West Sussex · England
Window Mastic in Fittleworth
Problem with your window and door frames in Fittleworth? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Rain getting in at the frame or under the sill
- Hard, cracked sealant around windows
- Draughts coming in around windows and doors
How the job changes by surface
uPVC windows
The frame is cleaned with a product that won’t harm the plastic, then the new bead is laid against the frame and the wall.
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the threshold joint takes a lot of water. Each is cleaned, backed where deep and resealed.
How we handle window mastic in Fittleworth
Behind a thin line of old mastic there’s sometimes a deep void. Packing it solid with sealant gives a joint that cannot flex, so we fit backing rod to set the right depth. That way the new bead bonds to the frame and the wall only. We are often asked to deal with whistling draughts around closed windows and gaps left after new windows were fitted, across patio & French doors, composite doors and aluminium frames.
Around Fittleworth, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
All of our work is guaranteed for twelve months, in Fittleworth and everywhere else we cover.
- Location
- Fittleworth (RH20)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Towns and villages near Fittleworth
Also in Fittleworth
Why deal with it now?
Getting a straight, even bead on an outside frame takes practice, especially upstairs. We cut out properly, back deep gaps and tool every joint neatly, using a product chosen for the frame and wall. Around Fittleworth, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first and give you a clear price before any work starts.
Why Fittleworth customers choose us
- Colour agreed with you before we start
- An ARBOMaster approved applicator
- Over 20 years’ experience
- We never seal over old sealant
See our cost guide and customer reviews.
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Window mastic in Fittleworth: local notes
The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Old Place Manor (about 2.1 miles east) are a reminder that the area around Fittleworth has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Homes close to The Parish Church of St Mary include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Managing a site like Fittleworth CofE Village School? Then its window and door frames need their mastic kept sound, just like a home’s.
Fittleworth is about 11 miles north of Littlehampton, in West Sussex. From the centre of Fittleworth to the outskirts, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. We cover 371 towns and villages across West Sussex, large and small. We also work in Crawley, about 19 miles from Fittleworth.
All of RH20 is within our area for window mastic, from the main roads to the quietest streets. Streets in the area include Fairmead Close, School Lane and Greatpin Croft. Nearby, we also carry out window mastic in Bedham (1 mile north), Lower Horncroft (1 mile south), Coates (1 mile south-west), Hardham (2 miles south-east) and Coldwaltham (2 miles south-east). We also work in nearby towns such as Horsham (13 miles north-east), Worthing (12 miles south-east), Bognor Regis (13 miles south-west), Chichester (13 miles south-west), Littlehampton (11 miles south) and Shoreham-by-Sea (15 miles south-east).
What’s near Fittleworth
Around Fittleworth, our work takes us to homes and buildings near The Swan Hotel. Fittleworth’s nearest station is Pulborough station, roughly 1.9 miles east. Nearby you’ll also find Coates Castle (1.5 miles south-west) and Coultershaw Heritage Site (2.5 miles west). Not far away are Bignor Hill and The Mens.
What sealant work cannot fix
Sealant is not the answer to every problem, and we’ll tell you before we start. It won’t solve:
- A failed sealed unit that has misted up
- Broken hinges, locks or handles
- Rotten timber, which needs a joiner first
If in doubt, phone 0345 464 0079 or drop us an email and we’ll say what we think before you book.
Joints and surfaces we work on
- uPVC windows
- Window sills
- Composite doors
- Aluminium frames
- Patio & French doors
- Timber windows & doors
Your questions about window mastic in Fittleworth
Is Fittleworth in your area for window mastic?
Yes. We work across London and the South East, and Fittleworth is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Is Fittleworth within the area you cover?
Yes, Fittleworth is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Will new mastic stop draughts?
In many cases. The gap between frame and wall is a common source of draughts, and resealing inside and out closes it.
Are you fully insured?
Yes. Mr Mastic is fully insured.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. It all has to come out first.
When is the sealant fully cured?
Cure times vary by product and the conditions. Before we leave, we’ll tell you the cure time.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
We also work for property managers and facilities teams. We can quote a run of properties together.
The process
Once we’re on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a morning for a couple of windows and a door. Somewhere as small as Fittleworth, 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.
- Finally we tidy up and check each joint.
Before we arrive
- Keep pets and children clear of the area while we work
- Tell us about any water getting in
- For business premises, tell us about site rules or sign-in
Getting a quote
Want a quote for window mastic? Please call 0345 464 0079 or email us and tell us about the job. We will explain what we’d do and send you a clear quote before any work starts.
Related advice
What we are called out for in Fittleworth
On timber frames, paint and putty build up around the joint. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
Any of these means the joints need attention:
- Sealant in the wrong colour for the frame
- Mastic that has split away from the wall
- Leaking joints at the ends of sills
- Untidy mastic left by window fitters
If you let a flat or house near Pulborough station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Before you book anyone
- How the joint is cleaned and prepared
- When the joint can take water or movement
- How long the guarantee is
- Are they insured?