Facade Sealing contractors in Islington
We carry out facade joint and window perimeter sealing on commercial buildings in Islington. Send photos or drawings for a fixed quote.
- Old perimeter mastic that has dried out
- New sealant peeling off old mastic
- Sealant pulling away from frames or panels
Facade sealing for Islington sites
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
About our facade sealing in Islington
Most facade joint failures trace back to the joint, not just the sealant. The width has to suit the expected movement and the sealant’s movement capability, while rod fixes the depth and stops the bead sticking to the rear. The enquiries we see most involve failed seals around shopfront and entrance frames and old perimeter mastic that has dried out, on coping and flashing joints, window and door perimeters and shopfront frames. Looking for mastic applicators who cover Islington? Mastic Doctor has worked for contractors, FMs and building owners since 2005.
A great deal of London construction is refurbishment of occupied or part-occupied buildings, alongside new blocks. New frames, overcladding and fit-outs all end in perimeter and facade joints, frequently with occupants close by.
Building owners and contractors get the same cover: a 12-month guarantee on our workmanship. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.
- Place
- Islington (N1, N7, NW1, EC1V)
- Region
- Greater London
- Guarantee
- A 12-month guarantee
- Quote
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Common questions from Islington clients
Can work at a site such as Paris Dauphine University - London Campus fit around teaching?
Yes, holiday working periods are the norm on campus jobs. Let us know which documents your site asks for, and we will confirm them alongside the quote.
Does your area include sites such as Roman Way Industrial Estate, near Islington?
Yes. Our area takes in Islington and its surroundings, with estates and business parks such as Roman Way Industrial Estate included. Send details of the unit and the work through our quote form for a quick quote.
How do you choose the sealant?
A specification, where there is one, decides it. If there isn’t one, it comes down to the joint: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.
How do we ask for a quote?
You can use the quote form on this site; alternatively, call the office on 01277 525 020 or email drawings and photos. Photos, drawings or a joint schedule help us quote quickly.
Can you look at water coming in around a frame?
Yes. We check the sealant joints and report what we find as part of pricing. Where the cause seems to be elsewhere, we’d rather tell you than reseal pointlessly.
How soon can the area be used again?
Curing time varies by product, and we confirm it on the day, and flag anything to keep off until it has cured.
Do you use silicone for external joints?
The product follows the joint’s movement, the surfaces and the specification. Specifications often refer to BS EN 15651-1 for facade sealants or BS EN 15651-2 for glazing and we follow the specified product.
Honest limits
A few problems need another trade or a different fix, and we point that out rather than sealing over them:
- Movement beyond what any sealant can handle
- Specialist high-level access methods
- Work on the window or framing system itself
If in doubt, phone 01277 525 020 or email us and we’ll say what we think.
Where we work in Islington
- Shopfront frames
- Cladding panel joints
- Perimeter joints where frames meet the structure
- Window and door perimeters
- Stone and brick facade joints
- Coping and flashing joints
Owners, agents and contractors
Housing associations and managing agents often need work done across blocks and communal areas. We phase the work so people keep access, and each stage is agreed with your contact.
Whether you’re 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.
Do you need facade sealing in Islington?
The wrong product causes its share of trouble: acetoxy-cure silicone may mark stone or corrode certain metals, and an interior product won’t last outdoors. Most external joints call for a neutral-cure, facade-grade sealant.
Any of the following is a good reason to get the joints checked over:
- Perimeter joints where frames meet the structure
- Old perimeter mastic that has dried out
- Discoloured or dirty facade joints
- Leaks at window and door perimeters
Hotel extensions and refits, at places such as Hotel Makedonia, which lies north-west of Islington, normally run between busy periods, so the sealing is squeezed into short windows.
What to look for in a quote
- The named product and why it was chosen
- Their pre-qualification and accreditations
- How the joint faces will be prepared and primed
- Will CSCS-carded applicators be on site?
Different surfaces, different methods
Perimeter joints at frames and structure
Perimeter joints at frames often show their age first. We cut them out, prepare both faces and reseal to the specification using a sealant classified for that use.
Cladding panel joints
Joints between cladding panels open and close with temperature. The sealant has to match the movement and the panel finish, as the specification sets out.
Diagnose, treat, sign off
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Joint faces are cleaned back to sound, dry surfaces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly. For a job in Islington, access comes first: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Send the building rules and access times with your enquiry.
- We start with photos, drawings or a visit to see the joints and agree access.
- We confirm the joint type, movement and the specified product.
- Failed beads are removed in full and both faces cleaned back.
- Primer is applied where the maker specifies it.
- Rod goes in to fix the depth, then the joint is sealed and tooled.
- We go over the completed work with you before leaving.
Before we start on site
- Point out any areas we must not close
- Tell us your opening times and when work is allowed
- Tell us what induction or permit system the site runs
Request a quote
Every quote starts with the facts: the joints involved, quantities, access and the product called for. Send what you have, and we will arrange a site visit if anything is unclear.
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Towns and villages near Islington
More services for Islington
Facade sealing in Islington: the local picture
Plenty of hotels sit less than 2 miles from Islington. Hotel extensions and refits usually have to fit around bookings, so mastic dates are tight. The ULEZ covers the whole of Greater London, Islington included, so site vehicles need to meet its standards or pay the daily charge. London sites also mean booked deliveries and limited storage, which the mastic programme has to allow for.
On a healthcare site such as Moorfields Eye Hospital (City Road campus), 1 mile south-east of Islington, new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully. For contractors at a college like City and Islington College, 0.6 miles south of Islington, perimeters and internal sealant are timed for the holidays.
Islington is about 3 miles north-east of City of Westminster, in Greater London. Islington sits inside our coverage, with the same fixed quotes and 12-month guarantee as everywhere else. Islington is one of 764 places in Greater London on our list.
Commercial sites across N1, N7, NW1 and EC1V are covered. Among the streets we cover are Gibson Square, Old Royal Free Square and Cloudesley Square. Islington sits on or close to the B515 and A5203. If your building is just outside Islington, we cover Pentonville (1 mile south), Angel (1 mile south), Barnsbury (1 mile north-west), Clerkenwell (1 mile south) and Lower Holloway (1 mile north-west). Further afield, our area takes in London (3 miles south), City of Westminster (3 miles south-west), Kensington (5 miles south-west), Walthamstow (5 miles north-east), Hampstead (3 miles west) and Ruislip (13 miles west).
Near you in Islington
We work on buildings around Islington Green School, The King's Head Public House and Pilsudski Institute of London and the streets around them. You’ll also find Barnard Park (less than half a mile south-west) and St Mary's CofE Primary School (less than half a mile east). Islington has its own railway station: Essex Road station. A little further out are King's College Hospital Charity (0.7 miles north-west) and Montfichet's Tower (1.7 miles south). Not far away are Barnsbury Wood and Ludgate Hill.
Should maintenance staff do it?
Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong usually costs more in the end than doing them right.
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.