West Sussex · England
Window Mastic in Balcombe
Specialist window mastic for Balcombe: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- White mastic on grey or black frames
- Draughts coming in around windows and doors
- Untidy mastic left by window fitters
Window mastic in Balcombe, done properly
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that can’t move properly, so deep gaps get backing rod first. The sealant then grips the two sides it should. We work on timber windows & doors, uPVC windows and window sills, and common reasons people get in touch are sealant in the wrong colour for the frame and gaps left after new windows were fitted.
Homes in small places like Balcombe often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
A 12-month guarantee comes as standard.
- Place
- Balcombe (RH17)
- Wider area
- West Sussex
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. 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
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We can talk through the options.
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the new bead is laid against the frame and the wall and tooled smooth.
Also near Balcombe
Also in Balcombe
Honest limits
We will not take on work that will not last, so here’s what sealant cannot put right:
- Faulty window hardware
- Penetrating damp from a failed cavity tray or render
- Misting between the panes of a double-glazed unit (that needs a new unit)
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Surfaces we seal
- Composite doors
- Aluminium frames
- Window sills
- Timber windows & doors
- Patio & French doors
- uPVC windows
Quotes for window mastic in Balcombe
We don’t publish a price list, because no two jobs are the same. The quote depends on:
- The number of rooms or windows
- Whether the work is at height
- Whether old sealant or filler has to be cut out
- The product the joint needs
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Any previous sealing or DIY work
- How many joints, rooms or windows are involved
- The type of property
- Where the job is, and your postcode
Asking for a quote is easy: let us know what needs doing and where, and roughly how big it is. A few photos by email make the job easier to understand, and we will take it from there.
Window mastic in Balcombe: local notes
Historic houses like Tyes Place (about 2.1 miles south-west) are a reminder that the area around Balcombe has older buildings as well as new. 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. 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.
If you live in an older home near The Parish Church of St Mary, the joint between an old wall and a newer frame is normally the first place rain gets in. If you let a flat or house near Balcombe station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. Managing a site like Balcombe CofE Controlled Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Balcombe is about 4 miles north of Haywards Heath, in West Sussex. From the centre of Balcombe to the outskirts, window mastic is available for homes and businesses alike. Our West Sussex coverage runs to 371 places, and Balcombe is one of them.
Here we cover the RH17 postcode area for window mastic. Streets in the area include London Road, Stockcroft Road and Deanland Road, all of which we cover. Main roads around Balcombe include the B2036, which makes travel easy. We also cover Balcombe Lane (1 mile north), Brook Street (2 miles south), Staplefield (2 miles south-west), Worth Abbey (3 miles north) and Whitemans Green (3 miles south). Further out, we also cover Crawley (5 miles north-west), Horsham (8 miles west), Haywards Heath (4 miles south), Burgess Hill (7 miles south), East Grinstead (7 miles north-east) and Broadfield (4 miles north-west).
Local landmarks in Balcombe
Balcombe has its own railway station: Balcombe station. Other landmarks nearby include Princess Royal Hospital (4.9 miles south) and Cuckfield Museum (3.5 miles south). The countryside around Balcombe includes Blunts Wood and Paiges Meadow and Tilgate Lake.
How to look after the new joints
Aftercare is simple:
- Ventilate rooms so frames don’t stay wet inside
- Keep solvents and bleach off the sealant
- Walk round the house once a year and look at the joints
- Clean frames with a soft cloth and soapy water
A yearly look round the frames is enough. Cracks and lifting edges are easy to spot early, and if anything looks wrong, just phone 0345 464 0079 or drop us an email.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Landlord and commercial work in Balcombe
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
How it works
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself generally takes a few hours for a few frames, or a day or more for a whole house, depending on the size of the job. In a small place like Balcombe, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Move anything stored near the joints
- Tell us about access, such as stairs, a lift or high-level joints
- Keep pets and children clear of the area while we work
How to get a quote
Every job is quoted individually. Just phone 0345 464 0079 or drop us an email with the details.
Related advice
Common questions in Balcombe
Do you work for landlords with property near Balcombe station?
Yes, we work for landlords and agents. You can ring 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
Do you cover Balcombe for window mastic?
Yes. Our work covers London and the South East, and Balcombe is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
Will the old sealant be removed?
Yes, always, and completely. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
How long should I leave it?
Cure times vary by product and the conditions. We tell you how long to leave it before we go.
Should I try DIY first?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Will you leave a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.