Greater London · England
New-build mastic & snagging in Isle of Dogs, Greater London
New build mastic in Isle of Dogs from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cracked caulk along new skirting
- Gaps behind new kitchen upstands
- Cracks appearing as a new home settles
About our new build mastic in Isle of Dogs
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 it isn’t put right, get in touch with us. If you have cracks appearing as a new home settles and skirting joints opening in the first winter, we can help, on kitchens, skirting & floors and windows & doors alike.
From brand-new flats to converted terraces with new flooring, London has every kind of floor. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement.
We stand behind the work with a one-year guarantee, so you’re not left on your own once the job is done.
- Location
- Isle of Dogs (E14, SE8, SE10)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
The process
We work through the job in order: protect, prepare, seal, tidy. Typically it takes anything from a few hours to several days, depending on the number of plots, and the area is left clean. For a job in Isle of Dogs, parking and access are the things to plan: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- Each joint is checked for movement before any work starts.
- We remove the failed sealant and clean the joints.
- Joints are dried and primed where the product calls for it.
- Baths are filled with water, then the new sealant is applied.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Tell us about any previous sealing or DIY attempts
- On commercial sites, let us know about site rules
Get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Related advice
Also near Isle of Dogs
Other services in Isle of Dogs
What the job involves on each surface
Skirting and floors
As timber and screed dry, skirting and floors shift. We use a flexible product rather than caulk in a colour to suit.
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.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
Joints and finishes in Isle of Dogs homes
Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent. 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.
As a London address, Isle of Dogs can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. For new homes near Greenwich station, it’s worth checking the sealant early, while snags are still fresh.
Isle of Dogs is about 1 mile north-west of Greenwich, in Greater London. For new build mastic in and around Isle of Dogs, please ring 0345 464 0079 or send us an email for a quick quote. We cover Greater London from our Crawley base, Isle of Dogs included. Our area takes in 764 places across Greater London.
Our applicators cover all of E14, SE8 and SE10 for new build mastic. If you need new build mastic at a property on Creek Road, Wynan Road and Undine Road or a nearby road, our applicators can take on the job. If you’re just outside Isle of Dogs, we cover North Greenwich (1 mile north-west), Millwall (1 mile west), Cubitt Town (1 mile north-east), Deptford (1 mile south-west) and Greenwich (1 mile south-east). Further out, we also cover London (3 miles west), City of Westminster (6 miles west), Marylebone (6 miles west), Kensington (8 miles west), St Pancras (5 miles north-west) and Shoreditch (4 miles north-west).
Landmarks near Isle of Dogs
Around Isle of Dogs, our work takes us to homes and buildings near The Ferry House Public House, Laban Centre and St. Paul's, among other places. Nearby too are Mudchute Park and Farm (within half a mile north-east) and Canary Wharf College 3 (within half a mile north). For rail, the closest station is Greenwich station, about 0.7 miles south. Nearby you’ll also find Greenwich Castle (1 mile south-east) and Surrey Quays Shopping Centre (1.3 miles west). The countryside around Isle of Dogs includes Tower Hill and Sue Godfrey Nature Park.
What affects the quote in Isle of Dogs
The quote reflects the job in front of us. We look at:
- Any working-time requirements on site
- How many areas need sealing
- Whether old sealant or filler has to be cut out
- The product the joint needs
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first and give you a clear quote before work begins.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- Roughly how big the job is
- Whether it’s a home or a business
- Where the job is, and your postcode
- What’s wrong with the joints now
For new build mastic in Isle of Dogs, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before work begins.
Why act early in Isle of Dogs
Water getting past a failed seal in a new build reaches walls and floors that are still settling. Resealing promptly protects the new finishes around it. In a flat in Isle of Dogs, 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.
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts.
Why choose Mr Mastic in Isle of Dogs
- ARBOMaster approved applicator
- We are fully insured
- Rated 4.9 stars on Google
- We leave the area clean and tidy
Take a look at our cost guide and customer reviews.
What we can’t put right
A few problems are outside what sealant work can do:
- Leaks from pipes, valves or wastes, which need a plumber
- Structural cracks in walls or ceilings
- Damaged fittings that need replacing
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Bathrooms & en suites
- Show homes
- Skirting & floors
- Plot handovers
- Windows & doors
- Kitchens
Common questions in Isle of Dogs
Can you help a landlord with a rental near Greenwich station?
Yes, we work for landlords and letting agents. Just call 0345 464 0079 or email us and tell us about the property, and we’ll send you a clear quote.
Can parking be tricky for a visit in Isle of Dogs?
Parking in Isle of Dogs, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Can you do plot mastic on a new development?
Yes. We take on second-fix sealant work across new plots. Good preparation keeps snagging to a minimum.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
Do you take out the old sealant first?
Yes. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Can you do several jobs on one visit?
Of course. Combining jobs makes good use of the visit.
Where is Mr Mastic based?
We work from Crawley. We cover Isle of Dogs and the rest of Greater London, along with the rest of our area.
Is it worth resealing while the house is still settling?
For failed seals that let water through, the best time is now. Cosmetic gaps can wait until the first year or two of movement has passed.
Work for landlords, hotels and businesses
If you manage several properties in or around Isle of Dogs, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.