East Sussex · England
New-build mastic & snagging in High Cross, East Sussex
Plot mastic for developers and snagging failed sealant in new homes for homeowners, landlords and businesses in High Cross. Fully insured, ARBOMaster approved and guaranteed for a year.
- Messy sealant that spoils new finishes
- Sealant that never bonded to the surface
- Internal frame sealant that has split
How we handle new build mastic in High Cross
Some owners wait for the first year’s movement before having joints redone. For small cosmetic gaps, that’s reasonable, but a failed shower or bath seal shouldn’t wait. We work on skirting & floors, kitchens and plot handovers, and common reasons people get in touch are sealant work across a run of new homes and untidy sealant flagged on a snagging list.
Around High Cross, older homes often have timber floors that move through the year, so skirting and threshold joints need a flexible sealant rather than a rigid filler.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or email us.
- Where
- High Cross (TN6)
- Wider area
- East Sussex
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
Landlords and agents in High Cross can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
New build mastic around High Cross
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.
Around High Cross, as everywhere, new build mastic is only as good as the preparation behind it.
High Cross is about 3 miles east of Crowborough, in East Sussex. Jobs in High Cross get the same care as everywhere else we work: old sealant removed completely, careful preparation and a one-year guarantee. High Cross is one of 289 places in East Sussex we cover for new build mastic. Crawley is on our list too, about 19 miles from High Cross.
Our applicators cover all of TN6 for new build mastic. You’ll find High Cross on the B2101, which makes it straightforward to reach with everything needed for new build mastic. If you’re just outside High Cross, we cover Argos Hill (1 mile east), Rotherfield (1 mile north-west), Town Row (1 mile north), Woolbridge (1 mile south) and Wellbrook (2 miles south-east). Larger places within reach include Lewes (15 miles south-west), Hailsham (12 miles south), Crowborough (3 miles west), Uckfield (7 miles south-west), Polegate (15 miles south) and South Malling (14 miles south-west).
Local landmarks in High Cross
We work in homes and buildings around The King's Arms Public House and the streets around them. For rail, the closest station is Crowborough station, about 1.8 miles west of the centre. Well-known places in the area include Crowborough War Memorial Hospital (3.1 miles west). For a walk, there’s Crowborough Country Park.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Different surfaces, different methods
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. Resealing properly keeps water where it belongs.
Show homes
Show homes need sealant that looks right from day one. Every bead is neat and coloured to suit the room.
FAQs for High Cross
Is High Cross within the area you cover?
Yes, High Cross is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you work for landlords with property near Crowborough station?
Yes. We work for landlords and agents as well as homeowners. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
How long will you be here?
A typical job takes anything from a few hours to several days, depending on the number of plots. We’ll confirm how long when we quote.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
When is the sealant fully cured?
That depends on the sealant used, so please follow the time we give you when we finish.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
Is it worth resealing while the house is still settling?
For failed seals that let water through, the best time is now. For small cosmetic gaps, waiting until the house has settled can save doing them twice.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
What happens on the day
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a few hours in a single home, depending on how much there is to do. In a small place like High Cross, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we work through your snagging list or plot schedule with you.
- We cut out every bit of the failed or messy sealant.
- Each joint is cleaned of dust and grit, then primed if required.
- We apply a sealant that suits each joint and tool it to a neat finish.
- Each area is checked and left with its cure time.
Before we arrive
- Move anything stored near the joints
- Let us know about parking restrictions
- Plan for the work area to be out of bounds to pets and children
Get a quote
We do not publish a price list. Instead, we give you a clear price for your job. To arrange one, phone 0345 464 0079 or email us.
Read more
Aftercare tips
So the new joints stay in good condition:
- Wait for the cure time before using a resealed shower
- Get a leaking seal dealt with right away
- Look at the sealant regularly in the first couple of years
- Put sealant faults on your snagging list early
Photograph failed sealant before it’s redone and keep the builder’s replies. It’s useful if you need to raise other issues later.
Mould takes hold quickly in sealant that has gaps or lifted edges. Resealing before mould gets in keeps the job straightforward.
What we are called out for in High Cross
If plaster or screed was still damp when it was sealed, the bond suffers. On a busy site, joints are not always given time to dry first.
The most common problems we see are:
- Frame joints opening as the plaster dries
- Shower seals failing in the first year or two
- Untidy sealant flagged on a snagging list
- Sealant applied over dusty or wet surfaces
For new homes near Crowborough station, it’s worth checking the sealant early, while snags are still fresh.
What your quote should include
- Who turns up on the day
- When the joint can take water or movement
- Are they insured?
- What happens if they find a problem under the old sealant
When something else is needed
In fairness, some problems need a different trade:
- Disputes or warranty claims with your builder
- Settlement cracks that need a surveyor
- Cracked trays, tiles or worktops
If you are not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before booking.
Joints and surfaces we work on
- Kitchens
- Windows & doors
- Show homes
- Bathrooms & en suites
- Skirting & floors
- Plot handovers