West Sussex · England
Window & door mastic in Charlton, West Sussex
Window mastic across Charlton and nearby, with every bit of old sealant taken out first.
- Draughty joints inside around the window
- Leaking joints at the ends of sills
- Mastic that has split away from the wall
For landlords and businesses
We work for landlords and agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
In hotels, rooms out of use cost money, so we plan the work room by room. Hotel work is part of what we do, alongside homes and businesses.
Window mastic for homes and businesses in Charlton
Frames and walls do not move together. Heat and cold make frames grow and shrink against brick or render that hardly moves. That’s why the joint needs a flexible, low-modulus sealant rather than something rigid. We’re often asked to deal with rushed sealant from a window installation and mastic that’s falling out in pieces, across aluminium frames, uPVC windows and window sills.
In a village or hamlet like Charlton, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we will put it right.
- Place
- Charlton (PO18)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Common questions in Charlton
Do you cover smaller places like Charlton?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is window mastic in Charlton guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We’re also fully insured and ARBOMaster approved.
Can I paint over the new sealant?
It depends on the sealant. Some hybrid sealants can be painted; silicone can’t. Mention any painting plans before any work starts.
Can landlords and businesses book you?
Yes. As well as householders, we work for landlords, agents, businesses and hotels.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Can you seal the gap between the frame and the plaster indoors?
Yes. Indoors, we seal between the frame and the plaster or reveal, using a paintable sealant if you want to decorate.
What sealant do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Will it make a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Windows and doors in Charlton
Historic houses like West Dean House (about 1.7 miles west) are a reminder that the area around Charlton 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’s traditional sand mastic. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as Singleton CofE Primary School, the mastic around its windows and doors needs looking after like any other building’s. If you live in an older home near The Parish Church of the Blessed Virgin Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Charlton is about 5 miles north of Chichester, in West Sussex. Anywhere in PO18, we can carry out window mastic at your property. We cover 371 towns and villages across West Sussex. We also work in Portsmouth, around 16 miles away.
Every address in PO18 is within our area for window mastic, from the main roads to the quietest streets. We cover properties on Charlton Road and Knight's Hill. Neighbouring places we cover for window mastic include Singleton (1 mile west), East Dean (1 mile east), West Dean (2 miles west), Cocking (3 miles north) and Heyshott (3 miles north). We also work in nearby towns such as Bognor Regis (9 miles south), Chichester (5 miles south), Selsey (12 miles south), Littlehampton (11 miles south-east), Emsworth (10 miles south-west) and Rustington (12 miles south-east).
What’s near Charlton
Well-known places in the area include Chichester Centre (4.6 miles south) and Weald and Downland Gridshell (0.8 miles west). Green spaces nearby include Levin Down and Kingley Vale National Nature Reserve.
How the job changes by surface
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so they get particular care.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We will tell you which suits your home.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Paint up to the joint, not over it
- Repaint timber before it’s bare
- Air rooms to keep condensation down around windows
- Clear any debris from frame drain holes
Timber frames need their paint kept up, since wood that gets wet swells and shrinks more. Keep paint off the silicone itself.
Wet, windy weather is when failed mastic shows itself, but sealant goes on best when frames and walls are dry. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Nearby places to Charlton
What else we do in Charlton
Why it’s worth doing now in Charlton
Resealing frames is a short job: the visit takes a few hours for a handful of frames, longer for a whole house. Wait for damp to appear and there may be plaster and decorating to sort out too. Older cottages and farmhouses around Charlton can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
The cost depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before work begins.
Why us?
- We agree the colour with you first
- Anti-fungal sanitary silicone in wet areas
- Experience in homes, commercial sites and hotels
- An ARBOMaster approved applicator
Take a look at our cost guide or customer reviews.
What we do, step by step
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. It usually takes anything from an hour or two to a full day, depending on how many frames there are. Somewhere like Charlton needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Mention any leaks or damp you’ve noticed
- Tell us if parking is tricky
- For business premises, tell us about site rules or sign-in
Getting a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Read more
Should I try it myself first?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
When it isn’t the sealant
It helps to know what we can’t do too:
- Penetrating damp from a failed cavity tray or render
- A failed sealed unit that has misted up
- Rotten timber, which needs a joiner first
If you’re not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Joints and surfaces we work on
- Composite doors
- Aluminium frames
- Window sills
- uPVC windows
- Timber windows & doors
- Patio & French doors