West Sussex · England
Window & door mastic in Sullington, West Sussex
Professional window mastic in and around Sullington, with every bit of old sealant taken out first.
- Leaking joints at the ends of sills
- White mastic on grey or black frames
- Rain getting in at the frame or under the sill
How we handle window mastic in Sullington
Frames and walls do not move together. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. We work on aluminium frames, patio & French doors and composite doors, and common reasons people get in touch are cracked or shrunken mastic around the frame and whistling draughts around closed windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Sullington is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
You get a 12-month guarantee, the same in Sullington as everywhere else we work.
- Location
- Sullington (RH20)
- Wider area
- West Sussex
- Cover
- One year on every job
- Quotes
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Why deal with it now?
A quick bead over the top of old mastic looks like an easy fix, 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. Around Sullington, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
What you pay reflects the work, not guesswork. That is why we ask a few questions first.
Why Sullington clients choose us
- ARBOMaster approved applicator
- Quality sealants from Arbo and Everbuild
- 20+ years of sealant experience
- White, clear, grey or another colour, product permitting
Read what affects the cost or our reviews.
Frames and glazing around Sullington
Historic houses like Parham House (about 2.5 miles west) are a reminder that the area around Sullington has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is 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.
Rented homes near Amberley station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints. Managing a site like Thakeham Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Sullington is about 6 miles north of Worthing, in West Sussex. From the centre of Sullington to the outskirts, we cover window mastic for every kind of property. Our West Sussex coverage runs to 371 places, and Sullington is one of them. Our Brighton page covers work nearby.
We work across RH20 for window mastic. If you’re just outside Sullington, we cover Storrington (1 mile north-west), Heath Common (1 mile north-east), Washington (1 mile east), Rock (1 mile east) and Cootham (2 miles north-west). Further out, we also cover Horsham (12 miles north-east), Worthing (6 miles south), Bognor Regis (14 miles south-west), Burgess Hill (14 miles east), Littlehampton (8 miles south-west) and Shoreham-by-Sea (9 miles south-east).
Around Sullington
Around Sullington, our work takes us to homes and buildings near The Anchor Inn and Rydon Community College, among other places. The nearest railway station is Amberley station, roughly 4.7 miles west of the centre. Other landmarks nearby include The Storrington And District Museum (0.7 miles north-west) and Amberley Castle (4.5 miles west). Open spaces near Sullington include Amberley Wildbrooks RSPB Reserve and Chanctonbury Hill.
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Quotes for window mastic in Sullington
For a quick quote, just ask. The main things that affect it are:
- When we can work, for business premises
- Whether old sealant or filler has to be cut out
- The size of the job
- Which sealant suits the joint
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
What to tell us for a quote
When you contact us, these details help:
- The address or postcode of the job
- Any access issues, like height or stairs
- The rough size of the job
- Whether it has been sealed before
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To get started, call 0345 464 0079 or email us.
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can be quoted together.
What we’re called out for in Sullington
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, leaving a hairline gap down one side.
These are the problems we are asked about most:
- Cold air getting in at the frame edge
- Leaking joints at the ends of sills
- Rain getting in at the frame or under the sill
- Draughty joints inside around the window
In the older streets around The Parish Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Before booking anyone
- Which sealant they’ll use, and why
- When the joint can take water or movement
- How the colour is chosen
- Are they insured?
What we do, step by step
We work through the job in order: protect, prepare, seal, tidy. For most jobs that takes anything from an hour or two to a full day, depending on how many frames there are. Somewhere like Sullington 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.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Before we arrive
- For business premises, tell us about site rules or sign-in
- Let us know if you’ve seen damp or leaks
- Tell us if parking is tricky
Getting a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you are ready, call 0345 464 0079 or drop us an email.
Advice
Sullington questions
Do you cover smaller places like Sullington?
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.
Do you work for landlords with property near Amberley station?
Yes. We work for landlords and agents as well as homeowners. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
When is the sealant fully cured?
Different products cure at different speeds, so follow the cure time we give you when we finish.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We’ll tell you what we are using and why.
How long does it take to reseal the windows on a house?
The work takes anything from an hour or two to a full day, depending on how many frames there are. Access and how stubborn the old mastic is affect the time most.
Do the sealants smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
Will you leave a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Nearby places to Sullington
More services for Sullington
Looking after it afterwards
To keep the joints looking good and working properly:
- Keep solvents and bleach off the sealant
- Avoid blasting the frames with a pressure washer
- Keep timber frames painted
- Don’t paint over the silicone
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak, and if anything looks wrong, just call 0345 464 0079 or drop us an email.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.