Mastic sealing for building owners and managing agents in Bishopsgate, City of London
Work needed on a mastic joint in Bishopsgate? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Water getting in round frames after rain
- Repeated reactive repairs to the same buildings
- Occupiers reporting cold air round windows
Mastic sealing in Bishopsgate
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
How we handle mastic sealing in Bishopsgate
In buildings from before 2000, some old mastics contain asbestos. We check the asbestos register or survey before any old sealant is cut out, and work stops for testing if there’s any doubt. We don’t remove asbestos-containing materials. If you’re dealing with the same joint failures repeated across a portfolio and patchy repairs in mismatched sealant, we can help, on window and door perimeters on blocks, balcony and threshold joints and communal kitchens and washrooms alike. A single leaking joint is often how a building in Bishopsgate first comes to us: we look at the rest while we are there and tell you what we find.
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.
Whoever the client is, the cover is the same: 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.
- Place
- Bishopsgate (E1, EC2A, EC1Y)
- Wider area
- City of London
- Guarantee
- 12 months on our workmanship
- Price
- Quoted before any work starts
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Common problems we fix in Bishopsgate
Topping up old mastic is a common shortcut. New silicone has nothing to grip on old silicone and the repair soon fails.
Clients normally get in touch after noticing something like this:
- Damaged joints in communal entrances and corridors
- Occupiers reporting cold air round windows
- Estate-wide sealant that is simply worn out
- Cracked, hardened mastic round windows on a block
Student accommodation around universities such as Coventry University London Campus (to the north-east of Bishopsgate) is normally managed block by block, which suits a planned mastic programme.
What to look for in a quote
- How the existing material will be dealt with
- Their pre-qualification and accreditations
- What the guarantee covers, and for how long
- Will CSCS-carded applicators be on site?
Mastic sealing around Bishopsgate: what changes locally
There are nine care or nursing homes within about 2 miles of Bishopsgate. Care home owners need frame and external mastic kept sound without unsettling residents. For a London block, the agent or landlord normally handles notices to residents and access to flats. We work to your notice and access plan.
If your remit includes a building such as The London School of Barbering, frame and door mastic can be programmed for the holidays. If you own or manage units on a site such as Southwark Bridge Business Centre, which lies south-west of Bishopsgate, failed mastic on frames, door surrounds and external joints can be dealt with unit by unit.
Bishopsgate is about 1 mile north-east of London, in City of London. We send applicators to Bishopsgate for mastic joints. Bishopsgate is one of 7 places in City of London on our list.
Postcode districts covered here: E1, EC2A and EC1Y. Among the streets we cover are Bush Lane, Swan Lane and Love Lane, and sites on any of them can send details for a fixed quote. Access to Bishopsgate is via the A3 and A10, so getting applicators and materials to site is simple. If your building is just outside Bishopsgate, we cover Aldgate (1 mile south-east), Spitalfields (1 mile east), City of London (1 mile west), Tower Hill (1 mile south) and Whitechapel (1 mile east).
Local landmarks in Bishopsgate
We work on buildings around St Mary-at-Hill, Finsbury Circus and White Hart pub and the streets around them. You’ll also find The Aldgate School (under half a mile south-east), Bishopsgate Institute Special Collections and Archives (under half a mile north-east) and Central Foundation Boys' School (0.7 miles north). There’s a railway station in Bishopsgate itself: London Liverpool Street station. Other landmarks nearby include Tower of London (0.6 miles south-east) and Gabriel's Wharf (1.2 miles south-west). Open spaces near Bishopsgate include Lavender Pond and Tower Hill.
What happens if it’s left?
Dealing with failed joints one report at a time is slow and scattered. A planned programme treats each building once, under a single quote and a single programme. In Bishopsgate, 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, since every building and every scope is different. For a fixed figure, call for a quote.
Why appoint us
- Workmanship guaranteed for 12 months
- CSCS-carded applicators
- Colour agreed before work starts
- Fixed quotes based on photos, drawings or a visit
Take a look at what affects the cost or our accreditations and insurance.
Also near Bishopsgate
More services for Bishopsgate
From enquiry to sign-off
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 we check in with your contact before moving on to each new area. In Bishopsgate, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.
- First we look at the mastic on each building and note what needs replacing.
- You get a fixed quote, priced per building where that helps your budgeting.
- The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
- Failed mastic is removed and the faces taken back to sound, dry material.
- Backing rod and primer go in as the joint requires, then the new bead is placed and tooled.
- Completed joints are inspected and carry a 12-month workmanship guarantee.
Before we start on site
- Send your site hours and access windows
- Share the asbestos register for older buildings
- Let building users know which areas are affected
Request a quote
To get a fixed quote, call 01277 525 020 or email us with the site address and an outline of the work. Our quote form is another easy route.
Related advice
What we can’t put right
Before quoting, we check that sealant is the right answer. It won’t put right:
- Cracked or crumbling render, brick or stone at the joint edges (we’ll tell you if so)
- Broken glass or failed sealed units
- Failed window or door frames, which need a window contractor
If in doubt, give us a call on 01277 525 020 or email a schedule or drawings and we’ll say what we think before you book.
What we seal
- Shopfronts below residential blocks
- External wall and movement joints
- Window and door perimeters on blocks
- Balcony and threshold joints
- Communal entrances and stairwells
- Communal kitchens and washrooms
After the work
Keep the joints in good shape with a few simple steps:
- Encourage occupiers to report problems at frames
- Avoid piecemeal callouts where you can
- Start inspections with the most exposed faces
- Keep a record of when each building was resealed
Keep bins, bikes and deliveries away from low-level joints where you can. Knocks cause many early failures in communal areas.
Water getting in round frames can damage plaster, decoration and the frames themselves. Early resealing is far simpler than repairs inside.
Bishopsgate: questions and answers
Can you work in a London building with booked loading and goods-lift slots?
Yes, most London buildings have access rules of some kind, and we plan around them. Send the building rules and access times with your enquiry. The ULEZ covers the whole of Greater London, which we allow for
Does your area include sites such as Southwark Bridge Business Centre, near Bishopsgate?
Yes. We cover Bishopsgate and the area around it, including industrial estates, business parks and retail parks such as Southwark Bridge Business Centre. Send details of the unit and the work through our quote form for a quick quote.
Can people stay in the building while you reseal?
Residents and tenants carry on as normal. If any flats or units need access, we’ll tell you in advance so you can arrange it with occupiers.
When can the area be used after sealing?
The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.
Do you need to see the site first?
That depends on the size and complexity of the job. Simple work can often be priced from photos, while larger or less clear jobs get a site visit first.
Do you guarantee the mastic work?
There is a 12-month guarantee on our workmanship and we hold public liability insurance.
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.
Site staff or a sealant specialist?
What you see is the finished bead, but most of the work is hidden. Backing rod, primer where specified and a joint designed to move with the building are easy to get wrong without experience.
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.