West Sussex · England
Window & door mastic in Handcross, West Sussex
Mastic around window and door frames, sills and patio doors for householders, landlords and businesses in Handcross. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Whistling draughts around closed windows
- Mastic that is falling out in pieces
- Water coming in at the bottom corners of a door
What happens on the day
Before we leave, we go over the finished joints with you and tell you how long to leave it. The visit itself usually takes a few hours for a few frames, or a day or more for a whole house, depending on the size of the job. For a village or hamlet like Handcross, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We check each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Keep pets and children clear of the area while we work
- Move anything stored near the joints
Ask for a quote
If you are in Handcross and need window mastic, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before any work starts.
Related advice
Window mastic for homes and businesses in Handcross
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re ARBOMaster approved and fully insured, and every job is covered by a 12-month guarantee. Typical jobs include rushed sealant from a window installation and hard, cracked sealant around windows, on composite doors, patio & French doors and timber windows & doors.
Somewhere as small as Handcross, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Place
- Handcross (RH17)
- Wider area
- West Sussex
- Cover
- A year, on every job
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What the job involves on each surface
Window sills
Masonry sills can have joints where water gets in, and the joint under the frame can let rain run behind. Those are sealed with a product suited to stone or concrete.
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. We cut it out, back any deep gaps and reseal properly.
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Rotten timber, which needs a joiner first
- A failed sealed unit that has misted up
- Damp problems in the wall away from the window
If in doubt, ring 0345 464 0079 or drop us an email and we will say what we think before booking.
Surfaces we seal
- Timber windows & doors
- Patio & French doors
- Composite doors
- Window sills
- Aluminium frames
- uPVC windows
Places near Handcross
Other services in Handcross
What affects the quote in Handcross
Your quote is based on your job. We look at:
- The number of rooms or windows
- The amount of work
- Which sealant suits the joint
- Whether the work is at height
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
What to tell us for a quote
When you contact us, it’s useful to know:
- Access, such as stairs, a lift or height
- A few photos by email, if you can
- Any previous sealing or DIY work
- What’s wrong with the joints now
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Do you need window mastic in Handcross?
Water runs down the glass onto the sill, and the ends of the sill, where it meets the wall, are where it gets in. Failed sealant there lets rain into the wall or behind the frame.
Keep an eye out for these signs:
- Rushed sealant from a window installation
- Sealant in the wrong colour for the frame
- Black, perished sealant on frames
- Draughts coming in around windows and doors
For an older house near a landmark such as All Saints, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What your quote should include
- Whether all the old sealant comes out first
- How much experience the applicator has
- Whether VAT is included
- What happens if they find a problem under the old sealant
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Keeping the joints in good condition
Aftercare is simple:
- Clean frames with a soft cloth and soapy water
- Don’t paint over the silicone
- Keep paint and stain on wooden frames in good order
- Air rooms to keep condensation down around windows
Try not to touch the new joint while it cures, for as long as we advise. Do not point a pressure washer at the joints.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and a cold room gets colder. A new joint closes it up.
Windows and doors in Handcross
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Tyes Place (about 1.9 miles south-east) nearby, there’s older building stock in the area around Handcross as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Rented homes near Balcombe station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints. For site and facilities teams at buildings such as Handcross Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Handcross is about 4 miles south of Crawley, in West Sussex. Wherever you are in the RH17 postcode area, we can carry out window mastic at your property. Handcross is one of 371 towns and villages in West Sussex where we work.
We cover every part of the RH17 postcode area for window mastic and the streets around it. Whether your property is on High Street, London Road and Windmill Platt or anywhere close by, we can help. If you are just outside Handcross, we cover Slaugham (1 mile south), Plummers Plain (2 miles south-west), Colgate (3 miles north-west), Broadfield (3 miles north) and Lower Beeding (3 miles south-west). We also work in nearby towns such as Crawley (4 miles north), Horsham (5 miles west), Haywards Heath (6 miles south-east), Burgess Hill (7 miles south-east), East Grinstead (10 miles north-east) and Shoreham-by-Sea (15 miles south).
Around Handcross
In Handcross, that means homes and buildings near The Royal Oak Public House and Handcross Park School. The closest station to Handcross is Balcombe station, about 2.8 miles east. A little further out are Crawley Hospital (4.3 miles north). Green spaces nearby include Tilgate Lake and Blunts Wood and Paiges Meadow.
Questions from Handcross
Can you do window mastic in Handcross?
Yes. We work across London and the South East, and Handcross is part of that. Just call 0345 464 0079 or email us with a few details of the job.
I let a flat near Balcombe station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Where do you work from?
Our base is in Crawley, and we work across South East England, London and Scotland.
Can you match the sealant to my frames?
Yes, in most cases. Mention the frame colour when you ask for a quote and we’ll use the nearest match.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can resealing stop a draught around my window?
In many cases. The gap between frame and wall is a common source of draughts, and resealing inside and out closes it.
What should I tell you?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply phone 0345 464 0079 or drop us an email.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.