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

Cricklewood facade sealing

Facade joint and window perimeter sealing on commercial buildings throughout Cricklewood and nearby, by CSCS-carded applicators. Fully insured and CHAS accredited.

  • Damp patches beside frames after rain
  • Staining on stone next to old sealant
  • Old perimeter mastic that has dried out
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Need facade sealing in Cricklewood?

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

Common problems we fix in Cricklewood

The wrong product causes its share of trouble: acetoxy-cure silicone may mark stone or corrode certain metals, and an interior product won’t last outdoors. Neutral-cure, facade-grade products are what most external joints need.

What tends to prompt an enquiry:

  • Perimeter sealant that has split or peeled away
  • Old perimeter mastic that has dried out
  • New sealant peeling off old mastic
  • Staining on stone next to old sealant

Projects at colleges like College of North West London (1.2 miles west of Cricklewood) tend to run to term dates, so the mastic is planned tightly.

What your quote should include

  • Will CSCS-carded applicators be on site?
  • Their approach to joint depth and backing
  • How they’ll work around occupants
  • Do they follow the manufacturer’s priming guidance?

How to choose a sealant contractor

Facade sealing for commercial buildings in Cricklewood

We don’t install glazing systems or replace glass. We handle the sealant joints that surround those elements: the frame-to-structure perimeter, panel-to-panel joints and window and door surrounds with products suited to facade or glazing perimeter joints. We work on window and door perimeters, perimeter joints where frames meet the structure and stone and brick facade joints, and what we are called in for most is facade joints cracked through the middle and cladding panel joints that have opened up. Most enquiries from Cricklewood start with one failed joint and grow into a wider look at the building: we look at the rest while we are there and tell you what we find.

Around Cricklewood, as across London, much of the work is refurbishing existing buildings as well as building new ones. New frames, overcladding and fit-outs all end in perimeter and facade joints, frequently with occupants close by, so tidy, well-planned work matters.

The 12-month guarantee covers our workmanship: preparation, application and finish. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.

Place
Cricklewood (NW2, NW6, NW10)
Region
Greater London
Cover
12 months on our workmanship
Price
Fixed quote, scope in writing
Call
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Our process

We follow your site rules from the start: signing in, inductions and any permit to work. Once we’re cleared to begin, the joints are worked through in the order agreed with your site contact. Planning a London job such as one in Cricklewood 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.

  1. Access, site rules and timing are settled with the client up front.
  2. Weather and temperature are checked against the product’s limits.
  3. Each joint is cut out and the edges inspected.
  4. Joints are cleaned, primed if required and fitted with backing rod.
  5. Sealant is gunned in and tooled hard onto both faces.
  6. We hand over with our 12-month workmanship guarantee.

What we need from you

  • Let building users know which areas are affected
  • Share your working hours and any access restrictions
  • Clear stock, furniture or equipment away from the joints

Ask for a quote

Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to speak to us on 01277 525 020 or email the details over with what you know.

Ask for a quote

Read more

Surface by surface

Window and door perimeters

Frame materials vary, and so does the preparation. Primer goes on where the manufacturer specifies it for that substrate.

Render and coated surfaces

Rendered and painted facades need a sound edge for the sealant to bond to. Loose coatings are cleaned back first.

Mastic packages on Cricklewood sites

A 2-mile radius around Cricklewood takes in a good number of hotels. When hotels extend or refit, the work is normally squeezed between peak periods, mastic included. Site traffic in Cricklewood falls within London’s ULEZ, like everywhere else in Greater London. Delivery slots and scarce storage shape how and when the mastic goes in.

New units and refits on sites such as The Quadrant Business Centre, 1.1 miles to the south-east of Cricklewood, need their panel and perimeter joints sealed to the specification. Hotels like The Crown Moran Hotel, under half a mile to the north-east of Cricklewood, rarely close for long, so refurbishment mastic is phased floor by floor.

Cricklewood is about 1 mile north-west of Kilburn, in Greater London. We send applicators to Cricklewood for facade joints. Our Greater London coverage takes in 764 places, from busy centres to rural villages. Our London page has more on work in that area, about 7 miles away.

Commercial sites across NW2, NW6 and NW10 are covered. Buildings on Ivy Road, Walm Lane and Dean Road are within our area. Main routes into Cricklewood include the A407. We also cover Brondesbury (1 mile south-east), Willesden (1 mile south-west), Dollis Hill (1 mile north-west), Willesden Green (1 mile south-west) and Neasden (1 mile west) for facade joints. Further afield, our area takes in London (7 miles south-east), City of Westminster (4 miles south-east), Marylebone (4 miles south-east), Kensington (4 miles south), St Pancras (5 miles south-east) and Shoreditch (6 miles east).

Landmarks near Cricklewood

Recent enquiries here include premises near Hampstead School, The Crown Public House and Gladstone Park and the streets around them. Cricklewood has its own railway station: Cricklewood station. Nearby you’ll also find St Andrew's Hospital (0.8 miles north-west) and Brent Museum and Archives (0.7 miles south-west). For a walk, there’s Parliament Hill and Westbere Copse.

Map of Cricklewood © OpenStreetMap contributors

General trades versus a specialist

General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class, which is what makes a joint last.

A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.

For managing agents and facilities managers

Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Sites in Cricklewood can sit alongside others in a wider programme.

Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.

When something else is needed

A few problems need another trade or a different fix, and we say so rather than covering them up:

  • Damaged frames that need replacing
  • Damp caused by condensation inside the building
  • Installing or repairing glazing systems

If in doubt, give us a call on 01277 525 020 or email us and we’ll say what we think.

What we seal

  • Cladding panel joints
  • Stone and brick facade joints
  • Shopfront frames
  • Coping and flashing joints
  • Perimeter joints where frames meet the structure
  • Window and door perimeters

Questions about Cricklewood

Will you plan work around the academic year at somewhere like Imperial College London?

Yes. We plan campus work around teaching, exams and residence turnarounds. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.

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

Yes. Inductions, permits and timed loading are routine for us in London. 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

Is it fine to apply new sealant on top of old?

No. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.

How many days will you need on site?

That varies with the scale of the job, though a typical visit normally takes longer on a full elevation than on a handful of window perimeters, and it always depends on dry weather. Larger or phased jobs take longer, and we will give you a timescale with the quote.

Should we check old sealant for asbestos?

In older non-domestic buildings, old sealant can contain asbestos. Check the asbestos register or survey before it is disturbed; if it’s suspected, work stops until it has been tested. Removal of asbestos isn’t something we do.

How soon can the area be used again?

The product and site conditions decide that. Some products skin over quickly but need longer to cure fully, and we confirm it before leaving site.

Is any job too small?

Single areas, one-off repairs and whole buildings are all quoted the same way: send details, get a fixed quote, we seal, guaranteed.

Accreditations

Trusted. Accredited. Insured.