Mastic Sealing in Lewisham
Mastic sealing in Lewisham, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.
- Estate-wide sealant that is simply worn out
- Window mastic that has split and shrunk
- Damaged joints in communal entrances and corridors
Mastic sealing near Lewisham
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Mastic sealing for commercial buildings in Lewisham
For blocks and buildings in Lewisham and across Greater London, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. Addresses, photos of typical joints and a rough idea of quantities let us give a quick quote or we can visit. Site teams most often ask us about window mastic that has split and shrunk and the same joint failures repeated across a portfolio, across balcony and threshold joints, communal kitchens and washrooms and shopfronts below residential blocks. A specialist sealant contractor works differently from a general builder: on jobs in Lewisham, preparation and product choice get the time they need.
For managing agents in Lewisham, resident access, notice periods and the building’s rules shape the job. We work to the agent’s notice and access plan, so residents know what’s happening.
Every job we finish is backed by a 12-month workmanship guarantee, in Lewisham as everywhere else we work. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Place
- Lewisham (SE13, SE8, SE6)
- Wider area
- Greater London
- Guarantee
- A 12-month guarantee
- Price
- Quoted before any work starts
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Doing it in-house
A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.
Different surfaces, different methods
Tenement and older buildings
Older mastic can contain asbestos and the register is checked before anything is disturbed. If it’s suspected, work stops until it’s tested.
Commercial and mixed-use buildings
Landlords with commercial portfolios have shopfronts, office entrances and external joints to look after. A planned programme suits multi-building portfolios.
Also near Lewisham
What else we do in Lewisham
Why act early in Lewisham
Reacting to every complaint means sending someone out block by block. Planned resealing covers a whole building or estate in one go and is simpler to manage and budget. Access in London is hard enough to arrange once, so while access is arranged it pays to renew all failing joints, not just the worst.
Pricing mastic joints depends on quantities, condition and access. Call for a quote.
Why choose Mastic Doctor in Lewisham
- Failed material removed, not covered up
- 12-month guarantee on workmanship
- Specification-led, product-correct work
- Our applicators hold CSCS cards
Take a look at what affects the cost and how we’re accredited.
Our process
We begin with a short walk round with whoever looks after the building, to confirm the scope, the order of work and any areas we must keep clear. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. For a job in Lewisham, access comes first. Send the building rules and access times with your enquiry.
- A building-by-building inspection lists the failed joints.
- 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.
Preparing the site
- Move anything stored against the joints
- Arrange parking or a loading space
- Warn occupants and staff about the work
Ask for a quote
A handful of photographs and a postcode is the fastest way to a quote. Upload them with the quote form, or call the office on 01277 525 020 or send details through our quote form if you’d rather talk the job through.
Advice
When to call us in Lewisham
The edges of the material itself sometimes break away for instance where render or brick edges crumble. We’ll tell you if the joint edges need repairing before resealing.
Things that normally lead to an enquiry:
- No planned programme for sealant
- Damaged joints in communal entrances and corridors
- Window mastic that has split and shrunk
- A mix of products and colours from past repairs
Student accommodation around universities such as University of Greenwich - Greenwich Campus (1.4 miles north of Lewisham) is usually managed block by block, which suits a planned mastic programme.
Questions to ask before you book
- Will RAMS and insurance details be available?
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
- How long is the guarantee, and what does it include?
- The named product and why it was chosen
Questions we’re asked in Lewisham
Can work in a care setting near Lewisham go ahead while residents are there?
Yes, with the manager deciding the order and timing of rooms. Any site rules, from signing in to infection control, are agreed before we start.
Can you work at a site such as Chiltonian Industrial Estate, by Lewisham?
Yes. Estates, retail parks and business parks around Lewisham, Chiltonian Industrial Estate among them, are all within reach. Photos and a short description are enough for a first look.
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.
Can you quote from photos?
That depends on the size and complexity of the job. Simple work can often be priced from photos, while larger or less clear jobs get a site visit first.
What if the old mastic contains asbestos?
Some mastics in pre-2000 buildings contain asbestos. We ask for the asbestos register or survey before work starts, and if it’s suspected, work stops until it’s tested.
Can you follow the specification on our project?
Yes. Include it with the drawings when you ask for a quote, and we will price the work to it, flagging anything that needs clarifying.
How do we ask for a quote?
The quote form is the simplest route, though you can also give us a call on 01277 525 020 or use the quote form. Include photographs or drawings if you have them.
Mastic sealing in Lewisham: the local picture
Five care or nursing homes sit less than 2 miles from Lewisham. Care home owners need frame and external mastic kept sound without unsettling residents. Blocks in London are typically run by managing agents, landlords or housing associations, with residents to notify and access to arrange. We work to your notice and access plan.
If you look after a block within reach of Lewisham station (less than half a mile north-west of Lewisham), frame and balcony mastic can be renewed on one programme. Older community buildings, St Stephen's Church among them, often have frames of mixed ages whose mastic varies.
Lewisham is about 3 miles west of Eltham, in Greater London. Businesses, contractors and managing agents in Lewisham can call on us for mastic joints. We work across 764 places in Greater London, from busy centres to rural villages.
If you need mastic sealing in SE13, SE8 and SE6, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. Buildings on Station Road, Lewisham High Street and Lewis Grove are within our area. With the B220 nearby, Lewisham is straightforward for us to reach. Just outside Lewisham, we also work in Ladywell (1 mile south-west), St Johns (1 mile north-west), Hither Green (1 mile south-east), Blackheath (1 mile north-east) and Lee (1 mile south-east). Nearby towns on our patch include London (4 miles north-west), City of Westminster (7 miles north-west), Marylebone (7 miles north-west), Kensington (9 miles west), St Pancras (6 miles north-west) and Shoreditch (5 miles north-west).
What’s near Lewisham
Recent enquiries here include premises near St Joseph's Academy, Ladywell Fields and The Watch House. There’s a railway station in Lewisham itself: Lewisham station. Well-known places in the area include Greenwich Castle (1.2 miles north) and Fan Museum (1.2 miles north). Green spaces nearby include Knight's Hill and Brookmill Road Local Nature Reserve.
For managing agents and facilities managers
When you manage a building on behalf of an owner, you need clear quotes and clear reporting. You get a fixed quote, an agreed scope and a walk round at the end, plus a 12-month guarantee.
Whether you are a managing agent, a property factor or an owner’s representative: send details, get a fixed quote, we seal, guaranteed. We can agree access arrangements and keyholder contacts beforehand.