Greater London · England
Falconwood New Build Mastic
Problem with your new-build sealant joints in Falconwood? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Smeared, uneven beads picked up at snagging
- Plot mastic for developers ahead of handover
- Internal frame sealant that has split
When it isn’t the sealant
New sealant cannot fix everything, and we’d rather say so up front. It will not solve:
- Baths and trays that move too much for sealant to cope with
- Deciding who is responsible under a builder’s warranty
- Cracking that points to a structural problem
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Bathrooms & en suites
- Skirting & floors
- Plot handovers
- Kitchens
- Windows & doors
- Show homes
New build mastic for homes and businesses in Falconwood
A new house keeps drying out and settling for its first couple of years. Timber dries and shrinks, and baths and trays settle, and sealant applied in a hurry at handover can split. If you have skirting joints opening in the first winter and frame joints opening as the plaster dries, we can help, on plot handovers, bathrooms & en suites and kitchens alike.
London homes range from new-build flats to period conversions with new floors laid over old boards. Every joint between floor, skirting and threshold has to cope with some movement.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Falconwood (DA16, DA15, SE9)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
FAQs for Falconwood
Is Falconwood in your area for new build mastic?
Yes. Our work covers London and the South East, and Falconwood is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing.
Is parking a problem for a job in Falconwood?
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.
Does someone need to be in?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
What does new build mastic cost?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we will talk you through it.
Who should fix failed sealant in a new build?
If you’re still within the builder’s snagging or warranty period, report it to them first. If it is not sorted, or keeps failing, get in touch with us.
Can landlords and businesses book you?
Yes, we do. Domestic, commercial and hotel work are all part of what we do, and we are fully insured.
Can you work on commercial sites?
Yes, regularly. We can plan bigger jobs in stages to suit the site.
Is the work guaranteed?
Yes. Each job is guaranteed for twelve months, large or small.
How the visit works
Most of a good job is in the preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a few hours for most snagging lists, longer for a run 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 start by going through the snagging items or plot schedule with you.
- The failed sealant is removed completely.
- 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.
Getting ready for the visit
- Clear the area around the work
- Mention any sign-in or site rules at work premises
- Mention any leaks or damp you’ve noticed
Ask for a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or email us.
Related advice
Looking after it afterwards
So the new joints stay in good condition:
- Wipe joints with warm soapy water
- Act quickly if a seal starts to leak
- Ventilate bathrooms well, especially in the first year
- Check bath and shower seals every few months as the house settles
Follow the cure time we give you before the area gets wet. Silicone is normally left for about a day to cure enough for use.
Report failed sealant to the builder while you’re in the snagging period. Once it ends, the repair may be down to you so report it promptly.
Different surfaces, different methods
Kitchens
New-kitchen sealant is often applied in a rush. We take it out and reseal neatly, colour-matched where it shows.
Windows and doors
Draughts around new frames are often a sealant gap. We look at the joints and reseal where needed.
Joints and finishes in Falconwood homes
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. Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent.
If you’ve bought a new home near Welling station, the sealant around baths, showers and frames is worth checking in the first year or two.
Falconwood is about 2 miles north-east of Eltham, in Greater London. Homes, rented property, offices and hotels in Falconwood is covered for new build mastic. The work is guaranteed for a year. 764 places in Greater London are on our list, large and small. We also work in London, around 9 miles away.
Our applicators cover all of DA16, DA15 and SE9 for new build mastic. Local streets include Hook Lane, Gordon Road and Kent Avenue, all of which we cover. Nearby, we also carry out new build mastic in Blackfen (1 mile south), East Wickham (1 mile north), Avery Hill (1 mile south-west), Shooter's Hill (1 mile north-west) and New Eltham (2 miles south-west). We also work in nearby towns such as London (9 miles west), City of Westminster (11 miles west), Marylebone (11 miles west), Kensington (13 miles west), St Pancras (10 miles north-west) and Shoreditch (9 miles north-west).
Local landmarks in Falconwood
Around Falconwood, our work takes us to homes and buildings near The Plough and Harrow pub, Shoulder of Mutton Green and Harris Academy Falconwood, among other places. The closest station to Falconwood is Welling station, roughly 0.5 miles north-east of the centre. A little further out are Broadway Shopping Centre (2.2 miles east) and Memorial Hospital (1.4 miles north-west). The countryside around Falconwood includes The Tarn and Summer Hill.
What we are called out for in Falconwood
The first winter with the heating on dries a new home quickly. Skirting, frames and worktops pull away slightly and cracked sealant shows up.
Keep an eye out for any of the following:
- Smeared, uneven beads picked up at snagging
- Frame joints opening as the plaster dries
- Sealant work across a run of new homes
- Skirting joints opening in the first winter
Falconwood is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Questions to ask before you book
- What preparation is included
- Who turns up on the day
- What happens if the job turns out different
- Whether the sealant suits the joint
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Also near Falconwood
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What affects the quote in Falconwood
For a quick quote, just ask. The main things that affect it are:
- How many rooms, windows or areas are involved
- The number and length of the joints
- Whether the work is at height
- Whether old sealant or filler has to be cut out
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or email us.
Helping us quote
Before you ask for a quote, have a think about:
- The rough size of the job
- Whether it has been sealed before
- Whether it’s a home or a business
- The problem you’ve noticed
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. When it suits you, call 0345 464 0079 or drop us an email.