West Sussex · England
Sidlesham Common Window Mastic
Specialist window mastic for Sidlesham Common: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Old mastic that has gone black or come away
- Whistling draughts around closed windows
- Water coming in at the bottom corners of a door
Window mastic in Sidlesham Common, done properly
The new joint doesn’t have to be white. We can seal in white, brown, anthracite grey, black or clear, so the bead blends with the window rather than framing it. We work on aluminium frames, composite doors and patio & French doors, and common reasons people get in touch are cold air getting in at the frame edge and sealant in the wrong colour for the frame.
Somewhere as small as Sidlesham Common, 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.
We stand behind the work with a one-year guarantee.
- Place
- Sidlesham Common (PO20)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Sidlesham Common questions
Is window mastic in a coastal place like Sidlesham Common any different?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Will you come out to Sidlesham Common?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is the work guaranteed?
Yes. Each job is covered for 12 months, inside or out.
How long does it take to reseal the windows on a house?
A handful of frames is a short visit, while a whole house takes longer. We confirm the timing with your quote.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll give you the cure time for the product we used before we leave.
Can you seal over the old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
Can you do upstairs windows?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we will confirm what’s needed.
What does window mastic cost?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Windows and doors in Sidlesham Common
Sidlesham Common is within about 2 miles of 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. 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.
If you live in an older home near St Mary Our Lady Sidlesham, the joint between an old wall and a newer frame is usually the first place rain gets in.
Sidlesham Common is about 3 miles south of Chichester, in West Sussex. Wherever you are in the PO20 postcode area, our applicators can take on window mastic. Sidlesham Common is one of 371 places in West Sussex where we work for window mastic. Portsmouth is on our list too, about 12 miles from Sidlesham Common.
Jobs for window mastic in PO20 works the same way as everywhere else we cover. Whether your property is on Chichester Road and Jury Lane or anywhere close by, we can help. Neighbouring places we cover for window mastic include Street End (1 mile south-east), Sidlesham (1 mile south), Fisher (1 mile east), Keynor Estate (2 miles south) and South Mundham (2 miles east). Larger places within reach include Bognor Regis (5 miles east), Chichester (3 miles north), Selsey (4 miles south), Littlehampton (12 miles east), Emsworth (7 miles north-west) and Rustington (13 miles east).
Near you in Sidlesham Common
In Sidlesham Common, that means homes and buildings near The Blacksmith's Arms Public House, among other places. Sidlesham Common’s nearest station is Chichester station, about 2.6 miles north. Nearby you’ll also find Chichester Cathedral Treasury (2.9 miles north) and Chichester Castle (3.2 miles north). For a walk, there’s Nutborne Marshes.
Common problems we fix in Sidlesham Common
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
It’s worth asking for a quote if you see:
- Draughts coming in around windows and doors
- Rushed sealant from a window installation
- White mastic on grey or black frames
- Mastic that has split away from the wall
Rented homes near Chichester station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Comparing quotes
- Whether VAT is included
- How the surfaces are prepared before sealing
- What the cure time is
- What happens if the job turns out different
Aftercare tips
To keep the joints looking good and working properly:
- Avoid harsh chemicals near the mastic
- Check the mastic once a year
- Wash the frames with mild soapy water
- Do not paint over the silicone
Wipe the frames with soapy water when you clean the windows, and avoid solvent cleaners on the sealant.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
Towns and villages near Sidlesham Common
Also in Sidlesham Common
What happens on the day
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and clear up. Most jobs take a morning for a couple of windows and a door. Somewhere like Sidlesham Common needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- First we look at every frame and agree the list.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
Preparing for the visit
- Mention if the joints have been sealed before
- Tell us if parking is tricky
- Try not to wet indoor joints just before the visit
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, call 0345 464 0079 or send us an email.
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Landlord and commercial work in Sidlesham Common
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Landlords and letting agents in Sidlesham Common can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Surface by surface
Composite doors
Front doors take the weather head on. We pay most attention there.
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We can talk through the options.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
If you’ve already had a go yourself, that is fine. We cut it out and start again, so tell us about it when you ask for a quote.
When something else is needed
Sealant is not the answer to every problem, and we’ll tell you before work begins. Sealant won’t put right:
- A door that needs adjusting, rehanging or new seals
- Faulty window hardware
- Damp problems in the wall away from the window
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think before booking.
Where we work in Sidlesham Common
- Timber windows & doors
- Aluminium frames
- Window sills
- uPVC windows
- Composite doors
- Patio & French doors