Essex · England
Window & door mastic in High Ongar, Essex
Our applicators work in High Ongar on mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- A bead that doesn’t match the frame
- Rushed sealant from a window installation
- Cracked sealant at the sill ends
Window mastic for homes and businesses in High Ongar
From a single sill to a whole house of windows, you will get a clear quote before any work starts. To get one, phone 0345 464 0079 or send us an email with the number of frames and any access details. Typical jobs include gaps left after new windows were fitted and gaps between the frame and the inside reveal, on aluminium frames, uPVC windows and patio & French doors.
Outdoor sealant needs dry, clean surfaces, so work on frames around High Ongar is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- High Ongar (CM5)
- Wider area
- Essex
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Common problems we fix in High Ongar
Mastic ages in the weather. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
Most people get in touch after spotting one of these:
- Hard, cracked sealant around windows
- Rushed sealant from a window installation
- Sealant in the wrong colour for the frame
- Draughty joints inside around the window
If you look after a building such as High Ongar Primary School, the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- Whether they’re fully insured
- What the quote includes, VAT included or not
- What guarantee comes with the work
- Whether all the old sealant comes out first
Places near High Ongar
Other services in High Ongar
How we quote for window mastic
Call for a quick quote. The main things that affect it are:
- Any mould that needs treating
- The number of rooms or windows
- The amount of work
- The product the joint needs
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first.
What we need to know
What to tell us when you ask for a quote:
- If it’s domestic, commercial or a hotel
- What’s wrong with the joints now
- Roughly how big the job is
- The address or postcode of the job
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. Whenever you’re ready, call 0345 464 0079 or drop us an email.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Avoid blasting the frames with a pressure washer
- Avoid harsh chemicals near the mastic
- Wash the frames with mild soapy water
- Paint up to the joint, not over it
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. Resealing closes it.
Surface by surface
Patio & French doors
Not every patio door leak is a mastic problem: worn seals, blocked drainage slots or a poor threshold detail can be the cause. We look for the cause first.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We can talk through the options.
Frames and glazing around High Ongar
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as Church of St Mary the Virgin, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
High Ongar is about 6 miles north of Brentwood, in Essex. Our applicators cover window mastic for homeowners, landlords and businesses in High Ongar and nearby, as part of our work across Essex. High Ongar is one of 644 places in Essex where we work. You can also see our page for Chelmsford, roughly 10 miles from High Ongar.
Postcode districts we cover here for window mastic: CM5. Streets in the area include The Street, Mill Lane and Millfield, all of which we cover. Neighbouring places we cover for window mastic include Chipping Ongar (1 mile west), Shelley (1 mile north-west), Norton Mandeville (1 mile north-east), King Street (1 mile east) and Greensted (2 miles west). Further out, we also cover Chelmsford (10 miles east), Basildon (12 miles south-east), Harlow (8 miles north-west), Brentwood (6 miles south), Billericay (9 miles south-east) and Loughton (9 miles south-west).
Around High Ongar
In High Ongar, that means homes and buildings near Red Lion Public House and The Ongar Academy, among other places. Nearby you will also find Willingale Doe (3.7 miles north-east).
Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
For anyone letting property in or around High Ongar, several properties can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
When it is not the sealant
We’d rather tell you now than do work that will not last, so these are the limits:
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Faulty window hardware
- Damp problems in the wall away from the window
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Patio & French doors
- Composite doors
- Aluminium frames
- Timber windows & doors
- Window sills
- uPVC windows
High Ongar: your questions answered
Can you do window mastic in High Ongar?
Yes, High Ongar is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or drop us an email and tell us what needs doing, and we will give you a clear price.
Is window mastic in High Ongar guaranteed?
All our work, in High Ongar and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
How much does window mastic cost in High Ongar?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote.
Can you do the inside joint as well?
Yes. Draughts often come through the inside gap too, so it can be worth sealing both.
Is it OK to seal over old sealant?
No. We remove every bit of old sealant first, so the new sealant bonds properly.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we are done.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
Is there any odour?
There can be a smell while the sealant cures. Ventilation helps.
The process
Good joint work is mostly preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for a few frames, or a day or more for a whole house. In a small place like High Ongar, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Let us know about stairs, lifts or work at height
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
How to get a quote
If you are in High Ongar and need window mastic, call 0345 464 0079 or send us an email. Tell us what the problem is and where, and we will agree the price before any work begins.