Facade and window perimeter sealing in City of London
We carry out facade joint and window perimeter sealing on commercial buildings in City of London and the surrounding area. Send photographs or drawings for a fixed quote.
- Discoloured or dirty facade joints
- Patch repairs that keep failing
- Weathered facade joints that have lost their grip
Facade sealing near City of London
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
About our facade sealing in City of London
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, using sealants classified for facade or glazing use. We work on cladding panel joints, stone and brick facade joints and shopfront frames, and the usual reasons a site gets in touch are draughts around frames and panels and hard, chalky sealant that no longer flexes. A single leaking joint is often how a building in City of London first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Every London site, City of London 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.
We stand by our work with a 12-month guarantee. It covers how we prepared and applied the sealant, and we come back if anything isn’t right.
- Where
- City of London (EC4V, EC1A, EC2M, EC2Y)
- Region
- City of London
- Cover
- A 12-month guarantee
- Quotes
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Page updated
- 3 November 2026
What we are called out for in City of London
Most facade joints fail through age and weathering. UV and weather harden the sealant until it can’t stretch with the building, and cracks or adhesion loss follow.
Most enquiries start with something like this:
- Failed sealant on precast panel joints
- Unsightly perimeter sealant on a visible elevation
- Weathered facade joints that have lost their grip
- Air leaks through failed facade joints
For a contractor at a hotel such as Clayton Hotel London Wall, under half a mile north-east of City of London, the mastic often has to be finished before a reopening date.
Comparing quotes
- How they handle RAMS and site documents
- Health and safety accreditation such as CHAS
- How the joint faces will be prepared and primed
- How the existing material will be dealt with
FAQs: City of London
Do you take on work at healthcare sites like St Bartholomew's Hospital?
Yes, hospitals are one of the sectors we cover. Each area is agreed with the ward or department and the estates team in advance.
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. Send the building rules and access times with your enquiry. All of Greater London is inside the ULEZ, and our planning allows for it
Do you take on multi-site work?
Yes. Multi-site work and planned programmes are a core part of the service, with each site phased to suit its occupants.
How do you choose the sealant?
A specification, where there is one, decides it. If there isn’t one, it comes down to the joint: its movement, its surfaces and what it has to cope with.
Does the weather affect the work?
For external joints, yes. Sealant needs a dry joint and a temperature within the product’s range, so damp, frosty or very cold days can stop external work. Internal work is rarely affected.
Can you send site paperwork?
Each site asks for different documents, so list what you need, whether RAMS, insurance or CSCS details, and we’ll confirm with the quote.
Do you provide access for facade work?
Access is planned with you before we quote. Tell us about access: existing scaffold, what you are arranging and any site restrictions, and the quote will reflect it.
When to bring in a specialist
Redoing a failed joint usually costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong normally costs more in the end than doing them right.
Our process
Working in a building that stays open takes some planning. We sign and contain the area we’re in, with routes through the building left open and move on in phases so staff and visitors can carry on around us. For a job in City of London, access comes first: 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.
- We plan access and the order of elevations with the client.
- We only seal when joints are dry and within the product’s temperature range.
- We remove the old bead and check the edges are sound.
- Joints are cleaned, primed if required and fitted with backing rod.
- Facade-grade sealant goes in and is tooled to a tidy concave profile.
- Once signed off, the work carries our 12-month guarantee.
What we need from you
- Warn occupants and staff about the work
- Share the asbestos register for older buildings
- Share your working hours and any access restrictions
Get a fixed quote
Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, call the office on 01277 525 020 or email the details over.
Advice
What happens if it’s left?
A few metres of new sealant compare well with replacing ceilings, linings or damaged stock. Water through a failed joint rarely stays where it starts, so the real damage is often some distance away. In City of London, 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.
There’s no price list, because the scope varies so much from one building to the next. For a fixed figure, call for a quote.
What you get with us
- Sealing commercial buildings since 2005
- Health and safety: CHAS accredited
- Colours chosen to suit frames, cladding or finishes where possible
- Failed material removed, not covered up
Read what affects the cost or our accreditations and insurance.
Owners, agents and contractors
Blocks and communal areas make up much of the work for housing associations and agents. We phase the work so people keep access, with each stage agreed with your site contact.
Facilities managers want contractors who arrive with the paperwork sorted. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.
How the quote is worked out
Sealant work doesn’t have a standard rate, because every site is different. What we look at:
- Site requirements such as inductions and permits
- Which sealant the job calls for
- The size and state of each joint
- How much there is to seal
Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.
Sending details for a quote
Whether it’s one area or a whole building, these details speed things up:
- How the joints are reached, and at what height
- Rough lengths or quantities, or drawings if you have them
- Photos of the joints, close up and from further back
- The site address and postcode
If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price the work to it. Smaller jobs need nothing more than photos and a few notes.
Places near City of London
More services for City of London
Contractors’ notes for City of London
Plenty of hotels sit less than 2 miles from City of London. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up. As part of Greater London, City of London is inside the ULEZ, which applies to every van on site. Delivery slots and scarce storage shape how and when the mastic goes in.
Recladding or extending a unit at a site like Southwark Bridge Business Centre (to the south of City of London) brings panel joints and frame perimeters into the programme. Further education sites such as London College of Marketing and Technology, 0.9 miles to the east of City of London, are extended and refurbished from time to time, with mastic often programmed into the summer break.
City of London is about 1 mile north of London, in City of London. Businesses, contractors and managing agents in City of London use us for work on facade joints, as part of our coverage of City of London. Our City of London coverage takes in 7 places.
If you need facade sealing in EC4V, EC1A, EC2M and EC2Y, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. Buildings on Aldermanbury Square, Monkwell Square and Paternoster Square are within our area for facade joints. Being close to the A1 and A3, City of London is easy to get to with materials and equipment. Sites close to City of London are covered too, including Barbican Estate (1 mile north), Bishopsgate (1 mile east), Finsbury (1 mile north), Aldgate (1 mile east) and St Luke's (1 mile north).
Landmarks near City of London
Around City of London, our work takes us to commercial buildings near St Mary-at-Hill, Prior Weston Primary School and Children's Centre and Golden Fleece pub. Nearby too are Central Foundation Boys' School (0.8 miles north), Barts Health Archives (under half a mile north-west) and St Alphage Garden (less than half a mile north). City of London has its own railway station: London Cannon Street station. Other landmarks nearby include Gabriel's Wharf (0.8 miles south-west) and London Mithraeum (less than half a mile south). For a walk, there’s St. James's Park Lake and Barnsbury Wood.