Leaves Green mastic sealing
Mastic sealing for building owners, managing agents and housing associations throughout Leaves Green and nearby, carried out by CSCS-carded applicators. CHAS accredited and fully insured.
- A mix of products and colours from past repairs
- Open joints in brickwork or panels
- Estate-wide sealant that is simply worn out
Need mastic sealing in Leaves Green?
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Surface by surface
External movement joints
Brickwork, blockwork and panel joints let a building move. Once that sealant goes, rain can reach the wall.
Planned maintenance
How long mastic lasts depends on exposure, movement and the product used. Inspecting joints regularly keeps programmes on track.
How we handle mastic sealing in Leaves Green
For over 20 years we have resealed joints for owners, agents and landlords. Our applicators are CSCS-carded and we hold public liability insurance. Resealed mastic joints in Leaves Green carry our 12-month guarantee. We work on shopfronts below residential blocks, balcony and threshold joints and external wall and movement joints, and what we’re called in for most is patchy repairs in mismatched sealant and no planned programme for sealant. For commercial sealant work in Leaves Green, you deal with one contact from quote to sign-off, whether it’s one building or several.
Planning mastic work on a London block means notices to residents, access to flats and agreed working areas. Work is planned with the agent so residents get notice and access is arranged in advance.
Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and the quote explains what it covers.
- Place
- Leaves Green (BR2)
- Wider area
- Greater London
- Guarantee
- A 12-month guarantee
- Price
- A fixed quote before we start
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Looking after the joints
Sealant joints are maintenance items, and how long they last depends on how they’re treated. We suggest:
- Encourage occupiers to report problems at frames
- Avoid piecemeal callouts where you can
- Start inspections with the most exposed faces
- Have the asbestos survey to hand for older buildings
Where a paintable product was specified, it can be painted after curing. Silicone typically can’t be painted, so keep decorators off it.
The longer failed joints are left, the more likely the substrate edges break up. Once that happens, repairs come before resealing and the job grows.
Leaves Green: questions and answers
Will you take on a block within reach of Hayes (Kent) station?
Yes, and several blocks can go on one quote. We work to your notice and access arrangements.
Can you work in a London building with booked loading and goods-lift slots?
Yes, most London buildings have access rules of some kind, and we plan around them. Share the building’s contractor rules and we’ll work to them. The ULEZ covers the whole of Greater London, which we allow for
Who decides which product is used?
The specification comes first, if there is one. If there isn’t one, it comes down to the joint: its movement, its surfaces and what it has to cope with.
What paperwork can you provide?
Let us know your requirements: tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We are CHAS accredited and a Constructionline member.
Can weather delay the job?
For external joints, yes. The joint has to be dry and within the product’s temperature range, so frost, rain or cold mornings can delay outside work. Inside work is seldom held up.
What guarantee do you give on resealing?
Every building we reseal has a 12-month guarantee. It covers our workmanship, not later building movement, damage or frame failures.
Do you check for asbestos in old sealant?
We don’t remove asbestos-containing materials. If old sealant is suspected, work stops until it’s tested in line with the dutyholder’s asbestos management.
Towns and villages near Leaves Green
More services for Leaves Green
How a job runs
We begin with a short walk round with whoever looks after the building, agreeing which joints are in scope, where to start and what must stay open. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. Most London premises stay occupied while we are on site, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.
- A building-by-building inspection lists the failed joints.
- You get a fixed quote, per block or for the whole programme.
- Dates and areas are agreed so occupiers can be told.
- Failed sealant is removed and the faces prepared.
- New sealant goes in with backing rod and primer where needed.
- Each building is checked and signed off with the 12-month guarantee.
Getting the site ready
- Share your working hours and any access restrictions
- Send any specification or drawings in advance
- Share the asbestos register for older buildings
Ask for a quote
We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To ask for one, speak to us on 01277 525 020 or use the quote form.
Related advice
When it isn’t the sealant
A few problems need another trade or a different fix, and we say so rather than covering them up:
- Masonry that has broken away beside the joint
- Misted or failed double-glazed units
- Leaks through the frame itself rather than the perimeter
If you are not sure, just speak to us on 01277 525 020 or send photos by email and we will give you a straight answer before you book.
Surfaces we seal
- Shopfronts below residential blocks
- Window and door perimeters on blocks
- Balcony and threshold joints
- External wall and movement joints
- Communal kitchens and washrooms
- Communal entrances and stairwells
Work for main contractors and building owners
If you look after buildings for someone else, clear figures and clear communication matter. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.
Blocks and communal areas make up much of the work for housing associations and agents. We phase the work so people keep access, and each stage is agreed with your contact.
Looking after buildings in and around Leaves Green
London blocks come with residents to inform, access to agree and often a concierge or estate office to work with. We fit the programme to your notice periods.
Historic properties like Down House (to the east of Leaves Green) show the age of some local stock, where frame mastic must suit soft brick or stone. Property owners at sites such as Glebe Farm Business Park (to the north of Leaves Green) can have mastic renewed between lettings.
Leaves Green is about 4 miles south of Bromley, in Greater London. We cover commercial sites throughout Leaves Green. 764 places across Greater London fall within our area, Leaves Green among them. There’s a separate page for London, about 12 miles away.
Work on mastic joints is covered throughout BR2, for business premises of every kind. Buildings on Ashmore Lane and Main Road are within our area. If your building is just outside Leaves Green, we cover Farthing Street (1 mile north-east), Downe (1 mile east), Nash (1 mile north-west), Luxted (1 mile south-east) and Keston (2 miles north). Nearby towns on our patch include London (12 miles north-west), City of Westminster (15 miles north-west), Marylebone (15 miles north-west), Kensington (15 miles north-west), St Pancras (14 miles north-west) and Shoreditch (14 miles north).
Near you in Leaves Green
In Leaves Green, that means premises near The Kings Arms and South Park. The nearest railway station is Hayes (Kent) station, about 2.8 miles north of the centre. Nearby you’ll also find Bethlem Museum of the Mind (3 miles north) and Princess Royal University Hospital (2.2 miles north-east). Not far away are Nore Hill and West Kent Golf Course nature reserve.
When to call us in Leaves Green
Occasionally the substrate fails, not the sealant for example where render or brick edges crumble. If the edges are unsound, we say so before quoting the sealing.
These are often picked up first by site or facilities staff:
- Communal area joints that look neglected
- Estate-wide sealant that is simply worn out
- Movement joints with sealant missing
- Complaints coming in block by block
Schools and community buildings such as Meridian High School need frame and external mastic kept sound like any building.
Before you book anyone
- How long is the guarantee, and what does it include?
- Do they follow the manufacturer’s priming guidance?
- How they’ll work around occupants
- The named product and why it was chosen