Greater London · England
New-build mastic & snagging in Greengate, Greater London
Our applicators work in Greengate on plot mastic for developers and snagging failed sealant in new homes. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Leaking shower tray seals in a new home
- Worktop and upstand sealant coming away
- Untidy sealant flagged on a snagging list
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Check bath and shower seals every few months as the house settles
- Do not wait for the house to settle if water is getting through
- Avoid running a DIY bead over the old one
- Put sealant faults on your snagging list early
Don’t stand on the bath edge or the lip of the tray in the first few weeks. If a bath or tray moves when you stand in it, get it looked at.
Report failed sealant to the builder while you’re in the snagging period. After that, putting it right may fall to you, so raise it early.
About our new build mastic in Greengate
New homes move as they dry out. Timber shrinks, plaster dries and baths and trays bed down, and sealant applied in a hurry at handover can split. We work on show homes, bathrooms & en suites and skirting & floors, and people most often call us about shower seals failing in the first year or two and smeared, uneven beads picked up at snagging.
Across London, commercial floors have movement joints that break down under heavy foot traffic, while new homes need a neat, sound finish around frames, baths and kitchens before handover, in Greengate and beyond.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.
- Place
- Greengate (E13, E6, E16)
- Region
- Greater London
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What the job involves on each surface
Bathrooms and en suites
En suite seals are easy to miss on a snagging list until they leak. Resealing properly keeps water where it belongs.
Skirting and floors
Floors and skirting move as the house dries and the heating runs. We use a flexible product rather than caulk.
What we do, step by step
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and clear up. Most jobs take a few hours for most snagging lists, longer for a run of plots. In a London area like Greengate, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We start by going through the snagging items or plot schedule with you.
- The failed sealant is removed completely, with no layer left behind.
- We clean out the dust and grit left from the build.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Keep children and pets away from the work area
- Let us know about stairs, lifts or work at height
How to get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. Whenever you are ready, call 0345 464 0079 or send us an email.
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What we’re called out for in Greengate
A new house holds a lot of water from the build, which takes a year or two to dry out. As it does, timber shrinks and joints open and the sealant has to cope with the movement.
Keep an eye out for any of the following:
- Sealant that never bonded to the surface
- Sealant work across a run of new homes
- Leaking shower tray seals in a new home
- Gaps behind new kitchen upstands
As a London address, Greengate can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
What your quote should include
- Whether the sealant suits the joint
- Is the old sealant removed completely?
- How the surfaces are prepared before sealing
- What the quote includes, VAT included or not
What happens if it’s left?
Sealant done properly at handover means fewer callbacks. Snagging visits for failed sealant cost time on every plot. In a flat in Greengate, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you are unsure, call 0345 464 0079 or drop us an email and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Greengate
- 4.9 on Google from 180+ five-star reviews
- 12-month guarantee on every job
- 20+ years of sealant experience
- Domestic, commercial and hotel work
See our cost guide or customer reviews.
DIY versus a professional finish
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
Your questions about new build mastic in Greengate
Can you help a landlord with a rental near West Ham station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll send you a clear quote.
Is parking a problem for a job in Greengate?
Parking in Greengate, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
What do you need from me for a quote?
The location, the problem and the rough size of the job. Photos by email help too.
Do you guarantee your work?
Yes. Every job comes with a one-year guarantee.
Is it worth resealing while the house is still settling?
If the seal has failed and water is getting in, do it now. Hairline cosmetic gaps can wait until the house has settled.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint.
Do you work in Greengate?
Yes. We work in Greengate and the rest of Greater London. To book, ring 0345 464 0079 or send us an email.
What does new build mastic cost?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Deciding who is responsible under a builder’s warranty
- Structural cracks in walls or ceilings
- Movement caused by a poorly fitted tray or bath
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Where we work in Greengate
- Kitchens
- Windows & doors
- Plot handovers
- Show homes
- Skirting & floors
- Bathrooms & en suites
What new build mastic looks like in Greengate
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent.
For new homes near West Ham station, it’s worth checking the sealant early, while snags are still fresh.
Greengate is about 4 miles east of Whitechapel, in Greater London. Homes, rented property, offices and hotels in Greengate can book us for new build mastic. Every job comes with our one-year guarantee. Greengate is one of 764 places in Greater London we cover for new build mastic. You can also see our page for London, about 6 miles away.
Postcode districts we cover here for new build mastic: E13, E6 and E16. Whether your property is on May Road, Emma Road and Cave Road or anywhere close by, we can help. Other places close to Greengate include 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). Larger places within reach include 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).
Landmarks near Greengate
We work in homes and buildings around Coach And Horses Public House, Lister Community School and West Ham Park, among other places. For rail, the closest station is West Ham station, roughly 1 mile west of the centre. A little further out are West Ham United Football Club Museum (0.6 miles north-east) and Stratford Centre (1.5 miles north-west). Green spaces nearby include Old Ford Island and Tower Hill.