New Barnet facade sealing
We carry out facade joint and window perimeter sealing on commercial buildings in New Barnet and the surrounding area. Send details for a fixed quote.
- Unsightly perimeter sealant on a visible elevation
- Gaps between rainscreen or cladding panels
- Damp patches beside frames after rain
Need facade sealing in New Barnet?
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Common questions from New Barnet clients
Does your area include sites such as Hadley Manor Trading Estate, near New Barnet?
Yes, sites like Hadley Manor Trading Estate are within our area, along with the rest of New Barnet. To start, just ring 01277 525 020 or send photos by email with the unit, the joints involved and your access times.
Is hospital work, at somewhere like Barnet Hospital, something you do?
Yes, healthcare and care buildings are part of our work. Work is phased so departments keep running, under the site’s own rules.
How long does a typical visit take?
It depends on the scope, though a typical visit typically takes longer on a full elevation than on a handful of window perimeters, and it always depends on dry weather. For bigger or phased jobs, we will set out a timescale with the quote.
When is resealing likely to be due?
It depends on movement, UV and weather, cleaning, traffic and the product. Sealant joints are maintenance items, so inspect them regularly.
Do you provide access for facade work?
That varies with the building and the access on offer. Share what access exists or is planned when you send details, and we’ll plan the work with you.
What hours do you work?
Mention the site’s hours and access windows in your enquiry, and we will schedule the work to suit. You can reach the office between 8am and 5pm, Monday to Friday.
Which sealant do you use on facades?
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.
Facade sealing in New Barnet, done properly
External sealing depends on the weather more than most trades. The sealant needs a dry joint and temperatures inside the maker’s limits. We plan for that and keep you updated. We work on perimeter joints where frames meet the structure, shopfront frames and coping and flashing joints, and the usual reasons a site gets in touch are facade joints cracked through the middle and hard, chalky sealant that no longer flexes. Most enquiries from New Barnet 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.
The ULEZ covers the whole of Greater London, so contractors’ vehicles on a job in New Barnet must meet its standards or pay the daily charge. Add booked delivery slots and limited storage, and a London mastic package needs planning before the first bead.
The 12-month guarantee covers our workmanship: preparation, application and finish. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.
- Place
- New Barnet (EN5, EN4, N20)
- Region
- Greater London
- Guarantee
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Mastic packages on New Barnet sites
Site traffic in New Barnet falls within London’s ULEZ, like everywhere else in Greater London. London sites also mean booked deliveries and limited storage, which the mastic programme has to allow for. A 2-mile radius around New Barnet takes in several hotels. When hotels extend or refit, the work is usually squeezed between peak periods, mastic included.
Hotel extensions and refits, at places such as The Barrington Hotel (0.7 miles west of New Barnet), usually run between busy periods, so the sealing is squeezed into short windows. When a college such as Oak Hill College (to the east of New Barnet) builds or refurbishes, the mastic package typically has to fit around students and staff. On a campus such as Middlesex University, 4.5 miles south-west of New Barnet, new teaching buildings and residences are usually built and refurbished around the academic year.
New Barnet is about 1 mile east of Barnet, in Greater London. Looking for facade sealing in New Barnet? We can help, as we do across Greater London. New Barnet is one of 764 places we cover in Greater London for facade joints. For work in that direction, see our London page (11 miles or so).
Postcode districts covered here: EN5, EN4 and N20 for facade joints. If your site is on York Road, Park Road and Henry Road or close by, we can quote for facade joints. Close to New Barnet, our area also takes in Barnet (1 mile west), Cockfosters (1 mile north-east), East Barnet (1 mile south-east), Underhill (1 mile west) and Whetstone (1 mile south). Nearby towns on our patch include London (11 miles south), City of Westminster (9 miles south), Marylebone (9 miles south), Kensington (10 miles south), St Pancras (8 miles south) and Shoreditch (9 miles south-east).
Local landmarks in New Barnet
Around New Barnet, our work takes us to commercial buildings near Trent School Cockfosters, East Barnet School and The Alexandra pub and the streets around them. There’s a railway station in New Barnet itself: New Barnet station. Nearby you will also find Spires Shopping Centre (1.6 miles north-west) and Francis Skaryna Belarusian Library and Museum (2 miles south). The countryside around New Barnet includes Greenhill Gardens and Darland's Lake.
Nearby places to New Barnet
Also in New Barnet
What sets the cost
To price the job, we consider:
- Phasing around occupants
- Distance, for remote addresses
- Any access equipment needed
- Induction, permit and paperwork requirements
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 we’ll put a fixed figure on it.
What we need to price the job
Whether it’s one area or a whole building, the same details help:
- Whether the building will be occupied during the work
- The site address and postcode
- Photos of the joints, close up and from further back
- Whether an asbestos survey exists
Let us know the site, the scope and your timescale, and we’ll put a fixed quote together. To get it moving, ring 01277 525 020 or email us.
Why deal with it now?
Leaving failed perimeter sealant also makes the eventual job bigger: wet edges break down, so repairs may be needed before resealing. Early action keeps it simple. Repeat call-outs disrupt occupied London buildings, so a proper job first time, with the old sealant fully removed, is worth it.
Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.
Why appoint us
- Fully insured, including public liability cover
- CHAS accredited contractor
- Colours confirmed for the specified product
- Matching to RAL references, product permitting
Take a look at how commercial sealant jobs are priced or our accreditations.
On site: what to expect
Inspect, seal, sign off: every visit follows that pattern. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and the job ends with a walk round and sign-off. In New Barnet, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Phased work keeps the rest of the building in use.
- We plan access and the order of elevations with the client.
- Weather and temperature are checked against the product’s limits.
- Each joint is cut out and the edges inspected.
- Faces are cleaned, primed where needed and backed.
- Facade-grade sealant goes in and is tooled to a tidy concave profile.
- Once signed off, the work carries our 12-month guarantee.
Preparing the site
- Send asbestos survey details if the building is pre-2000
- Have the specification and drawings to hand
- Make sure the joints can be reached
Ask for a quote
To get a fixed quote, give us a call on 01277 525 020 or email the details over, telling us the site location and the nature of the job. Our quote form is another easy route.
Read more
Should maintenance staff do it?
General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class, which is what makes a joint last.
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.
Keeping the joints sound
Keep the joints in good shape with a few simple steps:
- Keep the sealant details on the building file
- Plan facade sealing alongside redecoration
- Never let anyone seal over old sealant
- Report water ingress at frames as soon as it shows
Following storms, look inside for damp or staining near frames. Catching a new leak early keeps the repair small.
Tie resealing in with redecoration, cladding repairs or other access. Sharing the access keeps the cost down.
Building owners, agents and FMs in New Barnet
We take on planned maintenance as well as one-off repairs: working through a building or an estate in stages that fit your budget. New Barnet can form part of a wider programme across Greater London.
Agents, factors and owners’ representatives all follow the same route: send the details, accept a fixed quote, and we carry out and guarantee the work. We can agree access arrangements and keyholder contacts beforehand.