Greater London · England
New-build mastic & snagging in Dagenham Green, Greater London
New build mastic for Dagenham Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Worktop and upstand sealant coming away
- New-build shower sealant that has already split
- Gaps between new skirting and floors
Different surfaces, different methods
Kitchens
Worktop, upstand and sink joints in new kitchens often get a hurried bead. We remove it and reseal with a kitchen-suitable sealant.
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. We cut out the failed bead, clean and prime, and reseal with anti-fungal sanitary silicone.
New build mastic in Dagenham Green, done properly
A new build should have a neat, sound bead at every joint. When the finish is smeared, patchy or already cracking, it’s worth putting right early, before water gets into the floor or walls. Typical jobs include beads laid onto grit and dust from the build and gaps opening as the house dries out and settles, on bathrooms & en suites, kitchens and skirting & floors.
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.
The work is covered for a year after we finish. If anything is not right with it, call 0345 464 0079 or drop us an email.
- Place
- Dagenham Green (RM9, RM10, RM13)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the cost of new build mastic
Every job gets its own quote. This is what makes a difference:
- How easy the joints are to reach
- Which sealant suits the joint
- Whether old sealant or filler has to be cut out
- Any working-time requirements on site
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference.
Helping us quote
Photos help, but a description is a good start. Please mention:
- What the problem is, such as mould, gaps, leaks or cracking
- If it’s domestic, commercial or a hotel
- Any access issues, like height or stairs
- The address or postcode of the job
We quote each job on its own, so start by telling us what you need. Just phone 0345 464 0079 or email us with the details, and pictures are welcome.
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.
Leave it or put it right?
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it won’t bond to the old layer. A lasting seal starts with removing the old one completely. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Dagenham Green, the repair is bigger than the sealant job would have been.
Doing several joints on one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Why us?
- Every job guaranteed for a year
- White, clear, grey or another colour, product permitting
- Experience in homes, commercial sites and hotels
- Over 20 years’ experience
Take a look at how sealant jobs are priced and our reviews.
How to look after the new joints
Good habits help new joints last longer. A few tips:
- Open a window or run the fan after bathing
- Avoid running a DIY bead over the old one
- Wait for the cure time before using a resealed shower
- Watch for new gaps as the house dries out
Photograph failed sealant before it’s redone and keep the builder’s replies. It’s useful if you need to raise other issues later.
Lifting sealant traps moisture and mould behind it. Resealing before mould gets in saves a harder job later.
Dagenham Green questions
Do you cover Dagenham Green for new build mastic?
Yes, Dagenham Green 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.
Can parking be tricky for a visit in Dagenham Green?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Can you quote for more than one area?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
What do you put in the joint?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Do you take out the old sealant first?
Yes, every time. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
Why does sealant fail so quickly in new builds?
Lots of new homes see sealant crack early. Poor preparation at handover adds to it.
Can I send you my snagging list?
Yes. Snagging lists are a common starting point for us. We agree the sealant items with you before work begins.
Do you guarantee your work?
Yes. There’s a 12-month guarantee on every job, wherever you are.
Also near Dagenham Green
Other services in Dagenham Green
New build mastic around Dagenham Green
Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent. 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.
As a London address, Dagenham Green can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. If you’ve bought a new home near Dagenham Dock station, the sealant around baths, showers and frames is worth checking in the first year or two.
Dagenham Green is about 1 mile south-west of Dagenham, in Greater London. Our applicators cover new build mastic for householders, landlords and businesses in Dagenham Green and the surrounding area. Dagenham Green is one of 764 places in Greater London we cover for new build mastic. There’s also a page for London, about 11 miles away.
Postcode districts we cover here for new build mastic: RM9, RM10 and RM13. Local streets include New Road, Link Road and Ripple Road, all of which we cover. If you are just outside Dagenham Green, we cover Dagenham Dock (1 mile south-west), Beam Park (1 mile east), Hornchurch Marshes (1 mile south-east), Dagenham (1 mile north-east) and Castle Green (1 mile west). Larger places within reach include London (11 miles west), City of Westminster (13 miles west), Marylebone (13 miles west), Kensington (15 miles west), St Pancras (12 miles west) and Shoreditch (10 miles west).
Around Dagenham Green
We work in homes and buildings around Dagenham Park Community School, Cross Keys pub and Parsloes Park and the streets around them. There’s a railway station in Dagenham Green itself: Dagenham Dock station. Other landmarks nearby include Gallions Reach Shopping Park (3.3 miles west) and East End Women's Museum (3.2 miles west). For a walk, there’s Scrattons Eco Park.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
What happens on the day
There isn’t much for you to do on the day. Show us the job and we will take it from there. The work itself takes a few hours for most snagging lists, longer for a run of plots. In a London area like Dagenham Green, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We look at why each joint failed, including any movement.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- The finished joints are checked and the cure times given.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Mention any sign-in or site rules at work premises
- Let us know if you’ve seen damp or leaks
Get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, call 0345 464 0079 or send us an email.