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

Covent Garden facade sealing

Need facade sealing in Covent Garden? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.

  • Weathered facade joints that have lost their grip
  • Failed seals around shopfront and entrance frames
  • Previous reseals run over old sealant
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
Constructionline member
£5m PL insurance

Need facade sealing in Covent Garden?

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

What happens if it’s left?

Leaving failed perimeter sealant also makes the eventual job bigger: edges get wet, render and timber deteriorate and frames can move. Acting at the first sign of splitting keeps the fix simple. Repeat call-outs disrupt occupied London buildings, so cutting the old sealant out fully and doing it right once is the better route.

The price depends on how many linear metres there are, how much old material needs removing and the access. Call for a quote when you are ready.

Why appoint us

  • Matching to RAL references, product permitting
  • Our applicators hold CSCS cards
  • Commercial sealant work since 2005
  • CHAS accredited contractor

Read what affects the cost or how we’re accredited.

Facade sealing in Covent Garden, done properly

Every facade quote starts with how the joints will be reached. Tell us about access: whether scaffold is already up, what the client is arranging, and any restrictions on the site. We work on coping and flashing joints, window and door perimeters and shopfront frames, and what we are called in for most is staining on stone next to old sealant and cold air coming in at window perimeters. For commercial sealant work in Covent Garden, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.

Every London site, Covent Garden included, is inside the ULEZ, which applies to deliveries and contractors’ vans alike. Add booked delivery slots and limited storage, and a London mastic package needs planning before the first bead.

Every job ends the same way: guaranteed. Our workmanship is backed for 12 months, and the quote explains what it covers.

Mastic Doctor team members lined up next to their branded vans outside an office building
Place
Covent Garden (W1F, W1D, W1T)
Wider area
Greater London
Guarantee
12 months on every job
Quote
A fixed quote before we start
Call
01277 525 020
Last updated
3 November 2026

Questions we are asked in Covent Garden

Will you plan work around the academic year at somewhere like King's College London?

Yes, holiday working periods are the norm on campus jobs. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

Is hospital work, at somewhere like Royal London Hospital for Integrated Medicine, something you do?

Yes. Healthcare sites are among the places we work. The estates team’s permit system and infection-control rules come first, and the work is planned around them.

Do you guarantee your work?

Yes, for 12 months. If our installation fails in that time, we return and fix it.

Can you work while the building is occupied?

Yes, with some planning. Tell us your site hours and access windows and we’ll plan around them.

Is it okay to overlay old mastic?

No. New sealant won’t hold on old sealant, so the old bead is cut away and the faces are cleaned before resealing. That is what makes the new joint last.

Can you look at water coming in around a frame?

Yes. Photos help, and you can phone 01277 525 020 or email drawings and photos to arrange a visit. Failed perimeter sealant is a common cause, but not the only one.

Can you quote from photos?

It depends on the job. Simple work can often be priced from photos, and bigger or more complex jobs usually get a visit.

From enquiry to sign-off

Where the site stays busy, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed, then reopened once the sealant allows before we move to the next. Most London premises stay occupied while we’re on site, so we agree zones and timings with the building or facilities manager. Phased work keeps the rest of the building in use.

  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. We remove the old bead and check the edges are sound.
  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

  • Share your working hours and any access restrictions
  • Clear stock, furniture or equipment away from the joints
  • Send any specification or drawings in advance

Get a fixed 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 send details through our quote form to discuss it first.

Ask for a quote

Related advice

Do you need facade sealing in Covent Garden?

Most facade joints fail through age and weathering. UV and weather harden the sealant until it can’t stretch with the building, then it splits or peels.

Look out for the following:

  • Cold air coming in at window perimeters
  • Discoloured or dirty facade joints
  • Facade joints cracked through the middle
  • Weathered facade joints that have lost their grip

On a campus such as King's College London (less than half a mile east of Covent Garden), new teaching buildings and residences are normally built and refurbished around the academic year.

What to look for in a quote

  • How joint depth will be controlled
  • Are they CHAS accredited or on Constructionline?
  • Is the sealant right for the movement and the substrate?
  • Proof of insurance

Our contractor checklist

What the job involves on each surface

Coping and flashing joints

Coping and flashing joints are included where sealant is the specified fix. These joints take full exposure to weather and need a durable external sealant.

Render and coated surfaces

Paintable sealants exist for joints that will be coated. We confirm the product with you before starting.

New build and refits around Covent Garden

There are a good number of hotels within about 2 miles of Covent Garden. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades. Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in Covent Garden. Delivery slots and scarce storage shape how and when the mastic goes in.

For a contractor at a hotel such as Fielding Hotel, which lies north of Covent Garden, the mastic often has to be finished before a reopening date. For contractors at a college like Kensington College of Business, under half a mile north-east of Covent Garden, perimeters and internal sealant are timed for the holidays.

Covent Garden is about 1 mile east of City of Westminster, in Greater London. Covent Garden sits inside our coverage and the rest of Greater London, with the same fixed quotes and 12-month guarantee as everywhere else. We work across 764 places in Greater London.

If you need facade sealing in W1F, W1D and W1T, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. Streets here include Duck Lane, Drury Lane and New Square, and sites on any of them can send details for a fixed quote. You will find Covent Garden on or near the A301 and A400, so getting applicators and materials to site is simple. Close to Covent Garden, our area also takes in Seven Dials (1 mile west), Aldwych (1 mile east), Adelphi (1 mile south), St Giles (1 mile north-west) and Clare Market (1 mile north-east). A short drive away, we cover Kensington (4 miles west), Walthamstow (7 miles north-east), Hampstead (4 miles north-west), Ruislip (13 miles west), Stockwell (3 miles south) and Orpington (13 miles south-east).

Near you in Covent Garden

In Covent Garden, that means premises near Victoria Embankment Gardens, London Nautical School and Mercers' School. Also close by are Punch & Judy pub (less than half a mile south-west) and LSE Shaw Library (under half a mile north-east). There’s a railway station in Covent Garden itself: London Charing Cross station. Nearby you will also find Montfichet's Tower (0.9 miles east) and Savoy Hospital (under half a mile south-east). The countryside around Covent Garden includes Ludgate Hill and Barnsbury Wood.

Map of Covent Garden © OpenStreetMap contributors

Doing it in-house

There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we will confirm the paperwork you need with the quote.

Redoing a failed joint typically 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.

Aftercare for building managers

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

  • Report water ingress at frames as soon as it shows
  • Check the asbestos register before old mastic is disturbed
  • Inspect facade joints on a regular cycle
  • Clear debris that holds water against joints

Blocked sills and gutters push water at the joints. Good drainage keeps water moving off the facade rather than sitting against the joints.

Get the joint design right when resealing: the right width, backing rod and a sealant with enough movement capability. A well-designed joint lasts longer than a like-for-like copy of a failed one.

Accreditations

Trusted. Accredited. Insured.