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

Facade and window perimeter sealing in Farringdon, Greater London

Commercial sealant work in Farringdon for contractors, FMs and building owners: facade joint and window perimeter sealing on commercial buildings, quoted at a fixed price.

  • Weathered joints at frame-to-structure perimeters
  • Weathered facade joints that have lost their grip
  • Air leaks through failed facade joints
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Signed off, with 12 months’ guarantee.
South East, London & Scotland
CHAS accredited
£5m PL insurance

Facade sealing near Farringdon

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

How we handle facade sealing in Farringdon

We seal window and door perimeters, cladding panel joints, external facade joints and perimeter joints where frames meet the structure for clients around Farringdon. Where sealant is the specified fix, we also take on coping and flashing joints. We work on cladding panel joints, shopfront frames and coping and flashing joints, and the usual reasons a site gets in touch are staining on stone next to old sealant and cold air coming in at window perimeters. Looking for mastic applicators who cover Farringdon? We’ve been sealing commercial buildings since 2005.

Every London site, Farringdon included, is inside the ULEZ, which applies to deliveries and contractors’ vans alike. Alongside that, sites typically need booked deliveries and a plan for where materials go.

We stand behind the joints we seal: 12 months, guaranteed. That covers our preparation and application, and we come back if anything isn’t right.

The Mastic Doctor team standing beside their branded vans outside an office building
Location
Farringdon (EC1V, EC1R, EC1P)
Region
Greater London
Cover
A 12-month guarantee
Quote
Fixed quote, scope in writing
Call
01277 525 020
Last updated
3 November 2026

Why deal with it now?

Topping up a failed joint usually buys very little time. A full cut-out and fresh bead is the repair that holds. In Farringdon, each extra visit means more notices, permits and disruption, so cutting the old sealant out fully and doing it right once is the better route.

The price depends on the quantity of joints, what has to come out first and the access. Call for a fixed quote once you have the details.

Why appoint us

  • One phone line for London, the South East and Scotland
  • Coloured sealants to suit the setting, where available
  • Colour agreed before work starts
  • Health and safety: CHAS accredited

Read what affects the cost and our accreditations.

What we are called out for in Farringdon

Sun, rain and temperature swings wear facade sealant down over the years. The bead hardens, chalks on the surface and loses the flexibility to follow the joint, then it splits or peels.

Things that typically lead to an enquiry:

  • Air leaks through failed facade joints
  • Patch repairs that keep failing
  • Weathered joints at frame-to-structure perimeters
  • Old perimeter mastic that has dried out

On a campus such as Queen Mary's University West Smithfield Campus, which lies south-east of Farringdon, new teaching buildings and residences are normally built and refurbished around the academic year.

Comparing quotes

  • Will RAMS and insurance details be available?
  • How long is the guarantee, and what does it include?
  • Whether primer will be used where the manufacturer specifies it
  • Whether their applicators hold CSCS cards

Choosing a commercial sealant contractor

Building owners, agents and FMs in Farringdon

Building owners and managing agents use us on everything from one building to a spread of sites. Several sites can go on one quote, so there’s one set of paperwork to deal with.

Main contractors use us as their sealant subcontractor. Programme, specification and site rules come first.

Different surfaces, different methods

Coping and flashing joints

Not every coping or flashing leak is a sealant problem. Where the issue isn’t the sealant, we say so.

Precast concrete panels

Precast panel joints have to absorb thermal and structural movement. We use a sealant with the right movement capability, set over backing rod.

Sites and facades in and around Farringdon

A good number of hotels sit less than 2 miles from Farringdon. Hotel extensions and refits usually have to fit around bookings, so mastic dates are tight. Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in Farringdon. Add booked deliveries and tight storage, and the mastic package needs planning with the site team.

On a healthcare site such as St Bartholomew's Hospital, which lies south-east of Farringdon, new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully. When units on a site such as Grand Vitesse Industrial Estate (to the south of Farringdon) are refurbished or reclad, the panel joints and window perimeters are part of the mastic package.

Farringdon is about 2 miles north of London, in Greater London. Looking for facade sealing in Farringdon? We can help, as we do across Greater London. 764 places across Greater London fall within our area, including Farringdon.

Work on facade joints is covered throughout EC1V, EC1R and EC1P. If your site is on Oat Lane, Shoe Lane and Long Lane or close by, we can quote for facade joints. You will find Farringdon on or near the A1 and A4. Nearby places we also cover include Smithfield (1 mile south), Clerkenwell (1 mile north), Holborn (1 mile west), Blackfriars (1 mile south) and Temple Bar (1 mile south-west). Nearby towns on our patch include Kensington (4 miles west), Walthamstow (6 miles north-east), Hampstead (4 miles north-west), Ruislip (14 miles west), Brompton (3 miles south-west) and Stockwell (4 miles south).

Near you in Farringdon

Recent enquiries here include premises near The Castle Public House, St Mary-at-Hill and Barts Health Archives, among other places. Other local landmarks include St Peter and St Paul RC Primary School (under half a mile north), Barbican Conservatory (under half a mile east) and Central Foundation Boys' School (0.8 miles east). There’s a railway station in Farringdon itself: Farringdon station. Nearby you will also find Museum of the Order of St John (under half a mile north-east) and Gabriel's Wharf (0.9 miles south). The countryside around Farringdon includes Ludgate Hill and Barnsbury Wood.

Map of Farringdon © OpenStreetMap contributors

Farringdon: questions and answers

Do you take on work at healthcare sites like St Bartholomew's Hospital?

Yes. Healthcare sites are among the places we work. Work is phased so departments keep running, under the site’s own rules.

Do you work in London buildings with loading restrictions?

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’ll plan accordingly. All of Greater London is inside the ULEZ, and our planning allows for it

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.

What will the job cost?

That depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a fixed quote.

Do you take on multi-site work?

Yes. We take on portfolio and planned maintenance work, with each site phased to suit its occupants.

How do I request a quote?

The quote form is the simplest route, though you can also call the office on 01277 525 020 or email drawings and photos. Include photos or drawings if you have them.

Will you just go over the old sealant?

No, never. Sealing over old material is one of the classic causes of early joint failure, so everything comes out first.

How a job runs

Before we leave any area, the masking comes off, the area is cleaned and every joint is checked, ready for your sign-off. Where the sealant needs time to cure before use, we tell you and sign the area. Planning a London job such as one in Farringdon 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’ll schedule to suit.

  1. Photos, drawings or a visit tell us about the joints and the access.
  2. Product choice follows the joint’s movement and substrate.
  3. Failed beads are removed in full and the joint faces cleaned.
  4. Primer is applied where the maker specifies it.
  5. Rod goes in to fix the depth, then the joint is sealed and tooled.
  6. The finished joints are checked with you.

Preparing the site

  • Point out any areas we must not close
  • Share your working hours and any access restrictions
  • Make sure the joints can be reached

Request a quote

For a fixed quote, speak to us on 01277 525 020 or email the details over, telling us the site location and the nature of the job. You can also send details through our quote form.

Get a price

Advice

Doing it in-house

Redoing a failed joint usually costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and we’ll confirm the paperwork you need with the quote.

Accreditations

Trusted. Accredited. Insured.