West Sussex · England
Window & door mastic in Street End, West Sussex
Window mastic for Street End, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Black, perished sealant on frames
- Gaps between the frame and the inside reveal
- Gaps where the sill meets the wall
About our window mastic in Street End
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. We seal one or both, depending on what’s needed. If you have cracked sealant at the sill ends and hard, cracked sealant around windows, we can put it right.
Homes in small places like Street End often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
Whatever the size of the job, it’s backed by our 12-month guarantee in Street End and across West Sussex.
- Location
- Street End (PO20)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What happens if it’s left?
Running fresh sealant over the old joint is tempting, but it will not grip old, dirty sealant. It soon lifts and the leak carries on behind it. The old mastic has to come out. Older cottages and farmhouses around Street End can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Why book with us
- We never seal over old sealant
- Arbo and Everbuild products
- White, clear, grey or another colour, product permitting
- Fully insured
Take a look at our cost guide and customer reviews.
Different surfaces, different methods
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the threshold joint takes a lot of water. Each is cleaned, backed where deep and resealed.
Composite doors
Draughts round the door leaf normally come from worn seals or adjustment, not the mastic. We’ll tell you if that is what we find.
Street End homes and the weather
Street End 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. 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.
Rented homes near Chichester station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints. For site and facilities teams at buildings such as Sidlesham Primary School, its window and door frames need their mastic kept sound, just like a home’s. Homes close to St Mary Our Lady Sidlesham include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Street End is about 4 miles north of Selsey, in West Sussex. Whether you’re in the middle of Street End or further out, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Across West Sussex, we cover 371 places, Street End among them. There’s also a page for Portsmouth, about 13 miles away.
Jobs for window mastic in PO20 works the same way as everywhere else we cover. We cover properties on Church Lane, Selsey Road and Chalder Lane and the roads around them. Nearby, we also carry out window mastic in Sidlesham Common (1 mile north-west), Sidlesham (1 mile south), Keynor Estate (1 mile south), Fisher (1 mile north-east) and South Mundham (2 miles north-east). Larger places within reach include Bognor Regis (5 miles east), Chichester (4 miles north), Selsey (4 miles south), Littlehampton (11 miles east), Emsworth (8 miles north-west) and Rustington (12 miles east).
Landmarks near Street End
The closest station to Street End is Chichester station, about 3.2 miles north of the centre. A little further out are Chichester Castle (3.8 miles north) and Chichester Cathedral Treasury (3.4 miles north).
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Do not aim a pressure washer at the joints
- Keep drainage slots and sill grooves clear
- Check the mastic once a year
- Repaint timber before it’s bare
A yearly look round the frames is enough. Cracks and lifting edges are easy to spot early.
Leaks normally show up in wet, windy weather, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
What affects the quote in Street End
There’s no set price list. The quote depends on:
- The number and length of the joints
- The product the joint needs
- Whether old sealant or filler has to be cut out
- Whether the work is at height
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first and give you a clear price before work begins.
What to tell us for a quote
To make quoting easier, please include:
- Any previous sealing or DIY work
- A few photos by email, if you can
- How we’d reach the joints
- Where the property is
We do not publish a price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or drop us an email.
How the visit works
Good joint work is mostly preparation, so that’s where we spend the time. Joints are cleaned back and dried before anything new goes in. In total, it normally takes a morning for a couple of windows and a door. Somewhere as small as Street End, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Where the joints are inside, avoid wetting them before we arrive
- Tell us if parking is tricky
Ask for a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Read more
Street End: your questions answered
Is Street End within the area you cover?
Yes, we do. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near Chichester station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Where is Mr Mastic based?
We’re a Crawley-based firm. We work across South East England, London and Scotland.
Can resealing stop a draught around my window?
Often, yes. Air often gets in between the frame and the wall, and resealing inside and out closes it.
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.
Do you seal inside as well as outside?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We can do either or both.
Do you guarantee window mastic?
Yes. Our 12-month guarantee covers every job, inside or out.
Will the old sealant be removed?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Places near Street End
Also in Street End
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- A sash or casement that won’t close properly
- Damp problems in the wall away from the window
- Misting between the panes of a double-glazed unit (that needs a new unit)
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before booking.
What we seal
- Aluminium frames
- Composite doors
- Window sills
- uPVC windows
- Timber windows & doors
- Patio & French doors