East Sussex · England
Sand mastic for sash & case windows in Jarvis Brook, East Sussex
Our applicators work in Jarvis Brook on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a one-year guarantee.
- Open joints round the window box
- Tired mastic found when preparing windows for paint
- A silicone bead on a sash window that spoils the look
Sand mastic in Jarvis Brook
Sand mastic suits most period window surrounds. On modern frames we’d normally use a flexible sealant and we will explain which is best for yours. If you’re dealing with weathered mastic on the most exposed windows and old cement repairs round a window that have failed, we can put it right, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Jarvis Brook is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
All of our work is guaranteed for twelve months.
- Where
- Jarvis Brook (TN6)
- Wider area
- East Sussex
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What we can’t put right
Some problems need a builder, plumber or other trade rather than us:
- Sashes that need overhauling
- Decisions on consent for listed homes
- Crumbling stone or brickwork round the window
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly before you book.
What we seal
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Brick reveals
- Timber door frames
- Tenement windows
Jarvis Brook questions
I let a flat near Crowborough station. Can you help?
Yes, rental work is part of what we do. You can call 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before we start.
Is Jarvis Brook in your area for sand mastic?
Yes. We work across London and the South East, and Jarvis Brook is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
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.
Can you quote for more than one area?
Yes. Just list everything you need and we’ll quote it together.
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. On modern frames, we’d normally use a flexible sealant.
Can you match the sealant colour?
We help you choose a colour that suits, from white and clear to greys and other shades. The product needed can limit the range.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Looking after it afterwards
So the new joints stay in good condition:
- Avoid heavy scraping on the mastic joint
- Keep sills and gutters clear so water drains away
- Check with your local planning authority if your home is listed
- Don’t run silicone over sand mastic
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
Jarvis Brook homes and the weather
London and the South East are among the drier parts 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 Groombridge Place (about 4.7 miles north) nearby, there’s older building stock in the area around Jarvis Brook 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’s traditional sand mastic.
For an older house near a landmark such as St Michael & All Angels, the joint between an old wall and a newer frame is generally the first place rain gets in. Schools such as Jarvis Brook Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. Rented homes near Crowborough station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Jarvis Brook is about 1 mile east of Crowborough, in East Sussex. If you need sand mastic in Jarvis Brook, please call 0345 464 0079 or drop us an email for a quick quote. We are based in Crawley and cover East Sussex. We cover 289 towns and villages across East Sussex, large and small. You can also see our page for Crawley, about 17 miles away.
All of TN6 is within our area for sand mastic, from the main roads to the quietest streets. That includes homes and businesses on Western Road, Tubwell Lane and Osborne Road. Nearby, we also carry out sand mastic in Crowborough (1 mile west), Steel Cross (1 mile north), Boarshead (1 mile north), Sweethaws (2 miles south-west) and Marden's Hill (3 miles north-west). Further out, we also cover Lewes (14 miles south-west), Hailsham (13 miles south), Uckfield (7 miles south-west), South Malling (14 miles south-west), Heathfield (6 miles south-east) and Southover (15 miles south-west).
Local landmarks in Jarvis Brook
Typical jobs here are in homes near Beacon Academy. There’s a railway station in Jarvis Brook itself: Crowborough station. Nearby you will also find Crowborough War Memorial Hospital (1.3 miles west). The countryside around Jarvis Brook includes Crowborough Country Park.
Also near Jarvis Brook
More services for Jarvis Brook
Different surfaces, different methods
Period and listed homes
Period homes look their best with traditional materials, and sand mastic is one of them.
Sash and case windows
A sash window’s box frame sits in the masonry opening. The gap round it is pointed with sand mastic.
How the visit works
You do not need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the job takes a few hours per window, depending on the condition of the joints for a typical job. Somewhere as small as Jarvis Brook, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Mention any parking rules near the property
- Clear items away from the joints we’re working on
How to get 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, phone 0345 464 0079 or email us.
Advice
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Work for landlords, hotels and businesses
For anyone letting property in or around Jarvis Brook, several properties can be quoted together. Just tell us the addresses and what each one needs.
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
Why it’s worth doing now in Jarvis Brook
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. Where a wall is exposed, as many are in small places like Jarvis Brook, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll explain what it covers.
Why choose Mr Mastic in Jarvis Brook
- Trusted Arbo and Everbuild sealants
- Approved under the ARBOMaster scheme
- Every job guaranteed for a year
- We leave the area clean and tidy
Take a look at what affects the cost or our reviews.