Windsor and Maidenhead · England
Window & door mastic in Cox Green, Windsor and Maidenhead
Window mastic for Cox Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Leaking joints at the ends of sills
- Draughty joints inside around the window
- Water coming in at the bottom corners of a door
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Air rooms to keep condensation down around windows
- Don’t use solvent cleaners on the joint
- Use gentle cleaners on frames and sealant
- Avoid blasting the frames with a pressure washer
Clean the frames with mild soapy water, and avoid solvent cleaners on the sealant.
Leaks normally show up in wet, windy weather, but sealant goes on best when frames and walls are dry. Sorting cracked mastic early means the joint is sound before the bad weather.
About our window mastic in Cox Green
Mr Mastic’s applicators have more than 20 years’ experience with window and door sealants. We are fully insured ARBOMaster approved applicators, and every job is covered by a 12-month guarantee. If you are dealing with hard, cracked sealant around windows and gaps between the frame and the inside reveal, we can put it right.
Around Cox Green, conservatories, garden rooms and patio doors are often part of the house. Their glazing joints and frame seals are as much a part of the job as the windows.
You’re covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or drop us an email.
- Location
- Cox Green (SL6)
- Region
- Windsor and Maidenhead
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
DIY sealant or a professional job?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
What affects the quote in Cox Green
Every job gets its own quote. These are the things that affect it:
- How many areas need sealing
- Whether there’s mould to deal with
- The type of sealant required
- When we can work, for business premises
The cost depends on how much there is to do, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Helping us quote
Photos by email are helpful but not essential. Try to tell us:
- How many joints, rooms or windows are involved
- What the problem is, such as mould, gaps, leaks or cracking
- The address or postcode of the job
- If it’s domestic, commercial or a hotel
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved before giving you a price.
Leave it or put it right?
Resealing frames is a short job: it takes most of a day for a typical house, less for a few frames. Leave it until water is coming in and you may need plastering and decorating as well. Around Cox Green, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, phone 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in Cox Green
- White, clear, grey or another colour, product permitting
- We’re fully insured
- 4.9 on Google from 180+ five-star reviews
- A 12-month guarantee on all work
Take a look at what affects the cost and customer reviews.
Window mastic in Cox Green: local notes
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. With historic houses such as Dorney Court (about 3.2 miles east) nearby, there’s older building stock in the area around Cox Green as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
If you let a flat or house near Maidenhead station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Managing a site like Wessex Primary School? Then the mastic around its windows and doors needs looking after like any other building’s. In the older streets around All Saints' Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
Cox Green is about 1 mile south-west of Maidenhead, in Windsor and Maidenhead. Whether you are in the middle of Cox Green or further out, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Cox Green is one of 57 places in Windsor and Maidenhead where we work for window mastic. You can also see our page for Reading, roughly 11 miles from Cox Green.
We work across SL6 for window mastic and the streets around it. That includes homes and businesses on Lock Lane, Curls Road and Thrift Lane. Main roads around Cox Green include the A404(M). If you’re just outside Cox Green, we cover Boyn Hill (1 mile north-east), Maidenhead (1 mile north-east), Woolley Green (1 mile west), Bray Wick (1 mile east) and Pinkneys Green (2 miles north-west). Larger places within reach include Windsor (5 miles south-east), North Ascot (7 miles south), Cookham (3 miles north), Dedworth (5 miles south-east), Broomhall (9 miles south-east) and South Ascot (8 miles south). Cox Green is among the bigger towns we cover in Windsor and Maidenhead.
Around Cox Green
Typical jobs here are in homes near Ockwells Park, The Crown pub and Cox Green School, among other places. Cox Green’s nearest station is Maidenhead station, about 1.1 miles north-east of the centre. Well-known places in the area include St Mark's Hospital (1.2 miles north) and The Reitlinger Bequest Museum (1.9 miles north-east). Green spaces nearby include Weycock Hill and Taplow Lake.
Your questions about window mastic in Cox Green
Is Cox Green within the area you cover?
Yes. Cox Green is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Is Cox Green in your area for window mastic?
Yes. We work across London and the South East, and Cox Green is part of that. Just ring 0345 464 0079 or drop us an email with a few details of the job.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is generally more efficient.
Is it messy?
Tidy work is part of the job. Nearby surfaces are protected, and the area is left clean when we finish.
How long will my window job take?
It depends on access, the old mastic and the size of the frames. We will tell you how long your job needs when we quote.
Is it OK to seal over old sealant?
No. The old sealant always comes out first, so the new sealant bonds properly.
Do you take out the old sealant first?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Will there be a smell?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
For landlords and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.
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.
Towns and villages near Cox Green
Other services in Cox Green
How it works
There is not much for you to do on the day. Show us the job and we will take it from there. The job generally takes anything from an hour or two to a full day, depending on how many frames there are. In a smaller place like Cox Green, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
Getting ready for the visit
- For indoor joints, keep the area dry beforehand if you can
- Keep pets and children clear of the area while we work
- Mention any leaks or damp you’ve noticed
Getting a quote
We don’t publish a price list. Instead, we give you a clear price for your job. To get started, ring 0345 464 0079 or send us an email.
Read more
Surface by surface
uPVC windows
Some uPVC windows were sealed at fitting with a quick bead that never bonded. It comes out, deep gaps get backing rod and the joint is resealed.
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We’ll tell you if that’s what we find.