Greater London · England
New-build mastic & snagging in Foxbury, Greater London
Specialist new build mastic for Foxbury: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Cracked sealant around new window and door frames
- Beads laid onto grit and dust from the build
- Messy sealant that spoils new finishes
New build mastic for homes and businesses in Foxbury
Dust is the enemy of new-build sealant. Each joint is cleaned of dust and primed where the product calls for it, so the sealant actually sticks instead of bonding to the dust. Common call-outs are for messy sealant that spoils new finishes and beads laid onto grit and dust from the build, across kitchens, windows & doors and bathrooms & en suites.
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, in Foxbury as anywhere.
There’s a 12-month guarantee on every job, large or small.
- Where
- Foxbury (DA14, BR7, DA15)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Work for landlords, hotels and businesses
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We have worked in hotels as well as homes and businesses.
We also work for property managers and facilities teams. Several sites can go on one quote, and we’re fully insured.
What affects the cost of new build mastic
Jobs vary more than people expect. The main factors:
- Whether the work is at height
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or drop us an email and we’ll talk you through it.
What to tell us for a quote
To help us quote quickly, let us know:
- Where the job is, and your postcode
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
Quotes start with a quick conversation. Describe the problem, the location and the size of the job. When it suits you, call 0345 464 0079 or send us an email.
Your questions about new build mastic in Foxbury
Is parking an issue for new build mastic in Foxbury?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Do you cover Foxbury for new build mastic?
Yes. Our work covers London and the South East, and Foxbury is part of that. You can ring 0345 464 0079 or email us and tell us what needs doing, and we will give you a clear quote.
How much does new build mastic cost in Foxbury?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. You will get a clear quote before work begins.
Are you insured?
Yes. Mr Mastic is fully insured.
Can I send you my snagging list?
Yes. Send us the sealant items on the list, with photos if you can, and we’ll quote. We will flag anything that needs another trade.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Does someone need to be in?
For indoor joints, yes, someone needs to let us in. Once we have agreed the job, you do not need to watch us work.
Do the sealants smell?
There can be a smell while the sealant cures, but it fades. Opening a window helps.
New build mastic around Foxbury
Many of London’s new homes are flats in bigger developments, where snagging may go through the developer or managing agent. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
As a London address, Foxbury can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Foxbury is about 1 mile east of Chislehurst, in Greater London. Every kind of property in Foxbury is covered for new build mastic, old or new, large or small. The work is guaranteed for a year. Across Greater London, we cover 764 places, and Foxbury is one of them. London is on our list too, about 10 miles from Foxbury.
Jobs for new build mastic in DA14, BR7 and DA15 works the same way as everywhere else we cover. That includes homes and businesses on Kemnal Road, Sydney Road and Carlton Road. Close by, we work in Longlands (1 mile north), Chislehurst (1 mile west), New Eltham (1 mile north-west), Elmstead (2 miles west) and Coldharbour (2 miles north-west). Within a short drive, we also cover London (10 miles north-west), City of Westminster (12 miles north-west), Marylebone (12 miles north-west), Kensington (14 miles north-west), St Pancras (12 miles north-west) and Shoreditch (10 miles north-west).
Landmarks near Foxbury
We work in homes and buildings around Chislehurst Common, Mead Road Infant School and The Bulls Head Public House. For rail, the closest station is Sidcup station, roughly 1.2 miles north-east of the centre. Nearby you’ll also find The Glades (3.3 miles west) and Queen Mary's Hospital (0.6 miles east). Open spaces near Foxbury include Summer Hill and The Tarn.
How to look after the new joints
To keep the joints looking good and working properly:
- Report sealant problems to your builder during the snagging period
- Keep pictures and emails about snagging items
- Avoid running a DIY bead over the old one
- Use the extractor fan every time you shower
Clean the sealant with a mild detergent and a soft cloth. Avoid abrasive pads and strong solvents, which can damage the surface.
A failed seal in a new home lets water into joists, plasterboard and ceilings. Early resealing keeps the job small and protects the rest of the house.
What sealant work cannot fix
Some problems need a builder, plumber or other trade rather than us:
- Plumbing faults behind the sealant
- Movement caused by a poorly fitted tray or bath
- Cracked trays, tiles or worktops
If you are not sure, just phone 0345 464 0079 or email us and we will give you a straight answer.
What we seal
- Bathrooms & en suites
- Show homes
- Plot handovers
- Kitchens
- Skirting & floors
- Windows & doors
What we do, step by step
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes anything from a few hours to several days, depending on the number of plots, depending on the amount of work. In Foxbury, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- We look at why each joint failed, including any movement.
- We remove the failed sealant and clean the joints.
- Joints are dried and primed where the product calls for it.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- We check every joint and leave you with the cure times.
How to prepare
- For business premises, tell us about site rules or sign-in
- Mention any leaks or damp you’ve noticed
- Let us know about earlier repairs to the joints
Get a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or email us.
Advice
Nearby places to Foxbury
What else we do in Foxbury
How the job changes by surface
Windows and doors
On new builds, external frame sealant can be patchy. It’s resealed with an exterior sealant suited to the frame and wall.
Bathrooms and en suites
Baths, showers, basins and trays in new bathrooms are the most common new-build reseal. The old sealant comes out and anti-fungal sanitary silicone goes in after cleaning and priming.
Do you need new build mastic in Foxbury?
Sealant applied onto damp surfaces does not bond well. On a busy site, joints are not always given time to dry first.
Signs it’s time to call us include:
- Gaps behind new kitchen upstands
- Beads laid onto grit and dust from the build
- New-build shower sealant that has already split
- Untidy sealant flagged on a snagging list
If you’ve bought a new home near Sidcup station, the sealant around baths, showers and frames is worth checking in the first year or two.
Before booking anyone
- How the surfaces are prepared before sealing
- How long to leave it before use
- How hidden problems are handled
- Whether VAT is included