Seven Sisters mastic sealing
Sealant work in Seven Sisters for main contractors, managing agents and facilities managers: mastic sealing for building owners, managing agents and housing associations, with a fixed quote first.
- Estate-wide sealant that is simply worn out
- Window mastic that has split and shrunk
- A mix of products and colours from past repairs
Mastic sealing for businesses in Seven Sisters
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
How we handle mastic sealing in Seven Sisters
We diagnose before we prescribe: which joints have failed, why, and whether sealant is the right answer. Old mastic is removed entirely, the faces prepared, primer used where the maker specifies it and new sealant tooled in and backing rod used wherever a joint is deep. We work on external wall and movement joints, communal kitchens and washrooms and communal entrances and stairwells, and the failures we are asked to look at most are the same joint failures repeated across a portfolio and patchy repairs in mismatched sealant. Facilities teams, main contractors and managing agents in Seven Sisters tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.
Planning mastic work on a London block means notices to residents, access to flats and agreed working areas. Work is planned with the agent so residents get notice and access is arranged in advance.
We sign every job off with a 12-month guarantee. The promise is simple: if the work we did fails within twelve months, we return to fix it.
- Place
- Seven Sisters (N15, N17, N16)
- Region
- Greater London
- Guarantee
- 12 months on every job
- Price
- Quoted before any work starts
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
When it isn’t the sealant
We check first that sealant really is the fix. It isn’t the answer for:
- Broken glass or failed sealed units
- Failed window or door frames, which need a window contractor
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
If you’re not sure, just ring 01277 525 020 or email drawings and photos and we will give you a straight answer.
Joints and surfaces we work on
- Balcony and threshold joints
- Communal entrances and stairwells
- Window and door perimeters on blocks
- Communal kitchens and washrooms
- Shopfronts below residential blocks
- External wall and movement joints
What the job involves on each surface
Planned maintenance
We can work into your cyclical maintenance plan on a timetable you set.
Tenement and older buildings
Stone needs a neutral-cure product and we choose accordingly.
How a job runs
We follow your site rules from the start: signing in, inductions and any permit to work. Once we are cleared to begin, we take the joints in the sequence agreed with you. For a job in Seven Sisters, access comes first: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Give us the hours we can be on site and we’ll schedule to suit.
- First comes a look at the joints and, for older buildings, the asbestos records.
- The products and programme are set out in a fixed quote.
- Failed mastic is removed completely.
- The joints are prepared and resealed with the right product.
- We finish each building before moving to the next.
What we need from you
- Arrange parking or a loading space
- Let us know about inductions and permits
- Tell staff and tenants when we’ll be in
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.
Advice
Quoting for work in Seven Sisters
To price the job, we consider:
- The site’s rules and procedures
- Which sealant the job calls for
- Phasing around occupants
- Whether old sealant has to be cut out first
The work involved drives the cost: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote and we’ll explain how it’s made up.
Details that help us quote
To price the job accurately, we need a clear picture of the site. Useful things to include:
- Clear photographs of the problem areas
- Asbestos survey details if the building is older
- Approximate linear metres or a joint schedule
- Access details, including height
Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To ask for one, call 01277 525 020 or email drawings and photos.
Mastic sealing in Seven Sisters: the local picture
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. Three care or nursing homes sit less than 2 miles from Seven Sisters. Care home owners need frame and external mastic kept sound without unsettling residents.
If you own or manage units on a site such as Tottenham Hale Retail Park, 0.6 miles to the north-east of Seven Sisters, failed mastic on frames, door surrounds and external joints can be dealt with unit by unit. For agents with blocks near Seven Sisters station, under half a mile west of Seven Sisters, a block-wide mastic programme deals with frames, balconies and entrances in one go. Site managers at schools like Earlsmead Primary School can fit frame mastic into the summer works.
Seven Sisters is about 2 miles west of Walthamstow, in Greater London. Looking for mastic sealing in Seven Sisters? We can help, as we do across Greater London. 764 places across Greater London fall within our area, Seven Sisters among them. Our London page has more on work in that area, about 6 miles away.
Postcode districts covered here: N15, N17 and N16. We cover commercial and managed buildings on Ida Road, Elmar Road and Grove Road and the roads nearby. If your building is just outside Seven Sisters, we cover South Tottenham (1 mile north), Tottenham Green (1 mile north), St Ann's (1 mile west), Tottenham Hale (1 mile north-east) and West Green (1 mile west). Nearby towns on our patch include London (6 miles south), City of Westminster (6 miles south-west), Marylebone (5 miles south-west), Kensington (8 miles south-west), St Pancras (4 miles south-west) and Shoreditch (4 miles south).
Local landmarks in Seven Sisters
Around Seven Sisters, our work takes us to commercial buildings near No.8 Seven Sisters pub, Ada College and Chestnuts Park and the streets around them. You will also find Gladesmore Community School (under half a mile east) and Church of St Andrew (0.8 miles south). There’s a railway station in Seven Sisters itself: Seven Sisters station. Well-known places in the area include Montfichet's Tower (4.9 miles south) and The Mall Wood Green (1.7 miles north-west). Green spaces nearby include Highgate Hill and Woodberry Wetlands.
Why act early in Seven Sisters
Mixed repairs by different contractors leave a patchwork of products and colours. Resealing a whole building gives a consistent finish. Getting scaffold, permits or access booked in Seven Sisters takes effort, so it makes sense to deal with every failing joint while access is in place.
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 us?
- Products installed to the manufacturer’s instructions
- Sealing commercial buildings since 2005
- Health and safety: CHAS accredited
- 12-month guarantee on workmanship
Take a look at our cost guide or our accreditations.
Site staff or a sealant specialist?
General builders and handymen seal joints, but it isn’t their main trade. 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.
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
FAQs: Seven Sisters
Can you work in a care home near Seven Sisters with residents in?
Yes. Care settings are planned area by area, at times agreed with the home. Noise and disruption are kept to a minimum.
Does your area include sites such as Tottenham Hale Retail Park, near Seven Sisters?
Yes, sites like Tottenham Hale Retail Park are within our area, along with the rest of Seven Sisters. To start, just ring 01277 525 020 or email drawings and photos with the unit, the joints involved and your access times.
Is asbestos a concern with old mastic?
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.
Do you seal on top of existing sealant?
No, never. Overlaying old sealant is a frequent cause of early failure, so it all comes out first.
Do you work to architects’ specifications?
Yes. Send it with your enquiry, and we will price the work to it.
How do I request a quote?
The quote form is the simplest route, though you can also call 01277 525 020 or email the details over. Include photos or drawings if you have them.
Do you need to see the site first?
That depends on the size and complexity of the job. Simple work can often be priced from photographs, and bigger or more complex jobs typically get a visit.