Greater London · England
Biggin Hill New Build Mastic
Plot mastic for developers and snagging failed sealant in new homes for homes and businesses in Biggin Hill and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Untidy sealant flagged on a snagging list
- Sealant that never bonded to the surface
- Cracked caulk along new skirting
When it is not the sealant
Some problems need a builder, plumber or other trade rather than us:
- Deciding who is responsible under a builder’s warranty
- Cracked trays, tiles or worktops
- A tray or bath that isn’t properly supported, until it’s fixed
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
Joints and surfaces we work on
- Show homes
- Bathrooms & en suites
- Skirting & floors
- Plot handovers
- Windows & doors
- Kitchens
How we handle new build mastic in Biggin Hill
In a new home, every joint should have a clean, even bead. Smeared, patchy or cracked sealant is worth sorting early, before water reaches anything behind it. We work on show homes, windows & doors and kitchens, and common reasons people get in touch are new-build shower sealant that has already split and gaps opening as the house dries out and settles.
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, in Biggin Hill as anywhere.
We stand behind the work with a 12-month guarantee.
- Where
- Biggin Hill (TN16, BR6)
- Region
- Greater London
- Cover
- One year on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
Show homes
In a show home, the sealant is on display. Every bead is neat and coloured to suit the room.
Windows and doors
Draughts around new frames are often a sealant gap. We check and reseal the frame edges.
Can I do it myself?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Also near Biggin Hill
What else we do in Biggin Hill
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
How to look after the new joints
How long the joints last depends on use and care. Here’s what we suggest:
- Keep pictures and emails about snagging items
- Act quickly if a seal starts to leak
- Clean sealant with mild detergent, not abrasives
- Use the extractor fan every time you shower
Wipe the sealant with warm soapy water. Avoid abrasive pads and strong solvents.
The sooner you deal with untidy or cracking sealant, the less there is to put right. Left alone, a small crack can become a leak in a busy bathroom.
What new build mastic looks like in Biggin Hill
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent.
Biggin Hill is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Biggin Hill is about 6 miles east of Caterham, in Greater London. From the centre of Biggin Hill to the outskirts, we cover new build mastic for every kind of property. Our area takes in 764 places across Greater London, from the larger towns to small villages. There’s also a page for London, roughly 14 miles from Biggin Hill.
We cover every part of TN16 and BR6 for new build mastic. New build mastic is available to properties on Rushdene Walk, Mount Pleasant and Stock Hill and the roads around them. Biggin Hill sits on or near the A233, which makes travel easy. We also cover Aperfield (1 mile south-east), Luxted (1 mile north-east), Berry's Green (1 mile east), Single Street (1 mile east) and Leaves Green (2 miles north). We also work in nearby towns such as London (14 miles north-west), Whitechapel (15 miles north), Brompton (15 miles north-west), Stockwell (13 miles north-west), Orpington (6 miles north-east) and Wimbledon (13 miles north-west).
Landmarks near Biggin Hill
Around Biggin Hill, our work takes us to homes and buildings near Charles Darwin School, among other places. For rail, the closest station is Woldingham station, roughly 3.8 miles south-west of the centre. A little further out are Warlingham Park Hospital (2.7 miles west). The countryside around Biggin Hill includes Betsom's Hill and West Kent Golf Course nature reserve.
Common questions in Biggin Hill
I let a flat near Woldingham station. Can you help?
Yes. We work for letting agents and landlords as well as householders. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll send you a clear quote.
Can you do new build mastic in Biggin Hill?
Yes. We work across London and the South East, and Biggin Hill is part of that. You can call 0345 464 0079 or email us and let us know what needs doing, and we will send you a clear quote.
Are you an approved applicator?
Yes. We’re approved under the ARBOMaster scheme.
How do I get a quote for new build mastic in Biggin Hill?
The cost depends on the size of the job, access and how much old sealant has to come out. Call for a quick quote and we will talk you through it.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. Indoors, that generally means someone at home.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Can I send you my snagging list?
Yes. Send the list and a few photos of the sealant items. We will tell you if anything on it isn’t a sealant job.
Should I wait before resealing?
For failed seals that let water through, the best time is now. Cosmetic gaps can wait until the first year or two of movement has passed.
When to call us in Biggin Hill
Sealant is often one of the last jobs before handover. Dusty, unprimed joints are common, so the bead never bonds properly.
Keep an eye out for these signs:
- Smeared, uneven beads picked up at snagging
- New-build shower sealant that has already split
- Sealant work across a run of new homes
- Beads laid onto grit and dust from the build
For new homes near Woldingham station, it’s worth checking the sealant early, while snags are still fresh.
Comparing quotes
- Whether they’re fully insured
- How much experience the applicator has
- What the cure time is
- Whether you can choose the colour
How it works
There is not much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes anything from a few hours to several days, depending on the number of plots, including the tidy-up. 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.
- First, the list of joints is agreed from your snagging sheet or plot schedule.
- 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.
- We prime where needed and apply a sealant suited to each joint.
- Each bead is tooled and the cure times explained.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Tell us about any previous sealing or DIY attempts
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
If you are in Biggin Hill and need new build mastic, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.