West Sussex · England
Window Mastic in Cocking
Our applicators work in Cocking on mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Rushed sealant from a window installation
- Water coming in at the bottom corners of a door
- Mastic that is falling out in pieces
Window mastic for homes and businesses in Cocking
Homes in Cocking have every kind of window: uPVC, aluminium, timber and composite, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. If you’re dealing with rain getting in at the frame or under the sill and draughts coming in around windows and doors, we can put it right, whatever the surface.
Mastic can only go onto a dry, clean joint, so window work in Cocking is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
All our work comes with a one-year guarantee.
- Place
- Cocking (GU29)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What sealant work can’t fix
We will not take on work that will not last, so these are the limits:
- Rotten timber, which needs a joiner first
- Draughts through the window seals rather than the frame
- Penetrating damp from a failed cavity tray or render
If you are not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer before you book.
What we seal
- Patio & French doors
- Composite doors
- Window sills
- Timber windows & doors
- uPVC windows
- Aluminium frames
Do you need window mastic in Cocking?
Every frame moves through the day. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. A sealant that can’t keep up eventually tears.
These are the problems we are asked about most:
- Cold air getting in at the frame edge
- A bead that does not match the frame
- Gaps left after new windows were fitted
- Draughty joints inside around the window
For an older house near a landmark such as St Catherine of Siena Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Comparing quotes
- Whether they’re fully insured
- How much experience the applicator has
- When the joint can take water or movement
- The length of the guarantee
Why deal with it now?
Choosing the product is half the job. Interior caulk and bathroom silicone are not made for exterior frame joints. An exterior, low-modulus sealant stays flexible in sun and frost. In a small place like Cocking, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part.
Why us?
- Anti-fungal sanitary silicone in wet areas
- Trusted Arbo and Everbuild sealants
- Colour picked to suit the job
- White, clear, grey or another colour, product permitting
More services for Cocking
For landlords and businesses
If you manage several properties in or around Cocking, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and photos by email help.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Do not use solvent cleaners on the joint
- Make sure the drainage slots aren’t blocked
- Don’t aim a pressure washer at the joints
- Use gentle cleaners on frames and sealant
On timber frames, keep the paintwork in good order, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Early resealing stops it reaching that point.
How we quote for window mastic
You’ll get a clear quote before work begins. It takes into account:
- Any mould that needs treating
- The product the joint needs
- The old material and how stubborn it is
- Whether the work is at height
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Helping us quote
To make quoting easier, please include:
- The problem you’ve noticed
- Whether it has been sealed before
- If it’s domestic, commercial or a hotel
- Access, such as stairs, a lift or height
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Common questions in Cocking
Do you cover smaller places like Cocking?
Yes. Cocking is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Cocking in your area for window mastic?
Yes. Our work covers London and the South East, and Cocking is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
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.
Do you have insurance?
Yes, we are fully insured for domestic and commercial work.
Do I need to be at home?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Does the work come with a guarantee?
Yes. Each job is covered for 12 months.
Will it make a mess?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we’re done.
What information do you need?
The location, the problem and the rough size of the job. If you can, email a few photos.
What window mastic looks like in Cocking
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Historic houses like Cowdray House (about 2.6 miles north) are a reminder that the area around Cocking has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
In and around Cocking, as anywhere, good window mastic starts with a clean, dry, properly prepared joint.
Cocking is about 8 miles north of Chichester, in West Sussex. For window mastic in and around Cocking, please phone 0345 464 0079 or email us for a quick quote. We’re based in Crawley and cover West Sussex. Our West Sussex coverage runs to 371 places, and Cocking is one of them. There’s also a page for Portsmouth, roughly 17 miles from Cocking.
Jobs for window mastic in GU29 works the same way as everywhere else we cover. Window mastic is available to properties on Bell Lane, The Croft and Cherry Close and the roads around them. We also cover the places around Cocking: Bepton (1 mile north-west), Heyshott Green (1 mile north-east), Cocking Causeway (1 mile north), Heyshott (1 mile east) and Bepton Common (2 miles north). Within a short drive, we also cover Bognor Regis (12 miles south), Chichester (8 miles south), Selsey (15 miles south), Littlehampton (14 miles south-east), Emsworth (11 miles south-west) and Rustington (14 miles south-east).
Local landmarks in Cocking
Other landmarks nearby include Midhurst Community Hospital (3 miles north) and Midhurst Museum (2.5 miles north). Open spaces near Cocking include Levin Down and Iping and Stedham Commons.
What happens on the day
All our tools and materials come with us in the van, so you do not need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours for a handful of frames, longer for a whole house. Somewhere as small as Cocking, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away, along with any loose debris.
- 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.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Let us know about earlier repairs to the joints
- Plan for the work area to be out of bounds to pets and children
Getting a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, call 0345 464 0079 or send us an email.