Greater London · England
New-build mastic & snagging in Southborough, Greater London
Professional new build mastic in and around Southborough, with every bit of old sealant taken out first and a 12-month guarantee.
- New-build shower sealant that has already split
- Sealant applied over dusty or wet surfaces
- Gaps behind new kitchen upstands
Southborough questions
Can you do new build mastic in Southborough?
Yes. We work across London and the South East, and Southborough is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear price.
Do you work for landlords with property near Bickley station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before we start.
Can new sealant go on top of the old bead?
No. Over-sealing traps mould and water and soon fails. We remove every bit of the old bead before resealing.
How long does the job take?
Most jobs take anything from a few hours to several days, depending on the number of plots. We’ll confirm how long when we quote.
How long should I leave it?
That depends on the sealant used, so please follow the time we give you.
Do I need to be at home?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Why has my new-build shower seal failed already?
Lots of new homes see sealant crack early, because the house is drying and settling. Rushed application on dusty surfaces makes it worse.
Can I send you my snagging list?
Yes. Send the list and a few photos of the sealant items and we’ll give you a quote. We will flag anything that needs another trade.
New build mastic for homes and businesses in Southborough
Developers send us the plot schedule and we work through it. We seal bathrooms, kitchens, windows, doors and skirting so plots are ready to hand over. If you are dealing with messy sealant that spoils new finishes and skirting joints opening in the first winter, we can help, on kitchens, bathrooms & en suites and plot handovers alike.
New flats are going up across London, many of them in larger developments. In a new development, snags are often reported through the developer or the managing agent, and shower seals that fail early, skirting joints that open up and gaps at thresholds are all common snags.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Location
- Southborough (BR2, BR1)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why act early in Southborough
Small cosmetic gaps can wait for the house to settle, but a leaking seal can’t. Not sure whether yours can wait? You can call 0345 464 0079 or drop us an email with a few pictures and we will give you a straight answer. In a flat in Southborough, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Homes and businesses are quoted the same way: 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’ll go through it with you.
Why Southborough customers choose us
- 180+ five-star Google reviews
- We never seal over old sealant
- A sealant colour to suit the surroundings
- 20+ years of sealant experience
New homes and floors in Southborough
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.
As a London address, Southborough can be tricky for parking: let us know about parking bays, permits or a driveway.
Southborough is about 2 miles south-east of Bromley, in Greater London. For new build mastic in and around Southborough, it’s easy to get a quote: please phone 0345 464 0079 or email us. We cover Greater London from our Crawley base. Across Greater London, we cover 764 places, and Southborough is one of them. Our London page covers work nearby (10 miles or so).
Every address in BR2 and BR1 is within our area for new build mastic, from the main roads to the quietest streets. Streets in the area include Pope Road, Crown Lane and Union Road, and we cover them all. Other places close to Southborough include Bromley Common (1 mile south-west), Petts Wood (1 mile east), Locksbottom (2 miles south-east), Shortlands (2 miles west) and Crofton (2 miles south-east). Further out, we also cover London (10 miles north-west), City of Westminster (12 miles north-west), Marylebone (12 miles north-west), Kensington (13 miles north-west), St Pancras (12 miles north-west) and Shoreditch (11 miles north-west).
Around Southborough
Locally, jobs take us to homes and businesses close to Bishop Justus CofE School, Jubilee Country Park and The Chequers Public House and the streets around them. The nearest railway station is Bickley station, about 0.7 miles north of the centre. A little further out are Bethlem Museum of the Mind (0.9 miles south-west) and Bridgeways Day Hospital (under half a mile south). The countryside around Southborough includes Summer Hill and Downham Woodland Walk.
Towns and villages near Southborough
More services for Southborough
For landlords and businesses
Businesses can book us for washrooms, kitchens, offices and more. For commercial premises, we can talk through working times when we quote.
We work for landlords and agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order.
Looking after it afterwards
Once the sealant has cured, a few habits help it last:
- Don’t seal over failed sealant yourself
- Watch for new gaps as the house dries out
- Ventilate bathrooms well, especially in the first year
- Photograph failed sealant before it’s redone
Keep photos of the joints and any snagging correspondence with your builder. It helps if anything else comes up during the warranty period.
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.
What we’re called out for in Southborough
A new house holds a lot of water from the build, and it dries out over the first couple of years. Drying timber shrinks and pulls joints apart and the sealant has to cope with the movement.
People normally contact us after spotting one of these:
- Gaps opening as the house dries out and settles
- Sealant applied over dusty or wet surfaces
- Kitchen sealant that has pulled off the wall
- Frame joints opening as the plaster dries
For new homes near Bickley station, it’s worth checking the sealant early, while snags are still fresh.
Comparing quotes
- Who turns up on the day
- Whether the sealant suits the joint
- How hidden problems are handled
- Whether they seal over old material or remove it
What we do, step by step
A visit follows a simple pattern: we look at the joints together, protect the area around them, carry out the job and clear up. It generally takes anything from a few hours to several days, depending on the number of plots. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- First we work through your snagging list or plot schedule with you.
- Failed or untidy sealant is cut out completely.
- Surfaces are cleaned of building dust and primed where needed.
- We apply a sealant that suits each joint and tool it to a neat finish.
- We check every joint and tell you how long each needs to cure.
How to prepare
- Keep children and pets away from the work area
- Move anything stored near the joints
- Let us know about stairs, lifts or work at height
Get a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or send us an email.
Related advice
What affects the quote in Southborough
We quote each job individually. These are the things that affect it:
- The size of the job
- Working hours on commercial sites
- How many rooms, windows or areas are involved
- Whether the work is at height
The cost reflects the work involved, not a rough estimate. That is why we ask a few questions first.
What we need to know
When you contact us, it’s useful to know:
- Any previous sealing or DIY work
- Roughly how big the job is
- The problem you’ve noticed
- The address or postcode of the job
Getting a quote is simple: let us know what needs doing and where and its rough size. A few photos by email make the job easier to understand, and we’ll take it from there.
Honest limits
Before booking, it’s worth knowing the limits:
- Broken tiles or a split tray
- Deciding who is responsible under a builder’s warranty
- A tray or bath that is not properly supported, until it’s fixed
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
What we seal
- Kitchens
- Bathrooms & en suites
- Skirting & floors
- Windows & doors
- Plot handovers
- Show homes