Essex · England
Window & door mastic in Gaston Green, Essex
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Gaston Green. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Cracked sealant at the sill ends
- Draughts coming in around windows and doors
- Cracked or shrunken mastic around the frame
Window mastic in Gaston Green
Every window and door frame has a gap around it, and mastic is what closes it. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. If you have untidy mastic left by window fitters and damp patches on the reveal after heavy rain, we can put it right, on composite doors, timber windows & doors and uPVC windows alike.
Somewhere as small as Gaston Green, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
We stand behind the work with a one-year guarantee, so you are covered after we’ve gone.
- Where
- Gaston Green (CM22)
- Wider area
- Essex
- Cover
- One year on every job
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How we quote for window mastic
Jobs vary more than people expect. The main factors:
- Whether there’s mould to deal with
- Whether old sealant or filler has to be cut out
- How many rooms, windows or areas are involved
- Access and height
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Where the property is
- If someone has resealed it before
- Any access issues, like height or stairs
- Roughly how big the job is
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or drop us an email.
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Draughts through the window seals rather than the frame
- A sash or casement that will not close properly
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Composite doors
- Patio & French doors
- Timber windows & doors
- Aluminium frames
- Window sills
- uPVC windows
How to look after the new joints
Aftercare is simple, and it makes a real difference:
- Keep paint off silicone joints
- Check the mastic once a year
- Don’t use solvent cleaners on the joint
- Keep timber frames painted
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. Resealing closes it.
FAQs for Gaston Green
Do you work for landlords with property near Sawbridgeworth station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Is Gaston Green within the area you cover?
Yes, Gaston Green is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can new window sealant be painted?
Most silicone can’t be painted. Let us know beforehand, and we’ll use a paintable product where it suits.
Do you take out the old sealant first?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator.
How long does it take to reseal the windows on a house?
That depends on the number of frames, how they’re reached and the state of the old mastic. You will know the timing when we quote.
Should I try DIY first?
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.
Can you do the inside joint as well?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We do one or both.
How the job changes by surface
Aluminium frames
Aluminium moves with heat, and the frames are often slimmer than uPVC. A tidy bead in anthracite grey, black or a matching colour keeps the clean look.
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We’ll tell you which suits your home.
The process
On the day, we start by going over the job with you. Surfaces next to the work are protected before we start. Most jobs take most of a day for a typical house, less for a few frames. Somewhere as small as Gaston Green, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- 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.
Getting ready for the visit
- Tell us if parking is tricky
- Tell us about access, such as stairs, a lift or high-level joints
- Move anything stored near the joints
How to get a quote
Need a quote? Please call 0345 464 0079 or email us and tell us about the job. We’ll explain what we’d do and give you a clear price before we start.
Related advice
What window mastic looks like in Gaston Green
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Barrington Hall (about 3.2 miles east) are a reminder that the area around Gaston 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.
In the older streets around Church of St Mary the Virgin, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Managing a site like Spellbrook CofE Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Gaston Green is about 3 miles south of Bishop's Stortford, in Essex. Every kind of property in Gaston Green is covered for window mastic. Every job comes with our 12-month guarantee. Across Essex, we cover 644 places, Gaston Green among them. There’s also a page for Chelmsford, about 15 miles away.
Work in CM22 is quoted and booked the same way as anywhere else. Local streets include Sawbridgeworth Road and Old Mill Lane. Close by, we work in Little Hallingbury (1 mile north), Spellbrook (1 mile west), Thorley Street (1 mile north-west), Lower Sheering (2 miles south) and Thorley (2 miles north-west). Further out, we also cover Chelmsford (15 miles south-east), Harlow (5 miles south-west), Brentwood (15 miles south), Loughton (14 miles south), Saffron Walden (13 miles north) and Waltham Abbey (12 miles south-west).
Landmarks near Gaston Green
Locally, jobs take us to homes and businesses close to Leventhorpe and The George pub. Gaston Green’s nearest station is Sawbridgeworth station, about 1.4 miles south-west. Other landmarks nearby include Harlow Mill (3.5 miles south-west) and Herts and Essex Hospital (2.3 miles north). For a walk, there’s Sawbridgeworth Marsh and Portingbury Hills.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Nearby places to Gaston Green
More services for Gaston Green
Common problems we fix in Gaston Green
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 cannot keep up eventually tears.
Look out for any of the following:
- Rushed sealant from a window installation
- Gaps between the frame and the inside reveal
- Hard, cracked sealant around windows
- Cracked sealant at the sill ends
Letting a property close to Sawbridgeworth station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Comparing quotes
- How the surfaces are prepared before sealing
- What the cure time is
- Which colour the sealant will be
- Who turns up on the day