West Sussex · England
Window & door mastic in Fisher, West Sussex
We cover Fisher for mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly.
- Rushed sealant from a window installation
- Mastic that is falling out in pieces
- White mastic on grey or black frames
How the job changes by surface
Aluminium frames
Bi-fold and sliding aluminium doors have long frame joints, and the bottom joint sees the most water. We prepare and reseal every joint, backing the deep ones.
Timber windows & doors
Timber moves with moisture as well as heat, so a flexible sealant is essential. We seal onto sound, dry paintwork or timber.
Window mastic for homes and businesses in Fisher
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through and quietens the whistle on windy days. Where the air is getting in through the window itself, we will say so. We’re often asked to deal with sealant in the wrong colour for the frame and draughty joints inside around the window, across timber windows & doors, uPVC windows and patio & French doors.
Mastic can only go onto a dry, clean joint, so window work in Fisher is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
You are covered for a year from the day we finish. If anything is not right with it, call 0345 464 0079 or drop us an email.
- Where
- Fisher (PO20)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
When something else is needed
Sealant isn’t the answer to every problem, and we’d rather say so up front. It won’t solve:
- Damp problems in the wall away from the window
- Faulty window hardware
- Condensation trapped between the panes
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly.
Where we work in Fisher
- uPVC windows
- Timber windows & doors
- Aluminium frames
- Window sills
- Patio & French doors
- Composite doors
What affects the cost of window mastic
Every job gets its own quote. These are the things that affect it:
- Mould in or behind the old joints
- The number and length of the joints
- How many rooms, windows or areas are involved
- Working hours on commercial sites
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we will explain what it covers.
What we need to know
Before you ask for a quote, have a think about:
- What the problem is, such as mould, gaps, leaks or cracking
- Any previous sealing or DIY work
- How many joints, rooms or windows are involved
- How we’d reach the joints
We do not publish a price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To get started, phone 0345 464 0079 or send us an email.
Aftercare tips
After the cure time, these simple habits help:
- Do not paint over the silicone
- Repaint timber before it’s bare
- Avoid harsh chemicals near the mastic
- Check the mastic once a year
Most silicone sealants will not take paint, so mention any painting plans before work begins. There are paintable sealants for joints that need it.
A small gap around a frame only grows. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. A new joint closes it up.
Landlords, agents and businesses in Fisher
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll quote.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
What happens on the day
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. Most jobs then take a few hours for a few frames, or a day or more for a whole house. Somewhere like Fisher needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- Each frame is looked over and we agree which ones need resealing.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Let us know about parking restrictions
- Keep pets and children clear of the area while we work
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, ring 0345 464 0079 or send us an email.
Related advice
Towns and villages near Fisher
More services for Fisher
Fisher homes and the weather
Fisher is within about 2 miles of 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. Rainfall in the South East is lower than in much 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 Chichester High School For Girls, its window and door frames need their mastic kept sound, just like a home’s. For landlords with property near Chichester station, renewing tired window mastic between tenants heads off draught and damp complaints.
Fisher is about 3 miles south of Chichester, in West Sussex. Every kind of property in Fisher can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Across West Sussex, we cover 371 places, Fisher among them. For nearby work, see our Portsmouth page (14 miles or so).
Postcode districts we cover here for window mastic: PO20. Other places close to Fisher include South Mundham (1 mile east), Street End (1 mile south-west), Sidlesham Common (1 mile west), Sidlesham (2 miles south-west) and Nyetimber (2 miles south-east). We also work in nearby towns such as Bognor Regis (3 miles east), Chichester (3 miles north), Selsey (5 miles south), Littlehampton (10 miles east), Emsworth (9 miles north-west) and Rustington (11 miles east).
Around Fisher
The closest station to Fisher is Chichester station, roughly 2.5 miles north. Other landmarks nearby include Chichester Cathedral Treasury (2.7 miles north) and Chichester Castle (3 miles north).
Questions from Fisher
I let a flat near Chichester station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Is Fisher within the area you cover?
Yes. Fisher is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What does window mastic cost?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
Can you seal the gap between the frame and the plaster indoors?
Yes. Inside, the joint between frame and plaster is sealed neatly.
Which products do you use?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
What should I tell you?
Tell us what needs doing and where, plus photos if you have them. If we need more, we’ll ask.
When to call us in Fisher
Water runs down the glass onto the sill, so the sill ends and the joint below the frame are common leak points. Failed sealant there lets rain into the wall or behind the frame.
Most people get in touch after spotting one of these:
- Sealant in the wrong colour for the frame
- Cold air getting in at the frame edge
- Mastic that has split away from the wall
- Black, perished sealant on frames
If you live in an older home near St Leodegar's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What to look for in a quote
- How the joint is cleaned and prepared
- How long to leave it before use
- Whether VAT is included
- What insurance they hold