West Sussex · England
Window & door mastic in East Dean, West Sussex
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in East Dean. Fully insured, ARBOMaster approved and guaranteed for a year.
- Cracked internal joints between frame and plaster
- Cold air getting in at the frame edge
- Rushed sealant from a window installation
Leave it or put it right?
A cracked joint around a frame lets rain into the wall. Over time that can mean damp patches, damaged plaster and rotting timber. A reseal is a much smaller job. Where a wall is exposed, as many are in small places like East Dean, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Leaving a failed joint generally makes the job bigger, not smaller. If you are not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in East Dean
- Any old sealant cut out fully, not covered over
- An ARBOMaster approved applicator
- White, clear, grey or coloured to suit, where the product allows
- We leave the area clean and tidy
Take a look at our cost guide or our reviews.
Window mastic in East Dean
The new joint does not have to be white. We can seal in white, brown, anthracite grey, black or clear, so the line suits the frame instead of standing out. Common call-outs are for rushed sealant from a window installation and cracked or shrunken mastic around the frame, on composite doors, patio & French doors and timber windows & doors.
In a village or hamlet like East Dean, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
We stand behind the work with a 12-month guarantee.
- Place
- East Dean (PO18)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How the visit works
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes most of a day for a typical house, less for a few frames. In a small place like East Dean, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Clear the area around the work
- Keep children and pets away from the work area
How to get a quote
Want a quote for window mastic? Please phone 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
Common problems we fix in East Dean
Sun, frost and rain wear sealant out. Sunlight dries the surface out, until it loses its stretch and starts to crack.
The problems people usually mention when they call include:
- Rushed sealant from a window installation
- Whistling draughts around closed windows
- Cracked internal joints between frame and plaster
- Sealant in the wrong colour for the frame
Around East Dean, as everywhere, window mastic is only as good as the preparation behind it.
What to look for in a quote
- What preparation is included
- The length of the guarantee
- Whether VAT is included
- What product goes in the joint
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What we can’t put right
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Rotten timber, which needs a joiner first
- Faulty window hardware
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before booking.
What we seal
- Aluminium frames
- Window sills
- Patio & French doors
- Composite doors
- uPVC windows
- Timber windows & doors
Landlord and commercial work in East Dean
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.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Window mastic in East Dean: local notes
With historic houses such as West Dean House (about 2.6 miles west) nearby, there’s older building stock in the area around East Dean as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Homes close to The Parish Church of All Saints include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
East Dean is about 6 miles north-east of Chichester, in West Sussex. Anywhere in PO18, we cover window mastic for homes and businesses. East Dean is one of 371 places in West Sussex where we work. For nearby work, see our Portsmouth page (17 miles or so).
Jobs for window mastic in PO18 works the same way as everywhere else we cover. If you need window mastic at a property on Main Road, Chapel Row and Charlton Road or anywhere close by, our applicators can take on the job. If you are just outside East Dean, we cover Charlton (1 mile west), Singleton (2 miles west), West Dean (3 miles west), Heyshott (3 miles north) and Cocking (3 miles north-west). We also work in nearby towns such as Worthing (15 miles south-east), Bognor Regis (8 miles south), Chichester (6 miles south-west), Selsey (13 miles south), Littlehampton (11 miles south-east) and Emsworth (10 miles south-west).
Near you in East Dean
We work in homes and buildings around The Star And Garter Public House. A little further out are Weald and Downland Gridshell (1.8 miles west) and Chichester Centre (5 miles south-west). Not far away are Graffham Common and Levin Down.
How we quote for window mastic
We quote each job individually. These are the things that affect it:
- How many rooms, windows or areas are involved
- The type of sealant required
- Working hours on commercial sites
- How easy the joints are to reach
What it costs depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before any work starts.
Helping us quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- What’s wrong with the joints now
- Whether it’s a home or a business
- Whether it has been sealed before
- Any access issues, like height or stairs
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
More services for East Dean
Questions from East Dean
What guarantee comes with window mastic in East Dean?
All our work, in East Dean and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Can you do window mastic in East Dean?
Yes. We work across London and the South East, and East Dean is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
When is the sealant fully cured?
Different products cure at different speeds, so follow the cure time we give you.
Do I have to be there?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Can I paint over the new sealant?
Silicone generally will not take paint. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
Which products do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
Do you have insurance?
Yes. We’re fully insured, and we can confirm the details when we quote.