West Sussex · England
Window & door mastic in Steyning, West Sussex
Specialist window mastic for Steyning: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- A bead that does not match the frame
- Mastic that has split away from the wall
- Rushed sealant from a window installation
Window mastic in Steyning, done properly
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through. If the draught is through the window seals instead, we will tell you. If you’re dealing with a bead that doesn’t match the frame and old mastic that has gone black or come away, we can help.
Around Steyning, conservatories, garden rooms and patio doors are often part of the house. Their glazing joints and frame seals are as much a part of the job as the windows, and any older timber or sash windows need a sealant that suits them.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Steyning (BN44)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Common questions in Steyning
Can you do window mastic in Steyning?
Yes. We work across London and the South East, and Steyning is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing.
Can you help a landlord with a rental near Lancing station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Do you work on first-floor windows?
Yes, if safe access is possible. Higher or awkward frames may need extra access, and we will confirm what’s needed.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Do you seal inside as well as outside?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
How long will my window job take?
The work takes a morning for a couple of windows and a door. Access and how stubborn the old mastic is affect the time most.
Do you have sealant for grey or black windows?
Generally, yes. Tell us the frame colour when you get in touch and we will match it as closely as we can.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected.
Why act early in Steyning
If you are painting or rendering, reseal at the same time. Fresh joints finish the job neatly, and it’s easier while the walls are being worked on anyway. In an older home around Steyning, damp from a failed joint can get into timber and plaster, and that’s a much bigger job than renewing the sealant.
Leaving a failed joint usually makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
Why book with us
- You choose the colour before work begins
- Full insurance on every job
- Approved under the ARBOMaster scheme
- Quality sealants from Arbo and Everbuild
Take a look at what affects the cost and what customers say.
Steyning homes and the weather
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Lancing station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Steyning is about 4 miles north-west of Shoreham-by-Sea, in West Sussex. Across the BN44 area, we cover window mastic for homes and businesses. Our West Sussex coverage runs to 371 places, and Steyning is one of them. Our Brighton page covers work nearby, about 9 miles away.
Jobs for window mastic in BN44 works the same way as everywhere else we cover. Streets in the area include High Street, Market Field and Dog Lane. Other places close to Steyning include Bramber (1 mile east), Botolphs (1 mile south-east), Upper Beeding (1 mile east), Sompting (4 miles south) and Findon Valley (4 miles south-west). We also work in nearby towns such as Horsham (12 miles north), Worthing (5 miles south-west), Haywards Heath (13 miles north-east), Burgess Hill (10 miles north-east), Littlehampton (10 miles south-west) and Shoreham-by-Sea (4 miles south-east).
Local landmarks in Steyning
We work in homes and buildings around The Model Bakery The Norfolk Arms and Steyning Grammar School. The nearest railway station is Lancing station, about 4.1 miles south of the centre. A little further out are Steyning Museum (under half a mile north) and Southlands Hospital (4.4 miles south-east). For a walk, there’s Woods Mill and Chanctonbury Hill.
Surface by surface
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We will tell you if that’s what we find.
uPVC windows
We clean the frame edge carefully so the plastic isn’t marked, then the sealant goes in between frame and wall and tooled smooth.
Towns and villages near Steyning
More services for Steyning
What affects the quote in Steyning
The quote reflects the job in front of us. We take into account:
- Which sealant suits the joint
- How many areas need sealing
- How much old sealant there is and how hard it is to remove
- When we can work, for business premises
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You will have a clear quote before any work starts, so you know where you stand.
What to tell us for a quote
To make quoting easier, please include:
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
- Access, such as stairs, a lift or height
- What the problem is, such as mould, gaps, leaks or cracking
We quote each job on its own. Simply ring 0345 464 0079 or drop us an email and describe the job.
DIY versus a professional finish
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.
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Common problems we fix in Steyning
Sun, frost and rain wear sealant out. Sunlight dries the surface out, and over the years it loses its give, cracks and comes away.
Keep an eye out for any of the following:
- Cracked internal joints between frame and plaster
- Old mastic that has gone black or come away
- Draughts coming in around windows and doors
- Damp patches on the reveal after heavy rain
If you look after a building such as Steyning CofE Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Before you book anyone
- Are they insured?
- Whether they seal over old material or remove it
- Who turns up on the day
- What product goes in the joint
What we do, step by step
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes anything from an hour or two to a full day, depending on how many frames there are. Parking around Steyning is generally easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Mention any leaks or damp you’ve noticed
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
We do not publish a price list, because every job is different. Instead, we give you a clear quote for your job. To get started, call 0345 464 0079 or send us an email.
Advice
What sealant work cannot fix
We will always be straight with you, so here’s what sealant cannot fix:
- Worn gaskets, brush seals or a door that has dropped
- Penetrating damp from a failed cavity tray or render
- Soft or decayed wood in the frame
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer before you book.
Surfaces we seal
- Patio & French doors
- Window sills
- Aluminium frames
- Timber windows & doors
- uPVC windows
- Composite doors