Hampshire · England
Sand mastic for sash & case windows in Greywell, Hampshire
Problem with your window and door surrounds in Greywell? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Old sand mastic that has cracked, crumbled or fallen out
- A silicone bead on a sash window that spoils the look
- Window mastic to renew ahead of painting
Sand mastic in Greywell, done properly
We work across Greywell renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. We work on period & listed homes, tenement windows and timber door frames, and the jobs we see most are mastic dropping out of the joint and old cement repairs round a window that have failed.
Somewhere as small as Greywell, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
We stand behind the work with a one-year guarantee, so you are covered after we’ve gone.
- Where
- Greywell (RG29)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What we can’t put right
We’ll always be straight with you, so here’s what new sealant will not do:
- Masonry that needs repairing
- Decayed frames that need repair
- Decisions on consent for listed homes
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
What we seal
- Timber door frames
- Sash and case windows
- Tenement windows
- Stone surrounds
- Brick reveals
- Period & listed homes
Questions from Greywell
I let a flat near Hook station. Can you help?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before we start.
Is Greywell in your area for sand mastic?
Yes, Greywell is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing, and we will send you a clear quote.
How long will you be here?
That depends on how much there is to do, but as a guide it takes a few hours per window, depending on the condition of the joints. We’ll tell you when we quote.
Do you guarantee sand mastic work?
Our 12-month guarantee covers every job, sand mastic included.
What is sand mastic?
Sand plus a binder based on linseed oil. It’s built up in the joint by hand and shaped to suit the surround.
Are you insured?
Yes, we’re fully insured for every job we do.
What should I tell you?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply phone 0345 464 0079 or drop us an email.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
Why it’s worth doing now in Greywell
Draughts round a sash window are not always the sashes. Open mastic joints round the box can let air in and new mastic seals them. In a small place like Greywell, 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 normally makes better use of the time than several visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
What you get with us
- Old sealant always removed completely
- 180+ five-star Google reviews
- Sanitary silicone with an anti-fungal additive in wet areas
- Every job guaranteed for a year
Take a look at what affects the cost or our reviews.
Landlord and commercial work in Greywell
If you manage several properties in or around Greywell, jobs at different addresses can go on one quote. Send us the addresses and the work at each.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and getting the depth right matters as much as the look.
Common problems we fix in Greywell
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint.
The problems people usually mention when they call are:
- Patchy fillers round a sash window
- Failed mastic on an exposed elevation
- Crumbling sand mastic round a window
- Tired mastic found when preparing windows for paint
For landlords with property near Hook station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
What your quote should include
- Whether you can choose the colour
- Whether VAT is included
- Are they insured?
- Who does the work, and how experienced they are
What the job involves on each surface
Brick reveals
Loose mastic comes out and deep gaps are packed before the new mastic goes in.
Timber door frames
Round a period front door, sand mastic gives the right look.
What we do, step by step
We bring everything the job needs with us. Once we’ve agreed what’s being done, the area is protected and the work begins. It normally takes a few hours for a single window, longer for several. Somewhere as small as Greywell, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- We dress the surface so it sits neatly against the masonry.
Preparing for the visit
- Let us know about parking restrictions
- Let us know if you’ve seen damp or leaks
- Clear the area around the work
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, call 0345 464 0079 or drop us an email.
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Also near Greywell
Other services in Greywell
Windows and doors in Greywell
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Robert May's School? Then its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near Church of St Mary the Virgin, the joint between an old wall and a newer frame is generally the first place rain gets in.
Greywell is about 6 miles east of Basingstoke, in Hampshire. Across the RG29 area, our applicators can take on sand mastic. 683 places in Hampshire are on our list, large and small. Our Reading page covers work nearby, about 13 miles away.
Work in RG29 is quoted and booked the same way as anywhere else. Local streets include The Street, Hook Road and Dorchester Way, and we cover them all. We also cover the places around Greywell: Warnborough Green (1 mile north-east), North Warnborough (1 mile east), Up Nately (1 mile north-west), Nately Scures (1 mile north-west) and Hook Common (1 mile north). Within a short drive, we also cover Basingstoke (6 miles west), Farnborough (9 miles east), Fleet (6 miles east), Aldershot (9 miles east), Alton (8 miles south) and Yateley (8 miles north-east).
Around Greywell
In Greywell, that means homes and buildings near Fox And Goose Public House, among other places. The closest station to Greywell is Hook station, roughly 1.4 miles north. A little further out are West Green House Agricultural Museum (3.4 miles north-east) and Odiham Castle (within half a mile north-east). For a walk, there’s Tundry Hill and The Mill Field.