Mastic Sealing in Brockley
We carry out mastic sealing for building owners, managing agents and housing associations in Brockley. Send photographs or drawings for a fixed quote.
- Movement joints with sealant missing
- Cracked, hardened mastic round windows on a block
- Worn sealant at communal door frames
Need mastic sealing in Brockley?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Blocks and managed buildings in Brockley
Brockley has three care or nursing homes no more than 2 miles away. Care home owners need frame and external mastic kept sound without unsettling residents. London blocks come with residents to inform, access to agree and often a concierge or estate office to work with. Our programme follows the access you agree with residents.
For owners of several units at places like Clyde Vale Industrial Estate, 1.5 miles south-west of Brockley, one programme can deal with frame and external mastic across the lot. Trustees of buildings like Church of St Hilda can bring frame and external mastic into a planned maintenance list. Student accommodation around universities such as University of Greenwich - Greenwich Campus, 2.3 miles north-east of Brockley, is normally managed block by block, which suits a planned mastic programme.
Brockley is about 1 mile south of New Cross, in Greater London. Across the SE4 postcode area, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. Across Greater London, 764 places are covered, including Brockley.
Work on mastic joints is covered throughout SE4, SE23 and SE6. Buildings on Ivy Road, Nash Road and Lindal Road are within our area for mastic joints. If your building is just outside Brockley, we cover Crofton Park (1 mile south-east), Honor Oak (1 mile west), Ladywell (1 mile east), Forest Hill (1 mile south-west) and Nunhead (1 mile north-west). Bigger towns within reach include London (4 miles north-west), City of Westminster (7 miles north-west), Marylebone (7 miles north-west), Kensington (8 miles north-west), St Pancras (6 miles north-west) and Shoreditch (5 miles north).
Local landmarks in Brockley
Around Brockley, our work takes us to commercial buildings near Blythe Hill Tavern, Allenby Tutorial Trust and Blythe Hill Fields, among other places. Brockley has its own railway station: Crofton Park station. Nearby you’ll also find Horniman Museum and Gardens (1.4 miles south-west) and University Hospital Lewisham (0.7 miles east). For a walk, there’s One Tree Hill and Knight's Hill.
About our mastic sealing in Brockley
Managing agents and housing associations normally need paperwork before anyone starts. For documents, tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote. We are CHAS accredited and a Constructionline member, with public liability insurance. Site teams most often ask us about a mix of products and colours from past repairs and window mastic that has split and shrunk, across communal entrances and stairwells, window and door perimeters on blocks and communal kitchens and washrooms. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Brockley, that means joint design, primers and backing rod as standard.
Across Greater London, Brockley included, the ULEZ applies, and parking and loading rules differ from street to street. For block-wide work, a place to park and store materials saves time on every visit.
Every job we finish is backed by a 12-month workmanship guarantee. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Where
- Brockley (SE4, SE23, SE6)
- Region
- Greater London
- Guarantee
- 12 months on our workmanship
- Quotes
- A fixed quote before we start
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
From enquiry to sign-off
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. Then we strip out anything that has failed, prepare every joint and seal it. For a job in Brockley, access comes first. Send the building rules and access times with your enquiry.
- We inspect each building and record the joints that have failed.
- The quote is fixed and split as suits you.
- Dates and areas are agreed so occupiers can be told.
- Failed sealant is removed and the faces prepared.
- Joints are resealed and tooled.
- Each building is checked and signed off with the 12-month guarantee.
What we need from you
- Send asbestos survey details if the building is pre-2000
- Confirm the product named in the specification
- Tell staff and tenants when we’ll be in
Quotes
Photos, drawings or a schedule of the joints and a fixed quote comes back to you. Where a site visit makes more sense, we’ll arrange one.
Related advice
What sealant work can’t fix
Honesty saves time and money. New sealant won’t cure:
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
- Frames that are rotten, warped or broken
- Substrate edges that need repairing first
If in doubt, ring 01277 525 020 or send details through our quote form and we will say what we think before you book.
Where we work in Brockley
- External wall and movement joints
- Balcony and threshold joints
- Shopfronts below residential blocks
- Window and door perimeters on blocks
- Communal entrances and stairwells
- Communal kitchens and washrooms
Different surfaces, different methods
Commercial and mixed-use buildings
Commercial occupiers normally stay open during the work, so we plan around them.
Window and door perimeters on blocks
Perimeter joints on blocks are best done elevation by elevation or block by block. How each joint is reached is agreed at quote stage.
Owners, agents and contractors
CHAS accredited and a Constructionline member, we are straightforward to vet for your supplier list. We’re fully insured, and our insurance certificate can go with the quote.
Facilities managers want contractors who arrive with the paperwork sorted. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.
FAQs: Brockley
Will you take on work at estates like Clyde Vale Industrial Estate, close to Brockley?
Yes, sites like Clyde Vale Industrial Estate are within our area, along with the rest of Brockley. Photos and a short description are enough for a first look.
Do you work in London buildings with loading restrictions?
Yes, we plan every London job around the building’s own access rules. Say when the building is occupied and when it’s quiet, and we’ll plan accordingly. The ULEZ covers the whole of Greater London, which we allow for
Do you cover Brockley?
Yes. We cover Brockley and the rest of Greater London. For a quote, call the office on 01277 525 020 or email drawings and photos.
Can you seal joints high up on a block?
Every block is different. How upper joints are reached is agreed before work is booked so the fixed quote reflects it.
Can people stay in the building while you reseal?
We plan around people living or working in the building. Dates and areas are agreed with you so residents or tenants can be told, and entrances stay in use.
Who decides which product is used?
If the job is specified, we follow the specification. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
When is resealing likely to be due?
Nobody can honestly give a figure in years, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular inspection is the best way to catch problems early.
Leave it or put it right?
Open external joints let water into walls and around frames. That can lead to damp, staining and damage to finishes, which is harder to deal with than resealing. Repeat call-outs disrupt occupied London buildings, so a proper job first time, with the old sealant fully removed, is worth it.
Larger quantities, tricky access or phasing all shape the price. So do site requirements such as inductions and permits, along with the time of year for external work.
Why clients in Brockley choose us
- Workmanship guaranteed for 12 months
- Colours chosen to suit frames, cladding or finishes where possible
- A fixed quote before work starts
- Coloured sealants to suit the setting, where available
Also near Brockley
More services for Brockley
Doing it in-house
Some joints are best left to specialists: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong typically costs more in the end than doing them right.
General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.