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

Mastic sealing for building owners and managing agents in North End, Greater London

Mastic sealing for building owners, managing agents and housing associations across North End, by CSCS-carded applicators. Fully insured and CHAS accredited.

  • Damp patches beside frames
  • Communal area joints that look neglected
  • A mix of products and colours from past repairs
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
CHAS & Constructionline
£5m public liability

Mastic sealing for North End sites

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Keeping the joints sound

Keep the joints in good shape with a few simple steps:

  • Keep bins and bikes away from communal door frames
  • Encourage occupiers to report problems at frames
  • Make mastic part of routine maintenance checks
  • Plan resealing building by building rather than complaint by complaint

Ask residents or tenants to report draughts or leaks round windows early. A quick report keeps a small repair small.

Budgets are easier to plan when sealant is part of planned maintenance. A programme can start with the worst buildings so spending is spread.

Mastic sealing in North End

On a residential block, the work happens around people’s lives. The sequence, the areas and the dates are settled with you so you can let residents know what is happening. Communal entrances and stairs stay usable throughout. We work on external wall and movement joints, balcony and threshold joints and shopfronts below residential blocks, and what we’re called in for most is draughts at frames across a block and window mastic that has split and shrunk. One point of contact handles commercial sealant work in North End from the first photos to the final walk-round, whether it’s one building or several.

London’s ULEZ covers every borough, and parking and loading rules vary street by street. For block-wide work, a place to park and store materials saves time on every visit.

Building owners and contractors get the same cover: twelve months on the work we carried out. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.

Location
North End (W14, SW6, SW5)
Region
Greater London
Cover
12 months on our workmanship
Quotes
A fixed quote before we start
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

How a job runs

We schedule the visit to fit the site hours and access windows you give us. On the day, the work area is kept contained and tidy, and your contact hears from us before we move to the next area. For a job in North End, access comes first. Give us the hours we can be on site and we will schedule to suit.

  1. A building-by-building inspection lists the failed joints.
  2. You get a fixed quote, per block or for the whole programme.
  3. Dates and areas are agreed so occupiers can be told.
  4. Failed sealant is removed and the faces prepared.
  5. Joints are resealed and tooled.
  6. We check the finished work and confirm the guarantee.

Getting the site ready

  • Point out parking and an unloading spot
  • Move anything stored against the joints
  • Let us know about inductions and permits

Getting a fixed quote

To get a fixed quote, phone 01277 525 020 or email us with the site address and an outline of the work. Our quote form is another easy route.

Ask for a quote

Related advice

Common questions from North End clients

Do you take on jobs in North End where loading and access are tightly controlled?

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.

Will you take on a block within reach of Kensington Olympia station?

Yes, we work for agents, landlords and housing associations with blocks of every size. Send the address, photographs of the elevations and your access arrangements, and we’ll give a fixed quote.

How do you handle work on occupied blocks?

The work is planned around occupiers. Dates and areas are agreed with you so residents or tenants can be told, and entrances stay in use.

How long before the joints can be used?

We will confirm how long the chosen product needs to cure, and sign any area that should be left alone.

Who decides which product is used?

Where there’s a specification, we use the product it names. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.

Can you follow the specification on our project?

Yes. The specification and the manufacturer’s installation guidance are what we work to, and we raise anything unclear before work begins.

What if the old mastic contains asbestos?

We don’t remove asbestos-containing materials. If old sealant is suspected, work stops until it’s tested, and the duty to manage asbestos sits with the dutyholder.

Leave it or put it right?

Piecemeal repairs over the years often leave mismatched sealant. Resealing a whole building gives a consistent finish. Access in London is hard enough to arrange once, so while access is arranged it pays to renew all failing joints, not just the worst.

The price depends on the quantity of joints, how much old material needs removing and how the joints are reached. Call for a fixed quote once you have the details.

Why clients in North End choose us

  • Old sealant cut out, never sealed over
  • One number for every site we cover
  • 12-month guarantee on workmanship
  • Fully insured, including public liability cover

See our cost guide and our accreditations and insurance.

Blocks and managed buildings in North End

For a London block, the agent or landlord typically handles notices to residents and access to flats. Our programme follows the access you agree with residents.

Schools and community buildings such as The Fulham Boys School need frame and external mastic kept sound like any building. For owners of several units at places like Berghem Mews Business Village, which lies north-west of North End, one programme can deal with frame and external mastic across the lot. If you’re responsible for a building such as St. Andrew's Fulham Fields, frame and door mastic needs the same attention as any other property.

North End is about 1 mile south of Kensington, in Greater London. Commercial clients in North End use us for work on mastic joints. Our Greater London coverage takes in 764 places, large and small.

Postcode districts covered here: W14, SW6 and SW5 for mastic joints. Among the streets we cover are Sun Road, Star Road and Field Road. Nearby places we also cover include 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). A short drive away, we 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).

What’s near North End

We work on buildings around Seven Stars pub, Polish Library POSK in London and Avonmore Primary School. The closest station to North End is Kensington Olympia station, about 0.5 miles north of the centre. Nearby you’ll also find Hammersmith Broadway (0.7 miles west) and Montfichet's Tower (4.8 miles east). The countryside around North End includes WWT London Wetland Centre and Campden Hill.

Map of North End © OpenStreetMap contributors

How the quote is worked out

Quotes vary with the job. It mainly depends on:

  • Specialist products, such as fire-rated or hygienic sealants
  • Phasing around occupants
  • The site’s rules and procedures
  • Removal of failed or old sealant

Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote, and you will have a fixed figure to work with.

Details that help us quote

There’s no need for a formal survey. A few details are enough to get going:

  • Whether an asbestos survey exists
  • Your programme or deadline
  • Drawings or a marked-up plan, if available
  • Access details, including height

Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. For a chat about it beforehand, ring 01277 525 020 or email drawings and photos.

For managing agents and facilities managers

CHAS accredited and a Constructionline member, we are straightforward to vet for your supplier list. Our insurance certificate can be sent along with the quote.

Hotels, schools, healthcare sites, offices and retail units come to us directly as well. We plan around the way the building is used, so the building keeps working while we do.

How the job changes by surface

Planned maintenance

How long mastic lasts depends on exposure, movement and the product used. Inspecting joints regularly keeps programmes on track.

Window and door perimeters on blocks

We typically work through a block’s windows in a planned order. Access is agreed with you before the quote is fixed.

Accreditations

Trusted. Accredited. Insured.