Greater London · England
New Build Mastic in Holborn
New build mastic for Holborn and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- New-build shower sealant that has already split
- Plot mastic for developers ahead of handover
- Sealant that never bonded to the surface
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
How we handle new build mastic in Holborn
Dust is the enemy of new-build sealant. We clean every joint thoroughly and prime where the surface and product need it, so the new bead bonds properly instead of bonding to the dust. Typical jobs include beads laid onto grit and dust from the build and gaps between new skirting and floors, across skirting & floors, kitchens and plot handovers.
Across London, commercial floors have movement joints that break down under heavy foot traffic, while new homes need a neat, sound finish around frames, baths and kitchens before handover, in Holborn and beyond.
You get a 12-month guarantee, the same in Holborn as everywhere else we work.
- Place
- Holborn (WC1X, WC1N, EC1R)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Landlords, agents and businesses in Holborn
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
If you manage several properties in or around Holborn, several properties can be quoted together. Just tell us the addresses and what each one needs.
Different surfaces, different methods
Bathrooms and en suites
En suite showers are a common source of leaks into the room below. A proper reseal keeps water in the tray.
Plot handovers
Send us the schedule and any sealant specification for a quote. We seal bathrooms, kitchens, frames and floors.
Joints and finishes in Holborn homes
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent.
If you’ve bought a new home near Farringdon station, the sealant around baths, showers and frames is worth checking in the first year or two.
Holborn is about 2 miles north-west of London, in Greater London. Whether you are in the middle of Holborn or further out, new build mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Greater London, we cover 764 places, and Holborn is one of them.
All of WC1X, WC1N and EC1R is covered for new build mastic. Streets in the area include Shoe Lane, Drury Lane and New Square, and we cover them all. Being close to the A4 and A40, Holborn is simple for us to get to. Close by, we work in Farringdon (1 mile east), St Pancras (1 mile north-west), Clare Market (1 mile south), Smithfield (1 mile east) and Temple Bar (1 mile south). We also work in nearby towns such as Kensington (4 miles west), Walthamstow (6 miles north-east), Hampstead (4 miles north-west), Ruislip (13 miles west), Brompton (3 miles south-west) and Stockwell (4 miles south).
Near you in Holborn
Locally, jobs take us to homes and businesses close to The Yorkshire Grey pub, British Library of Political and Economic Science and City Academy, among other places. Also close by are Elizabeth Garrett Anderson School (0.9 miles north) and Lincoln's Inn Fields (less than half a mile south-west). There’s a railway station in Holborn itself: Farringdon station. Well-known places in the area include Montfichet's Tower (0.7 miles south-east) and Brunswick Centre (0.5 miles north-west). Green spaces nearby include Barnsbury Wood and Ludgate Hill.
Holborn: your questions answered
Is parking an issue for new build mastic in Holborn?
Parking in Holborn, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Is Holborn in your area for new build mastic?
Yes. We work across London and the South East, and Holborn is part of that. You can call 0345 464 0079 or email us and let us know what needs doing, and we’ll give you a clear quote.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs.
Is it worth resealing while the house is still settling?
It depends on whether water is getting through. Failed seals in wet areas need doing now, while small cosmetic gaps can wait a while.
How long will you be here?
Typically it takes a few hours for most snagging lists, longer for a run of plots. Bigger jobs take longer, and we will say how long yours will take.
Will you leave a mess?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Where do you work from?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
How long before the joint can be used?
Most sealants are touch-dry well before they’re fully cured. We’ll give you the cure time for the product we used before we leave.
Honest limits
Before booking, it’s worth knowing the limits too:
- Cracking that points to a structural problem
- Disputes or warranty claims with your builder
- A tray or bath that is not properly supported, until it’s fixed
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
Joints and surfaces we work on
- Skirting & floors
- Windows & doors
- Plot handovers
- Kitchens
- Bathrooms & en suites
- Show homes
What we are called out for in Holborn
Later trades and the final clean can damage fresh sealant. If it’s disturbed before curing, the joint can be left weak.
Look out for any of the following:
- Gaps between new skirting and floors
- Cracked sealant around new window and door frames
- Joints pulling apart as timber shrinks
- Kitchen sealant that has pulled off the wall
As a London address, Holborn can be tricky for parking: let us know about parking bays, permits or a driveway.
Questions to ask before you book
- Is the old sealant removed completely?
- The length of the guarantee
- Who does the work, and how experienced they are
- What preparation is included
Aftercare tips
To keep the joints looking good and working properly:
- Use the extractor fan every time you shower
- Resist patching a failed seal with a tube from the DIY shop
- Report sealant problems to your builder during the snagging period
- Look at the sealant regularly in the first couple of years
Avoid standing on the rim of the bath or the edge of the tray while the sealant cures. If a bath or tray moves when you stand in it, get it looked at.
If a shower tray or bath seal splits in the first year, look for movement. Have it resealed, and the tray or bath checked, before it gets worse.
Places near Holborn
More services for Holborn
What we do, step by step
There isn’t much for you to do on the day. Point us to the joints and we will get on with it. The job generally takes anything from a few hours to several days, depending on the number of plots. In a London area like Holborn, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We start by agreeing which joints are on the list, from the snagging sheet or plot schedule.
- Failed or untidy sealant is cut out completely.
- We clean off dust from the build and prime the surfaces where the product needs it.
- A sealant chosen for each area goes in and is tooled smooth.
- We check every joint and tell you how long each needs to cure.
How to prepare
- Clear the area around the work
- Tell us about access, such as stairs, a lift or high-level joints
- Let us know about parking restrictions
How to get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add photos by email if you can.