Essex · England
Keeres Green Window Mastic
Specialist window mastic for Keeres Green: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- White mastic on grey or black frames
- Cold air getting in at the frame edge
- Old mastic that has gone black or come away
The process
When we arrive, we look over the joints with you first. We protect the surfaces around the joints before any work begins. The work normally takes a few hours for a handful of frames, longer for a whole house. In a small place like Keeres Green, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- Deep gaps are filled with backing rod to set the depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Every joint is checked before we leave.
How to prepare
- Keep pets and children clear of the area while we work
- For business premises, tell us about site rules or sign-in
- Tell us about any previous sealing or DIY attempts
Getting a quote
We don’t publish a price list, because every job is different. Instead, we give you a clear price for your job. To get started, phone 0345 464 0079 or send us an email.
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Window mastic in Keeres Green, done properly
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that cannot move properly, so deep gaps get backing rod first. The sealant then grips the two sides it should. We work on timber windows & doors, uPVC windows and aluminium frames, and common reasons people get in touch are gaps between the frame and the inside reveal and rushed sealant from a window installation.
In a village or hamlet like Keeres Green, older cottages and farmhouses often have timber windows set in stone or brick. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we will put it right.
- Where
- Keeres Green (CM6)
- Wider area
- Essex
- Guarantee
- A year, on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What the job involves on each surface
Window sills
The end joints of a sill tend to fail before the rest. A tight seal at each end keeps rain out of the wall.
Patio & French doors
Water at the foot of a door frame is not always the mastic: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We check before we reseal.
Can I do it myself?
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What window mastic looks like in Keeres Green
Historic houses like Barrington Hall (about 3.4 miles north-west) are a reminder that the area around Keeres Green 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. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Managing a site like Rodings Primary School? Then the mastic around its windows and doors needs looking after like any other building’s. For an older house near a landmark such as Parish Church of St Michael and All Angels, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Keeres Green is about 8 miles south-east of Bishop's Stortford, in Essex. Every kind of property in Keeres Green can book us for window mastic. The work is guaranteed for a year. Our Essex coverage runs to 644 places, Keeres Green among them. You can also see our page for Chelmsford, about 9 miles away.
All of CM6 is covered for window mastic, from the main roads to the quietest streets. Close by, we work in Roundbush Green (1 mile north), Great Canfield (2 miles north), High Roding (2 miles north), High Easter (2 miles east) and Stagden Cross (3 miles east). Larger places within reach include Chelmsford (9 miles south-east), Braintree (12 miles north-east), Harlow (9 miles west), Brentwood (12 miles south), Billericay (13 miles south) and Witham (14 miles east).
Local landmarks in Keeres Green
In Keeres Green, that means homes and buildings near King William IV Public House, among other places. Nearby you will also find Willingale Doe (3.8 miles south).
When something else is needed
We will not take on work that won’t last, so these are the limits:
- Faulty window hardware
- Rotten timber, which needs a joiner first
- Condensation trapped between the panes
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before booking.
Where we work in Keeres Green
- uPVC windows
- Aluminium frames
- Timber windows & doors
- Window sills
- Patio & French doors
- Composite doors
Questions from Keeres Green
What guarantee comes with window mastic in Keeres Green?
Every job comes with our one-year guarantee, wherever it is. We are fully insured, and an ARBOMaster approved applicator.
Can you do window mastic in Keeres Green?
Yes. Our work covers London and the South East, and Keeres Green is part of that. You can phone 0345 464 0079 or email us and let us know what needs doing.
How many windows can you do in a day?
It depends on access, the old mastic and the size of the frames. You will know the timing when we quote.
Can new sealant go over the old?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.
Can I paint over the new sealant?
Not if it’s silicone. We choose the product with your decorating in mind, so mention it when you book.
Do you take out the old sealant first?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
Can you do upstairs windows?
Yes, in most cases. Access is planned before any work starts.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint before we leave.
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Avoid blasting the frames with a pressure washer
- Keep paint off silicone joints
- Keep drainage slots and sill grooves clear
- Air rooms to keep condensation down around windows
A yearly look round the frames is enough. Small splits are simple to catch before they leak, and if anything looks wrong, just ring 0345 464 0079 or email us.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so early resealing is worth it.
Landlords, agents and businesses in Keeres Green
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will quote.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Also near Keeres Green
What else we do in Keeres Green
What affects the cost of window mastic
We do not publish a price list, because no two jobs are the same. The quote depends on:
- Working hours on commercial sites
- The product the joint needs
- The number and length of the joints
- Any mould that needs treating
Doing several joints on one visit generally makes better use of the time than several visits. We will give you a clear quote for the lot.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- Photos by email, if that is easy
- Whether it’s a home or a business
- Any access issues, like height or stairs
- Where the property is
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. Whenever you’re ready, phone 0345 464 0079 or email us.