Greater London · England
New-build mastic & snagging in Addington, Greater London
Professional new build mastic in and around Addington, with every bit of old sealant taken out first.
- Smeared, uneven beads picked up at snagging
- Sealant applied over dusty or wet surfaces
- Cracks appearing as a new home settles
How we handle new build mastic in Addington
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. We work on windows & doors, plot handovers and show homes, and the jobs we see most are messy sealant that spoils new finishes and cracks appearing as a new home settles.
New flats are going up across London, many of them in larger developments. Snagging there often goes through the developer or managing agent, and shower seals that fail early, skirting joints that open up and gaps at thresholds are all common snags.
We stand behind the work with a 12-month guarantee.
- Place
- Addington (CR0, CR2, BR4)
- Region
- Greater London
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Raise failed sealant with the developer while you’re covered
- Ventilate bathrooms well, especially in the first year
- Avoid running a DIY bead over the old one
- Act quickly if a seal starts to leak
Wipe the sealant with warm soapy water. Keep scourers and harsh chemicals off it, which can damage the surface.
Report failed sealant to the builder while you are in the snagging period. Once it ends, the repair may be down to you so report it promptly.
FAQs for Addington
Do you cover Addington for new build mastic?
Yes, Addington is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will send you a clear quote.
Do you work for landlords with property near West Wickham station?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice, and we’ll explain our choice.
Is there any odour?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
Should I go to my builder first?
Your builder, if you are still in their snagging or warranty period. After that, or if their repair keeps failing, we can do it and our work is guaranteed for a year.
Can you do plot mastic on a new development?
Yes. We take on second-fix sealant work across new plots. Good preparation keeps snagging to a minimum.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned before applying anything new.
Do you hold any approvals?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
Places near Addington
Also in Addington
What affects the quote in Addington
The quote reflects the job in front of us. We look at:
- How many areas need sealing
- Whether the work is at height
- The product the joint needs
- Whether there’s mould to deal with
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
What we need to know
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- The type of property
- The rough size of the job
- Any access issues, like height or stairs
- What the problem is, such as mould, gaps, leaks or cracking
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved and send you a clear quote.
Joints and finishes in Addington homes
Many of London’s new homes are flats in bigger developments, where snagging may go through the developer or managing agent. 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.
For new homes near West Wickham station, it’s worth checking the sealant early, while snags are still fresh. As a London address, Addington can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Addington is about 3 miles south-east of Ashburton, in Greater London. Anywhere in CR0, we cover new build mastic for homes and businesses. Addington is one of 764 places in Greater London where we work for new build mastic. We also work in London, about 10 miles from Addington.
Jobs for new build mastic in CR0, CR2 and BR4 works the same way as everywhere else we cover. New build mastic is available to properties on Lodge Lane, Falconwood Road and Addington Village Road. Other places close to Addington include Coney Hall (1 mile north), Forestdale (1 mile south), Spring Park (1 mile north), New Addington (1 mile south-east) and Selsdon (1 mile south-west). Further out, we also cover London (10 miles north), City of Westminster (12 miles north-west), Marylebone (12 miles north-west), Kensington (12 miles north-west), St Pancras (12 miles north) and Shoreditch (12 miles north).
What’s near Addington
Typical jobs here are in homes near Addington Park and John Ruskin College and the streets around them. The nearest railway station is West Wickham station, roughly 1.7 miles north-east of the centre. Well-known places in the area include National Psychosis Unit (1.6 miles north) and St George's Walk (3.1 miles west). Green spaces nearby include Bramley Bank and Duppas Hill.
What happens if it’s left?
Sealant done properly at handover means fewer callbacks. Snagging visits for failed sealant cost time on every plot, and they’re avoidable with good preparation. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Dealing with it early is far simpler.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why book with us
- Anti-fungal silicone where joints get wet
- ARBOMaster approved applicator
- We never seal over old sealant
- Sealant colour chosen to suit
Take a look at what affects the cost or our reviews.
Can I do it myself?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
Work for landlords, hotels and businesses
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Landlords and agents in Addington can book us as well as homeowners. Resealing between tenancies keeps a property looking cared for.
Honest limits
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Structural cracks in walls or ceilings
- A tray or bath that isn’t properly supported, until it’s fixed
- Your warranty claim itself, which is between you and the builder
Not sure which it is? You can call 0345 464 0079 or drop us an email and we’ll tell you honestly before booking.
What we seal
- Windows & doors
- Kitchens
- Skirting & floors
- Show homes
- Bathrooms & en suites
- Plot handovers
What we do, step by step
There is not much for you to do on the day. Show us the job and we will take it from there. The work itself 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. Mention any building rules, key holders or managing agents when you book.
- We go through the snagging list or plot schedule and agree the joints to do.
- We cut out every bit of the failed or messy sealant.
- We clean off dust from the build and prime the surfaces where the product needs it.
- New sealant suited to each joint is applied and tooled neatly.
- Finally, each room is checked and you’re given the cure time.
Before we arrive
- Mention any leaks or damp you’ve noticed
- Move anything stored near the joints
- Tell us if parking is tricky
Getting a quote
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or drop us an email and describe the job.