Greater London · England
Temple Bar New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Temple Bar and across Greater London. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Internal frame sealant that has split
- Gaps opening as the house dries out and settles
- Messy sealant that spoils new finishes
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Wipe joints with warm soapy water
- Avoid running a DIY bead over the old one
- Report sealant problems to your builder during the snagging period
- Record problems with dated pictures
Photograph failed sealant before it’s redone and keep the builder’s replies. It’s useful if you need to raise other issues later.
Lifting sealant traps moisture and mould behind it. Dealing with it before it goes black saves a harder job later.
New build mastic in Temple Bar
Across Temple Bar, we work for both new-home owners and the builders handing those homes over. One shower or a whole phase of plots, the method doesn’t change: remove, clean, prime where needed, then a neat new bead. Typical jobs include smeared, uneven beads picked up at snagging and gaps opening as the house dries out and settles, on kitchens, show homes and bathrooms & en suites.
Much of London’s new housing is flats in larger developments. In a new development, snags are often reported through the developer or the managing agent, and failed shower seals, open skirting joints and gaps at thresholds are typical.
All our work comes with a 12-month guarantee.
- Place
- Temple Bar (WC2B, WC2E, EC1N)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Common problems we fix in Temple Bar
When the heating goes on in the first winter, the house dries fast. Gaps open along skirting, frames and worktops and cracks appear in the sealant.
Common reasons people contact us are:
- Gaps opening as the house dries out and settles
- Skirting joints opening in the first winter
- Leaking shower tray seals in a new home
- Smeared, uneven beads picked up at snagging
If you’ve bought a new home near City Thameslink station, the sealant around baths, showers and frames is worth checking in the first year or two.
What to look for in a quote
- How hidden problems are handled
- Who does the work, and how experienced they are
- Whether they’re fully insured
- Whether the sealant suits the joint
How the visit works
At the end, we look at the finished work together. The work normally takes a few hours in a single home, depending on the amount of work. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We start by going through the snagging items or plot schedule with you.
- The failed sealant is removed completely down to clean surfaces.
- We clean out the dust and grit left from the build.
- Primer goes on where the surface and product need it, then the new sealant.
- We tool every joint neatly and tell you when each area can be used.
Getting ready for the visit
- Clear the area around the work
- Where the joints are inside, avoid wetting them before we arrive
- For business premises, tell us about site rules or sign-in
How to get a quote
For new build mastic in Temple Bar, phone 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
Related advice
Questions from Temple Bar
Do you work for landlords with property near City Thameslink station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or email us with the details for a clear quote.
Can parking be tricky for a visit in Temple Bar?
Parking in Temple Bar, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot.
Do you hold any approvals?
Yes. We’re an ARBOMaster approved applicator.
Do you work in Temple Bar?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland, Temple Bar included.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned.
Do I have to be there?
It depends on the job. Inside work needs someone to give us access.
Do you work for hotels and businesses?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Is there a guarantee?
Yes, for a year. If anything is not right with the work within the year, let us know and we will sort it.
Why deal with it now?
The builder is usually the first port of call while the snagging or warranty period runs. If it keeps failing or is not dealt with, we can reseal it properly. Converted houses in London often have a bathroom above someone else’s living room, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in Temple Bar.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why choose Mr Mastic in Temple Bar
- Every job guaranteed for a year
- You choose the colour before work begins
- Any old sealant cut out fully, not covered over
- Fully insured
Take a look at how sealant jobs are priced and our reviews.
Landlords, agents and businesses in Temple Bar
We also work for property managers and facilities teams in Temple Bar and across Greater London. We can quote a run of properties together.
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
What the job involves on each surface
Show homes
In a show home, the sealant is on display. We lay neat, even beads in colours to suit the finishes.
Windows and doors
External mastic around new windows and doors is sometimes rushed or missed. We reseal it with a weatherproof, flexible sealant.
What new build mastic looks like in Temple Bar
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent.
Temple Bar is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Temple Bar is about 1 mile south of St Pancras, in Greater London. Temple Bar gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Temple Bar is one of 764 towns and villages in Greater London where we work for new build mastic.
We cover every part of WC2B, WC2E and EC1N for new build mastic and the streets around it. We cover properties on Shoe Lane, Drury Lane and New Square and the roads around them. With the A4 and A40 close by, Temple Bar is easy for our applicators to reach for new build mastic. We also cover the places around Temple Bar: Temple (1 mile south), Clare Market (1 mile west), Aldwych (1 mile west), Blackfriars (1 mile east) and Covent Garden (1 mile west). Further out, we also cover 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 (3 miles south).
What’s near Temple Bar
Typical jobs here are in homes near British Library of Political and Economic Science, Mercers' School and London Nautical School, among other places. Also close by are Lincoln's Inn Fields (within half a mile north-west) and Queen's Head Tavern (under half a mile north-east). There’s a railway station in Temple Bar itself: City Thameslink station. Nearby you’ll also find Montfichet's Tower (0.5 miles east) and Twinings Museum (under half a mile south-west). The countryside around Temple Bar includes Ludgate Hill and Barnsbury Wood.
Nearby places to Temple Bar
Also in Temple Bar
Honest limits
To be straight with you, some problems need a different trade:
- Deciding who is responsible under a builder’s warranty
- Movement caused by a poorly fitted tray or bath
- Structural cracks in walls or ceilings
If you’re not sure, just call 0345 464 0079 or email us and we will give you a straight answer before booking.
Where we work in Temple Bar
- Show homes
- Kitchens
- Windows & doors
- Plot handovers
- Bathrooms & en suites
- Skirting & floors