West Sussex · England
Window & door mastic in Findon Valley, West Sussex
Window and door frames in Findon Valley need attention? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Damp patches on the reveal after heavy rain
- Cold air getting in at the frame edge
- Gaps where the sill meets the wall
How we handle window mastic in Findon Valley
Most frames have an outside joint and an inside one. Outside, the mastic keeps rain out; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. We’re often asked to deal with gaps where the sill meets the wall and damp patches on the reveal after heavy rain, on window sills, patio & French doors and timber windows & doors.
In a smaller place like Findon Valley, some walls face open ground and catch the full force of the weather. The mastic around frames on those walls tends to age faster.
The work is covered for a year after we finish. If anything is not right with it, phone 0345 464 0079 or drop us an email.
- Location
- Findon Valley (BN14, BN13)
- Wider area
- West Sussex
- Guarantee
- 12 months on all our work
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Findon Valley
I let a flat near West Worthing station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can be quoted together. Just phone 0345 464 0079 or email us with the address and what needs doing, and we will give you a clear quote.
Do you cover Findon Valley for window mastic?
Yes, Findon Valley is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and let us know what needs doing.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Are you ARBOMaster approved?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we’re part of it.
Do you guarantee window mastic?
Yes. Our 12-month guarantee covers every job.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll give you the cure time for the product we used before we leave.
Can new window sealant be painted?
Most silicone can’t be painted. Let us know beforehand, and we’ll use a paintable product where it suits.
Do you have insurance?
Yes. We are fully insured, with over 20 years’ experience in sealant work.
Leave it or put it right?
Resealing frames is a short job: the visit takes a few hours for a handful of frames, longer for a whole house. Leave it until water is coming in and you may need plastering and decorating as well. Homes in smaller places like Findon Valley can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
A few things move the cost up or down: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
Why book with us
- Sealant colour chosen to suit
- Sanitary silicone with an anti-fungal additive in wet areas
- Any old sealant cut out fully, not covered over
- You choose the colour before work begins
Read our cost guide and customer reviews.
When something else is needed
It helps to know what we cannot do too:
- Worn gaskets, brush seals or a door that has dropped
- A sash or casement that will not close properly
- Rotten timber, which needs a joiner first
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer.
Surfaces we seal
- uPVC windows
- Patio & French doors
- Timber windows & doors
- Window sills
- Composite doors
- Aluminium frames
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
If you’ve already had a go yourself, that is fine. We cut it out and start again.
Findon Valley homes and the weather
With historic houses such as Ecclesden Manor (about 3.5 miles south-west) nearby, there’s older building stock in the area around Findon Valley as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
In the older streets around All Saints, frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you look after a building such as Vale School, its window and door frames need their mastic kept sound, just like a home’s. Rented homes near West Worthing station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Findon Valley is about 2 miles north of Worthing, in West Sussex. If you need window mastic in Findon Valley, please phone 0345 464 0079 or email us for a quick quote. We are based in Crawley and cover West Sussex. 371 places in West Sussex are on our list, from the larger towns to small villages. There’s also a page for Brighton, about 12 miles away.
Work in BN14 and BN13 works the same way as everywhere else we cover. That includes homes and businesses on Mill Lane, Furze Road and Gorse Lane. Nearby, we also carry out window mastic in Salvington (1 mile south), Offington (1 mile south), Worthing (2 miles south), Broadwater (2 miles south-east) and Sompting (3 miles south-east). We also work in nearby towns such as Horsham (15 miles north), Bognor Regis (13 miles west), Burgess Hill (14 miles north-east), Littlehampton (6 miles south-west), Shoreham-by-Sea (6 miles east) and Lancing (4 miles south-east).
Landmarks near Findon Valley
Locally, jobs take us to homes and businesses close to Durrington High School. The closest station to Findon Valley is West Worthing station, about 2.4 miles south. Other landmarks nearby include Worthing Hospital (2.9 miles south-east) and Old Castle (1.9 miles south). Not far away are Widewater Lagoon and Steep Down.
Different surfaces, different methods
Patio & French doors
Patio and French doors have the longest joints on most houses. Most leaks start at the bottom corners, so we pay close attention there.
Timber windows & doors
Timber moves with moisture as well as heat, so the joint must stay flexible. The paint or stain needs to be sound where the sealant meets it.
How it works
At the end, we look at the finished work together and tell you how long to leave it. The work normally takes a few hours for a handful of frames, longer for a whole house, depending on the size of the job. For a job in Findon Valley, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check how each frame can be reached safely.
- 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
- Let us know about stairs, lifts or work at height
- Tell us if parking is tricky
- Plan for the work area to be out of bounds to pets and children
Get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Advice
For landlords and businesses
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Places near Findon Valley
Also in Findon Valley
Looking after it afterwards
Looking after new joints is easy:
- Ventilate rooms so frames do not stay wet inside
- Make sure the drainage slots aren’t blocked
- Keep paint and stain on wooden frames in good order
- Look round the frames every year or so
Most silicone sealants won’t take paint, so if you’re planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. Any of these is worth a call.