Mastic sealing for building owners and managing agents in Fortis Green, Greater London
Sealant work in Fortis Green for main contractors, managing agents and facilities managers: mastic sealing for building owners, managing agents and housing associations, with a fixed quote first.
- Damp patches beside frames
- Open joints in brickwork or panels
- A mix of products and colours from past repairs
Mastic sealing for Fortis Green sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
About our mastic sealing in Fortis Green
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 Fortis Green carry our 12-month guarantee. If you’re dealing with communal area joints that look neglected and brittle perimeter mastic across a building, we can put it right. Whoever orders the work in Fortis Green, the brief is typically the same: a clear scope, tidy work and joints that don’t fail again.
For managing agents in Fortis Green, 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.
Every job is signed off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.
- Location
- Fortis Green (N10, N2, N6)
- Region
- Greater London
- Guarantee
- A 12-month guarantee
- Price
- Quoted before any work starts
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
How a job runs
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. For a job in Fortis Green, access comes first. Send the building rules and access times with your enquiry.
- Each block or building is walked and the failed joints recorded with the likely cause.
- We send a fixed quote that sets out the joints, the products and the programme.
- The programme is fixed with you, including dates you can pass on to residents or tenants.
- Failed mastic is removed and the faces taken back to sound, dry material.
- Backing rod and primer go in where the joint and the product need them, then new sealant is applied and tooled.
- Completed joints are inspected and carry a 12-month workmanship guarantee.
Before we start on site
- Send any specification or drawings in advance
- Send asbestos survey details if the building is pre-2000
- Tell staff and tenants when we will be in
Getting a fixed quote
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, speak to us on 01277 525 020 or send photos by email.
Advice
Also near Fortis Green
What else we do in Fortis Green
What sets the cost
The price varies from site to site. Expect it to depend on:
- Distance, for remote addresses
- Any access equipment needed
- Whether the work must be split into stages
- The site’s rules and procedures
Small jobs and large programmes are priced from the same things: scope, access, product and programme. Call for a quote and we’ll put a fixed figure on it.
Sending details for a quote
Diagnosis starts before we arrive. Let us know:
- Whether the building will be occupied during the work
- Photos of the joints, close up and from further back
- The asbestos register, for older buildings
- When you need the work done
Need a figure for a tender or a budget? Send the scope and any drawings, and we’ll return a fixed quote that you can work with. If you have questions first, give us a call on 01277 525 020 or email us.
Common questions from Fortis Green clients
Do you work in occupied care homes around Fortis Green?
Yes, with the manager deciding the order and timing of rooms. Noise and disruption are kept to a minimum.
Do you work for managing agents with blocks near Alexandra Palace station?
Yes. Managing agents, landlords, property factors and housing associations are who this service is for. Give us the building’s details and say how residents are notified, and we’ll quote and plan to suit.
How many days will you need on site?
We plan the time on site around your programme and access. We’ll give you an estimate of time on site when we quote.
What guarantee do you give on resealing?
A 12-month guarantee covers our work. It covers our workmanship, not later building movement, damage or frame failures.
Can you reseal a whole block or estate?
We can. We survey and price each building, then work through them in order, and the programme can start with the worst.
Can you seal joints high up on a block?
We talk through access for each building when we quote. Tell us the building height and any access already in place, and we’ll tell you how we’d approach it.
Is it fine to apply new sealant on top of old?
No. We cut the old material out and clean the joint back before sealing, since fresh sealant will not bond reliably to aged material.
Owners, agents and contractors
Agents, factors and owners’ representatives all follow the same route: send details, get a fixed quote, we seal, guaranteed. We can agree access arrangements and keyholder contacts beforehand.
We take on planned maintenance as well as one-off repairs: working through a building or an estate in stages that fit your budget. Fortis Green can form part of a wider programme across Greater London.
Signs you need mastic sealing in Fortis Green
Topping up old mastic is a common shortcut. New silicone has nothing to grip on old silicone, so these repairs rarely last.
What tends to prompt an enquiry:
- Window mastic that has split and shrunk
- Movement joints with sealant missing
- Draughts at frames across a block
- Estate-wide sealant that is simply worn out
If you own or manage units on a site such as Friern Bridge Retail Park, 1.4 miles north of Fortis Green, failed mastic on frames, door surrounds and external joints can be dealt with unit by unit.
Questions to ask before you book
- What level of public liability insurance do they hold?
- The terms of the workmanship guarantee
- Their pre-qualification and accreditations
- Will CSCS-carded applicators be on site?
Looking after the joints
Sealant joints are maintenance items, and how long they last depends on how they’re treated. We suggest:
- Prioritise elevations facing the weather
- Mention RAMS, insurance or CSCS requirements up front
- Keep bins and bikes away from communal door frames
- Avoid piecemeal callouts where you can
Encourage occupiers to report water or draughts at frames. A quick report keeps a small repair small.
The longer failed joints are left, the more likely the substrate edges break up. Once that happens, repairs come before resealing.
Frames, entrances and external joints in Fortis Green
There are six care or nursing homes within about 2 miles of Fortis Green. 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. Our programme follows the access you agree with residents.
Schools and community buildings such as Fortismere School need frame and external mastic kept sound like any building. Trustees of buildings like United Reformed Church can bring frame and external mastic into a planned maintenance list.
Fortis Green is about 1 mile south-east of Finchley, in Greater London. Businesses, contractors and managing agents in Fortis Green use us for work on mastic joints. Fortis Green is one of 764 places in Greater London on our list. London is covered too, around 7 miles from Fortis Green.
We cover the N10, N2 and N6 postcode districts. If your site is on Hill Road, Durham Road and Steeds Road or close by, we can quote for mastic joints. Being close to the A504, Fortis Green is easy to get to with materials and equipment. We also cover Muswell Hill (1 mile east), East Finchley (1 mile west), Highgate (1 mile south), Crouch End (1 mile south-east) and Hampstead Garden Suburb (2 miles south-west). Bigger towns within reach include London (7 miles south), City of Westminster (5 miles south), Marylebone (5 miles south), Kensington (7 miles south), St Pancras (5 miles south) and Shoreditch (6 miles south-east).
Local landmarks in Fortis Green
In Fortis Green, that means premises near Tollington School, Cherry Tree Wood and The Clissold Arms. Fortis Green’s nearest station is Alexandra Palace station, roughly 1.4 miles east of the centre. Well-known places in the area include Kenwood House (1.6 miles south-west) and Grand Arcade (1.8 miles north-west). Open spaces near Fortis Green include Highgate Hill and Glebelands Local Nature Reserve.
When it isn’t the sealant
Before quoting, we check that sealant is the right answer. It won’t put right:
- Misted or failed double-glazed units
- Materials that need asbestos testing before work
- Leaks through the frame itself rather than the perimeter
Not sure which it is? You can phone 01277 525 020 or email us and we will tell you honestly before you book.
Where we work in Fortis Green
- Communal entrances and stairwells
- Communal kitchens and washrooms
- Window and door perimeters on blocks
- Shopfronts below residential blocks
- Balcony and threshold joints
- External wall and movement joints