East Sussex · England
Window & door mastic in High Cross, East Sussex
Window mastic for High Cross, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- White mastic on grey or black frames
- Damp patches on the reveal after heavy rain
- Old mastic that has gone black or come away
What happens on the day
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. Most jobs take a morning for a couple of windows and a door. Somewhere as small as High Cross, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Keep pets and children clear of the area while we work
- Let us know about parking restrictions
Getting a quote
For window mastic in High Cross, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
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Window mastic for homes and businesses in High Cross
A cold draught around a closed window often comes from the frame edge. Resealing that joint can make a room feel noticeably less draughty. Where the air is getting in through the window itself, we’ll say so. We’re often asked to deal with cracked or shrunken mastic around the frame and leaking joints at the ends of sills, across composite doors, patio & French doors and uPVC windows.
In a village or hamlet like High Cross, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
Whatever the size of the job, it’s backed by our one-year guarantee in High Cross and across East Sussex.
- Location
- High Cross (TN6)
- Wider area
- East Sussex
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Surface by surface
Composite doors
Front doors take the weather head on. We pay most attention there.
Window sills
Where a sill meets brick or render, the ends often crack first. A tight seal at each end keeps rain out of the wall.
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Common questions in High Cross
Is High Cross in your area for window mastic?
Yes, High Cross is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or email us with a few details of the job.
Do you cover smaller places like High Cross?
Yes. High Cross is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you have sealant for grey or black windows?
Yes, in most cases. Mention the frame colour when you ask for a quote and we will use the nearest match.
How long does it take to reseal the windows on a house?
Allow a morning for a couple of windows and a door. Access and how stubborn the old mastic is affect the time most.
How do I get a quote for window mastic in High Cross?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before we start.
What should I tell you?
Tell us what needs doing and where. We’ll ask anything else we need to know.
Can you seal over the old sealant?
No, it will not last. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
Landlord and commercial work in High Cross
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Landlords and letting agents in High Cross can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
Towns and villages near High Cross
More services for High Cross
Windows and doors in High Cross
Historic houses like Wadhurst Castle (about 4.9 miles east) are a reminder that the area around High Cross has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Rotherfield Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. In the older streets around The Parish Church of St Denys, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
High Cross is about 3 miles east of Crowborough, in East Sussex. Every kind of property in High Cross can book us for window mastic. Every job comes with our one-year guarantee. High Cross is one of 289 places in East Sussex where we work. Crawley is on our list too, around 19 miles away.
We cover every part of TN6 for window mastic and the streets around it. Being close to the B2101, High Cross is easy for our applicators to reach. We also cover the places around High Cross: 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).
Near you in High Cross
Typical jobs here are in homes near The King's Arms Public House, among other places. The closest station to High Cross is Crowborough station, roughly 1.8 miles west of the centre. Other landmarks nearby include Crowborough War Memorial Hospital (3.1 miles west). Green spaces nearby include Crowborough Country Park.
Signs you need window mastic in High Cross
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
Common reasons people contact us are:
- Gaps left after new windows were fitted
- Gaps between the frame and the inside reveal
- Cracked or shrunken mastic around the frame
- Cracked sealant at the sill ends
If you let a flat or house near Crowborough station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Questions to ask before booking
- Whether they seal over old material or remove it
- What preparation is included
- How the colour is chosen
- How long the guarantee is
What affects the cost of window mastic
For a quick quote, just ask. The main things that affect it are:
- Working hours on commercial sites
- Mould in or behind the old joints
- Access and height
- The size of the job
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote and we will talk you through it.
Helping us quote
To make quoting easier, please include:
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- Any access issues, like height or stairs
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
Why act early in High Cross
Running fresh sealant over the old joint is tempting, but new sealant cannot bond to old, crumbling mastic. It peels before long, and water still gets in behind. Proper resealing starts with removing the old joint. Around High Cross, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What you pay reflects the work, not guesswork. That’s why we ask about the job first.
What you get with us
- Any old sealant cut out fully, not covered over
- Homes, businesses and hotels
- Arbo and Everbuild products
- A choice of colours where the product allows
Take a look at what affects the cost and what customers say.