Longlands mastic sealing
Need mastic sealing in Longlands? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- Cracked, hardened mastic round windows on a block
- A mix of products and colours from past repairs
- Damp patches beside frames
Mastic sealing across Longlands
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
How we handle mastic sealing in Longlands
For over 20 years we have resealed joints for owners, agents and landlords. Every applicator holds a CSCS card and we hold public liability insurance. Resealed mastic joints in Longlands carry our 12-month guarantee. Most enquiries involve window mastic that has split and shrunk and a mix of products and colours from past repairs, across communal kitchens and washrooms, shopfronts below residential blocks and window and door perimeters on blocks. A single leaking joint is often how a building in Longlands first comes to us: we look at the rest while we are there and tell you what we find.
For managing agents in Longlands, 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.
Our workmanship is guaranteed for 12 months, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Place
- Longlands (DA15, DA14, SE9)
- Wider area
- Greater London
- Cover
- A 12-month guarantee
- Quotes
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Page updated
- 3 November 2026
Mastic sealing around Longlands: what changes locally
In London, mastic work on a block goes through the managing agent or landlord, with notice to residents. We fit the programme to your notice periods. Longlands has 17 care or nursing homes no more than 2 miles away. Care home owners need frame and external mastic kept sound without unsettling residents.
For a school such as Longlands Primary School, perimeter mastic on windows and doors is a holiday job. For agents with blocks near New Eltham station (0.8 miles north-west of Longlands), a block-wide mastic programme deals with frames, balconies and entrances in one go. Trustees of buildings like Christ Church can bring frame and external mastic into a planned maintenance list.
Longlands is about 1 mile west of Sidcup, in Greater London. We cover Longlands and the rest of Greater London, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Longlands is one of 764 places we cover in Greater London for mastic joints. Our London page has more on work in that area (9 miles or so).
Postcode districts covered here: DA15, DA14 and SE9. Streets here include Main Road, Alder Road and Sidcup Road. With the A211 nearby, Longlands is straightforward for us to reach. Close to Longlands, our area also takes in Foxbury (1 mile south), New Eltham (1 mile north-west), Chislehurst (1 mile south-west), Coldharbour (1 mile west) and Blackfen (1 mile north). Nearby towns on our patch include London (9 miles north-west), City of Westminster (12 miles north-west), Marylebone (12 miles north-west), Kensington (13 miles west), St Pancras (11 miles north-west) and Shoreditch (10 miles north-west).
Local landmarks in Longlands
Around Longlands, our work takes us to commercial buildings near Waring Park, Chislehurst School for Girls and Ye Olde Black Horse Inn, among other places. The nearest railway station is New Eltham station, roughly 0.8 miles north-west of the centre. Nearby you’ll also find Queen Mary's Hospital (1 mile south-east) and Greenwich Castle (5 miles north-west). The countryside around Longlands includes Summer Hill and The Tarn.
On site: what to expect
Tell us your site hours and access windows and we’ll plan around them. While we are working, the area stays contained and tidy, and we check in with your contact before moving on to each new area. 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 inspect each building and record the joints that have failed.
- The quote is fixed and split as suits you.
- We agree the programme and dates with you.
- Old mastic is removed and the joint faces prepared.
- New sealant goes in with backing rod and primer where needed.
- We check the finished work and confirm the guarantee.
What we need from you
- Agree which areas must stay open
- Clear stock, furniture or equipment away from the joints
- Flag any permit to work we’ll need
Quotes
Let us know the site, the scope and your timescale, and a fixed quote will follow. To get it moving, phone 01277 525 020 or email a schedule or drawings.
Related advice
Site staff or a sealant specialist?
There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and we will confirm the paperwork you need with the quote.
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.
Aftercare for building managers
Cleaning and maintenance staff play a part too. Pass these on to them:
- Avoid piecemeal callouts where you can
- Include mastic in your cyclical inspections
- Start inspections with the most exposed faces
- Log resealing dates block by block
Include sealant in planned building inspections. Watch for splits, open gaps, hard or chalky surfaces and mastic pulling away, and note the building and elevation.
Budgets are easier to plan when sealant is part of planned maintenance. We can quote buildings in priority order and work down the list.
FAQs: Longlands
Do you work in London buildings with loading restrictions?
Yes, most London buildings have access rules of some kind, and we plan around them. Share the building’s contractor rules and we will work to them. The ULEZ covers the whole of Greater London, which we allow for
Will you work in a care home in Longlands without moving residents out?
Yes. We agree rooms and times with the manager and work a few areas at a time. Tell us about any infection-control or safeguarding requirements and we’ll work to them.
When can the area be used after sealing?
We’ll confirm how long the chosen product needs to cure, and sign any area that should be left alone.
Do you work with property factors and landlords?
Yes. Most of our mastic sealing is for agents, factors, housing associations and portfolio landlords and work can be quoted per building or as a whole.
How long will the new sealant last?
There isn’t a single answer, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular checks let you plan resealing before leaks or damage.
Can you plan resealing across several buildings?
Yes. Each building is inspected, quoted and scheduled in turn, and the programme can start with the worst.
Who decides which product is used?
Where there’s a specification, we use the product it names. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
Honest limits
We check first that sealant really is the fix. It won’t put right:
- Leaks from above rather than through a joint
- Masonry that has broken away beside the joint
- Leaks through the frame itself rather than the perimeter
If you’re not sure, just phone 01277 525 020 or email a schedule or drawings and we’ll give you a straight answer before you book.
Joints and surfaces we work on
- Communal entrances and stairwells
- Balcony and threshold joints
- External wall and movement joints
- Communal kitchens and washrooms
- Window and door perimeters on blocks
- Shopfronts below residential blocks
What sets the cost
Each job is priced on its own details. The things that drive the figure:
- Whether the work must be split into stages
- Any access equipment needed
- Joint width, depth and condition
- Site requirements such as inductions and permits
No two sites price the same: joint size, product, access and site hours all play a part. A fixed quote follows once we understand the job.
What to include in your enquiry
A good diagnosis starts with the right details. Tell us:
- Access details, including height
- The site address and postcode
- Your programme or deadline
- Photos of the joints, close up and from further back
Specifications, drawings and tender packages are welcome with any enquiry, and we will price against exactly what is specified. For smaller jobs, photos and a description will do.
Also near Longlands
What else we do in Longlands
Work for main contractors and building owners
Building owners and managing agents use us on sealant work across single buildings or whole portfolios. One quote can cover more than one site, which keeps the paperwork simple.
FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we will confirm them with the quote.