Mastic Sealing in Barbican Estate
Our CSCS-carded applicators take on mastic sealing for building owners, managing agents and housing associations in Barbican Estate. Send photographs or drawings for a fixed quote.
- Water getting in round frames after rain
- Damaged joints in communal entrances and corridors
- Brittle perimeter mastic across a building
Mastic sealing for businesses in Barbican Estate
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 Barbican Estate
Treatment starts with a proper look: which joints have failed, why, and whether sealant is the right answer. Failed mastic is stripped, the faces taken back to sound material, primed where the manufacturer specifies and resealed and backing rod used wherever a joint is deep. We work on shopfronts below residential blocks, balcony and threshold joints and communal kitchens and washrooms, and the usual reasons a site gets in touch are water getting in round frames after rain and failed external movement joints. Facilities teams, main contractors and managing agents in Barbican Estate tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.
Planning mastic work on a London block means notices to residents, access to flats and agreed working areas. Work is planned with the agent so residents get notice and access is arranged in advance.
The 12-month guarantee covers our workmanship: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.
- Where
- Barbican Estate (EC1V, EC2A, EC1Y)
- Wider area
- City of London
- Guarantee
- A 12-month guarantee
- Quotes
- Quoted before any work starts
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
Our process
Site rules come first: sign-in, induction and whatever permit system the building uses. With the paperwork done, we take the joints in the sequence agreed with you. Most London premises stay occupied while we are on site, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.
- Each block or building is walked and the failed joints recorded with the likely cause.
- You get a fixed quote, priced per building where that helps your budgeting.
- Dates, areas and access are agreed so residents or tenants can be told in advance.
- We remove the old mastic completely and clean the joint faces back.
- Backing rod and primer go in where the joint and the product need them, then new sealant is applied and tooled.
- Finished joints are looked over and the 12-month guarantee confirmed.
Getting the site ready
- Let us know about inductions and permits
- Agree which areas must stay open
- Send your site hours and access windows
Getting a fixed quote
If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photographs and a few notes.
Related advice
Doing it in-house
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.
Some joints are best left to specialists: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.
Questions about Barbican Estate
Do you work in London buildings with loading restrictions?
Yes, we plan every London job around the building’s own access rules. Share the building’s contractor rules and we will work to them. All of Greater London is inside the ULEZ, and our planning allows for it
Can you work in a care home near Barbican Estate with residents in?
Yes. We work around residents’ routines, a room or two at a time. Tell us about any infection-control or safeguarding requirements and we will work to them.
Do you cover Barbican Estate?
Yes. We cover Barbican Estate, and you can speak to us on 01277 525 020 or use the quote form to get started.
Is asbestos a concern with old mastic?
Asbestos removal isn’t part of our work. Anything suspect is tested before we carry on in line with the dutyholder’s asbestos management.
Can you plan resealing across several buildings?
Yes. Each building is inspected, quoted and scheduled in turn starting wherever is most urgent.
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 it all comes out first.
What guarantee do you give on resealing?
Every building we reseal has a 12-month guarantee. It applies to our workmanship rather than damage or problems with the frames.
Keeping the joints sound
Your facilities or cleaning team can help the joints last. Pass these on to them:
- List the paperwork your organisation requires when you send details
- Avoid piecemeal callouts where you can
- Check sealant joints during planned building inspections
- Make it easy for occupiers to report draughts
If paintable sealant was used, decoration can follow once it has cured. Silicone usually can’t be painted, so keep decorators off it unless told otherwise.
Budgets are easier to plan when sealant is part of planned maintenance. A programme can start with the worst buildings so spending is spread.
Commercial clients in Barbican Estate
Whether you’re a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.
Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.
Frames, entrances and external joints in Barbican Estate
There are four care or nursing homes within about 2 miles of Barbican Estate. Owners of care premises can bring window and door mastic into a phased programme planned around the home. In London, mastic work on a block goes through the managing agent or landlord, with notice to residents. We work to your notice and access plan.
If your remit includes a building such as Prior Weston Primary School and Children's Centre, frame and door mastic can be programmed for the holidays. Student accommodation around universities such as The University of Law, less than half a mile north-east of Barbican Estate, is usually managed block by block, which suits a planned mastic programme.
Barbican Estate is about 1 mile north of London, in City of London. Anywhere in EC1V, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. We work across 7 places in City of London.
We take on mastic joints across the EC1V, EC2A and EC1Y postcode area, whatever the building. If your site is on Oat Lane, Shoe Lane and Long Lane or close by, send details and we will quote for mastic joints. You will find Barbican Estate on or near the A1 and A40. Nearby places we also cover include Finsbury (1 mile north), City of London (1 mile south), St Luke's (1 mile north), Bishopsgate (1 mile east) and Aldgate (1 mile south-east) for mastic joints.
Near you in Barbican Estate
Around Barbican Estate, our work takes us to commercial buildings near St Mary-at-Hill, Charterhouse Square School and Barts Health Archives and the streets around them. You’ll also find The Jugged Hare pub (under half a mile north-east), Central Foundation Boys' School (0.6 miles north-east) and Barbican Conservatory (less than half a mile north). Barbican Estate has its own railway station: Moorgate station. Other landmarks nearby include Clockmakers' Museum (less than half a mile south) and Gabriel's Wharf (1 mile south-west). For a walk, there’s Barnsbury Wood and Ludgate Hill.
What we are called out for in Barbican Estate
Much failed sealant was laid on dirty, dusty or damp surfaces. Where the faces weren’t cleaned or primed as specified it comes away from one face.
These are often picked up first by site or facilities staff:
- Brittle perimeter mastic across a building
- Failed external movement joints
- A mix of products and colours from past repairs
- Damp patches beside frames
Trustees of buildings like St Giles-without-Cripplegate can bring frame and external mastic into a planned maintenance list.
Before you book anyone
- Whether primer will be used where the manufacturer specifies it
- How the existing material will be dealt with
- Whether their applicators hold CSCS cards
- What level of public liability insurance do they hold?
Towns and villages near Barbican Estate
More services for Barbican Estate
When it isn’t the sealant
We check first that sealant really is the fix. It isn’t the answer for:
- Leaks from above rather than through a joint
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
- Substrate edges that need repairing first
If in doubt, call the office on 01277 525 020 or email the details over and we will say what we think.
Joints and surfaces we work on
- Balcony and threshold joints
- External wall and movement joints
- Shopfronts below residential blocks
- Window and door perimeters on blocks
- Communal entrances and stairwells
- Communal kitchens and washrooms