Greater London · England
New Build Mastic in Fortune Green
Problem with your new-build sealant joints in Fortune Green? We remove the old material, prepare the joints and seal them properly, with a one-year guarantee.
- Gaps between new skirting and floors
- Messy sealant that spoils new finishes
- Sealant that never bonded to the surface
New build mastic for homes and businesses in Fortune Green
Developers send us the plot schedule and we work through it. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over with a sealant suited to each area. Common call-outs are for plot mastic for developers ahead of handover and gaps between new skirting and floors, across skirting & floors, plot handovers and bathrooms & en suites.
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, in Fortune Green and beyond.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Where
- Fortune Green (NW3, NW6, NW2)
- Region
- Greater London
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Landlord and commercial work in Fortune Green
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
Different surfaces, different methods
Plot handovers
We work through plots to your schedule, sealing each room ready for handover. Each joint is cleaned and primed where needed so the sealant lasts.
Kitchens
Sink joints are wet all the time. We use a sealant suited to kitchens.
Why it’s worth doing now in Fortune Green
If you are still in the builder’s snagging or warranty period, ask them to put it right first. If it’s slow, or the same joint keeps failing, a proper reseal from a specialist is the next step. 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.
Combining jobs into one visit is generally more efficient than separate visits. We’ll give you a clear price for the lot.
Why us?
- More than 20 years in sealant work
- Approved under the ARBOMaster scheme
- Sealant colour chosen to suit
- You choose the colour before work begins
Read what affects the cost or what customers say.
Aftercare tips
After the cure time, these simple habits help:
- Watch for new gaps as the house dries out
- Follow the cure time we give you
- Don’t wait for the house to settle if water is getting through
- Do not seal over failed sealant yourself
Watch the joints as the house settles. Hairline gaps can open as timber and plaster dry and can be resealed later.
Report failed sealant to the builder while you are in the snagging period. Once it ends, the repair may be down to you, so raise it early.
What new build mastic looks like in Fortune Green
Many of London’s new homes are flats in bigger developments, where snags may need reporting through the developer or the 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.
If you’ve bought a new home near West Hampstead Thameslink station, the sealant around baths, showers and frames is worth checking in the first year or two. As a London address, Fortune Green can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Fortune Green is about 1 mile west of Hampstead, in Greater London. Homes, rented property, offices and hotels in Fortune Green can book us for new build mastic, old or new, large or small. Every job comes with our 12-month guarantee. Fortune Green is one of 764 towns and villages in Greater London we cover. You can also see our page for London, about 6 miles away.
Every address in NW3, NW6 and NW2 is within our area for new build mastic, from the main roads to the quietest streets. You will find streets such as Mill Lane, Ajax Road and Sarre Road, all of which we cover. Other places close to Fortune Green include West Hampstead (1 mile east), Childs Hill (1 mile north), Hampstead (1 mile east), Greenhill (1 mile east) and Vale of Health (1 mile north-east). Further out, we also cover London (6 miles south-east), City of Westminster (3 miles south-east), Marylebone (3 miles south-east), Kensington (4 miles south), St Pancras (4 miles south-east) and Shoreditch (5 miles east).
Near you in Fortune Green
Typical jobs here are in homes near Holly Bush pub, St Vedasts School For Boys and Kilburn Grange Park and the streets around them. For rail, the closest station is West Hampstead Thameslink station, about 0.5 miles south of the centre. Nearby you will also find Montfichet's Tower (4.9 miles south-east) and O2 Centre (0.8 miles south-east). Green spaces nearby include The Long Water and Westbere Copse.
What affects the quote in Fortune Green
We don’t publish a price list. The quote depends on:
- The amount of work
- The old material and how stubborn it is
- The product the joint needs
- Working hours on commercial sites
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or email us and we’ll talk you through it.
Asking for a quote
When you contact us, these details help:
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- The address or postcode of the job
- Whether it has been sealed before
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
FAQs for Fortune Green
Can parking be tricky for a visit in Fortune Green?
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.
I let a flat near West Hampstead Thameslink station. Can you help?
Yes. We work for landlords and letting agents as well as homeowners. You can call 0345 464 0079 or send us an email with the details for a clear quote.
Can you work on commercial sites?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Why does sealant fail so quickly in new builds?
A new house dries and settles for a year or two, and sealant is often applied quickly onto dusty surfaces. Either can make it fail early.
How long should I leave it?
Different products cure at different speeds, so please follow the time we give you.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator.
Do I need to be at home?
We need access to the joints, so we’ll agree that with you when we book. Indoors, that normally means someone at home.
Do you take on second-fix sealing for builders?
Yes. Plot mastic and second-fix sealing for developers is part of our work. Send us the plot schedule and we’ll quote.
Places near Fortune Green
Other services in Fortune Green
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
What we do, step by step
When we arrive, we look over the joints with you first. We protect the surfaces around the joints before any work begins. Most jobs take a few hours in a single home. For a job in Fortune Green, parking and access are the things to plan: let us know about parking, the floor we will 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.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
How to prepare
- Keep children and pets away from the work area
- Mention any parking rules near the property
- Tell us about any water getting in
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. Whenever you’re ready, phone 0345 464 0079 or drop us an email.