouse, we cover Hermitage (1 mile west), Little Hungerford (1 mile north-west), Oare (1 mile north-west), Longlane (1 mile west) and Cold Ash (2 miles south). We also work in nearby towns such as Newbury (5 miles south-west), Thatcham (3 miles south), Burghfield Common (9 miles south-east), Speenhamland (4 miles south-west), Hungerford (12 miles west) and Spencers Wood (13 miles east).
What’s near Wellhouse
We work in homes and buildings around The White Horse pub, among other places. The nearest railway station is Thatcham station, about 3.9 miles south of the centre. Other landmarks nearby include Hampstead Norris Castle (2.2 miles north) and West Berkshire Community Hospital (3.4 miles south-west). For a walk, there’s Nature Discovery Centre.