Mastic Sealing in Barnehurst
Our CSCS-carded applicators take on mastic sealing for building owners, managing agents and housing associations in Barnehurst and the surrounding area. Send details for a fixed quote.
- Estate-wide sealant that is simply worn out
- Leaks at window and door perimeters
- Window mastic that has split and shrunk
Need mastic sealing in Barnehurst?
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Mastic sealing in Barnehurst, done properly
For over 20 years we have resealed joints for owners, agents and landlords. Every applicator holds a CSCS card, and the work is backed by public liability insurance. Each building we complete carries a 12-month guarantee on our workmanship. The enquiries we see most involve draughts at frames across a block and water getting in round frames after rain, across external wall and movement joints, communal kitchens and washrooms and balcony and threshold joints. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Barnehurst, preparation and product choice get the time they need.
For managing agents in Barnehurst, resident access, notice periods and the building’s rules shape the job. Work is planned with the agent so residents get notice and access is arranged in advance.
A 12-month guarantee applies to all our work. If an installation problem shows up, ring 01277 525 020 or email us and we will arrange a return visit.
- Place
- Barnehurst (DA7, DA1, DA8)
- Region
- Greater London
- Cover
- 12 months on our workmanship
- Price
- Quoted before any work starts
- Call
- 01277 525 020
- Page updated
- 3 November 2026
Owners, agents and contractors
We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Sites in Barnehurst can sit alongside others in a wider programme.
Housing associations and managing agents often need work done across blocks and communal areas. We phase the work so people keep access, with each stage agreed with your site contact.
Questions about Barnehurst
Do you work for managing agents with blocks near Barnehurst station?
Yes. Blocks of any size are within what we do. Send the address, photographs of the elevations and your access arrangements, and we will give a fixed quote.
Do you work in London buildings with loading restrictions?
Yes, we plan every London job around the building’s own access rules. The building manager’s rules go straight into our method. All of Greater London is inside the ULEZ, and our planning allows for it
Can you take on resealing for a block portfolio?
Yes, block and estate work is a core part of what we do. Buildings are scheduled in turn so you can plan around it.
Does the weather affect the work?
It can, when the joints are outside. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so we watch the forecast and rearrange outside work if we have to. Indoors, the weather is rarely a problem.
Will residents or tenants be disturbed?
Occupiers stay in the building throughout. If any flats or units need access, we’ll tell you in advance so it can be arranged.
How do you choose the sealant?
If the job is specified, we follow the specification. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.
Can you work to our specification?
Yes. We follow the specification, along with the manufacturer’s installation guidance.
General trades versus a specialist
There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and our CSCS-carded applicators are used to working under those rules.
For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint, which is what makes a joint last.
Planned mastic for Barnehurst portfolios
London blocks come with residents to inform, access to agree and often a concierge or estate office to work with. We plan around the notices and access you arrange.
Student accommodation around universities such as University of Greenwich Avery Hill Campus, 4 miles west of Barnehurst, is usually managed block by block, which suits a planned mastic programme. For a school such as Mayplace Primary School, perimeter mastic on windows and doors is a holiday job.
Barnehurst is about 3 miles east of Welling, in Greater London. Barnehurst sits inside our coverage and the rest of Greater London, with the same fixed quotes and 12-month guarantee as everywhere else. Our Greater London coverage takes in 764 places, large and small. There’s a separate page for London, about 12 miles away.
We take on mastic joints across the DA7, DA1 and DA8 postcode area, whatever the building. Buildings on Old Road, Grove Road and Manor Road are within our area for mastic joints. Access to Barnehurst is via the A2000 among other routes, so getting applicators and materials to site is simple. If your building is just outside Barnehurst, we cover Bexley Riverside (1 mile north), Northumberland Heath (1 mile north), Crayford (1 mile south-east), North End (1 mile east) and Barnes Cray (1 mile east). Nearby towns on our patch include London (12 miles west), City of Westminster (14 miles west), Marylebone (14 miles west), St Pancras (13 miles west), Shoreditch (12 miles north-west) and Walthamstow (12 miles north-west).
What’s near Barnehurst
We work on buildings around St Catherine's Catholic School, St Catherine's Catholic School and Braeburn Park and the streets around them. The closest station to Barnehurst is Barnehurst station, roughly 0.5 miles north-west of the centre. A little further out are Stone Castle (4.8 miles east) and Bexley Museum (1 mile south). Open spaces near Barnehurst include Wansunt Pit.
Nearby places to Barnehurst
Other services in Barnehurst
What the job involves on each surface
External movement joints
Movement joints are cleaned out, backed with rod and resealed with a sealant of the right movement class.
Estate-wide resealing programmes
A programme can start with the worst buildings and work down. You get one fixed quote per building or for the whole estate.
From enquiry to sign-off
A typical day starts with protection: masking tape along the joint edges and sheeting over anything nearby. The work itself usually takes a few days for most blocks, with larger programmes scheduled building by building, and we clear our waste as we work. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- We check the asbestos register for older buildings and look at the joints.
- The products and programme are set out in a fixed quote.
- We strip out the old sealant.
- The joints are prepared and resealed with the right product.
- Buildings are completed in turn.
Before we start on site
- Share your working hours and any access restrictions
- Send any specification or drawings in advance
- Agree which areas must stay open
Get a fixed quote
Photos, drawings or a schedule of the joints are often enough for a fixed quote. If the job needs a look first, we will arrange a site visit.
Read more
Signs you need mastic sealing in Barnehurst
Poor preparation explains many failed joints. Where the faces weren’t cleaned or primed as specified, the bead peels off one side.
It’s worth sending us details if you spot any of the following:
- Estate-wide sealant that is simply worn out
- Draughts at frames across a block
- Communal area joints that look neglected
- Damp patches beside frames
Property owners at sites such as Bourne Industrial Park (0.7 miles south of Barnehurst) can have mastic renewed between lettings.
What to look for in a quote
- Their public liability cover
- Can the work be phased to keep areas open?
- Whether their applicators hold CSCS cards
- What the guarantee covers, and for how long
Maintenance after handover
A few simple habits keep the new joints working:
- Mention RAMS, insurance or CSCS requirements up front
- Encourage occupiers to report problems at frames
- Avoid piecemeal callouts where you can
- Include mastic in your cyclical inspections
Include sealant in planned building inspections. Watch for splits, open gaps, hard or chalky surfaces and mastic pulling away and record where they are.
Planned resealing is easier to budget than emergency repairs. A programme can start with the worst buildings and work down the list.