Greater London · England
New-build mastic & snagging in St George's Fields, Greater London
Plot mastic for developers and snagging failed sealant in new homes in St George's Fields, with a 12-month guarantee on every job. Call for a quick quote.
- Sealant work across a run of new homes
- Internal frame sealant that has split
- Beads laid onto grit and dust from the build
About our new build mastic in St George's Fields
Failed shower seals, gaps along the skirting and messy beads are common items on a new-home snagging list. While the builder’s snagging or warranty period runs, report it to them first, and if it is not put right, get in touch with us. If you’re dealing with new-build shower sealant that has already split and internal frame sealant that has split, we can help.
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.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Place
- St George's Fields (SE1, SE11, SE17)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
We work for landlords and agents as well as householders. Resealing between tenancies keeps a property looking cared for.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
What happens if it’s left?
Running a new bead over the builder’s sealant might look tidy for a few weeks, but it won’t bond to the old layer. Taking it all out and starting again is the only way to get a lasting seal. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in St George's Fields, the repair is bigger than the sealant job would have been.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will explain what it covers.
Why us?
- 180+ five-star Google reviews
- We leave the area clean and tidy
- Homes, businesses and hotels
- Arbo and Everbuild products
Read our cost guide or what customers say.
When it is not the sealant
In fairness, some problems need a different trade:
- Settlement cracks that need a surveyor
- Baths and trays that move too much for sealant to cope with
- Your warranty claim itself, which is between you and the builder
If you’re not sure, just phone 0345 464 0079 or email us and we will give you a straight answer before booking.
Joints and surfaces we work on
- Kitchens
- Windows & doors
- Plot handovers
- Show homes
- Bathrooms & en suites
- Skirting & floors
Also near St George's Fields
Other services in St George's Fields
Joints and finishes in St George's Fields homes
Compared with the north and west, the South East gets less rain, 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.
If you’ve bought a new home near Elephant & Castle station, the sealant around baths, showers and frames is worth checking in the first year or two.
St George's Fields is about 1 mile west of London, in Greater London. For new build mastic in and around St George's Fields, please phone 0345 464 0079 or drop us an email for a quick quote. We’re based in Crawley and cover Greater London, St George's Fields included. St George's Fields is one of 764 places in Greater London we cover for new build mastic.
We cover every part of SE1, SE11 and SE17 for new build mastic. We cover properties on York Road, Spur Road and Bear Lane. Main roads around St George's Fields include the A300 and A302, so getting to you is simple. We also cover Elephant and Castle (1 mile south-east), Newington Butts (1 mile south-east), Vauxhall (1 mile south-west), Lambeth (1 mile south-west) and Westminster (1 mile west). Further out, we also cover Kensington (4 miles west), Walthamstow (7 miles north-east), Hoxton (3 miles north), Hampstead (5 miles north-west), Ruislip (14 miles west) and Brompton (3 miles west).
What’s near St George's Fields
Around St George's Fields, our work takes us to homes and buildings near The Duke Of Clarence Public House, London School of Musical Theatre and Lambeth Palace Library. Other local landmarks include Notre Dame Roman Catholic Girls' School (within half a mile south-west) and Geraldine Mary Harmsworth Park (within half a mile south-west). St George's Fields has its own railway station: Elephant & Castle station. Nearby you will also find Baynard's Castle (0.9 miles north) and General Lying-In Hospital (0.5 miles west). Open spaces near St George's Fields include Bellenden Road Nature Garden and St. James's Park Lake.
Your questions about new build mastic in St George's Fields
Can you do new build mastic in St George's Fields?
Yes. Our work covers London and the South East, and St George's Fields is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing, and we will give you a clear quote.
Do you work for landlords with property near Elephant & Castle station?
Yes, rental work is part of what we do. You can ring 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Can you do several jobs on one visit?
Yes. Several rooms, windows or areas can go on one quote.
Where do you work from?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
What information do you need?
Just the basics: where it is, what you’ve noticed and how we reach it. After that, simply ring 0345 464 0079 or email us.
Is it worth resealing while the house is still settling?
If the seal has failed and water is getting in, do it now. Hairline cosmetic gaps can wait until the house has settled.
Is it worth trying it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us and we’re fully insured.
Aftercare tips
Joint life depends on how it’s used and looked after. We suggest:
- Record problems with dated photos
- Put sealant faults on your snagging list early
- Clean sealant with mild detergent, not abrasives
- Act quickly if a seal starts to leak
Don’t stand on the bath edge or the lip of the tray while the sealant cures. If a bath or tray moves when you stand in it, get it looked at.
A seal that splits early is often a sign of movement. Have it resealed, and the tray or bath checked, before it gets worse.
Common problems we fix in St George's Fields
Sealant applied onto damp surfaces does not bond well. On a busy site, joints are not always given time to dry.
If you can see any of these, it’s time to have the joints looked at:
- Cracked caulk along new skirting
- Plot mastic for developers ahead of handover
- Sealant that never bonded to the surface
- Worktop and upstand sealant coming away
St George's Fields is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Before booking anyone
- How much experience the applicator has
- Is VAT in the price?
- Whether the sealant suits the joint
- What happens if the job turns out different
What happens on the day
When we arrive, we look over the joints with you first, so you know exactly what we are doing. Surfaces next to the work are protected before work begins. Most jobs take a few hours for most snagging lists, longer for a run of plots. In a London area like St George's Fields, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- Every bit of the old builder’s sealant is cut out.
- Joints are vacuumed and cleaned of building dust.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
How to prepare
- Tell us if parking is tricky
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
Getting a quote
For new build mastic in St George's Fields, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before we start.
Advice
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
A DIY attempt does not rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.