West Sussex · England
Window Mastic in West Thorney
Window mastic for West Thorney, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Draughts coming in around windows and doors
- Gaps left after new windows were fitted
- Hard, cracked sealant around windows
Window mastic in West Thorney
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We’re ARBOMaster approved and fully insured, and we give a one-year guarantee on the work. We work on patio & French doors, composite doors and timber windows & doors, and common reasons people get in touch are gaps between the frame and the inside reveal and gaps left after new windows were fitted.
Homes in small places like West Thorney 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.
Big or small, it’s backed by our 12-month guarantee in West Thorney and across West Sussex.
- Place
- West Thorney (PO10)
- Region
- West Sussex
- Guarantee
- One year on every job
- Quote
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Avoid blasting the frames with a pressure washer
- Air rooms to keep condensation down around windows
- Clean frames with a soft cloth and soapy water
- Keep drainage slots and sill grooves clear
Keep the new mastic undisturbed while it cures, following the cure time we give you. Keep jet washers away from the frames.
On timber windows, water behind the joint can lead to rot. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
When something else is needed
A few problems are outside what sealant work can do:
- Damp coming through the wall itself rather than the frame joint
- Broken hinges, locks or handles
- Draughts through the window seals rather than the frame
If in doubt, phone 0345 464 0079 or send us an email and we’ll say what we think before you book.
Where we work in West Thorney
- Patio & French doors
- Window sills
- uPVC windows
- Composite doors
- Aluminium frames
- Timber windows & doors
Places near West Thorney
More services for West Thorney
What affects the quote in West Thorney
Your quote is based on your job. We look at:
- Working hours on commercial sites
- The type of sealant required
- The old material and how stubborn it is
- The number of rooms or windows
Combining jobs into one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. We’ll give you a clear quote for the lot.
Helping us quote
Photos help, but a description is a good start. Try to tell us:
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
- The problem you’ve noticed
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved before giving you a price.
What we do, step by step
We bring everything the job needs with us, so you don’t need to buy or prepare anything. After a quick look at the joints together, the area is protected and the work begins. Most jobs take a few hours for a few frames, or a day or more for a whole house. Somewhere as small as West Thorney, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Let us know if you’ve seen damp or leaks
- Try not to wet indoor joints just before the visit
Getting a quote
For window mastic in West Thorney, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
Advice
What window mastic looks like in West Thorney
West Thorney is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around window and door frames, especially on the side facing the sea. 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.
Letting a property close to Southbourne station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Homes close to The Parish Church of St Nicholas include some older properties, and the joint between an old wall and a newer frame is usually the first place rain gets in.
West Thorney is about 5 miles south-east of Havant, in West Sussex. We provide window mastic to homeowners, landlords and businesses in West Thorney and the surrounding area. West Thorney is one of 371 towns and villages in West Sussex we cover. We also work in Portsmouth, around 7 miles away.
Every address in PO10 is covered for window mastic. Close by, we work in Thorney Island (1 mile north-west), Tye (2 miles west), Southbourne (2 miles north), North Hayling (2 miles west) and Northney (2 miles west). Larger places within reach include Bognor Regis (10 miles east), Chichester (6 miles east), Selsey (8 miles south-east), Emsworth (3 miles north-west), Portfield (7 miles east) and Yapton (13 miles east).
Near you in West Thorney
Around West Thorney, our work takes us to homes and buildings near Eames Farm and Bourne Community College, among other places. West Thorney’s nearest station is Southbourne station, roughly 2.2 miles north of the centre. Nearby you’ll also find Emsworth Museum (2.5 miles north-west) and Warblington Castle (3.1 miles north-west). For a walk, there’s Nutborne Marshes.
What we’re called out for in West Thorney
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
Most people get in touch when they notice something like this:
- Old mastic that has gone black or come away
- Gaps where the sill meets the wall
- Untidy mastic left by window fitters
- Cracked internal joints between frame and plaster
Managing a site like Thorney Island Community Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- Whether the sealant suits the joint
- What happens if they find a problem under the old sealant
- Are they insured?
- Whether you can choose the colour
Surface by surface
Window sills
Masonry sills can have joints where water gets in, and the joint under the frame can let rain run behind. We seal those with a sealant suited to masonry.
Composite doors
Front doors take the weather head on. We pay most attention there.
Questions from West Thorney
Will you come out to West Thorney?
Yes. West Thorney is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Southbourne station?
Yes, we work for landlords and agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before work begins.
Will resealing my frames help with draughts?
In many cases. Air often gets in between the frame and the wall, and sealing the inside and outside joints closes that path.
How long should I leave it?
Cure times vary by product and the temperature. We tell you how long to leave it before we go.
Can you do the inside joint as well?
Yes. Plenty of draughts come through the inside joint as well as the outside, so it can be worth sealing both.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Do I need to be at home?
It depends on the job. Inside work needs someone to give us access.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Landlords, agents and businesses in West Thorney
Landlords and letting agents in West Thorney can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.