Essex · England
Cock Street Window Mastic
Mastic around window and door frames, sills and patio doors for Cock Street, backed by a one-year guarantee. Ask us for a quote.
- Old mastic that has gone black or come away
- Draughty joints inside around the window
- A bead that doesn’t match the frame
Honest limits
To be straight with you, there are a few things sealant won’t fix:
- A sash or casement that won’t close properly
- A frame that has rotted at the joint
- Misting between the panes of a double-glazed unit (that needs a new unit)
If you’re not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before booking.
Where we work in Cock Street
- Aluminium frames
- Patio & French doors
- uPVC windows
- Timber windows & doors
- Window sills
- Composite doors
Window mastic in Cock Street
The mastic around a window or door seals the gap between the frame and the wall. Once that seal fails, wind and rain find the gap. The old mastic is removed and the joint resealed with a flexible exterior sealant. We are often asked to deal with black, perished sealant on frames and whistling draughts around closed windows, across window sills, composite doors and timber windows & doors.
Outdoor sealant needs dry, clean surfaces, so work on frames around Cock Street is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
The work is covered for a year after we finish. If anything isn’t right with it, ring 0345 464 0079 or email us.
- Location
- Cock Street (CO6)
- Wider area
- Essex
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Surface by surface
Patio & French doors
Heavy door frames can move more than windows. The sealant must cope with it without cracking.
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so the joint needs a low-modulus sealant that stays flexible. We match white, brown, anthracite grey and black frames.
Cock Street homes and the weather
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Rented homes near Bures station change hands often, and renewing tired window mastic between tenants heads off draught and damp complaints.
Cock Street is in Essex. For window mastic in and around Cock Street, please call 0345 464 0079 or email us for a quick quote. We’re based in Crawley and cover Essex. 644 places in Essex are on our list, from the larger towns to small villages. We also work in Chelmsford, about 24 miles from Cock Street.
Work in CO6 works the same way as everywhere else we cover. Close by, we work in Leavenheath (1 mile west), Stoke-by-Nayland (1 mile east), Nayland (1 mile south-east), Wissington (2 miles south) and Little Horkesley (3 miles south). We also work in nearby towns such as Colchester (7 miles south), Braintree (15 miles south-west), Camulodunum (7 miles south), Halstead (10 miles west), Greenstead (8 miles south-east) and Tiptree (13 miles south).
What’s near Cock Street
Around Cock Street, our work takes us to homes and buildings near Lion pub, among other places. The nearest railway station is Bures station, roughly 4 miles west of the centre. Well-known places in the area include Mount Bures (4.3 miles south-west) and Severalls Hospital (5.3 miles south). Not far away are Arger Fen.
What happens on the day
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours for a few frames, or a day or more for a whole house. Somewhere like Cock Street 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.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
Before we arrive
- Move anything stored near the joints
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
Get a quote
For a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
Advice
Keeping the joints in good condition
So the new joints stay in good condition:
- Air rooms to keep condensation down around windows
- Use gentle cleaners on frames and sealant
- Do not paint over the silicone
- Check the mastic once a year
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak, and if anything looks wrong, just phone 0345 464 0079 or email us.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
Why it’s worth doing now in Cock Street
Redecorating is a good moment to renew the mastic. A clean new bead makes new paint or render look finished. In a small place like Cock Street, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
The cost reflects the work involved, not guesswork. That is why we ask about the job first.
Why Cock Street clients choose us
- More than 20 years in sealant work
- Neat joints and a tidy finish
- Colour picked to suit the job
- An ARBOMaster approved applicator
See our cost guide and what customers say.
Quotes for window mastic in Cock Street
Jobs vary more than people expect. The main factors:
- How easy the joints are to reach
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
- How many areas need sealing
Doing several joints on one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. We’ll send you a clear quote for the lot.
What we need to know
When you contact us, these details help:
- How many joints, rooms or windows are involved
- The type of property
- Where the property is
- Access, such as stairs, a lift or height
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job.
Also near Cock Street
Other services in Cock Street
What we are called out for in Cock Street
Sills take more water than any other part of a window, 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.
Look out for any of the following:
- Draughty joints inside around the window
- Mastic that is falling out in pieces
- Rushed sealant from a window installation
- Mastic that has split away from the wall
If you live in an older home near St Matthew's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Questions to ask before booking
- How the colour is chosen
- What happens if they find a problem under the old sealant
- Who does the work, and how experienced they are
- How the joint is cleaned and prepared
Cock Street questions
Can you do window mastic in Cock Street?
Yes. We work across London and the South East, and Cock Street is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Will you come out to Cock Street?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Which products 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.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access, while outside work can sometimes be arranged differently.
Does the work come with a guarantee?
Yes, for 12 months. A yearly look at the joints helps them last.
Will it make a mess?
Not at all. We work neatly, protect the area around the joints and tidy up afterwards.
Is it worth trying it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Where are you based?
Our base is Crawley. We work across South East England, London and Scotland.