Facade and window perimeter sealing in East Finchley, Greater London
Commercial sealant work in East Finchley for contractors, FMs and building owners: facade joint and window perimeter sealing on commercial buildings, with a fixed quote first.
- Discoloured or dirty facade joints
- Air leaks through failed facade joints
- Previous reseals run over old sealant
Facade sealing for East Finchley sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Cost factors for facade joints
We price every job individually. The things that drive the figure:
- Distance, for remote addresses
- The product specified
- Phasing around occupants
- How much there is to seal
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.
What we need to price the job
However big the job, the same details help:
- The type of building and who uses it
- The site address and postcode
- Approximate linear metres or a joint schedule
- Specification clauses that apply
Need a figure for a tender or a budget? Send the scope and any drawings, and we will return a fixed quote you can plan around. If you have questions first, give us a call on 01277 525 020 or use the quote form.
Facade sealing in East Finchley, done properly
Some clients need every window on a block resealed; others need a few leaking frames sorted. The approach doesn’t change with the size: old sealant out, faces cleaned, depth set and a new bead tooled in. A 12-month guarantee applies to our workmanship. If you have cladding panel joints that have opened up and unsightly perimeter sealant on a visible elevation, we can put it right, whatever the surface. A specialist sealant contractor works differently from a general builder: on jobs in East Finchley, preparation and product choice get the time they need.
Construction in a London area such as East Finchley means working on constrained sites: small compounds, delivery slots and shared hoists and scaffold. Mastic is normally one of the last trades on each elevation or floor, so we keep to the programme and the order of trades the site sets.
The 12-month guarantee covers our workmanship: preparation, application and finish. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.
- Location
- East Finchley (N2, N3, NW11)
- Region
- Greater London
- Guarantee
- 12 months on every job
- Price
- A fixed quote before we start
- Call
- 01277 525 020
- Page updated
- 3 November 2026
When something else is needed
A proper diagnosis includes knowing what sealant can’t do. You will hear from us if the cause turns out to be one of these:
- Cracked or spalling substrates that need repair before sealing
- Arranging specialist high-level access, which is planned with the client
- Replacing glass or failed glazing units
If in doubt, ring 01277 525 020 or email the details over and we’ll say what we think.
Where we work in East Finchley
- Window and door perimeters
- Coping and flashing joints
- Shopfront frames
- Stone and brick facade joints
- Cladding panel joints
- Perimeter joints where frames meet the structure
Common questions from East Finchley clients
Will you take on work at estates like Finchley Industrial Centre, close to East Finchley?
Yes. Estates, retail parks and business parks around East Finchley, Finchley Industrial Centre among them, are all within reach. Photos and a short description are enough for a first look.
Can you work around term dates at a campus such as Middlesex University?
Yes. Education sites normally want the work in vacations or in phases during term, and we plan to suit. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.
Is any job too small?
Single areas, one-off repairs and whole buildings are all quoted the same way: details, then a fixed price, then sealing, then a 12-month guarantee.
How long will the new sealant last?
It depends on movement, UV and weather, cleaning, traffic and the product. Treat them as maintenance items and inspect them regularly.
Do you use silicone for external joints?
Low-modulus, neutral-cure silicone suits many facade and perimeter joints. Hybrid or MS polymer, polyurethane and polysulphide sealants suit others, depending on the substrate and the specification.
Is it fine to apply new sealant on top of old?
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.
Do you cover East Finchley?
Yes. East Finchley falls within our area, and the simplest way to start is to speak to us on 01277 525 020 or send details through our quote form.
Looking after the joints
Regular inspection catches problems early. In particular:
- Never let anyone seal over old sealant
- Walk the elevations once or twice a year
- Brief window cleaners about newly sealed joints
- Don’t wait for a second leak before calling
Let the new sealant cure before washing the facade or windows near it. Keep high-pressure jets and strong chemicals away from new sealant, so brief your window cleaners.
Tie resealing in with redecoration, cladding repairs or other access. Sharing the access keeps the cost down and cuts time on site.
Owners, agents and contractors
As a CHAS accredited contractor and Constructionline member, we’re straightforward to vet for your supplier list. We’re fully insured, and our insurance certificate can go with the quote.
Whether you are a managing agent, a property factor or an owner’s representative: send details, get a fixed quote, we seal, guaranteed. We can agree access arrangements and keyholder contacts beforehand.
Facade sealing in East Finchley: the local picture
As part of Greater London, East Finchley is inside the ULEZ, which applies to every van on site. Deliveries are booked and storage is tight, so mastic materials come in as needed. A 2-mile radius around East Finchley takes in plenty of hotels. Hotel extensions and refits typically have to fit around bookings, so mastic dates are tight.
When units on a site such as Finchley Industrial Centre, 2 miles to the north of East Finchley, are refurbished or reclad, the panel joints and window perimeters are part of the mastic package. New wings at hospitals like Finchley Memorial Hospital, 1.1 miles north of East Finchley, bring long runs of window and panel joints to seal. For contractors on a campus like Middlesex University, 2.9 miles to the west of East Finchley, facade and perimeter sealing has to fit around students and term dates.
East Finchley is about 5 miles north of Marylebone, in Greater London. We cover commercial sites throughout East Finchley, whether it’s a single job or part of a planned programme. Our Greater London coverage takes in 764 places, large and small. Our London page has more on work in that area.
Commercial sites across N2, N3 and NW11 are covered. We cover commercial and managed buildings on Oak Lane, Maya Road and High Road and the roads nearby. You will find East Finchley on or near the A1. Sites close to East Finchley are covered too, including Hampstead Garden Suburb (1 mile south-west), Fortis Green (1 mile east), Temple Fortune (1 mile south-west), Muswell Hill (1 mile east) and Golders Green (2 miles south-west). Nearby towns on our patch include London (7 miles south-east), City of Westminster (5 miles south), Marylebone (5 miles south), Kensington (6 miles south), St Pancras (5 miles south-east) and Shoreditch (6 miles south-east).
Landmarks near East Finchley
Locally, jobs take us to sites close to Tollington School, Francis Skaryna Belarusian Library and Museum and Bishop Douglass School Finchley and the streets around them. Also close by are Lyttelton Playing Fields (0.5 miles south) and The Bald Faced Stag pub (0.5 miles east). For rail, the closest station is New Southgate station, roughly 2.2 miles north-east of the centre. Nearby you’ll also find Grand Arcade (1.6 miles north) and Jewish Museum - Finchley (0.7 miles north-west). Green spaces nearby include Highgate Hill and Long Lane Pasture.
Towns and villages near East Finchley
What else we do in East Finchley
How a job runs
On arrival, we sign in, go through any site induction and check how permits are handled. Floors, finishes and fittings next to the joints are covered before any cutting starts, and the work normally takes anything from a single day to several weeks, depending on joint lengths, access and the weather. Planning a London job such as one in East Finchley starts with access. Send the building rules and access times with your enquiry.
- We plan access and the order of elevations with the client.
- We only seal when joints are dry and within the product’s temperature range.
- Each joint is cut out and the edges inspected.
- Faces are cleaned, primed where needed and backed.
- Sealant is gunned in and tooled hard onto both faces.
- Once signed off, the work carries our 12-month guarantee.
Before we start on site
- Tell us what induction or permit system the site runs
- Tell us your opening times and when work is allowed
- Warn occupants and staff about the work
Getting a fixed quote
Send us photographs, drawings or a joint schedule are often enough for a fixed quote. If the job needs a look first, we will arrange a site visit.
Read more
How the job changes by surface
Cladding panel joints
Panel joints on cladding and rainscreen systems take movement every day. The sealant has to match the movement and the panel finish.
Perimeter joints at frames and structure
The joint around a framed system, where it meets the structure, needs sealant. We seal those perimeter joints.