West Sussex · England
Window & door mastic in Highbrook, West Sussex
Window mastic for Highbrook and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Damp patches on the reveal after heavy rain
- A bead that doesn’t match the frame
- Gaps where the sill meets the wall
Common problems we fix in Highbrook
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
Common reasons people contact us are:
- Gaps left after new windows were fitted
- A bead that does not match the frame
- Gaps between the frame and the inside reveal
- Leaking joints at the ends of sills
If you live in an older home near All Saints Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- Whether all the old sealant comes out first
- What insurance they hold
- Which sealant they’ll use, and why
- What happens if they find a problem under the old sealant
Window mastic in Highbrook
The new joint does not have to be white. White, brown, anthracite grey, black and clear sealants are all available, so the line suits the frame instead of standing out. We are often asked to deal with gaps left after new windows were fitted and cracked sealant at the sill ends, on composite doors, aluminium frames and uPVC windows.
Around Highbrook, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
Our work is backed for twelve months, in Highbrook and everywhere else we cover.
- Place
- Highbrook (RH17)
- Region
- West Sussex
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Landlord and commercial work in Highbrook
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
If you manage several properties in or around Highbrook, several properties can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
Highbrook questions
Do you work for landlords with property near Balcombe station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Can you do window mastic in Highbrook?
Yes, Highbrook is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear price.
Do you have sealant for grey or black windows?
Yes. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
Does the work come with a guarantee?
Yes. All our work carries a 12-month guarantee, and we’re fully insured.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status and we’re fully insured too.
Is it messy?
Not at all. The area is protected while we work and cleaned up afterwards.
Where are you based?
We work from Crawley. We cover Highbrook and the rest of West Sussex.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in, and for outside work we’ll agree access with you when we book.
When it is not the sealant
We’d rather tell you now than do work that won’t last, so these are the limits:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Damp coming through the wall itself rather than the frame joint
- Rotten timber, which needs a joiner first
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before booking.
Where we work in Highbrook
- Patio & French doors
- Aluminium frames
- Composite doors
- uPVC windows
- Timber windows & doors
- Window sills
DIY versus a professional 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.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
What the job involves on each surface
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A tidy bead in anthracite grey, black or a matching colour suits the frame.
Composite doors
Draughts round the door leaf generally come from worn seals or adjustment, not the mastic. We seal the frame and let you know about anything else.
What happens if it’s left?
If you are painting or rendering, reseal at the same time. A clean new bead makes new paint or render look finished. Older cottages and farmhouses around Highbrook can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Doing several joints on one visit normally makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear price for the lot.
Why us?
- Sanitary silicone with an anti-fungal additive in wet areas
- Sealant colour chosen to suit
- 4.9 on Google from 180+ five-star reviews
- Arbo and Everbuild products
See what affects the cost and our reviews.
How it works
Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a morning for a couple of windows and a door. For a village or hamlet like Highbrook, the journey is planned in advance: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Move anything stored near the joints
- Mention any sign-in or site rules at work premises
- Mention if the joints have been sealed before
Getting a quote
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we’ll take it from there.
Related advice
Also near Highbrook
More services for Highbrook
Frames and glazing around Highbrook
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Priest House (about 1.5 miles north) are a reminder that the area around Highbrook has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For site and facilities teams at buildings such as St Peter's CofE Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Rented homes near Balcombe station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Highbrook is about 4 miles north-east of Haywards Heath, in West Sussex. For window mastic in and around Highbrook, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We cover West Sussex from our Crawley base, Highbrook included. Across West Sussex, we cover 371 places, and Highbrook is one of them. You can also see our page for Crawley, roughly 7 miles from Highbrook.
Postcode districts we cover here for window mastic: RH17. We also cover the places around Highbrook: Ardingly (1 mile south-west), Little London (1 mile west), Sharpthorne (2 miles north), West Hoathly (2 miles north) and Horsted Keynes (2 miles south-east). We also work in nearby towns such as Crawley (7 miles north-west), Horsham (11 miles west), Haywards Heath (4 miles south-west), Burgess Hill (7 miles south-west), East Grinstead (5 miles north) and Broadfield (7 miles north-west).
Near you in Highbrook
Typical jobs here are in homes near The Ardingly Inn and the streets around them. The closest station to Highbrook is Balcombe station, about 3.4 miles west of the centre. Well-known places in the area include Princess Royal Hospital (4.6 miles south) and Parish Museum (2.8 miles south). The countryside around Highbrook includes Blunts Wood and Paiges Meadow.