The Mastic Doctor team standing beside their branded vans outside an office building
Greater London · England

Facade and window perimeter sealing in Dalston, Greater London

Work needed on a facade joint in Dalston? We look at it, seal it with the right product and hand it over with a 12-month guarantee.

  • Cladding panel joints that have opened up
  • Cold air coming in at window perimeters
  • Staining on stone next to old sealant
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
London, the South East & Scotland
CHAS accredited
£5m PL insurance

Need facade sealing in Dalston?

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Facade sealing for commercial buildings in Dalston

A good facade joint depends on design as much as product. The width has to suit the expected movement and the sealant’s movement capability, and closed-cell rod sets the depth, keeping the bond to two faces with the ratio the sealant maker recommends, often around 2:1. We work on coping and flashing joints, shopfront frames and stone and brick facade joints, and the usual reasons a site gets in touch are weathered joints at frame-to-structure perimeters and weathered facade joints that have lost their grip. A single leaking joint is often how a building in Dalston first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.

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, so tidy, well-planned work matters.

Every job we finish is backed by a 12-month workmanship guarantee, wherever the site is. If our installation lets you down in that time, we return and fix it.

Location
Dalston (E8, N1, N16)
Region
Greater London
Guarantee
12 months on every job
Quote
Quoted before any work starts
Call
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Quoting for work in Dalston

Your fixed quote is built from the real scope. It allows for:

  • The size and state of each joint
  • Any access equipment needed
  • Whether the work must be split into stages
  • Induction, permit and paperwork requirements

The product called for affects the cost, as does the preparation each joint needs. Access, phasing and site requirements come into it too.

Sending details for a quote

Diagnosis starts before we arrive. Tell us:

  • Any specification or named product
  • How the joints are reached, and at what height
  • Drawings or a marked-up plan, if available
  • What the building is and how it’s used

Need a figure for a tender or a budget? We’ll quote against your scope and drawings you can plan around. If you have questions first, ring 01277 525 020 or email drawings and photos.

Surface by surface

Window and door perimeters

Frame-to-wall joints at windows and doors are the facade joints we reseal most. A low-modulus, neutral-cure product suits most frame-to-wall joints finished to throw water off the joint.

Brick and stone facades

Brick and stone facades have perimeter and movement joints that need a compatible sealant. We avoid acetoxy silicone, which can stain some natural stone, and primers go on where specified.

When something else is needed

We seal joints; we don’t mend everything behind them. Sealant alone won’t deal with:

  • Movement beyond what any sealant can handle
  • Arranging specialist high-level access, which is planned with the client
  • Leaks from roofs, gutters or failed flashings rather than sealant joints

If you’re not sure, just call 01277 525 020 or email drawings and photos and we will give you a straight answer before you book.

What we seal

  • Window and door perimeters
  • Stone and brick facade joints
  • Cladding panel joints
  • Shopfront frames
  • Coping and flashing joints
  • Perimeter joints where frames meet the structure

Dalston: questions and answers

Can you take on a job at a hospital such as Homerton University Hospital?

Yes. Healthcare sites are among the places we work. The estates team’s permit system and infection-control rules come first, and the work is planned around them.

Can you work in a London building with booked loading and goods-lift slots?

Yes, we plan every London job around the building’s own access rules. Say when the building is occupied and when it’s quiet, and we’ll plan accordingly. All of Greater London is inside the ULEZ, and our planning allows for it

Will you come and look before quoting?

It depends on the job. Straightforward work can often be priced from photographs and measurements, and bigger or more complex jobs typically get a visit.

What’s the quickest route to a quote?

The quote form is the simplest route, though you can also speak to us on 01277 525 020 or email us. Include photos or drawings if you have them.

Can the sealant be colour-matched?

Often, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We’ll confirm the colours available for the specified product.

Is old mastic on our building likely to contain asbestos?

It’s worth checking in any building from before 2000. The duty to manage asbestos sits with the dutyholder. Suspect material is left alone until it has been tested.

Can the building stay open while you work?

In most cases, yes. We phase the work so most of the building stays in use, with each area protected and signed.

When to bring in a specialist

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. A poor seal in places like these tends to cost more to put right later.

General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint, which is what makes a joint last.

Our process

Before we leave any area, we remove the tape, clean down and inspect every joint with your site contact. Where the sealant needs time to cure before use, we tell you and sign the area. Most London premises stay occupied while we’re on site, so we agree zones and timings with the building or facilities manager. Phased work keeps the rest of the building in use.

  1. We look at the joints, the drawings and the access before pricing.
  2. Failed sealant is cut out along its full length.
  3. Joint faces are cleaned to firm, sound material, with primer where the sealant maker specifies it.
  4. Backing rod, or bond-breaker tape in shallow joints, limits the depth.
  5. A facade-grade sealant rated for the movement goes in, tooled to a concave profile.
  6. The completed runs are checked with you, then the 12-month guarantee applies.

Getting the site ready

  • For older buildings, check the asbestos register before work
  • Tell us your opening times and when work is allowed
  • Agree which areas must stay open

Get a fixed quote

A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Share whatever details you have and we’ll fill any gaps with a visit.

Get a price

Read more

Facades, frames and programmes in Dalston

Site traffic in Dalston falls within London’s ULEZ, like everywhere else in Greater London. Deliveries are booked and storage is tight, so mastic materials come in as needed. Dalston has plenty of hotels close by, all within 2 miles. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up.

For contractors at a college like New City College, 1.1 miles to the south of Dalston, perimeters and internal sealant are timed for the holidays. New units and refits on sites such as Bayford Street Industrial Centre, 0.7 miles to the south-east of Dalston, need their panel and perimeter joints sealed to the specification. For a contractor at a hotel such as Kip Hotel, 0.6 miles east of Dalston, the mastic often has to be finished before a reopening date.

Dalston is about 1 mile north-east of Hoxton, in Greater London. Businesses, contractors and managing agents in Dalston can call on us for facade joints, as part of our coverage of Greater London. 764 places across Greater London fall within our area, Dalston among them.

If you need facade sealing in E8, N1 and N16, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. Streets here include Glebe Road, Forest Road and Boleyn Road, and sites on any of them can send details for a fixed quote. Main routes into Dalston include the A107 and A1207, useful when we plan access and materials. If your building is just outside Dalston, we cover Kingsland (1 mile west), De Beauvoir Town (1 mile west), Hackney Central (1 mile east), London Fields (1 mile south-east) and Shacklewell (1 mile north). Further afield, our area takes in London (3 miles south), City of Westminster (4 miles south-west), Marylebone (4 miles south-west), Kensington (6 miles south-west), Walthamstow (4 miles north-east) and Hampstead (5 miles west).

Near you in Dalston

Locally, jobs take us to sites close to Kingsland Secondary School, The Petchey Academy and The Duke Of Richmond Public House. Also close by are Haggerston Park (0.8 miles south) and Bishopsgate Institute Special Collections and Archives (1.9 miles south). There’s a railway station in Dalston itself: Dalston Junction station. A little further out are Clowns Gallery-Museum (less than half a mile west) and Montfichet's Tower (2.6 miles south-west). Not far away are Gillespie Park and Ludgate Hill.

Map of Dalston © OpenStreetMap contributors

Aftercare for building managers

Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. We suggest:

  • Don’t wait for a second leak before calling
  • Walk the elevations once or twice a year
  • Confirm the survey covers external sealants in older buildings
  • Plan facade sealing alongside redecoration

Record the sealant type and date on the building file. Future work can then match the product and colour without guesswork.

In pre-2000 buildings, check the asbestos register before old sealant is cut out. Older sealants can contain asbestos, and if it’s suspected, we stop until it has been tested.

Accreditations

Trusted. Accredited. Insured.