Mastic Sealing in St Ann's
We carry out mastic sealing for building owners, managing agents and housing associations in St Ann's. Send details for a fixed quote.
- Damp patches beside frames
- Draughts at frames across a block
- Open joints in brickwork or panels
Mastic sealing for St Ann's sites
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Your questions answered
Will you take on a block within reach of Seven Sisters station?
Yes, and several blocks can go on one quote. Photos of each elevation help us quote accurately.
Can you work in a care home near St Ann's with residents in?
Yes. We work around residents’ routines, a room or two at a time. Noise and disruption are kept to a minimum.
Can you send RAMS and CSCS details before starting?
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.
Will you just go over the old sealant?
No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.
How do you choose the sealant?
The specification comes first, if there is one. If there isn’t one, it comes down to the joint: its movement, its surfaces and what it has to cope with.
Is asbestos a concern with old mastic?
In older buildings, old mastic can contain asbestos. We check the asbestos register or survey before disturbing it and suspect material is tested first.
What about access for upper-floor joints?
Every block is different. How upper joints are reached is agreed before work is booked so there are no surprises.
About our mastic sealing in St Ann's
In buildings from before 2000, some old mastics contain asbestos. Before we disturb it, we ask to see the asbestos register or survey and if it’s suspected, work stops until it’s tested. Removing asbestos-containing material isn’t something we do. If you’re dealing with a mix of products and colours from past repairs and repeated reactive repairs to the same buildings, we can help, whatever the surface. Most enquiries from St Ann's start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Across Greater London, St Ann's included, the ULEZ applies, and parking and loading rules differ from street to street. For a block or estate, it helps to know where we can park and stage materials.
Work we carry out comes with a 12-month guarantee. Should something we installed fail, give us a call on 01277 525 020 or email the details over and we’ll come back to it.
- Place
- St Ann's (N15, N4, N16)
- Wider area
- Greater London
- Guarantee
- A 12-month guarantee
- Quotes
- A fixed quote before we start
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Our process
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. Most London premises stay occupied while we are on site, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.
- A building-by-building inspection lists the failed joints.
- You get a fixed quote, per block or for the whole programme.
- Dates and areas are agreed so occupiers can be told.
- Old mastic is removed and the joint faces prepared.
- Joints are resealed and tooled.
- Each building is checked and signed off with the 12-month guarantee.
What we need from you
- Tell us what induction or permit system the site runs
- Make sure the joints can be reached
- Point out parking and an unloading spot
Quotes
If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price against exactly what is specified. Smaller jobs need nothing more than photographs and a few notes.
Read more
General trades versus a specialist
Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
Using site staff can make sense for a small touch-up, but anything bigger is another matter: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
Building owners, agents and FMs in St Ann's
Main contractors use us as their sealant subcontractor. Programme, specification and site rules come first, and our applicators hold CSCS cards.
We take on planned maintenance as well as one-off repairs: working through a building or an estate in stages that fit your budget. Sites in St Ann's can sit alongside others in a wider programme across Greater London.
When to call us in St Ann's
The edges of the material itself sometimes break away, such as crumbling render, brick arrises or frame edges. If the edges are unsound, we say so before quoting the sealing.
What tends to prompt an enquiry:
- Cracked, hardened mastic round windows on a block
- Damaged joints in communal entrances and corridors
- Water getting in round frames after rain
- Open joints in brickwork or panels
If you own or manage units on a site such as Crusader Industrial Park, under half a mile south-west of St Ann's, failed mastic on frames, door surrounds and external joints can be dealt with unit by unit.
Comparing quotes
- Their pre-qualification and accreditations
- Who will actually carry out the work
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
- What the guarantee covers, and for how long
When it isn’t the sealant
Sealant solves a lot, but not everything, and we’d rather tell you before you spend money. These need a different solution:
- Leaks through the frame itself rather than the perimeter
- Leaks from above rather than through a joint
- Misted or failed double-glazed units
Not sure which it is? You can call the office on 01277 525 020 or send photos by email and we will tell you honestly.
Surfaces we seal
- Window and door perimeters on blocks
- Balcony and threshold joints
- Communal kitchens and washrooms
- Communal entrances and stairwells
- External wall and movement joints
- Shopfronts below residential blocks
What the job involves on each surface
Communal areas
Communal areas stay in use while we work. We work in sections so access is never blocked.
External movement joints
Brickwork, blockwork and panel joints let a building move. Failed sealant in a movement joint lets water in.
Mastic sealing in St Ann's: the local picture
There are four care or nursing homes within about 2 miles of St Ann's. 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. We work to your notice and access plan.
Churches, halls and community buildings such as St Ann's Church are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time. Student accommodation around universities such as American University in London (1.9 miles south-west of St Ann's) is typically managed block by block, which suits a planned mastic programme.
St Ann's is about 2 miles north-west of West Hackney, in Greater London. If you’re looking for mastic sealing in St Ann's, we can help. St Ann's is one of 764 places in Greater London on our list. Our London page has more on work in that area.
Business premises anywhere in N15, N4 and N16 are within our area for mastic joints. We cover commercial and managed buildings on Ida Road, Elmar Road and Grove Road and the roads nearby. Sites close to St Ann's are covered too, including West Green (1 mile north-west), Seven Sisters (1 mile east), South Tottenham (1 mile east), Harringay (1 mile west) and Tottenham Green (1 mile north-east). Further afield, our area takes in London (6 miles south), City of Westminster (5 miles south-west), Marylebone (5 miles south-west), Kensington (8 miles south-west), St Pancras (4 miles south) and Shoreditch (4 miles south).
Local landmarks in St Ann's
Around St Ann's, our work takes us to commercial buildings near Church of St Andrew, No.8 Seven Sisters pub and Moselle Upper School and the streets around them. Also close by are Chestnuts Park (less than half a mile west) and Park View School (0.5 miles north-west). There’s a railway station in St Ann's itself: Seven Sisters station. A little further out are City of London Maternity Hospital (1.7 miles south-west) and The Mall Wood Green (1.4 miles north-west). Not far away are Railway Fields and Hollow Pond.