Greater London · England
New-build mastic & snagging in Crofton, Greater London
New build mastic for Crofton, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Smeared, uneven beads picked up at snagging
- Cracked caulk along new skirting
- Kitchen sealant that has pulled off the wall
Why it’s worth doing now in Crofton
A quick bead over the top of the old sealant can look fine at first, but it can’t bond to what’s underneath. A lasting seal starts with removing the old one completely. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and send you a clear quote before work begins.
What you get with us
- Any old sealant cut out fully, not covered over
- Domestic, commercial and hotel work
- Arbo and Everbuild products
- Over 20 years’ experience
Take a look at our cost guide and what customers say.
About our new build mastic in Crofton
New homes move as they dry out. Timber dries and shrinks, and baths and trays settle, and sealant applied in a hurry at handover can split. Common call-outs are for untidy sealant flagged on a snagging list and kitchen sealant that has pulled off the wall, on skirting & floors, plot handovers and windows & doors.
London homes range from new-build flats to period conversions with new floors laid over old boards. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Where
- Crofton (BR6, BR5)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
New build mastic around Crofton
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. Many of London’s new homes are flats in bigger developments, where snagging may go through the developer or managing agent.
If you’ve bought a new home near Orpington station, the sealant around baths, showers and frames is worth checking in the first year or two. Crofton is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Crofton is about 1 mile south-west of Orpington, in Greater London. For new build mastic in and around Crofton, it’s easy to get a quote: please phone 0345 464 0079 or email us. We cover Greater London from our Crawley base, Crofton included. Across Greater London, we cover 764 places, Crofton among them. Our London page covers work nearby, about 11 miles away.
Jobs for new build mastic in BR6 and BR5 works the same way as everywhere else we cover. Whether your property is on Grange Road, Reed Avenue and Gumping Road or a nearby road, our applicators can take on the job. Nearby, we also carry out new build mastic in Broom Hill (1 mile north-east), Locksbottom (1 mile west), Petts Wood (1 mile north), Farnborough (1 mile south) and Green Street Green (2 miles south). Within a short drive, we also cover London (11 miles north-west), City of Westminster (14 miles north-west), Marylebone (14 miles north-west), Kensington (15 miles north-west), St Pancras (14 miles north-west) and Shoreditch (12 miles north-west).
Near you in Crofton
We work in homes and buildings around The Priory School, Newstead Wood School and The Maxwell pub, among other places. Crofton has its own railway station: Orpington station. Well-known places in the area include Orpington Hospital (1.1 miles south-east) and Crofton Roman Villa (within half a mile south-east). Open spaces near Crofton include Summer Hill and The Warren.
What we do, step by step
There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The work itself takes a few hours in a single home from start to finish. In a London area like Crofton, the main things to plan are parking and access: let us know about parking, the floor we will be working on and any lift or shared entrance.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- We make sure the joints are dry and prime them if needed.
- Baths are filled with water, then the new sealant is applied.
- We check every joint and leave you with the cure times.
Getting ready for the visit
- Mention any tricky access
- Tell us if parking is tricky
- Tell us about any previous sealing or DIY attempts
Getting a quote
Want a quote for new build mastic? Please ring 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Related advice
Can I do it myself?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
For landlords and businesses
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together, and we are fully insured.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will quote.
Keeping the joints in good condition
How long the joints last depends on use and care. Here’s what we suggest:
- Avoid running a DIY bead over the old one
- Get a leaking seal dealt with straight away
- Avoid scourers and strong chemicals on sealant
- Use the extractor fan every time you shower
Keep an eye on the joints over the first couple of years. Small gaps can appear as the house dries.
Early snagging is easier snagging. Small faults turn into leaks if left in a busy bathroom.
What the job involves on each surface
Kitchens
Worktops in new homes can move slightly as the house dries, opening gaps behind the upstand. A fresh flexible bead closes them.
Bathrooms and en suites
New-build bathrooms and en suites are where sealant fails most often. We cut out the failed bead, clean and prime, and reseal with anti-fungal sanitary silicone.
Common questions in Crofton
Can you do new build mastic in Crofton?
Yes, Crofton is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or email us with a few details of the job.
Is parking an issue for new build mastic in Crofton?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
How long should I leave it?
It depends on the product and the temperature. Before we leave, we’ll tell you the cure time.
Can you do plot mastic on a new development?
Yes. We carry out plot mastic and second-fix sealing for builders and developers. Send the schedule and any specification and we will give you a quote.
Can tenants book the work?
We’re happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
Do you remove the old sealant?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and you will get one quote.
Is it messy?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
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What affects the cost of new build mastic
For a quick quote, just ask. What matters most is:
- The number of rooms or windows
- Whether there’s mould to deal with
- The number and length of the joints
- Whether the work is at height
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
What we need to know
When you contact us, these details help:
- Roughly how big the job is
- The problem you’ve noticed
- Photos by email, if that is easy
- Any access issues, like height or stairs
For new build mastic in Crofton, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before work begins.