Essex · England
Gubbion's Green Window Mastic
Professional window mastic in and around Gubbion's Green, with every bit of old sealant taken out first and a 12-month guarantee.
- Leaking joints at the ends of sills
- Damp patches on the reveal after heavy rain
- White mastic on grey or black frames
Looking after it afterwards
Joint life depends on how it’s used and looked after. Here’s what we suggest:
- Do not paint over the silicone
- Clear any debris from frame drain holes
- Wash the frames with mild soapy water
- Air rooms to keep condensation down around windows
On timber frames, keep the paintwork in good order, because bare, wet timber moves more and pulls at the joint. Paint up to the joint, not over the silicone.
Signs to watch for: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
How we handle window mastic in Gubbion's Green
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. Our applicators cut it out and replace it with a flexible, weatherproof sealant. We’re often asked to deal with untidy mastic left by window fitters and white mastic on grey or black frames, across aluminium frames, patio & French doors and composite doors.
Somewhere as small as Gubbion's Green, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
We stand behind the work with a 12-month guarantee.
- Place
- Gubbion's Green (CM3)
- Region
- Essex
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Also near Gubbion's Green
Also in Gubbion's Green
FAQs for Gubbion's Green
Can you do window mastic in Gubbion's Green?
Yes, Gubbion's Green is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job.
Is Gubbion's Green within the area you cover?
Yes, Gubbion's Green is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do I have to be there?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Will new mastic stop draughts?
Yes, where the draught is at the frame edge. We check where the draught is before any work starts.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Are you fully insured?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
Do you work on first-floor windows?
Yes, in most cases. Access is planned before work begins.
Where are you based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Gubbion's Green homes and the weather
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.
Rented homes near Cressing station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Gubbion's Green is about 4 miles south-west of Braintree, in Essex. Every kind of property in Gubbion's Green is covered for window mastic. The work is guaranteed for a year. Gubbion's Green is one of 644 places in Essex we cover. Our Chelmsford page covers work nearby, about 7 miles away.
We cover every part of CM3 for window mastic and the streets around it. Other places close to Gubbion's Green include Great Leighs (1 mile west), Young's End (1 mile north), Fuller Street (1 mile south-east), Row Green (2 miles north) and Fairstead (2 miles east). Larger places within reach include Chelmsford (7 miles south), Braintree (4 miles north-east), Maldon (10 miles south-east), Billericay (15 miles south), Witham (5 miles south-east) and Wickford (15 miles south).
What’s near Gubbion's Green
Typical jobs here are in homes near The Castle pub, among other places. The closest station to Gubbion's Green is Cressing station, about 2.9 miles north-east of the centre. Well-known places in the area include William Julien Courtauld Hospital (3.2 miles north) and Cressing Temple (3.8 miles east). Open spaces near Gubbion's Green include Sandylay and Moat Woods.
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too in Gubbion's Green and across Essex. Several sites can be quoted together.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
What happens on the day
You do not need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the work takes most of a day for a typical house, less for a few frames for a typical job. Somewhere like Gubbion's Green 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.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- 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
- Where the joints are inside, avoid wetting them before we arrive
- Tell us about any water getting in
- Tell us about any previous sealing or DIY attempts
Ask for a quote
Need a quote? Please phone 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Related advice
When to call us in Gubbion's Green
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and timber moves with moisture as well as temperature.
Keep an eye out for any of the following:
- Black, perished sealant on frames
- Sealant in the wrong colour for the frame
- Draughts coming in around windows and doors
- Draughty joints inside around the window
For site and facilities teams at buildings such as Great Leighs Primary School, the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- Is the old sealant removed completely?
- How the surfaces are prepared before sealing
- Who does the work, and how experienced they are
- What insurance they hold
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Rotten timber, which needs a joiner first
- Broken hinges, locks or handles
- Penetrating damp from a failed cavity tray or render
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Where we work in Gubbion's Green
- Timber windows & doors
- Patio & French doors
- Window sills
- Aluminium frames
- uPVC windows
- Composite doors
How the job changes by surface
Patio & French doors
Door frames take knocks and movement every time the doors are used. A flexible sealant copes with that without cracking.
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We will tell you if that is what we find.