West Sussex · England
Window & door mastic in Shoreham-by-Sea, West Sussex
Window mastic for Shoreham-by-Sea, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Cold air getting in at the frame edge
- Black, perished sealant on frames
- Untidy mastic left by window fitters
Landlord and commercial work in Shoreham-by-Sea
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Window mastic in Shoreham-by-Sea
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We are fully insured ARBOMaster approved applicators, and we give a one-year guarantee on the work. We work on window sills, aluminium frames and patio & French doors, and people most often call us about cracked internal joints between frame and plaster and gaps where the sill meets the wall.
Walls in Shoreham-by-Sea that face the prevailing wind take the most weather, so the mastic there tends to fail first. Checking every frame, not just the obvious one, is time well spent.
A 12-month guarantee comes as standard.
- Place
- Shoreham-by-Sea (BN43, BN15, BN42)
- Wider area
- West Sussex
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Nearby places to Shoreham-by-Sea
Also in Shoreham-by-Sea
How the job changes by surface
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.
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A tidy bead in anthracite grey, black or a matching colour suits the frame.
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Use gentle cleaners on frames and sealant
- Ventilate rooms so frames don’t stay wet inside
- Keep paint and stain on wooden frames in good order
- Do not use solvent cleaners on the joint
Most silicone sealants won’t take paint, so if you’re planning to paint the frames or walls, tell us beforehand. We can use a paintable sealant where that matters.
Leaks normally show up in wet, windy weather, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Shoreham-by-Sea homes and the weather
Shoreham-by-Sea is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around window and door frames, especially on the side facing the sea. With historic houses such as Portslade Manor (about 2.3 miles east) nearby, there’s older building stock in the area around Shoreham-by-Sea 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.
For landlords with property near Shoreham-By-Sea station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Managing a site like Buckingham Park Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. For an older house near a landmark such as St Mary de Haura Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Shoreham-by-Sea is about 4 miles west of Brighton and Hove, in West Sussex. Anywhere in BN43, our applicators can take on window mastic. Across West Sussex, we cover 371 places, and Shoreham-by-Sea is one of them. We also work in Brighton, about 6 miles from Shoreham-by-Sea.
All of BN43, BN15 and BN42 is within our area for window mastic. Whether your property is on Adelaide Square, High Street and Rainbow Square or anywhere close by, our applicators can take on the job. With the A27 and A259 close by, Shoreham-by-Sea is simple for us to get to. Close by, we work in Old Shoreham (1 mile west), Kingston by Sea (1 mile east), Adur (1 mile north-west), Southwick (2 miles east) and Portslade (2 miles east). Larger places within reach include Worthing (6 miles west), Haywards Heath (14 miles north-east), Burgess Hill (10 miles north-east), Littlehampton (12 miles west), Rustington (11 miles west) and Storrington (10 miles north-west).
Local landmarks in Shoreham-by-Sea
In Shoreham-by-Sea, that means homes and buildings near Shoreham College, The Crabtree pub and Shoreham Academy. Shoreham-by-Sea has its own railway station: Shoreham-By-Sea station. Other landmarks nearby include Southlands Hospital (0.6 miles north-east). Open spaces near Shoreham-by-Sea include Thundersbarrow Hill and Shoreham Beach.
Shoreham-by-Sea: your questions answered
Do you work for landlords with property near Shoreham-By-Sea 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.
Do you cover Shoreham-by-Sea for window mastic?
Yes. We work across London and the South East, and Shoreham-by-Sea is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job.
How do I get a quote for window mastic in Shoreham-by-Sea?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we’ll talk you through it.
Can I paint over the new sealant?
Not usually, if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Will new mastic stop draughts?
It will if the frame joint is the problem. We find where the air is coming from before we reseal.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can you reach windows above the ground floor?
Yes, as long as they can be reached safely. Let us know about access when you ask for a quote so we can plan the job.
What do you need from me for a quote?
A short description and the location, with pictures by email if possible. We’ll ask anything else we need to know.
What we do, step by step
Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours for a handful of frames, longer for a whole house. For a job in Shoreham-by-Sea, we need access to where the work is and somewhere nearby to park. If the job is outside, mention gates, side access and anything above ground floor.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry.
- 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
- Try not to wet indoor joints just before the visit
- Tell us about any water getting in
- Plan for the work area to be out of bounds to pets and children
Get a quote
Getting a quote is simple: let us know what needs doing and where. Photos by email help us understand the job, and we will come back to you with a quote.
Related advice
When something else is needed
We won’t take on work that won’t last, so these are the limits:
- Rotten timber, which needs a joiner first
- Worn gaskets, brush seals or a door that has dropped
- Faulty window hardware
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before you book.
What we seal
- Patio & French doors
- Window sills
- Timber windows & doors
- Aluminium frames
- Composite doors
- uPVC windows
Quotes for window mastic in Shoreham-by-Sea
The price is agreed before any work begins. It takes into account:
- The size of the job
- Any working-time requirements on site
- Any mould that needs treating
- How easy the joints are to reach
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Asking for a quote
You do not need to know the technical terms. Just tell us:
- The problem you’ve noticed
- If someone has resealed it before
- The address or postcode of the job
- Access, such as stairs, a lift or height
For a quote, phone 0345 464 0079 or drop us an email with the location and a short description of the problem. You will have a clear quote before any work starts.
Why deal with it now?
A quick bead over the top of old mastic looks like an easy fix, but it won’t grip old, dirty sealant. It peels before long, and water still gets in behind. Proper resealing starts with removing the old joint. In Shoreham-by-Sea, as anywhere, most leaks start as a small gap in a joint, and they’re far easier to fix early.
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, phone 0345 464 0079 or email us for an honest opinion and a quote.
Why book with us
- You choose the colour before work begins
- Arbo and Everbuild products
- Domestic, commercial and hotel work
- We never seal over old sealant
Take a look at what affects the cost and customer reviews.