Greater London · England
New Build Mastic in Fish Island
Our applicators work in Fish Island on plot mastic for developers and snagging failed sealant in new homes. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Cracked caulk along new skirting
- Plot mastic for developers ahead of handover
- Cracks appearing as a new home settles
New build mastic for homes and businesses in Fish Island
Failed shower seals, gaps along the skirting and messy beads are common items on a new-home snagging list. While the builder’s snagging or warranty period runs, report it to them first and if that stalls, we can do it. Common call-outs are for beads laid onto grit and dust from the build and internal frame sealant that has split, on bathrooms & en suites, kitchens and plot handovers.
Much of London’s new housing is flats in larger developments. Snagging there often goes through the developer or managing agent, and shower seals that fail early, skirting joints that open up and gaps at thresholds are all common snags.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Fish Island (E3, E9, E20)
- Region
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Work for landlords, hotels and businesses
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
The process
When we arrive, we start by going over the job with you, so you know exactly what we are doing. Surfaces next to the work are protected before any work starts. The work normally takes anything from a few hours to several days, depending on the number of plots. In a London area like Fish Island, 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.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out.
- We clean out the dust and grit left from the build.
- We prime where needed and apply a sealant suited to each joint.
- We tool every joint neatly and tell you when each area can be used.
How to prepare
- Mention any sign-in or site rules at work premises
- Clear items away from the joints we are working on
- Plan for the work area to be out of bounds to pets and children
Get a quote
We quote each job on its own, so the first step is telling us about yours. Simply phone 0345 464 0079 or email us and describe the job and send photos if you have them.
Read more
How to look after the new joints
Joint life depends on how it’s used and looked after. We suggest:
- Ventilate bathrooms well, especially in the first year
- Put sealant faults on your snagging list early
- Clean sealant with mild detergent, not abrasives
- Avoid running a DIY bead over the old one
Wipe the sealant with warm soapy water. Avoid abrasive pads and strong solvents as they wear the bead.
A seal that splits early is often a sign of movement. Have it resealed, and the tray or bath checked, before it gets worse.
Joints and finishes in Fish Island homes
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 snagging may go through the developer or managing agent.
Fish Island is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Fish Island is about 1 mile west of Stratford, in Greater London. Every kind of property in Fish Island can book us for new build mastic, old or new, large or small. The work is guaranteed for a year. Our area takes in 764 places across Greater London, from the larger towns to small villages.
Our applicators cover all of E3, E9 and E20 for new build mastic and the streets around it. You will find streets such as Wick Lane, Dace Road and Wyke Road, all of which we cover. Neighbouring places we cover for new build mastic include Hackney Wick (1 mile north), Old Ford (1 mile south), Donnybrook Quarter (1 mile south-west), Bow (1 mile south) and East Village (1 mile north-east). Within a short drive, we also cover London (4 miles south-west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (8 miles west), St Pancras (4 miles west) and Shoreditch (3 miles west).
Landmarks near Fish Island
Typical jobs here are in homes near Mulberry UTC, Grove Hall Park and The Lea Tavern. There’s a railway station in Fish Island itself: Hackney Wick station. Other landmarks nearby include V&A East (less than half a mile east) and Tower of London (3.1 miles south-west). Not far away are Hollow Pond and Tower Hill.
Also near Fish Island
What else we do in Fish Island
Signs you need new build mastic in Fish Island
Sealant applied onto damp surfaces does not bond well. Site programmes don’t always leave time for joints to dry.
Any of these means the joints need attention:
- Sealant work across a run of new homes
- Joints pulling apart as timber shrinks
- Messy sealant that spoils new finishes
- Skirting joints opening in the first winter
If you’ve bought a new home near Hackney Wick station, the sealant around baths, showers and frames is worth checking in the first year or two.
What your quote should include
- Whether they’re fully insured
- What product goes in the joint
- How the joint is cleaned and prepared
- Whether they seal over old material or remove it
Honest limits
We’d rather tell you now than do work that will not last, so these are the limits:
- Damaged fittings that need replacing
- Deciding who is responsible under a builder’s warranty
- Structural cracks in walls or ceilings
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
Where we work in Fish Island
- Bathrooms & en suites
- Windows & doors
- Kitchens
- Plot handovers
- Show homes
- Skirting & floors
Questions from Fish Island
Can parking be tricky for a visit in Fish Island?
Parking in Fish Island, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
I let a flat near Hackney Wick station. Can you help?
Yes, we work for landlords and letting agents. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Are you fully insured?
Yes. We’re fully insured for domestic and commercial work.
Can you match the sealant colour to my new kitchen or bathroom?
Most bathroom joints are white or clear, but other colours are available. We match the colour to the finish and agree it with you.
What information do you need?
Tell us what needs doing and where. We will ask anything else we need to know.
How long does new build mastic take?
As a guide, most jobs take anything from a few hours to several days, depending on the number of plots. Bigger jobs take longer.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We will tell you how long to leave the joint.
Do you take out the old sealant first?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
What the job involves on each surface
Show homes
Tired or marked sealant in a show home can be renewed. The old bead comes out and a clean new one goes in.
Skirting and floors
Floors and skirting move as the house dries and the heating runs. Caulk cracks; a flexible sealant moves with it.
Why deal with it now?
Small cosmetic gaps can wait for the house to settle, but a leaking seal cannot. If you’re unsure which you have, phone 0345 464 0079 or drop us an email with photos and we will give you a straight answer. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, call 0345 464 0079 or email us for an honest opinion and a quote.
Why Fish Island customers choose us
- Sanitary silicone with an anti-fungal additive in wet areas
- Sealant colour chosen to suit
- We are fully insured
- More than 20 years in sealant work