Mastic Sealing in North Woolwich
Planning work on a mastic joint in North Woolwich? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Damp patches beside frames
- Complaints coming in block by block
- Occupiers reporting cold air round windows
Mastic sealing near North Woolwich
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
For managing agents and facilities managers
CHAS accredited and a Constructionline member, we are straightforward to vet for your supplier list. We are fully insured, and our insurance certificate can go with the quote.
When you manage a building on behalf of an owner, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative.
How we handle mastic sealing in North Woolwich
Before work starts, most agents and landlords want the documents in order. For documents, tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote. We’re a Constructionline member and CHAS accredited, and we carry public liability insurance. If you are dealing with water getting in round frames after rain and no planned programme for sealant, we can put it right, on window and door perimeters on blocks, balcony and threshold joints and shopfronts below residential blocks alike. A specialist sealant contractor works differently from a general builder: in North Woolwich, that means joint design, primers and backing rod as standard.
London has a large stock of purpose-built blocks, mansion flats and converted buildings managed by agents and housing associations. Window and door perimeters, balcony joints and communal areas all have mastic that ages together across a building.
Whoever the client is, the cover is the same: a 12-month guarantee on our workmanship. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.
- Place
- North Woolwich (SE18, E16, E6)
- Region
- Greater London
- Guarantee
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
Planned mastic for North Woolwich portfolios
There are four care or nursing homes within about 2 miles of North Woolwich. For owners and operators of care buildings, window perimeters and external joints are best renewed in planned phases around residents. In London, mastic work on a block goes through the managing agent or landlord, with notice to residents. Our programme follows the access you agree with residents.
Landlords with units on estates such as Standard Industrial Estate, less than half a mile to the south-west of North Woolwich, can bring frame, door and external mastic across several units into one programme. Blocks of flats and mixed-use buildings often cluster around stations such as Woolwich Dockyard station, 0.7 miles south of North Woolwich, and their window and balcony mastic tends to age at the same rate across a building.
North Woolwich is about 1 mile north of Woolwich, in Greater London. Across the SE18 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 North Woolwich. London is covered too, around 7 miles from North Woolwich.
If you need mastic sealing in SE18, E16 and E6, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. Among the streets we cover are Drew Road, Tate Road and Pier Road, and sites on any of them can send details for a fixed quote. Close to North Woolwich, our area also takes in Cyprus (1 mile north), Royal Docks (1 mile north-west), Beckton (1 mile north-east), Silvertown (1 mile west) and Custom House (1 mile west). Nearby towns on our patch include London (7 miles west), City of Westminster (9 miles west), Marylebone (9 miles west), Kensington (11 miles west), St Pancras (8 miles west) and Shoreditch (6 miles west).
Landmarks near North Woolwich
Locally, jobs take us to sites close to Beckton District Park, Drew Primary School and The Mitre pub, among other places. The closest station to North Woolwich is Woolwich Dockyard station, about 0.7 miles south of the centre. Well-known places in the area include British Hospital for Mothers and Babies (0.8 miles south-west) and Gallions Reach Shopping Park (1.1 miles north-east). Not far away are Gilbert's Pit.
Our process
We bring the products specified for the job, along with primers and backing rod. Any old material is cut back to clean, sound faces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly. All of Greater London is in the ULEZ, and kerbside space in North Woolwich can be scarce. 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.
- Dates and areas are agreed so occupiers can be told.
- Old mastic is removed and the joint faces prepared.
- Joints are resealed and tooled.
- We check the finished work and confirm the guarantee.
Preparing the site
- Confirm the product named in the specification
- Explain the parking and delivery arrangements
- Tell us your opening times and when work is allowed
Request a quote
Send us photos, drawings or a joint schedule and a fixed quote comes back to you. Where a site visit makes more sense, we will arrange one.
Related advice
Towns and villages near North Woolwich
Other services in North Woolwich
When it isn’t the sealant
Before quoting, we check that sealant is the right answer. It isn’t the answer for:
- Glazing that needs replacing
- Leaks through the frame itself rather than the perimeter
- Leaks from above rather than through a joint
If in doubt, call 01277 525 020 or use the quote form and we’ll say what we think before you book.
What we seal
- Window and door perimeters on blocks
- Shopfronts below residential blocks
- Balcony and threshold joints
- Communal entrances and stairwells
- External wall and movement joints
- Communal kitchens and washrooms
Common problems we fix in North Woolwich
Previous repairs often sealed new mastic over old. New sealant won’t grip failed sealant, so these repairs rarely last.
Common reasons buildings call us in:
- The same joint failures repeated across a portfolio
- Leaks at window and door perimeters
- Worn sealant at communal door frames
- Repeated reactive repairs to the same buildings
Schools and community buildings such as Oasis Academy Silvertown need frame and external mastic kept sound like any building.
Questions to ask before you book
- Do they follow the manufacturer’s priming guidance?
- Are they CHAS accredited or on Constructionline?
- How long is the guarantee, and what does it include?
- Their public liability cover
What happens if it’s left?
Dealing with failed joints one report at a time is slow and scattered. Planned resealing covers a whole building or estate in one go, under a single quote and a single programme. Failed sealant in a building in North Woolwich can quickly affect neighbours, tenants or the floor below: water travels through shared structures, and a small leak becomes a dispute between occupiers. Putting it right early is less disruptive than dealing with the consequences.
Every site prices differently: joint size, product, access and site hours all play a part. A fixed quote follows once we understand the job.
Why choose Mastic Doctor in North Woolwich
- Constructionline member
- CSCS-carded applicators
- Fully insured, including public liability cover
- Standard and matched colours in many product ranges
Read what affects the cost and our accreditations.
Common questions from North Woolwich clients
Can you cope with the access rules in a London building?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. Share the building’s contractor rules and we will work to them. We allow for the ULEZ, which covers every borough
Can you quote for a block close to Woolwich Dockyard station?
Yes, we work for agents, landlords and housing associations with blocks of every size. Send the address, photographs of the elevations and your access arrangements, and we’ll give a fixed quote.
Do you check for asbestos in old sealant?
Asbestos removal isn’t part of our work. If old sealant is suspected, work stops until it’s tested in line with the dutyholder’s asbestos management.
How long does a typical visit take?
The duration is planned around your programme and the access we are given. We will give you an estimate of time on site when we quote.
Can you take on resealing for a block portfolio?
We do. Managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios are our main clients for this work, and we quote building by building or as a programme.
Can you seal joints high up on a block?
Access is discussed and agreed before the quote is fixed. Tell us the building height and any access already in place, and we will tell you how we’d approach it.
Do you seal on top of existing sealant?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, since fresh sealant will not bond reliably to aged material.
Quoting for work in North Woolwich
What shapes the price:
- Working within restricted access windows
- Whether old sealant has to be cut out first
- Specialist products, such as fire-rated or hygienic sealants
- The site’s rules and procedures
A quote for mastic joints depends on quantities, condition and access, and any specification that applies. Call for a quote.
What we need to price the job
Diagnosis starts before we arrive. Tell us:
- The type of building and who uses it
- Rough lengths or quantities, or drawings if you have them
- Clear photographs of the problem areas
- Access details, including height
Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. The easiest way is to ring 01277 525 020 or send details through our quote form.