West Sussex · England
Lancing Window Mastic
Mastic around window and door frames, sills and patio doors in Lancing, with a one-year guarantee on every job. Call for a quick quote.
- Sealant in the wrong colour for the frame
- Cracked sealant at the sill ends
- Cold air getting in at the frame edge
Windows and doors in Lancing
Lancing 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. With historic houses such as Portslade Manor (about 4.6 miles east) nearby, there’s older building stock in the area around Lancing 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 an older house near a landmark such as St. Michael & All Angels, frames set in older brick or stone need a sealant that suits the wall as well as the frame. For landlords with property near Lancing station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Lancing is about 3 miles east of Worthing, in West Sussex. For window mastic in and around Lancing, please ring 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover West Sussex, Lancing included. Lancing is one of 371 towns and villages in West Sussex we cover for window mastic. We also work in Brighton, about 8 miles from Lancing.
We cover every part of the BN15 postcode area for window mastic. Streets in the area include North Road, North Farm Road and Addison Close, all of which we cover. Lancing is on the A2025, which makes it straightforward to reach. If you are just outside Lancing, we cover Sompting (1 mile west), East Worthing (2 miles south-west), Broadwater (2 miles west), Offington (3 miles west) and Botolphs (3 miles north). We also work in nearby towns such as Worthing (3 miles west), Haywards Heath (15 miles north-east), Burgess Hill (12 miles north-east), Littlehampton (9 miles west), Rustington (8 miles west) and Storrington (8 miles north-west).
What’s near Lancing
In Lancing, that means homes and buildings near Brooklands Park, Sompting Abbotts Preparatory School and The Railway pub and the streets around them. Lancing has its own railway station: Lancing station. Other landmarks nearby include Worthing Hospital (2 miles south-west) and Old Castle (3.1 miles west). Green spaces nearby include Lancing Ring and Widewater Lagoon.
About our window mastic in Lancing
There are two joints on most windows. Outside, the mastic keeps rain out; the internal joint closes the gap to the plaster and stops draughts. We seal one or both, depending on what’s needed. Typical jobs include hard, cracked sealant around windows and damp patches on the reveal after heavy rain, across uPVC windows, patio & French doors and window sills.
Many houses in smaller places like Lancing have conservatories, garden rooms or patio doors. Their glazing joints and frame seals are as much a part of the job as the windows.
We stand behind the work with a one-year guarantee.
- Location
- Lancing (BN15)
- Wider area
- West Sussex
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Lancing
Does the coastal weather in Lancing affect outside sealant?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Can you help a landlord with a rental near Lancing station?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear quote.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done.
How do I get a quote for window mastic in Lancing?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or drop us an email and tell us what needs doing and where.
Can you seal the gap between the frame and the plaster indoors?
Yes, we do both. Inside, the joint between frame and plaster is sealed neatly.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Are you insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
What sealant do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. We use products from Arbo and Everbuild.
Also near Lancing
Other services in Lancing
What we do, step by step
All our tools and materials come with us in the van. After a quick look at the joints together, the area is protected and the work begins. Most jobs take most of a day for a typical house, less for a few frames. Parking around Lancing is normally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We start by checking each window and door with you.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- For business premises, tell us about site rules or sign-in
- Let us know about earlier repairs to the joints
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we will explain how we’d tackle it. When it suits you, ring 0345 464 0079 or email us.
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Landlords, agents and businesses in Lancing
Hotels need rooms back in use, so we plan the work room by room. We have worked in hotels as well as homes and businesses.
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.
Surface by surface
Patio & French doors
The joints around patio doors run a long way, top, sides and threshold. The threshold and the bottom corners take the most water, so we pay close attention there.
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 keeps the clean look.
Do you need window mastic in Lancing?
Older frames were often sealed with products that set hard. Once it has hardened, the frame’s movement tears it from the wall, leaving a hairline gap down one side.
Keep an eye out for these signs:
- Gaps where the sill meets the wall
- Cold air getting in at the frame edge
- Hard, cracked sealant around windows
- A bead that does not match the frame
If you look after a building such as The Globe Primary Academy, its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- The length of the guarantee
- Which colour the sealant will be
- What product goes in the joint
- Who does the work, and how experienced they are
Quotes for window mastic in Lancing
We do not publish a price list, because no two jobs are the same. The quote depends on:
- How many areas need sealing
- The size of the job
- The type of sealant required
- Whether the work is at height
Every job is a little different, 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.
Helping us quote
Before you ask for a quote, have a think about:
- If it’s domestic, commercial or a hotel
- Where the job is, and your postcode
- How we’d reach the joints
- If someone has resealed it before
Call for a quick quote, or email us if that is easier. Describe what needs sealing and we will explain what’s involved and send you a clear quote.
DIY sealant or a professional job?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Why it’s worth doing now in Lancing
A quick bead over the top of old mastic looks like an easy fix, but new sealant can’t bond to old, crumbling mastic. It soon lifts and the leak carries on behind it. The old mastic has to come out. In a smaller place like Lancing, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Lancing
- You choose the colour before work begins
- Full insurance on every job
- 180+ five-star Google reviews
- Experience in homes, commercial sites and hotels
Take a look at how sealant jobs are priced and what customers say.