Mastic sealant contractors in Fortune Green
Mastic sealing for building owners, managing agents and housing associations in Fortune Green and across Greater London. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Worn sealant at communal door frames
- Draughts at frames across a block
- Water getting in round frames after rain
Need mastic sealing in Fortune Green?
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
What sealant work can’t fix
Honesty saves time and money. Fresh joints won’t solve:
- Substrate edges that need repairing first
- Failed window or door frames, which need a window contractor
- Water coming in from the roof or rainwater goods
Not sure which it is? You can call the office on 01277 525 020 or email us and we will tell you honestly before you book.
Surfaces we seal
- Window and door perimeters on blocks
- External wall and movement joints
- Communal entrances and stairwells
- Balcony and threshold joints
- Shopfronts below residential blocks
- Communal kitchens and washrooms
How we handle mastic sealing in Fortune Green
Our clients include managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios. Many prefer a planned programme to one-off visits and we quote and schedule each building in turn. If you are dealing with old repairs sealed over failed mastic and the same joint failures repeated across a portfolio, we can help, whatever the surface. Whether you call it commercial sealant work, mastic application or joint sealing, in Fortune Green it comes down to the same thing: the right product in a properly prepared joint.
In a London area such as Fortune Green, many buildings are blocks of flats or mixed-use buildings run by managing agents, landlords or housing associations. Mastic around windows, doors and balconies tends to fail across a whole block at a similar time, which is why block-wide programmes make sense.
We sign every job off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.
- Location
- Fortune Green (NW3, NW6, NW2)
- Wider area
- Greater London
- Cover
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Do you need mastic sealing in Fortune Green?
UV and rain age external sealant. It stiffens, stops stretching and cracks, especially on south and west faces.
These are often picked up first by site or facilities staff:
- Damp patches beside frames
- Estate-wide sealant that is simply worn out
- Worn sealant at communal door frames
- Patchy repairs in mismatched sealant
Site managers at schools like St Luke's Church of England School can fit frame mastic into the summer works.
What your quote should include
- Their pre-qualification and accreditations
- Whether old or failed sealant will be cut out, not overlaid
- Their approach to joint depth and backing
- Whether primer will be used where the manufacturer specifies it
How a job runs
Inspect, seal, sign off: that’s the shape of every visit. We inspect the joints and confirm what’s in scope, then the work is carried out to the specified product and detail, and we finish with a walk round so the work can be signed off. Planning a London job such as one in Fortune Green starts with access: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Give us the hours we can be on site and we will schedule to suit.
- First we look at the mastic on each building and note what needs replacing.
- A fixed quote follows, split by block or building if that suits you.
- Dates, areas and access are agreed so residents or tenants can be told in advance.
- Old sealant is stripped and each face prepared back to firm material.
- Backing rod and primer go in where the joint and the product need them, then new sealant is applied and tooled.
- Each building is checked on completion and the work carries our 12-month guarantee.
What we need from you
- Send your site hours and access windows
- Tell us what induction or permit system the site runs
- Move anything stored against the joints
Request a quote
The quickest route to a quote is a few photos and the site postcode. Upload them with the quote form, or give us a call on 01277 525 020 or email drawings and photos if you’d rather talk the job through.
Advice
Fortune Green: questions and answers
Will you take on a block within reach of West Hampstead Thameslink station?
Yes, we work for agents, landlords and housing associations with blocks of every size. Give us the building’s details and say how residents are notified, and we will quote and plan to suit.
Can you work in a London building with booked loading and goods-lift slots?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. Say when the building is occupied and when it’s quiet, and we will plan accordingly. All of Greater London is inside the ULEZ, and our planning allows for it
Which sealant will you use?
A specification, where there is one, decides it. Without one, the joint decides: its movement, its surfaces and what it has to cope with.
What guarantee do you give on resealing?
There is a 12-month guarantee on our workmanship, backed by public liability insurance.
Is it fine to apply new sealant on top of old?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, since fresh sealant will not bond reliably to aged material.
Can you follow the specification on our project?
Yes. Send it with your enquiry, and we will price the work to it.
Do you work for managing agents and housing associations?
Yes. Most of our mastic sealing is for agents, factors, housing associations and portfolio landlords, and we quote building by building or as a programme.
For owners and agents in Fortune Green
Fortune Green has four care or nursing homes no more than 2 miles away. Frame mastic on care buildings is best renewed elevation by elevation, with the manager deciding timings. For a London block, the agent or landlord normally handles notices to residents and access to flats. Our programme follows the access you agree with residents.
Older community buildings, Church of St Luke among them, often have frames of mixed ages whose mastic varies. Landlords with units on estates such as The Quadrant Business Centre (to the south-west of Fortune Green) can bring frame, door and external mastic across several units into one programme.
Fortune Green is about 1 mile west of Hampstead, in Greater London. Any commercial site in Fortune Green is covered. Our Greater London coverage takes in 764 places, large and small. There’s a separate page for London, roughly 6 miles from Fortune Green.
Business premises anywhere in NW3, NW6 and NW2 are within our area for mastic joints. Among the streets we cover are Mill Lane, Ajax Road and Sarre Road. If your building is just outside Fortune Green, we cover 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). Nearby towns on our patch include 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).
What’s near Fortune Green
Around Fortune Green, our work takes us to commercial buildings near Holly Bush pub, St Vedasts School For Boys and Kilburn Grange Park, among other places. For rail, the closest station is West Hampstead Thameslink station, roughly 0.5 miles south of the centre. A little further out are Montfichet's Tower (4.9 miles south-east) and O2 Centre (0.8 miles south-east). Open spaces near Fortune Green include The Long Water and Westbere Copse.
Maintenance after handover
Problems stay small when the joints are checked regularly. Specifically:
- Check the asbestos register before any old mastic is disturbed
- Reduce knocks to communal area joints
- Group repairs into a planned programme
- Check sealant joints during planned building inspections
Our workmanship is covered for 12 months, so report any failure in that time. Beyond that, routine checks spot the next round of repairs.
Joints on a building age together so a single failure is a sign to check the rest. Doing them together saves going back again and again.
Why act early in Fortune Green
Reacting to every complaint means sending someone out block by block. A planned programme treats each building once and is simpler to manage and budget. In a London building, a failed joint rarely affects only one party: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.
The product called for affects the cost, and so does the preparation, such as cutting out, priming or new backing rod. Access, phasing and site rules also count.
What you get with us
- Coloured sealants to suit the setting, where available
- One number for every site we cover
- Fully insured
- Commercial sealant work since 2005
See how commercial sealant jobs are priced and how we’re accredited.
Nearby places to Fortune Green
Also in Fortune Green
Building owners, agents and FMs in Fortune Green
Housing associations and managing agents often need work done across blocks and communal areas. We phase the work so people keep access, and each stage is agreed with your contact.
Hospitality, education, healthcare, office and retail clients book us directly too. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.