West Sussex · England
Window & door mastic in Lower Horncroft, West Sussex
Problem with your window and door frames in Lower Horncroft? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Gaps left after new windows were fitted
- White mastic on grey or black frames
- Whistling draughts around closed windows
How we handle window mastic in Lower Horncroft
Homes in Lower Horncroft have every kind of window: uPVC, aluminium, timber and composite, along with patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. If you have gaps between the frame and the inside reveal and cracked or shrunken mastic around the frame, we can help.
Homes in small places like Lower Horncroft often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
Every job is covered by our 12-month guarantee, wherever you are in West Sussex.
- Where
- Lower Horncroft (RH20)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How it works
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes a few hours for a few frames, or a day or more for a whole house. In a small place like Lower Horncroft, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Finally we tidy up and check each joint.
How to prepare
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
- Tell us if parking is tricky
Getting a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email photos if that is easy.
Advice
Also near Lower Horncroft
Also in Lower Horncroft
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance.
For anyone letting property in or around Lower Horncroft, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
Can I do it myself?
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.
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.
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Avoid blasting the frames with a pressure washer
- Look round the frames every year or so
- Don’t paint over the silicone
- Do not use solvent cleaners on the joint
On timber frames, keep the paintwork in good order, because bare, wet timber moves more and pulls at the joint. Paint up to the joint, not over the silicone.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. A new joint closes it up.
How we quote for window mastic
Every job gets its own quote. This is what makes a difference:
- The size of the job
- How many areas need sealing
- Any working-time requirements on site
- Mould in or behind the old joints
We do not show prices on the website, because the cost depends so much on the job itself. Call for a quick quote.
What to tell us for a quote
Before you ask for a quote, have a think about:
- How many joints, rooms or windows are involved
- If someone has resealed it before
- A few photos by email, if you can
- How we’d reach the joints
We don’t publish a price list. Instead, your job gets its own clear quote. To arrange one, ring 0345 464 0079 or send us an email.
Window mastic in Lower Horncroft: local notes
With historic houses such as Bignor Roman Villa (about 2.2 miles south-west) nearby, there’s older building stock in the area around Lower Horncroft as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as Fittleworth CofE Village School, the mastic around its windows and doors needs looking after like any other building’s. For landlords with property near Pulborough station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. Homes close to Church of St Agatha include some older properties, and the joint between an old wall and a newer frame is generally the first place rain gets in.
Lower Horncroft is about 10 miles north of Littlehampton, in West Sussex. From the centre of Lower Horncroft to the outskirts, window mastic is available for homes and businesses alike. 371 places in West Sussex are on our list, from the larger towns to small villages. There’s also a page for Crawley, about 20 miles away.
We work across the RH20 postcode area for window mastic and the streets around it. Neighbouring places we cover for window mastic include Coates (1 mile west), Fittleworth (1 mile north), Watersfield (1 mile south), Coldwaltham (1 mile south-east) and Bedham (1 mile north). Further out, we also cover Horsham (13 miles north-east), Worthing (11 miles south-east), Bognor Regis (12 miles south-west), Chichester (12 miles south-west), Littlehampton (10 miles south) and Shoreham-by-Sea (15 miles south-east).
What’s near Lower Horncroft
Locally, jobs take us to homes and businesses close to The Swan Hotel and Lodge Hill Residential Centre. The nearest railway station is Pulborough station, roughly 2.3 miles east of the centre. A little further out are Coates Castle (0.9 miles west) and Coultershaw Heritage Site (2.4 miles north-west). For a walk, there’s Amberley Wildbrooks RSPB Reserve and Bignor Hill.
Leave it or put it right?
The work is quick compared with the damage it prevents: it takes a few hours for a few frames, or a day or more for a whole house. Leave it until water is coming in and you may need plastering and decorating as well. Where a wall is exposed, as many are in small places like Lower Horncroft, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first.
Why book with us
- We leave the area clean and tidy
- A choice of colours where the product allows
- Rated 4.9 stars on Google
- We are fully insured
Read what affects the cost and what customers say.
Surface by surface
Patio & French doors
Door frames take knocks and movement every time the doors are used. The sealant must cope with it.
uPVC windows
We clean the frame edge carefully so the plastic is not marked, then the new bead is laid against the frame and the wall and tooled smooth.
Lower Horncroft questions
Can you do window mastic in Lower Horncroft?
Yes, Lower Horncroft is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we will send you a clear quote.
Do you work for landlords with property near Pulborough station?
Yes. We work for landlords and agents as well as homeowners. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
What does window mastic cost?
Size, access and the old material all affect the cost. Call for a quick quote.
Will there be a smell?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
Can you do upstairs windows?
Normally, yes. Access is planned before we start, so mention the height and anything in the way.
Can you work on commercial sites?
Yes. We can plan bigger jobs in stages.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We’ll tell you what we are using and why.
When is the sealant fully cured?
Different products cure at different speeds, so please follow the time we give you when we finish.