The Mastic Doctor team standing beside their branded vans outside an office building
Greater London · England

Expansion joint sealing in Fortune Green

Need expansion joint sealing in Fortune Green? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.

  • Expansion joints filled with dirt and stones
  • Movement joints with split or torn sealant
  • Sealant peeling off one face of the joint
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
Constructionline member
£5m public liability

Expansion joint sealing in Fortune Green

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Expansion joint sealing in Fortune Green, done properly

Width, depth and product all have to work together. The joint has to be wide enough for the expected movement and the sealant’s movement capability, and depth is controlled using closed-cell backing rod, or bond-breaker tape in shallow joints. For wider joints, the width-to-depth ratio is often around 2:1, as the manufacturer advises. Site teams most often ask us about brittle, chalky sealant on external joints and joints where the bead has lost adhesion, on car park decks and ramps, cladding panel joints and precast concrete panel joints. One point of contact handles commercial sealant work in Fortune Green from the first photographs to the final walk-round, whether it’s one building or several.

Areas such as a loading bay or car park deck in Fortune Green normally have to stay in use. We work through joints a section at a time, closing small areas in turn.

The 12-month guarantee is for workmanship rather than wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we spell out the cover before we begin.

Where
Fortune Green (NW3, NW6, NW2)
Wider area
Greater London
Guarantee
12 months on our workmanship
Quote
Fixed quote, scope in writing
Telephone
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Honest limits

We seal joints; we don’t mend everything behind them. On its own, sealant can’t deal with:

  • Broken or spalled joint edges, which need repairing before any sealant goes in
  • Proprietary pre-formed expansion joint systems
  • A joint that has to be widened or re-detailed before it can work

If you are not sure, just ring 01277 525 020 or email drawings and photos and we will give you a straight answer.

Joints and surfaces we work on

  • Blockwork control joints
  • Podiums and floor movement joints
  • Car park decks and ramps
  • Cladding panel joints
  • Precast concrete panel joints
  • Brickwork movement joints

Common questions from Fortune Green clients

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. Send the building rules and access times with your enquiry. The ULEZ covers the whole of Greater London, which we allow for

Is The Quadrant Business Centre, near Fortune Green, within your area?

Yes, sites like The Quadrant Business Centre are within our area, along with the rest of Fortune Green. Send details of the unit and the work through our quote form for a quick quote.

Are you CHAS accredited and on Constructionline?

Yes. We are CHAS accredited, we are a Constructionline member and we use CSCS-carded applicators.

What guarantee do you give on joint sealing?

It’s backed by our 12-month guarantee. Tell us right away if a joint we sealed gives trouble in that time.

Is colour matching possible?

That depends on the product specified. Some ranges are wide, others limited, so the available colours are confirmed with the quote.

How long before the joints can be used?

The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.

What timescale should we allow for resealing expansion joints?

Allow a few hours to several weeks, depending on how many metres of joint there are and how much old sealant or filler needs removing. Timings are set out in the quote.

Surface by surface

Concrete and precast panel joints

Precast panels often have surface residues that sealant won’t bond to. Proper cleaning and primer where specified give a sound bond and check the edges for soundness as we go.

Car park decks and ramps

Failed deck joints often show as leaks on the level below. The old seal comes out, the edges are prepared and the joint resealed, and we will tell you if any edges need repairing first.

After the work

A few simple habits keep the new joints working:

  • Keep traffic off new joints until the cure time is up
  • Keep stones and debris out of open joint lines
  • Plan racking layouts so feet don’t land on a joint
  • Raise snow-clearing blades over deck joints where possible

Every joint we seal is backed by a 12-month guarantee on workmanship. Record which product went into which joints in the building file.

Joints sealed at the same time generally fail around the same time. Inspecting the whole run is worth the effort so you can prioritise and budget. We can suggest an order, worst joints first.

What sets the cost

Your fixed quote is built from the real scope. It takes account of:

  • Which sealant the job calls for
  • Any access equipment needed
  • Whether the work must be split into stages
  • Travel to remote or island sites

Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.

Sending details for a quote

Whether it’s one area or a whole building, the same details help:

  • Drawings or a marked-up plan, if available
  • What the building is and how it’s used
  • The product your specification calls for
  • How the joints are reached, and at what height

Photos, drawings or a schedule of the joints are often enough for a fixed quote. Where a site visit makes more sense, we’ll arrange one.

Expansion joint sealing in Fortune Green: the local picture

The 3 miles around Fortune Green take in at least three named trading estates, business parks or retail parks. Floors, loading bays and yards on sites like these are where floor and movement joints work hardest. In London, decks, bays and service yards normally have to keep running, so the work is broken into short sections agreed with the building manager.

For a centre such as O2 Centre (0.8 miles south-east of Fortune Green), the service yard and car park joints normally need attention first. At places like Brent Cross Shopping Park, 1.7 miles north-west of Fortune Green, joints are sealed a section at a time so operations carry on. University campuses such as Regent's University London, 2.7 miles to the south-east of Fortune Green, have car parks, paved walkways and building elevations with movement joints.

Fortune Green is about 1 mile west of Hampstead, in Greater London. We cover commercial sites throughout Fortune Green, whether it’s a single job or part of a planned programme. We work across 764 places in Greater London, from busy centres to rural villages. Sites around London have their own page, roughly 6 miles from Fortune Green.

We cover the NW3, NW6 and NW2 postcode districts for movement joints. Streets here include Mill Lane, Ajax Road and Sarre Road. Close to Fortune Green, our area also takes in 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). Bigger towns within reach 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).

Local landmarks in 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. The closest station to Fortune Green is West Hampstead Thameslink station, about 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). Green spaces nearby include The Long Water and Westbere Copse.

Map of Fortune Green © OpenStreetMap contributors

Doing it in-house

Using site staff can make sense for a small touch-up, but anything bigger is another matter: a specialist brings efficiency, a consistent finish and a 12-month guarantee.

A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

Our process

Tell us your site hours and access windows and we’ll plan around them. On the day, the work area is kept contained and tidy, and we check in with your contact before moving on to each new area. In Fortune Green, most buildings stay in use during the work, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.

  1. First, the joints are inspected for width, movement and the type of failure.
  2. Next, we fix a price and confirm the sealant we propose for the movement.
  3. Old sealant and filler are cut out and the joint faces cleaned back to sound material, flagging any broken edges that need repair before sealing.
  4. We control the depth with backing rod or, in shallow joints, bond-breaker tape.
  5. After any primer the maker requires, the bead is applied and tooled so it grips two sides only.
  6. We check every joint before sign-off, and the work carries our 12-month guarantee.

What we need from you

  • Explain the parking and delivery arrangements
  • Let us know about inductions and permits
  • Send asbestos survey details if the building is pre-2000

Get a fixed quote

For a fixed quote, speak to us on 01277 525 020 or email drawings and photos. Our quote form is another easy route.

Ask for a quote

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