Construction and new-build mastic in Farringdon, Greater London
Construction mastic for Farringdon, from a contractor working since 2005. Fully insured and CHAS accredited.
- Missed perimeter joints on a new elevation
- A long mastic snag list close to completion
- Oversized or tapered gaps around new frames
Need construction mastic in Farringdon?
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Common questions from Farringdon clients
Is hospital work, at somewhere like St Bartholomew's Hospital, something you do?
Yes, provided the work is planned with the site’s estates team. Each area is agreed with the ward or department and the estates team in advance.
Do you take on jobs in Farringdon where loading and access are tightly controlled?
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. The ULEZ covers the whole of Greater London, which we allow for
Can you work to our specification?
Yes. Include it with the drawings when you ask for a quote, and the quote will be based on it, flagging anything that needs clarifying.
What joints do you seal on a new build?
The scope comes from the specification and drawings, but most packages include frame perimeters, sanitary and kitchen joints, caulking where specified and a snagging pass.
How long before the joints can be used?
Curing time varies by product, and we confirm it on the day, and flag anything to keep off until it has cured.
What happens if the weather stops external sealing?
Outside, the joint has to be dry and the temperature within the product’s limits. Frosty or damp mornings can hold up external sealing so we usually switch to internal work when that happens.
Do your applicators hold CSCS cards?
Our applicators hold CSCS cards, and we are CHAS accredited and a Constructionline member. Public liability insurance of five million pounds is in place too.
Construction mastic in Farringdon
On refurbishments, the mastic package typically includes cutting out old sealant as well as sealing new work. Old beads come out completely, as fresh silicone can’t grip old, and on older buildings we ask for the asbestos survey before disturbing anything. New and existing joints then get the same preparation. If you’re dealing with failed sealant in an existing building being refurbished and a mastic package split between trades with no clear owner, we can help, whatever the surface. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Farringdon, that means joint design, primers and backing rod as standard.
Every London site, Farringdon 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.
Guaranteed is the last step of every job. Our workmanship is backed for 12 months, and the quote explains what it covers.
- Location
- Farringdon (EC1V, EC1R, EC1P)
- Region
- Greater London
- Cover
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
What sets the cost
A fixed quote reflects the actual work. It allows for:
- Backing rod, priming and other preparation
- The product specified
- How much there is to seal
- Any access equipment needed
The work involved drives the cost: stripping out, preparation, sealing, access and phasing. Call for a quote.
What we need to price the job
A few photographs plus some basic facts will normally do. Please tell us:
- Your programme or deadline
- How the joints are reached, and at what height
- What the building is and how it’s used
- The product your specification calls for
Pricing a project or setting a maintenance budget? We will quote against your scope and drawings you can plan around. If you have questions first, give us a call on 01277 525 020 or email a schedule or drawings.
New build and refits around Farringdon
The area within 2 miles of Farringdon holds plenty of hotels. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up. 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.
Work at a hotel such as Zetter Hotel (under half a mile north of Farringdon) tends to be programmed around bookings, mastic included. When a college such as City and Islington College, 0.7 miles north of Farringdon, builds or refurbishes, the mastic package typically has to fit around students and staff.
Farringdon is about 2 miles north of London, in Greater London. Businesses, contractors and managing agents in Farringdon can call on us for mastic packages. Across Greater London, 764 places are covered, including Farringdon.
Anyone looking for construction mastic in EC1V, EC1R and EC1P gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. For a building on Oat Lane, Shoe Lane and Long Lane or nearby, we can quote for mastic packages. With the A1 and A4 nearby, Farringdon is straightforward for us to reach. If your building is just outside Farringdon, we cover Smithfield (1 mile south), Clerkenwell (1 mile north), Holborn (1 mile west), Blackfriars (1 mile south) and Temple Bar (1 mile south-west). Further afield, our area takes in 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).
Local landmarks in Farringdon
In Farringdon, that means premises near The Castle Public House, St Mary-at-Hill and Barts Health Archives. Nearby too are St Peter and St Paul RC Primary School (less than half a mile north), Barbican Conservatory (less than half a mile east) and Central Foundation Boys' School (0.8 miles east). Farringdon has its own railway station: Farringdon station. A little further out are Museum of the Order of St John (under half a mile north-east) and Gabriel's Wharf (0.9 miles south). Open spaces near Farringdon include Ludgate Hill and Barnsbury Wood.
What we can’t put right
We check first that sealant really is the fix. It won’t put right:
- Frames fitted out of tolerance
- Rework caused by others damaging completed areas
- Designing joint widths or choosing the specification (that sits with the designer)
Not sure which it is? You can phone 01277 525 020 or email a schedule or drawings and we will tell you honestly.
Joints and surfaces we work on
- Internal decorators’ caulk
- Cladding and panel joints
- Sanitary and kitchen joints
- Floor and skirting junctions
- Brick and block movement joints
- Window and door perimeters
From enquiry to sign-off
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. Send the building rules and access times with your enquiry.
- We start with the drawings, specification and programme.
- Quantities are measured and a fixed price returned.
- We agree with the site team which areas come first.
- Each area is sealed when it’s released.
- Every joint is cleaned, set to depth and sealed with the specified product.
- Snags are cleared and the package signed off with our 12-month guarantee.
What we need from you
- Agree which areas must stay open
- Warn occupants and staff about the work
- Have the specification and drawings to hand
Ask for a quote
If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price the work to it. For smaller jobs, photographs and a description will do.
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Places near Farringdon
Other services in Farringdon
Building owners, agents and FMs in Farringdon
Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Sites in Farringdon can sit alongside others in a wider programme.
Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. Programme, specification and site rules come first, with CSCS-carded applicators on site.
After the work
Sealant joints are maintenance items, and their life depends on movement, exposure, cleaning and use. Our advice:
- Brief the final clean team to avoid blades near sealant
- Allow flexibility for external sealing in damp or cold weather
- Ask for joint and product checks before the package is urgent
- Record the products used in the O&M file
Brief the sparkle clean so they don’t scrape the new joints. Blades and abrasive pads are the commonest cause of damage at the final clean so keep them off the joints.
Frames with gaps too wide for sealant need sorting before the mastic goes on. Sealant stretched over an oversized gap won’t last so packing or adjustment by the installer comes first. We flag them as soon as we see them.
What we’re called out for in Farringdon
A new building moves while it dries and settles. Plaster, screeds, timber and blockwork all shrink as they lose moisture and internal caulk in a moving joint is normally the first to crack. Picking a flexible sealant where there’s movement keeps snags down.
Common reasons buildings call us in:
- Early adhesion failures on new external joints
- Failed sealant in an existing building being refurbished
- Mastic snags holding up handover
- Perimeter gaps outside the sealant’s range
For contractors on a campus like Queen Mary's University West Smithfield Campus, under half a mile south-east of Farringdon, facade and perimeter sealing has to fit around students and term dates.
What your quote should include
- Will RAMS and insurance details be available?
- Who will actually carry out the work
- Proof of insurance
- Can the work be phased to keep areas open?