East Sussex · England
Lions Green Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Lions Green, with a one-year guarantee on every job. Ask us for a quote.
- Window mastic to renew ahead of painting
- A silicone bead on a sash window that spoils the look
- Gaps round a timber door in stone or brick
About our sand mastic in Lions Green
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. We’re often asked to deal with patchy fillers round a sash window and mastic that needs renewing before redecorating, on stone surrounds, timber door frames and tenement windows.
Mastic can only go onto a dry, clean joint, so window work in Lions Green is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Each job carries a 12-month guarantee.
- Where
- Lions Green (TN21)
- Wider area
- East Sussex
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Your questions about sand mastic in Lions Green
Is Lions Green within the area you cover?
Yes, Lions Green is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is sand mastic in Lions Green guaranteed?
All our work, in Lions Green and everywhere else, comes with a 12-month guarantee. We’re also fully insured and ARBOMaster approved.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Where are you based?
We work from Crawley. Our applicators cover Lions Green, along with the rest of our area.
Should I use sand mastic or silicone?
It depends on the window. Period windows in stone or brick usually suit sand mastic and newer frames generally get a flexible sealant.
What is sand mastic?
A traditional pointing material made from sand and a linseed-oil-based binder, used between timber frames and stone or brick.
Can old silicone round a sash window be swapped for sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic beds in well.
Do you offer different sealant colours?
In most cases you can choose. We will explain which colours are available and agree one before work begins.
Quotes for sand mastic in Lions Green
We don’t publish a price list, because no two jobs are the same. What we look at:
- How many areas need sealing
- How easy the joints are to reach
- The product the joint needs
- When we can work, for business premises
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Helping us quote
When you contact us, these details help:
- A few pictures by email, if you can
- Roughly how big the job is
- The address or postcode of the job
- Any previous sealing or DIY work
To get a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. We’ll send you a clear quote before any work starts.
Surface by surface
Sash and case windows
A sash window’s box frame sits in the masonry opening. The gap round it is pointed with sand mastic.
Brick reveals
An open joint at a brick reveal lets weather in. New mastic seals the gap.
Landlord and commercial work in Lions Green
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
From a single let to a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Also near Lions Green
Other services in Lions Green
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Take care around the mastic when scraping paint
- Plan mastic work ahead of painting
- Check with your local planning authority if your home is listed
- Clear gutters so water doesn’t pour onto the windows
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.
Do you need sand mastic in Lions Green?
Some old mastic was never deep enough. A thin layer doesn’t hold well, which is why we pack deep voids first and get the depth right.
These are the problems we’re asked about most:
- Modern sealant on a period surround
- Weathered mastic on the most exposed windows
- Tired mastic found when preparing windows for paint
- Gaps where the frame meets the masonry
Around Lions Green, as everywhere, sand mastic is only as good as the preparation behind it.
What your quote should include
- What the quote includes, VAT included or not
- Whether they’re fully insured
- Whether all the old sealant comes out first
- Who turns up on the day
What we do, step by step
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours per window, depending on the condition of the joints. Somewhere like Lions Green needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we look at the surrounds with you and agree what needs doing.
- Old, loose mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
Getting ready for the visit
- Keep children and pets away from the work area
- Let us know about parking restrictions
- Mention any sign-in or site rules at work premises
Get a quote
Want a quote for sand mastic? Please ring 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
Lions Green homes and the weather
With historic houses such as Horselunges Manor (about 4 miles south) nearby, there’s older building stock in the area around Lions Green as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near The Parish Church of All Saints, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Lions Green is about 5 miles east of Uckfield, in East Sussex. For sand mastic in and around Lions Green, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover East Sussex from our Crawley base, Lions Green included. Our area takes in 289 places across East Sussex, from the larger towns to small villages. Brighton is on our list too, around 17 miles away.
Every address in TN21 is within our area for sand mastic. If you’re just outside Lions Green, we cover Waldron (1 mile north-west), Burlow (1 mile south-east), Horam (1 mile south-east), Maynard's Green (2 miles east) and Roser's Cross (2 miles north). Within a short drive, we also cover Eastbourne (11 miles south), Bexhill-on-Sea (13 miles south-east), Seaford (12 miles south), Lewes (10 miles south-west), Hailsham (6 miles south) and Crowborough (8 miles north).
Around Lions Green
We work in homes and buildings around The Star Inn. Nearby you’ll also find Tickerage Castle (3.6 miles north-west) and Sussex Farm Museum (1.2 miles east). Not far away are Selwyns Wood.
When it isn’t the sealant
It helps to know what we can’t do too:
- Damaged stone surrounds
- Sashes that rattle, stick or will not open
- Broken panes
If in doubt, phone 0345 464 0079 or email us and we will say what we think before booking.
What we seal
- Sash and case windows
- Period & listed homes
- Stone surrounds
- Brick reveals
- Timber door frames
- Tenement windows