West Sussex · England
Window Mastic in Chelwood Gate
Mastic around window and door frames, sills and patio doors for homes and businesses in Chelwood Gate and across West Sussex. Fully insured, ARBOMaster approved and guaranteed for a year.
- Rushed sealant from a window installation
- Mastic that has split away from the wall
- Whistling draughts around closed windows
For landlords and businesses
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Window mastic in Chelwood Gate, done properly
Around Chelwood Gate we seal all kinds of frames: uPVC, aluminium, timber and composite, along with patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. If you have draughts coming in around windows and doors and white mastic on grey or black frames, we can help, on aluminium frames, window sills and timber windows & doors alike.
Mastic can only go onto a dry, clean joint, so window work in Chelwood Gate is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
You’re covered for a year from the day we finish. If there’s a problem with it, please phone 0345 464 0079 or email us.
- Location
- Chelwood Gate (RH17)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quote
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Chelwood Gate
More services for Chelwood Gate
How it works
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours for a few frames, or a day or more for a whole house and we leave things clean and tidy. For a village or hamlet like Chelwood Gate, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
How to get a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we’ll talk you through the work.
Related advice
What we can’t put right
We’ll always be straight with you, so here’s what sealant can’t fix:
- Damp problems in the wall away from the window
- Rotten timber, which needs a joiner first
- Condensation trapped between the panes
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly.
Joints and surfaces we work on
- Composite doors
- Timber windows & doors
- Aluminium frames
- Patio & French doors
- Window sills
- uPVC windows
Why deal with it now?
Choosing the product is half the job. Interior caulk and bathroom silicone aren’t made for exterior frame joints. An exterior, low-modulus sealant stays flexible in sun and frost. Where a wall is exposed, as many are in small places like Chelwood Gate, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
What you get with us
- Fully insured
- We leave the area clean and tidy
- 180+ five-star Google reviews
- Every job guaranteed for a year
Take a look at our cost guide and our reviews.
Chelwood Gate homes and the weather
With historic houses such as Priest House (about 3.8 miles north-west) nearby, there’s older building stock in the area around Chelwood Gate as well as newer homes. 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.
In and around Chelwood Gate, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
Chelwood Gate is about 6 miles south of East Grinstead, in West Sussex. We carry out window mastic for homeowners, landlords and businesses in Chelwood Gate. Our West Sussex coverage runs to 371 places, Chelwood Gate among them. Crawley is on our list too, around 10 miles away.
Every address in RH17 is within our area for window mastic. Local streets include Beaconsfield Road, Stone Quarry Road and Isle of Thorns. Other places close to Chelwood Gate include Chelwood Common (1 mile south), Birchgrove (1 mile west), Wych Cross (1 mile north), Danehill (2 miles south-west) and Nutley (2 miles south-east). Within a short drive, we also cover Crawley (10 miles north-west), Horsham (15 miles west), Haywards Heath (6 miles south-west), Burgess Hill (9 miles south-west), East Grinstead (6 miles north) and Broadfield (10 miles west).
Near you in Chelwood Gate
Well-known places in the area include Waterbury Castle (2.6 miles west) and Crowborough War Memorial Hospital (5.9 miles east). For a walk, there’s Brickfield Meadow.
Your questions about window mastic in Chelwood Gate
Can you do window mastic in Chelwood Gate?
Yes. Our work covers London and the South East, and Chelwood Gate is part of that. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Will you come out to Chelwood Gate?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you work on first-floor windows?
Yes, if safe access is possible. Higher or awkward frames may need extra access, and we will confirm what’s needed.
I rent my home. Can I book you?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Do you guarantee window mastic?
Yes, for 12 months. Keeping drainage clear and checking the joints yearly helps them last.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Can you quote for more than one area?
Yes. Just list everything you need and you’ll get one quote.
What does window mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
What affects the cost of window mastic
Every job gets its own quote. These are the things that affect it:
- Access and height
- How many rooms, windows or areas are involved
- The type of sealant required
- The number and length of the joints
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- The rough size of the job
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
- Pictures of the joints, sent by email
If you are in Chelwood Gate 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 we’ll agree the price before any work begins.
Do you need window mastic in Chelwood Gate?
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, and a gap opens along one edge.
Look out for any of the following:
- Rushed sealant from a window installation
- Mastic that has split away from the wall
- Water coming in at the bottom corners of a door
- Whistling draughts around closed windows
In the older streets around Chelwood Gate Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before booking
- Which colour the sealant will be
- Whether all the old sealant comes out first
- What product goes in the joint
- How much experience the applicator has