West Sussex · England
Window Mastic in Slindon Common
Mastic around window and door frames, sills and patio doors in Slindon Common, with a one-year guarantee on every job. Ask us for a quote.
- Cracked sealant at the sill ends
- Mastic that is falling out in pieces
- Sealant in the wrong colour for the frame
Surface by surface
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so we use a flexible, low-modulus sealant. We match white, brown, anthracite grey and black frames.
Window sills
Stone and concrete sills have their own joints, including the one between the sill and the frame above. We seal those with a sealant suited to masonry.
Window mastic in Slindon Common, done properly
Around Slindon Common we seal all kinds of frames: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. We work on aluminium frames, uPVC windows and composite doors, and common reasons people get in touch are gaps left after new windows were fitted and hard, cracked sealant around windows.
Somewhere as small as Slindon Common, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
You get a one-year guarantee, the same in Slindon Common as everywhere else we work.
- Place
- Slindon Common (BN18)
- Wider area
- West Sussex
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How to look after the new joints
Good habits help new joints last longer. A few tips:
- Do not use solvent cleaners on the joint
- Do not aim a pressure washer at the joints
- Ventilate rooms so frames do not stay wet inside
- Repaint timber before it’s bare
Keep the new mastic undisturbed while it cures, following the cure time we give you. Keep jet washers away from the frames.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. If you notice one, it’s time to get the joint looked at.
Why deal with it now?
Once mastic fails, rain can get between the frame and the wall. Over time that can mean damp patches, damaged plaster and rotting timber. A reseal is a much smaller job. Older cottages and farmhouses around Slindon Common can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Call for a quick quote and we will go through it with you.
What you get with us
- ARBOMaster approved applicator
- We are fully insured
- Tidy, careful work
- Anti-fungal silicone where joints get wet
Take a look at our cost guide and customer reviews.
Slindon Common: your questions answered
Is Slindon Common in your area for window mastic?
Yes. Our work covers London and the South East, and Slindon Common is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will send you a clear quote.
Is Slindon Common within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What sealant do you use?
It depends on the joint: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
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.
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 hold any approvals?
Yes. We’re approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little.
Do you do commercial work?
Yes, regularly. We can plan bigger jobs in stages.
What we do, step by step
The work is kept neat and contained to the area we are working on. The job generally takes a morning for a couple of windows and a door. Somewhere like Slindon 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.
- 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.
Before we arrive
- Let us know about earlier repairs to the joints
- Tell us if parking is tricky
- Tell us about access, such as stairs, a lift or high-level joints
Getting a quote
Every job is quoted individually. Just phone 0345 464 0079 or drop us an email with the details, and pictures are welcome.
Advice
Quotes for window mastic in Slindon Common
For a quick quote, just ask. The main things that affect it are:
- How many areas need sealing
- The type of sealant required
- The amount of work
- How much old sealant there is and how hard it is to remove
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or email us.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- Roughly how big the job is
- The address or postcode of the job
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it’s a home or a business
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will talk you through the work before giving you a price.
Frames and glazing around Slindon Common
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Bignor Roman Villa (about 4.6 miles north) nearby, there’s older building stock in the area around Slindon Common as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you let a flat or house near Barnham station, renewing tired window mastic between tenants heads off draught and damp complaints. Homes close to The Parish Church of St Mary include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in.
Slindon Common is about 5 miles north-west of Littlehampton, in West Sussex. Jobs in Slindon Common get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Across West Sussex, we cover 371 places, and Slindon Common is one of them. We also work in Portsmouth, about 20 miles from Slindon Common.
Work in BN18 is quoted and booked the same way as anywhere else. Window mastic is available to properties on Sunnybox Lane, Bridle Lane and Shellbridge Road and the roads around them. If you’re just outside Slindon Common, we cover Slindon (1 mile north-west), Avisford (1 mile south-east), Binsted (1 mile south-east), Walberton (1 mile south) and Fontwell (1 mile west). We also work in nearby towns such as Worthing (10 miles east), Bognor Regis (6 miles south-west), Chichester (7 miles west), Selsey (11 miles south-west), Littlehampton (5 miles south-east) and Shoreham-by-Sea (15 miles east).
Landmarks near Slindon Common
Typical jobs here are in homes near The Spur Public House and St Philip Howard Catholic High School. The nearest railway station is Barnham station, roughly 2.1 miles south of the centre. A little further out are Arundel Castle (3 miles east) and Arundel and District Hospital (2.5 miles east). Open spaces near Slindon Common include Bignor Hill and WWT Arundel.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
When to call us in Slindon Common
Joints that are too thin or too deep fail early. A thin smear across a wide gap has nothing to it, and a gap filled solid cannot flex. That is what backing rod is for.
Most people get in touch when they notice one of these:
- White mastic on grey or black frames
- Cold air getting in at the frame edge
- Gaps left after new windows were fitted
- Gaps where the sill meets the wall
For site and facilities teams at buildings such as Slindon CofE Primary School, its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- Whether they’re fully insured
- What product goes in the joint
- How long the guarantee is
- When the joint can take water or movement