Greater London · England
New-build mastic & snagging in North End, Greater London
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in North End and across Greater London. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Internal frame sealant that has split
- Leaking shower tray seals in a new home
- Messy sealant that spoils new finishes
How it works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for most snagging lists, longer for a run of plots, and the area is left clean. In North End, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- First we work through your snagging list or plot schedule with you.
- We cut out every bit of the failed or messy sealant.
- Surfaces are cleaned of building dust and primed where needed.
- We apply a sealant that suits each joint and tool it to a neat finish.
- Finally, each room is checked and you are given the cure time.
How to prepare
- Tell us if parking is tricky
- Tell us about any water getting in
- Move anything stored near the joints
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or send us an email.
Advice
New build mastic for homes and businesses in North End
Across North End, we work for both new-home owners and the builders handing those homes over. Whether it’s one en suite or a run of plots, the method is the same: remove, clean, prime where needed, then a neat new bead. Typical jobs include new-build shower sealant that has already split and frame joints opening as the plaster dries, on windows & doors, plot handovers and show homes.
Shops, offices and commercial units across London have hard-wearing floors with movement joints that need resealing as they wear, while new homes need a neat, sound finish around frames, baths and kitchens before handover.
Your job is guaranteed for a year, as with all our work.
- Place
- North End (W14, SW6, SW5)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Nearby places to North End
What else we do in North End
Surface by surface
Show homes
Tired or marked sealant in a show home can be renewed. We cut it out and reseal neatly.
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. A proper reseal keeps water in the tray.
Signs you need new build mastic in North End
If plaster or screed was still damp when it was sealed, the bond suffers. On a busy site, joints are not always given time to dry before the sealant goes on.
It’s worth asking for a quote if you see:
- New-build shower sealant that has already split
- Gaps opening as the house dries out and settles
- Worktop and upstand sealant coming away
- Frame joints opening as the plaster dries
North End is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
What your quote should include
- How the joint is cleaned and prepared
- How hidden problems are handled
- The length of the guarantee
- Who does the work, and how experienced they are
Keeping the joints in good condition
Simple care keeps the joints in good condition. Our advice:
- Record problems with dated photos
- Check bath and shower seals every few months as the house settles
- Don’t seal over failed sealant yourself
- Get a leaking seal dealt with right away
Keep the bathroom ventilated, especially in the first year. Use the extractor fan or open a window after showers so moisture does not sit on the sealant.
Report failed sealant to the builder while you are in the snagging period. After that, putting it right may fall to you.
Your questions about new build mastic in North End
Do you work for landlords with property near Kensington Olympia station?
Yes. We work for letting agents and landlords as well as householders, and several properties can go on one quote. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Is parking a problem for a job in North End?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Are you fully insured?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few photos.
Do you work through snagging lists?
Yes. Send it with pictures and we’ll quote for the sealant items. Items that need a plumber, tiler or the builder are flagged.
Will the old sealant be removed?
Always. Sealing over old sealant is the main reason resealing fails early, so we never do it.
Should I go to my builder first?
Report it to the builder first while you’re covered. Once that’s done, or if they will not put it right, we can reseal it properly.
Do I have to be there?
Access is agreed with you when the job is booked. Indoors, that normally means someone at home.
Joints and finishes in North End homes
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent.
If you’ve bought a new home near Kensington Olympia station, the sealant around baths, showers and frames is worth checking in the first year or two.
North End is about 1 mile south of Kensington, in Greater London. North End gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. North End is one of 764 places in Greater London where we work.
Here we cover the W14, SW6 and SW5 postcode area for new build mastic. If you need new build mastic at a property on Sun Road, Star Road and Field Road or a nearby road, we can help. We also cover the places around North End: West Kensington (1 mile east), Brook Green (1 mile north-west), Fulham (1 mile south), Hammersmith (1 mile west) and Brackenbury Village (1 mile north-west). Further out, we also cover London (5 miles east), City of Westminster (3 miles north-east), Marylebone (3 miles north-east), St Pancras (5 miles north-east), Shoreditch (6 miles north-east) and Walthamstow (10 miles north-east).
Around North End
We work in homes and buildings around Seven Stars pub, Polish Library POSK in London and Avonmore Primary School. The nearest railway station is Kensington Olympia station, roughly 0.5 miles north of the centre. A little further out are Hammersmith Broadway (0.7 miles west) and Montfichet's Tower (4.8 miles east). Green spaces nearby include WWT London Wetland Centre and Campden Hill.
For landlords and businesses
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured for the work.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Honest limits
We will always be straight with you, so here’s what sealant cannot fix:
- Movement caused by a poorly fitted tray or bath
- Structural cracks in walls or ceilings
- Your warranty claim itself, which is between you and the builder
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly before you book.
Joints and surfaces we work on
- Kitchens
- Bathrooms & en suites
- Windows & doors
- Show homes
- Plot handovers
- Skirting & floors
Leave it or put it right?
It often makes sense to do all the sealant items on a snagging list together. It’s one visit, one quote and one set of cure times. In a flat in North End, 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.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
What you get with us
- 180+ five-star Google reviews
- An ARBOMaster approved applicator
- Tidy, careful work
- You choose the colour before work begins