Mastic Sealing in Finchley
Mastic sealing for building owners, managing agents and housing associations across Finchley, by CSCS-carded applicators. Fully insured and CHAS accredited.
- Repeated reactive repairs to the same buildings
- Damaged joints in communal entrances and corridors
- Movement joints with sealant missing
Mastic sealing for businesses in Finchley
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
About our mastic sealing in Finchley
We work for building owners, landlords with commercial or block portfolios, managing agents and housing associations. Many prefer a planned programme to one-off visits, with each block quoted and scheduled in turn. Site teams most often ask us about mastic failing across several blocks on an estate and damp patches beside frames, on shopfronts below residential blocks, window and door perimeters on blocks and external wall and movement joints. One point of contact handles commercial sealant work in Finchley from the first photographs to the final walk-round, whether it’s one building or several.
For managing agents in Finchley, 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.
The 12-month guarantee is for workmanship rather than wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we spell out the cover before we begin.
- Location
- Finchley (N3, N2, N12, NW11)
- Region
- Greater London
- Cover
- A 12-month guarantee
- Price
- Quoted before any work starts
- Phone
- 01277 525 020
- Page updated
- 3 November 2026
Block-wide mastic in Finchley
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. The 2 miles around Finchley include nine care or nursing homes. For owners and operators of care buildings, window perimeters and external joints are best renewed in planned phases around residents.
For agents with blocks near New Southgate station, 1.9 miles north-east of Finchley, a block-wide mastic programme deals with frames, balconies and entrances in one go. If you own or manage units on a site such as Finchley Industrial Centre (1.3 miles north of Finchley), failed mastic on frames, door surrounds and external joints can be dealt with unit by unit. For a school such as Manorside Primary School, perimeter mastic on windows and doors is a holiday job.
Finchley is about 6 miles north of City of Westminster, in Greater London. Any commercial site in Finchley is covered, for single jobs and planned programmes alike. We work across 764 places in Greater London, from busy centres to rural villages. We also cover London, around 8 miles from Finchley.
If you need mastic sealing in N3, N2, N12 and NW11, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. Buildings on Station Road, Chaplin Square and Market Place are within our area. Being close to the B1462, Finchley is easy to get to with materials and equipment. Nearby places we also cover include Church End (1 mile west), Woodside Park (1 mile north), North Finchley (1 mile north), Friern Barnet (2 miles north-east) and Oakleigh Park (2 miles north). Bigger towns within reach include London (8 miles south-east), City of Westminster (6 miles south), Marylebone (6 miles south), Kensington (7 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles south-east).
What’s near Finchley
Around Finchley, our work takes us to commercial buildings near The Elephant Inn, Bishop Douglass School and Francis Skaryna Belarusian Library and Museum, among other places. Other local landmarks include Victoria Park (less than half a mile north) and Woodhouse College (1 mile north-east). The nearest railway station is New Southgate station, about 1.9 miles north-east. Other landmarks nearby include Finchley Memorial Hospital (less than half a mile north-east) and Grand Arcade (1 mile north). The countryside around Finchley includes Highgate Hill and Lakeside Nature Reserve.
Surface by surface
Communal areas
Joints at low level in communal areas take knocks from bins, bikes and buggies and tend to fail first.
Window and door perimeters on blocks
We typically work through a block’s windows in a planned order. How each joint is reached is agreed at quote stage.
Common questions from Finchley clients
Can work in a care setting near Finchley go ahead while residents are there?
Yes. We agree rooms and times with the manager and work a few areas at a time. We follow the home’s own procedures throughout.
Do you work in London buildings with loading restrictions?
Yes, most London buildings have access rules of some kind, and we plan around them. Share the building’s contractor rules and we’ll work to them.
Can you send RAMS and CSCS details before starting?
Our credentials include CHAS, Constructionline and public liability insurance. For specific documents, tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote.
Do you guarantee the mastic work?
Every building we reseal has a 12-month guarantee. It applies to our workmanship rather than damage or problems with the frames.
Do you work to architects’ specifications?
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.
Do you check for asbestos in old sealant?
In older buildings, old mastic can contain asbestos. We ask for the asbestos register or survey before work starts and suspect material is tested first.
Do you work for managing agents and housing associations?
We do. Most of our mastic sealing is for agents, factors, housing associations and portfolio landlords, and we quote building by building or as a programme.
From enquiry to sign-off
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. Planning a London job such as one in Finchley starts with access. Give us the hours we can be on site and we will schedule to suit.
- First we look at the mastic on each building and note what needs replacing.
- A fixed quote follows, split by block or building if that suits you.
- Dates, areas and access are agreed so residents or tenants can be told in advance.
- Old sealant is stripped and each face prepared back to firm material.
- Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
- Completed joints are inspected and carry a 12-month workmanship guarantee.
What we need from you
- Move anything stored against the joints
- Agree which areas must stay open
- Send asbestos survey details if the building is pre-2000
Quotes
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 phone 01277 525 020 or email us.
Related advice
Nearby places to Finchley
Other services in Finchley
How the quote is worked out
To price the job, we consider:
- Phasing around occupants
- The total length or number of joints
- Travel to remote or island sites
- Site requirements such as inductions and permits
Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you’ll have a fixed figure to work with.
What to include in your enquiry
There’s no need for a formal survey. These details are enough to start:
- A wide shot and a close-up of the area
- Any dates the work must fit around
- Rough lengths or quantities, or drawings if you have them
- Access details, including height
To get a fixed quote, ring 01277 525 020 or email drawings and photos, telling us the site location and the nature of the job. You can also send details through our quote form.
Commercial clients in Finchley
When you manage a building on behalf of an owner, clear figures and clear communication matter. You get a fixed quote, an agreed scope and a walk round at the end, plus a 12-month guarantee.
Building owners and managing agents use us on sealant work across single buildings or whole portfolios around Finchley. Several sites can go on one quote, so there’s one set of paperwork to deal with.
Why act early in Finchley
Open external joints let water into walls and around frames. That can lead to damp, staining and damage to finishes and those cost far more to put right. Failed sealant in a building in Finchley can quickly affect neighbours, tenants or the floor below: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.
A quote for mastic joints depends on quantities, condition and access, plus any specification you’re working to. Ask us for a fixed quote.
Why clients in Finchley choose us
- Colours confirmed for the specified product
- RAL and finish matching where the product range allows
- Over 20 years of commercial sealing
- Coloured sealants to suit the setting, where available
See how commercial sealant jobs are priced or how we’re accredited.
Looking after the joints
Your facilities or cleaning team can help the joints last. Share these points with them:
- Log resealing dates block by block
- Share the asbestos register when you send details
- Look at the sunniest and most exposed elevations first
- Share your contractor requirements early
Our workmanship is covered for 12 months, so report any failure in that time. Beyond that, routine checks spot the next round of repairs.
One failed perimeter typically means others on the same building are close so a single failure is a sign to check the rest. A planned reseal saves repeated visits.