Greater London · England
New Build Mastic in North Woolwich
New build mastic in North Woolwich from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Plot mastic for developers ahead of handover
- Frame joints opening as the plaster dries
- Smeared, uneven beads picked up at snagging
What happens if it’s left?
If you’re still in the builder’s snagging or warranty period, ask them to put it right first. If it keeps failing or is not dealt with, we can reseal it properly. In a flat in North Woolwich, 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.
Combining jobs into one visit is generally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
What you get with us
- Quality sealants from Arbo and Everbuild
- We are fully insured
- Sealant colour chosen to suit
- More than 20 years in sealant work
Take a look at how sealant jobs are priced or our reviews.
About our new build mastic in North Woolwich
Some owners wait for the first year’s movement before having joints redone. For small cosmetic gaps, that’s reasonable, but a failed shower or bath seal shouldn’t wait. We are often asked to deal with untidy sealant flagged on a snagging list and new-build shower sealant that has already split, on plot handovers, kitchens and bathrooms & en suites.
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.
There’s a 12-month guarantee on every job, large or small.
- Location
- North Woolwich (SE18, E16, E6)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How the visit works
We bring everything the job needs with us, so you do not need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. It normally takes a few hours in a single home. In North Woolwich, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- 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.
- We tool every joint neatly and tell you when each area can be used.
How to prepare
- Let us know if you’ve seen damp or leaks
- Mention any tricky access
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Advice
Towns and villages near North Woolwich
What else we do in North Woolwich
Different surfaces, different methods
Windows and doors
Internal joints between frames and plaster often crack as a new house dries. We cut out the cracked bead and reseal with a flexible sealant that suits the frame.
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.
DIY versus a professional finish
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Joints and finishes in North Woolwich homes
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the managing agent.
As a London address, North Woolwich can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. For new homes near Woolwich Dockyard station, it’s worth checking the sealant early, while snags are still fresh.
North Woolwich is about 1 mile north of Woolwich, in Greater London. Wherever you are in the SE18 postcode area, we can carry out new build mastic at your property. Our area takes in 764 places across Greater London. For nearby work, see our London page, about 7 miles away.
Work in SE18, E16 and E6 works the same way as everywhere else we cover. New build mastic is available to properties on Drew Road, Tate Road and Pier Road and the roads around them. Other places close to North Woolwich include Cyprus (1 mile north), Royal Docks (1 mile north-west), Beckton (1 mile north-east), Silvertown (1 mile west) and Custom House (1 mile west). Within a short drive, we also cover London (7 miles west), City of Westminster (9 miles west), Marylebone (9 miles west), Kensington (11 miles west), St Pancras (8 miles west) and Shoreditch (6 miles west).
What’s near North Woolwich
Around North Woolwich, our work takes us to homes and buildings near Beckton District Park, Drew Primary School and The Mitre pub and the streets around them. For rail, the closest station is Woolwich Dockyard station, roughly 0.7 miles south of the centre. Other landmarks nearby include British Hospital for Mothers and Babies (0.8 miles south-west) and Gallions Reach Shopping Park (1.1 miles north-east). Green spaces nearby include Gilbert's Pit.
Work for landlords, hotels and businesses
We work for landlords and agents as well as householders. Sealant work between tenants is a simple way to keep a property in good order.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can go on one quote.
Questions from North Woolwich
Can you do new build mastic in North Woolwich?
Yes. We work across London and the South East, and North Woolwich is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing.
Can parking be tricky for a visit in North Woolwich?
Parking in North Woolwich, 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.
Do you take on second-fix sealing for builders?
Yes. Second-fix sealing in bathrooms, kitchens, frames and floors is part of what we do. Good preparation keeps snagging to a minimum.
Do you work for hotels and businesses?
Yes. We can plan bigger jobs in stages.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme.
Is it normal for sealant to crack in a new home?
Lots of new homes see sealant crack early. Rushed application on dusty surfaces makes it worse.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few pictures.
Do you use white or clear sealant?
That depends on what the joint meets: white or clear for most sanitary joints, colours for worktops, floors and frames. We’ll agree it with you first.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Don’t wait for the house to settle if water is getting through
- Ventilate bathrooms well, especially in the first year
- Follow the cure time we give you
- Avoid running a DIY bead over the old one
Follow the cure time we give you before the area gets wet. Most silicones need around a day before water reaches them.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Left alone, a small crack can become a leak in a busy bathroom.
When something else is needed
It helps to know what we cannot do too:
- Structural cracks in walls or ceilings
- Deciding who is responsible under a builder’s warranty
- Damaged fittings that need replacing
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think.
What we seal
- Windows & doors
- Show homes
- Bathrooms & en suites
- Skirting & floors
- Plot handovers
- Kitchens