Greater London · England
New Build Mastic in Chelsfield
We cover Chelsfield for plot mastic for developers and snagging failed sealant in new homes. Old material cut out, joints cleaned and sealed neatly.
- Untidy sealant flagged on a snagging list
- Beads laid onto grit and dust from the build
- Plot mastic for developers ahead of handover
About our new build mastic in Chelsfield
New homes move as they dry out. Timber shrinks, plaster dries and baths and trays bed down, and sealant applied in a hurry at handover can split. Common call-outs are for gaps between new skirting and floors and joints pulling apart as timber shrinks, across show homes, skirting & floors and windows & doors.
From brand-new flats to converted terraces with new flooring, London has every kind of floor. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- Chelsfield (BR6)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Do not seal over failed sealant yourself
- Don’t wait for the house to settle if water is getting through
- Record problems with dated photos
- Follow the cure time we give you
Watch the joints as the house settles. Hairline gaps can open as timber and plaster dry and can be resealed later.
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.
New homes and floors in Chelsfield
Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you’ve bought a new home near Chelsfield station, the sealant around baths, showers and frames is worth checking in the first year or two.
Chelsfield is about 2 miles south-east of Orpington, in Greater London. Anywhere in BR6, our applicators can take on new build mastic. Chelsfield is one of 764 towns and villages in Greater London where we work for new build mastic. There’s also a page for London, about 14 miles away.
All of BR6 is covered for new build mastic. You’ll find streets such as Orlestone Gardens, Warren Road and Bucks Cross Road. We also cover the places around Chelsfield: Maypole (1 mile south-east), Bopeep (1 mile south-east), Goddington (1 mile north-west), Well Hill (1 mile east) and Pratt's Bottom (1 mile south-west). We also work in nearby towns such as London (14 miles north-west), Shoreditch (15 miles north-west), Hoxton (15 miles north-west), Whitechapel (14 miles north-west), Stockwell (13 miles north-west) and Wimbledon (15 miles west).
Around Chelsfield
Typical jobs here are in homes near St Olave's and St Saviour's Grammar School, Five Bells Public House and Harris Academy Orpington, among other places. The nearest railway station is Chelsfield station, roughly 0.8 miles west of the centre. A little further out are London Borough of Bromley Museum (1.7 miles north-west) and Orpington Hospital (1.4 miles west). Not far away are The Warren and Summer Hill.
Nearby places to Chelsfield
More services for Chelsfield
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We cut it out and start again.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How the visit works
Once we are on site, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. Most jobs then take a few hours in a single home. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Chelsfield. It helps if you can point us to a visitor permit or a bay close to the door.
- We start by going through the snagging items or plot schedule with you.
- Every bit of the old builder’s sealant is cut out, with no layer left behind.
- 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.
Preparing for the visit
- Let us know if you’ve seen damp or leaks
- Let us know about earlier repairs to the joints
- Let us know about parking restrictions
Get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
Advice
When to call us in Chelsfield
Later trades and the final clean can damage fresh sealant. A bead disturbed before it has cured may never seal properly and it shows once the home is in use.
Any of these means the joints need attention:
- Worktop and upstand sealant coming away
- Cracks appearing as a new home settles
- Sealant work across a run of new homes
- Leaking shower tray seals in a new home
Chelsfield is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Questions to ask before you book
- Which sealant they’ll use, and why
- When the joint can take water or movement
- Is the old sealant removed completely?
- How the surfaces are prepared before sealing
For landlords and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a one-year guarantee.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Questions from Chelsfield
Can parking be tricky for a visit in Chelsfield?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Can you do new build mastic in Chelsfield?
Yes. Our work covers London and the South East, and Chelsfield is part of that. You can ring 0345 464 0079 or send us an email and let us know what needs doing.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Will it make a mess?
Tidy work is part of the job. Nearby surfaces are protected, and the area is left clean when we finish.
When is the sealant fully cured?
It depends on the product and the conditions. We tell you how long to leave it before we go.
Do you work for developers?
Yes. We take on second-fix sealant work across new plots. Good preparation keeps snagging to a minimum.
Is the work guaranteed?
Yes, always. There’s a 12-month guarantee on every job, wherever you are.
How long will you be here?
It depends on the size of the job, but as a guide it takes a few hours for most snagging lists, longer for a run of plots. We’ll tell you when we quote.
How the job changes by surface
Show homes
In a show home, the sealant is on display. We lay neat, even beads in colours to suit the finishes.
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.
When something else is needed
We won’t take on work that will not last, so these are the limits:
- Deciding who is responsible under a builder’s warranty
- Structural cracks in walls or ceilings
- Damaged fittings that need replacing
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
Where we work in Chelsfield
- Windows & doors
- Skirting & floors
- Kitchens
- Bathrooms & en suites
- Show homes
- Plot handovers