Greater London · England
Window & door mastic in Greengate, Greater London
Mastic around window and door frames, sills and patio doors for Greengate, backed by a one-year guarantee. Call for a quick quote.
- Hard, cracked sealant around windows
- Water coming in at the bottom corners of a door
- Cold air getting in at the frame edge
Window mastic in Greengate
Frames and walls don’t move together. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. That’s why the joint needs a flexible, low-modulus sealant rather than something rigid. Common call-outs are for whistling draughts around closed windows and gaps where the sill meets the wall, on uPVC windows, composite doors and patio & French doors.
Many London homes are flats, with windows high above the street. Who looks after the outside of the frames can depend on the lease, so check that first.
We stand behind the work with a one-year guarantee, so you’re covered after we have gone.
- Place
- Greengate (E13, E6, E16)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Letting agents and landlords in Greengate can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
What the job involves on each 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 suits the frame.
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. If we find rot, we’ll tell you before going ahead, as a joiner will need to deal with it.
Window mastic in Greengate: local notes
With historic houses such as Eastbury Manor House (about 3.1 miles east) nearby, there’s older building stock in the area around Greengate as well as newer homes. Where a home is older, 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, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around St Andrew's Church, the joint between an old wall and a newer frame is generally the first place rain gets in. As a London address, Greengate can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Greengate is about 4 miles east of Whitechapel, in Greater London. If you need window mastic in Greengate, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We’re based in Crawley and cover Greater London, Greengate included. Our area takes in 764 places across Greater London, from the larger towns to small villages. London is on our list too, about 6 miles from Greengate.
Work in E13, E6 and E16 is quoted and booked the same way as anywhere else. If you need window mastic at a property on May Road, Emma Road and Cave Road or a nearby road, we can help. Close by, we work in Plaistow (1 mile south-west), Upton Park (1 mile north-east), Upton (1 mile north), West Ham (1 mile north-west) and Canning Town (1 mile south). We also work in nearby towns such as London (6 miles west), City of Westminster (8 miles west), Marylebone (8 miles west), Kensington (10 miles west), St Pancras (6 miles west) and Shoreditch (5 miles west).
What’s near Greengate
Around Greengate, our work takes us to homes and buildings near Coach And Horses Public House, Lister Community School and West Ham Park. The nearest railway station is West Ham station, about 1 mile west of the centre. Well-known places in the area include West Ham United Football Club Museum (0.6 miles north-east) and Stratford Centre (1.5 miles north-west). Open spaces near Greengate include Old Ford Island and Tower Hill.
How it works
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it generally takes a few hours for a few frames, or a day or more for a whole house. In a London area like Greengate, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Finally we tidy up and check each joint.
How to prepare
- Try not to wet indoor joints just before the visit
- Clear items away from the joints we are working on
- Let us know about parking restrictions
How to get a quote
We quote each job on its own, so start by telling us what you need. Simply ring 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
Related advice
Signs you need window mastic in Greengate
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, leaving a hairline gap down one side.
Look out for any of the following:
- Gaps where the sill meets the wall
- Mastic that has split away from the wall
- Gaps left after new windows were fitted
- Cracked internal joints between frame and plaster
If you look after a building such as Southern Road Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
What to look for in a quote
- How the surfaces are prepared before sealing
- How long to leave it before use
- Is the old sealant removed completely?
- What insurance they hold
What affects the quote in Greengate
Call for a quick quote. The main things that affect it are:
- Which sealant suits the joint
- How many areas need sealing
- Access and height
- Any working-time requirements on site
We don’t show prices on the website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Asking for a quote
Before you ask for a quote, have a think about:
- If someone has resealed it before
- The address or postcode of the job
- What’s wrong with the joints now
- Any access issues, like height or stairs
For window mastic in Greengate, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you’ll get a clear quote before any work starts.
Towns and villages near Greengate
Also in Greengate
Aftercare tips
After the cure time, these simple habits help:
- Air rooms to keep condensation down around windows
- Repaint timber before it’s bare
- Walk round the house once a year and look at the joints
- Avoid blasting the frames with a pressure washer
Timber frames need their paint kept up, because bare, wet timber moves more and pulls at the joint. Paint up to the joint, not over the silicone.
Leaks generally show up in wet, windy weather, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
Questions from Greengate
Is parking an issue for window mastic in Greengate?
Parking in Greengate, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
Can you do window mastic in Greengate?
Yes, Greengate is within the area we cover. We work across London and the South East. Just call 0345 464 0079 or send us an email with a few details of the job, and we’ll send you a clear quote.
Can I add another job to the visit?
Yes. Just list everything you need and you will get one quote.
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 I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Can you get sealant to suit coloured frames?
Yes, we choose a colour to suit the frame. Anthracite grey, black, brown and white cover most frames, with clear as an option.
Do you hold any approvals?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Do you do commercial work?
Yes, regularly. We can plan bigger jobs in stages to suit the site.
Why deal with it now?
Resealing frames is a short job: the visit takes a few hours for a handful of frames, longer for a whole house. Wait for damp to appear and there may be plaster and decorating to sort out too. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first and agree the price before starting.
Why choose Mr Mastic in Greengate
- We agree the colour with you first
- ARBOMaster approved applicator
- Tidy, careful work
- Sealant colour chosen to suit
Take a look at how sealant jobs are priced and what customers say.