Hampshire · England
Sand mastic for sash & case windows in New Copse, Hampshire
Sand mastic for New Copse and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps where the frame meets the masonry
- Failed mastic on an exposed elevation
What affects the quote in New Copse
For a quick quote, just ask. What matters most is:
- Working hours on commercial sites
- How much there is to do
- The old material and how stubborn it is
- How many areas need sealing
Combining jobs into one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
Helping us quote
There’s no need for technical detail. Just tell us:
- If it’s domestic, commercial or a hotel
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
- How we’d reach the joints
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or send us an email.
Sand mastic in New Copse, done properly
Sand mastic does not last for ever, leaving gaps round the window. We rake it out and renew it so the surround looks right again. If you’re dealing with mastic dropping out of the joint and failed mastic on an exposed elevation, we can put it right, whatever the surface.
Homes in small places like New Copse often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
Every job comes with a 12-month guarantee.
- Location
- New Copse (GU34)
- Region
- Hampshire
- Cover
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
A visit follows a simple pattern: we look at the joints together, protect the area around them, do the work and clear up. It normally takes a few hours for a single window, longer for several. In a small place like New Copse, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- 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.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- Tell us about any previous sealing or DIY attempts
- Let us know about parking restrictions
- Keep children and pets away from the work area
Ask for a quote
There’s no standard price list, because every job is different. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or email us.
Advice
Places near New Copse
Other services in New Copse
Your questions about sand mastic in New Copse
Is New Copse in your area for sand mastic?
Yes. We work across London and the South East, and New Copse is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Can you help a landlord with a rental near Alton station?
Yes, we work for letting agents and landlords. You can ring 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before work begins.
Which is right for my windows, sand mastic or modern sealant?
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 New Copse?
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. We agree the price before any work begins.
Can old silicone round a sash window be swapped for sand mastic?
Yes, we do this often. The old silicone has to come out completely so the mastic beds in well.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll tell you what we are using.
What exactly is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It’s made with sand and a linseed-oil-based binder.
Can I do it myself?
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
A careful DIYer can reseal a simple joint, 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.
When to call us in New Copse
Previous repairs in cement or silicone often trap water or crack away. They don’t move with the timber, and they usually need raking out.
Keep an eye out for any of the following:
- Modern sealant on a period surround
- Old cement repairs round a window that have failed
- Gaps round a timber door in stone or brick
- Gaps between timber frames and stone or brick
If you live in an older home near Church of St Andrew, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What your quote should include
- The length of the guarantee
- What happens if the job turns out different
- Who turns up on the day
- Whether VAT is included
Keeping the joints in good condition
Simple care keeps the joints in good condition. We recommend:
- Get any rot dealt with first
- Take care around the mastic when scraping paint
- Plan mastic work ahead of painting
- Ask the planning authority about consent for listed or conservation-area homes
Leave the new mastic unpainted, as traditional guidance advises. Ask us before any decorating around it.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
Sand mastic in New Copse: local notes
With historic houses such as Bentworth Hall (about 0.9 miles north-east) nearby, there’s older building stock in the area around New Copse as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Medstead Church of England Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. If you let a flat or house near Alton station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
New Copse is about 4 miles west of Alton, in Hampshire. Across the GU34 area, we can carry out sand mastic at your property. 683 places in Hampshire are on our list, large and small. We also work in Southampton, about 21 miles from New Copse.
Work in GU34 works the same way as everywhere else we cover. Other places close to New Copse include South Town (1 mile south), Holt End (1 mile north), Hattingley (1 mile south-west), Wivelrod (1 mile east) and Bentworth (1 mile north-east). We also work in nearby towns such as Basingstoke (9 miles north), Winchester (12 miles south-west), Fleet (14 miles north-east), Aldershot (15 miles north-east), Alton (4 miles east) and Petersfield (11 miles south-east).
Landmarks near New Copse
For rail, the closest station is Alton station, about 4.3 miles east. A little further out are Alton Community Hospital (3.2 miles east) and Gliding Heritage Centre (3.7 miles north-east). For a walk, there’s King's Hill.
Landlord and commercial work in New Copse
Letting agents and landlords in New Copse can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Hotels need rooms back in use, so we plan the work room by room. We’ve worked in hotels as well as homes and businesses.
What sealant work cannot fix
We’d rather tell you now than do work that won’t last, so these are the limits:
- Whether work needs listed building consent
- Timber that has rotted
- Broken panes
If in doubt, call 0345 464 0079 or email us and we’ll say what we think.
Where we work in New Copse
- Timber door frames
- Stone surrounds
- Brick reveals
- Tenement windows
- Period & listed homes
- Sash and case windows