West Sussex · England
Window Mastic in Hunston
We cover Hunston for mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and every job guaranteed for a year.
- Cold air getting in at the frame edge
- Old mastic that has gone black or come away
- Damp patches on the reveal after heavy rain
Why it’s worth doing now in Hunston
A quick bead over the top of old mastic looks like an easy fix, but it won’t grip old, dirty sealant. It peels before long, and water still gets in behind. Proper resealing starts with removing the old joint. In a small place like Hunston, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts.
Why us?
- Homes, businesses and hotels
- You choose the colour before work begins
- 20+ years of sealant experience
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at our cost guide or what customers say.
How we handle window mastic in Hunston
Homes in Hunston have every kind of window: from uPVC casements to timber and aluminium, along with patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. Common call-outs are for mastic that’s falling out in pieces and cracked sealant at the sill ends, across window sills, patio & French doors and uPVC windows.
Homes in small places like Hunston often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Hunston (PO20)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Clean frames with a soft cloth and soapy water
- Check the mastic once a year
- Repaint timber before it’s bare
- Keep paint off silicone joints
Keep the new mastic undisturbed while it cures, following the cure time we give you. Do not point a pressure washer at the joints.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
Surface by surface
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. Most leaks start at the bottom corners, so they get particular care.
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. We will point out any rot we find, as that is a job for a joiner.
When it isn’t the sealant
We won’t take on work that will not last, so here’s what sealant can’t put right:
- A sash or casement that will not close properly
- Draughts through the window seals rather than the frame
- Damp problems in the wall away from the window
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly.
Surfaces we seal
- Timber windows & doors
- Patio & French doors
- Window sills
- Composite doors
- Aluminium frames
- uPVC windows
Towns and villages near Hunston
What else we do in Hunston
Hunston homes and the weather
Hunston is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on the mastic around window and door frames, which can dry out and crack sooner where a building faces the weather. With historic houses such as Goodwood House (about 4.5 miles north) nearby, there’s older building stock in the area around Hunston as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For landlords with property near Chichester station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. If you look after a building such as North Mundham Primary School, its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near St Leodegar's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Hunston is about 2 miles south of Chichester, in West Sussex. Across the PO20 area, our applicators can take on window mastic. Hunston is one of 371 places in West Sussex we cover for window mastic. For nearby work, see our Portsmouth page, about 13 miles away.
Work in PO20 is quoted and booked the same way as anywhere else. Streets in the area include Heath Close, Westlands Road and St Leodegars Way. We also cover the places around Hunston: Donnington (1 mile west), North Mundham (1 mile east), Runcton (1 mile east), Portfield (2 miles north) and Chichester (2 miles north). Within a short drive, we also cover Bognor Regis (4 miles east), Selsey (5 miles south), Littlehampton (11 miles east), Emsworth (8 miles west), Rustington (12 miles east) and Angmering (13 miles east).
Local landmarks in Hunston
Typical jobs here are in homes near Chichester High School For Girls and The Spotted Cow Public House. The closest station to Hunston is Chichester station, about 1.5 miles north. Other landmarks nearby include St Richard's Hospital (2.3 miles north) and Chichester Castle (2 miles north).
Work for landlords, hotels and businesses
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll give you a quote.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
What affects the quote in Hunston
For a quick quote, just ask. The main things that affect it are:
- The number and length of the joints
- The type of sealant required
- How much old sealant there is and how hard it is to remove
- Any working-time requirements on site
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
Before you ask for a quote, have a think about:
- A few photos by email, if you can
- Access, such as stairs, a lift or height
- The problem you’ve noticed
- Where the property is
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
Questions from Hunston
I let a flat near Chichester station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just phone 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear quote.
Do you cover smaller places like Hunston?
Yes, Hunston is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
How long will my window job take?
A handful of frames is a short visit, while a whole house takes longer. We confirm the timing with your quote.
Can I paint over the new sealant?
That depends on the product. Silicone isn’t paintable, but some hybrid sealants are. Mention any painting plans before any work starts.
Are you fully insured?
Yes. We’re fully insured, and we have been doing sealant work for more than 20 years.
Can you quote for more than one area?
Yes, we can. More than one area can go on one quote.
Where are you based?
We work from Crawley. We cover Hunston and the rest of West Sussex.
Can you match the sealant to my frames?
Yes, we choose a colour to suit the frame. Anthracite grey, black, brown and white cover most frames, with clear as an option.
How it works
We bring everything the job needs with us, so there’s nothing for you to buy. Once we’ve agreed what’s being done, we protect the area and start. It normally takes anything from an hour or two to a full day, depending on how many frames there are. In a small place like Hunston, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- 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, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Preparing for the visit
- Mention any tricky access
- Keep pets and children clear of the area while we work
- For business premises, tell us about site rules or sign-in
Get a quote
For window mastic in Hunston, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before any work starts.