East Sussex · England
Flimwell Sand Mastic
Sand mastic in Flimwell from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Gaps where the frame meets the masonry
- Patchy fillers round a sash window
- Silicone on a period window that looks wrong
Different surfaces, different methods
Stone surrounds
Old stone surrounds are often uneven, so the gap is not the same all the way round. Sand mastic is shaped by hand to suit.
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
Sand mastic for homes and businesses in Flimwell
Traditional burnt sand mastic that sits naturally against stone and brick. It’s a good fit for period properties where a modern sealant bead would stand out. If you have old cement repairs round a window that have failed and tired mastic found when preparing windows for paint, we can help, on brick reveals, tenement windows and period & listed homes alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Flimwell is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
The work is covered for a year after we finish. If there’s a problem with it, please call 0345 464 0079 or drop us an email.
- Place
- Flimwell (TN5)
- Wider area
- East Sussex
- Cover
- 12 months on all our work
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Flimwell
Other services in Flimwell
For landlords and businesses
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.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What sand mastic looks like in Flimwell
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Scotney Castle (about 3.1 miles north-west) nearby, there’s older building stock in the area around Flimwell as well as newer homes. 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.
If you live in an older home near St Augustine's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Flimwell is about 10 miles south-east of Royal Tunbridge Wells, in East Sussex. Our applicators cover sand mastic for homes and businesses in Flimwell and nearby. Our East Sussex coverage runs to 289 places, Flimwell among them. You can also see our page for Crawley, about 28 miles away.
Our applicators cover all of TN5 for sand mastic. You’ll find streets such as High Street, London Road and Corner Farm Close. Main roads around Flimwell include the B2087, which makes travel easy. We also cover the places around Flimwell: Stonecrouch (2 miles north-west), Ticehurst (2 miles west), Three Leg Cross (2 miles west), Cooper's Corner (2 miles south-east) and Bedgebury Cross (2 miles north). We also work in nearby towns such as Hastings (14 miles south), Bexhill-on-Sea (14 miles south), Hailsham (15 miles south-west), Crowborough (12 miles west), St Leonards (14 miles south) and Hastings Old Town (15 miles south-east).
What’s near Flimwell
The closest station to Flimwell is Etchingham station, about 3 miles south of the centre. Nearby you’ll also find Ticehurst House Hospital (2 miles west) and Finchcocks Musical Museum (3.5 miles north). Green spaces nearby include Bewl Water.
How it works
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it usually takes anything from a few hours to a full day, depending on how many windows. Somewhere as small as Flimwell, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- 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.
Getting ready for the visit
- Mention if the joints have been sealed before
- Mention any leaks or damp you’ve noticed
- Move anything stored near the joints
Getting a quote
Every job is quoted individually. Just ring 0345 464 0079 or drop us an email with the details.
Advice
When to call us in Flimwell
Scraping and sanding before painting can loosen old mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
Keep an eye out for any of the following:
- Weathered mastic on the most exposed windows
- Cement or filler used on old window joints that has cracked
- Gaps where the frame meets the masonry
- Modern sealant on a period surround
For landlords with property near Etchingham station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Questions to ask before you book
- What happens if the job turns out different
- Whether the sealant suits the joint
- What insurance they hold
- How much experience the applicator has
Questions from Flimwell
Do you cover Flimwell for sand mastic?
Yes, Flimwell is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we will give you a clear quote.
Will you come out to Flimwell?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is the work guaranteed?
All our work has a one-year guarantee.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
Are you insured?
Yes. We are fully insured for every job we do.
Where do you work from?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. If you are redecorating the window, ask us first and we’ll advise.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
What happens if it’s left?
Cement-based fillers and modern sealants do not always suit a period surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. Older cottages and farmhouses around Flimwell can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Combining jobs into one visit is generally more efficient than separate visits. We’ll send you a clear quote for the lot.
Why book with us
- Any old sealant cut out fully, not covered over
- Every job guaranteed for a year
- Quality sealants from Arbo and Everbuild
- Approved under the ARBOMaster scheme
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Make sure water runs off the sill
- Ask the planning authority about consent for listed or conservation-area homes
- Don’t run silicone over sand mastic
- Leave the new mastic unpainted
Avoid painting over the new mastic, as traditional guidance advises. If you’re redecorating, ask us first.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.