East Sussex · England
Window & door mastic in South Street, East Sussex
Mastic around window and door frames, sills and patio doors in South Street, with a 12-month guarantee on every job. Call for a quick quote.
- Mastic that is falling out in pieces
- Rain getting in at the frame or under the sill
- Draughty joints inside around the window
For landlords and businesses
We work for landlords and letting agents as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Window mastic in South Street
Frames and walls don’t move together. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. So the sealant has to stretch and recover, which is why we use a low-modulus product. We’re often asked to deal with old mastic that has gone black or come away and cracked internal joints between frame and plaster, on aluminium frames, composite doors and uPVC windows.
Somewhere as small as South Street, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
There’s a 12-month guarantee on every job, large or small.
- Location
- South Street (BN8)
- Region
- East Sussex
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
South Street: your questions answered
Do you cover smaller places like South Street?
Yes, South Street 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.
Do you cover South Street for window mastic?
Yes. We work across London and the South East, and South Street is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear price.
Do you remove the old sealant?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected.
Are you ARBOMaster approved?
Yes. We’re approved under the ARBOMaster scheme, the approved applicator scheme for Arbo sealants.
Do you work for landlords and businesses?
Yes. We work in homes, commercial premises and hotels.
Can you reach windows above the ground floor?
Yes, where they can be reached safely. Tell us about access when you get in touch so we can plan the job.
Which products 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.
Places near South Street
Also in South Street
Quotes for window mastic in South Street
Some jobs are bigger than they look, and some smaller. What affects the quote:
- Whether there’s mould to deal with
- The old material and how stubborn it is
- Any working-time requirements on site
- The number and length of the joints
Combining jobs into one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
Asking for a quote
You do not need to know the technical terms. It helps if you can tell us:
- What’s wrong with the joints now
- Pictures of the joints, sent by email
- If it’s domestic, commercial or a hotel
- The address or postcode of the job
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work and send you a clear quote.
Aftercare tips
To keep the joints looking good and working properly:
- Do not paint over the silicone
- Keep drainage slots and sill grooves clear
- Keep timber frames painted
- Look round the frames every year or so
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. Any of these is worth a call.
What happens on the day
At the end, we look at the finished work together and tell you how long to leave it. The visit itself usually takes most of a day for a typical house, less for a few frames, depending on the size of the job. For a village or hamlet like South Street, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- Where gaps are deep, backing rod goes in first.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Keep pets and children clear of the area while we work
- Mention any parking rules near the property
Getting a quote
For a quote, call 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before work begins.
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Window mastic in South Street: local notes
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 let a flat or house near Plumpton station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Managing a site like Chailey School? Then the mastic around its windows and doors needs looking after like any other building’s. For an older house near a landmark such as The Parish Church of St Peter, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
South Street is about 5 miles east of Burgess Hill, in East Sussex. If you need window mastic in South Street, please ring 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover East Sussex, South Street included. South Street is one of 289 towns and villages in East Sussex we cover for window mastic. We also work in Brighton, about 9 miles from South Street.
All of BN8 is covered for window mastic, from the main roads to the quietest streets. Whether your property is on Green Lane, Markstakes Corner and St James Walk or anywhere close by, our applicators can take on the job. We also cover the places around South Street: South Chailey (1 mile south), Chailey (1 mile north-east), North Chailey (2 miles north), Chiltington (2 miles south) and Plumpton Green (2 miles south-west). Within a short drive, we also cover Seaford (13 miles south-east), Lewes (5 miles south), Hailsham (13 miles south-east), Crowborough (11 miles north-east), Uckfield (5 miles east) and Newhaven (11 miles south).
Landmarks near South Street
We work in homes and buildings around The Five Bells Inn and Chailey St Peter's Church of England Primary School. For rail, the closest station is Plumpton station, about 2.2 miles south-west of the centre. Well-known places in the area include Princess Royal Hospital (4.3 miles north-west). Green spaces nearby include Blackcap and Malling Down.
DIY sealant or a professional job?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
What sealant work cannot fix
New sealant cannot fix everything, and we’d rather say so up front. It will not solve:
- Rotten timber, which needs a joiner first
- Faulty window hardware
- A failed sealed unit that has misted up
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Joints and surfaces we work on
- Composite doors
- Aluminium frames
- Timber windows & doors
- Patio & French doors
- uPVC windows
- Window sills
How the job changes by surface
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We can talk through the options.
Aluminium frames
Metal frames expand in the sun and are often slim, with little room for error. A tidy bead in anthracite grey, black or a matching colour suits the frame.