Facade and window perimeter sealing in Hackney, Greater London
Facade sealing in Hackney, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.
- Draughts around frames and panels
- Weathered facade joints that have lost their grip
- Discoloured or dirty facade joints
Facade sealing across Hackney
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
About our facade sealing in Hackney
We don’t install glazing systems or replace glass. What we seal are the joints around them: perimeter joints where frames meet the structure, panel joints and window perimeters, using sealants classified for facade or glazing use. Site teams most often ask us about failed sealant on precast panel joints and damp patches beside frames after rain, on perimeter joints where frames meet the structure, window and door perimeters and stone and brick facade joints. Searching for sealant specialists in Hackney? 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. Replacement windows, recladding and fit-outs leave perimeter and facade joints to seal, often next to people still using the building.
Our workmanship is guaranteed for 12 months, wherever the site is. If our installation lets you down in that time, we return and fix it.
- Place
- Hackney (E9, E8, E3, E5)
- Wider area
- Greater London
- Cover
- 12 months on our workmanship
- Quote
- Quoted before any work starts
- Call
- 01277 525 020
- Last updated
- 3 November 2026
What we can’t put right
Honesty saves time and money. Fresh joints won’t solve:
- Leaks from roofs, gutters or failed flashings rather than sealant joints
- Render or concrete edges that have broken away
- Movement beyond what any sealant can handle
If in doubt, give us a call on 01277 525 020 or email us and we will say what we think before you book.
Surfaces we seal
- Shopfront frames
- Coping and flashing joints
- Window and door perimeters
- Perimeter joints where frames meet the structure
- Cladding panel joints
- Stone and brick facade joints
Commercial clients in Hackney
Main contractors use us as their sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules, with CSCS-carded applicators on site.
Facilities managers want contractors who arrive with the paperwork sorted. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we will confirm them with the quote.
Hackney: questions and answers
Do you work in London buildings with loading restrictions?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. Say when the building is occupied and when it’s quiet, and we will plan accordingly. The ULEZ covers the whole of Greater London, which we allow for
Can you take on a job at a hospital such as Homerton University Hospital?
Yes. Healthcare sites are among the places we work. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.
Are you CHAS accredited?
Yes. Mastic Doctor is CHAS accredited and a Constructionline member.
Do you run new sealant over the existing bead?
No. Overlaying is a shortcut that peels away quickly. We remove the failed sealant, clean the faces, set the depth and reseal.
Can you work while the building is occupied?
In most cases, yes. Phased work can be planned so areas stay in use.
Do you provide access for facade work?
That comes down to the access arranged for the job. Share what access exists or is planned when you send details, and we’ll plan the work with you.
Will you come and look before quoting?
It depends on the job. Simple work can often be priced from photos, and bigger or more complex jobs normally get a visit.
After the work
Your facilities or cleaning team can help the joints last. Share these points with them:
- Plan facade sealing alongside redecoration
- Check that rainwater leaves the facade the way it was designed to
- Ask about asbestos in pre-2000 mastic
- Avoid harsh cleaners on facade sealant
Keep gutters, sills and drainage paths clear. Sealant copes better when water runs off the facade as designed rather than sitting against the joints.
Coordinate facade sealing with other external works. One set-up for several trades saves money and cuts time on site.
Why it’s worth doing now in Hackney
Each spell of rain drives water past a failed facade joint. Behind the frame, that can mean damp plaster, stained ceilings, corroded fixings and damaged insulation. Resealing early costs far less than repairing what the water reaches. In a London building, a failed joint rarely affects only one party: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.
Access often affects the price as much as the sealing: joints within easy reach take less time than ones that need access equipment. Tell us how the joints are reached and call for a quote.
What you get with us
- CHAS accredited contractor
- Products installed to the manufacturer’s instructions
- Colour options checked against the specified product
- Constructionline member for supplier checks
Read how commercial sealant jobs are priced or our accreditations and insurance.
Facade sealing in Hackney: the local picture
A 2-mile radius around Hackney takes in a good number of hotels. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up. Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in Hackney. London sites also mean booked deliveries and limited storage, which the mastic programme has to allow for.
Hotels like Kip Hotel, 0.5 miles north-west of Hackney, rarely close for long, so refurbishment mastic is phased floor by floor. Units on estates such as Bayford Street Industrial Centre (0.5 miles south-west of Hackney) tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal.
Hackney is about 4 miles north-east of London, in Greater London. Our applicators travel to Hackney for work on facade joints. Hackney is one of 764 places we cover in Greater London.
We take on facade joints across the E9, E8, E3 and E5 postcode area, whatever the building. Buildings on Homerton High Street, Primrose Square and St John's Church Road are within our area. Being close to the A107 and B113, Hackney is straightforward for us to reach. Nearby places we also cover include Homerton (1 mile north), Lower Clapton (1 mile north), Hackney Central (1 mile west), London Fields (1 mile south-west) and Cambridge Heath (1 mile south-west). A short drive away, we cover London (4 miles south-west), City of Westminster (5 miles south-west), Marylebone (5 miles south-west), Kensington (7 miles south-west), St Pancras (3 miles west) and Walthamstow (3 miles north).
Near you in Hackney
We work on buildings around The Urswick School, Clapton Park and Chesham Arms. There’s a railway station in Hackney itself: Homerton station. Other landmarks nearby include Hackney Walk (less than half a mile north-west) and Cell Project Space (0.9 miles south-west). Open spaces near Hackney include Tower Hill and Old Ford Island.
Our process
We schedule the visit to fit the site hours and access windows you give us. While we’re working, the area stays contained and tidy, and your contact hears from us before we move to the next area. Planning a London job such as one in Hackney starts with access. Give us the hours we can be on site and we’ll schedule to suit.
- Photos, drawings or a visit tell us about the joints and the access.
- Product choice follows the joint’s movement and substrate.
- Failed beads are removed in full and both faces cleaned back.
- Primer is applied where the maker specifies it.
- Backing rod is fitted and the new sealant gunned in and tooled.
- We go over the completed work with you before leaving.
Getting the site ready
- Flag any permit to work we will need
- Confirm the product named in the specification
- For older buildings, check the asbestos register before work
Quotes
Pricing a project or setting a maintenance budget? We’ll quote against your scope and drawings you can plan around. If you have questions first, phone 01277 525 020 or email a schedule or drawings.
Read more
Do you need facade sealing in Hackney?
New sealant run over old sealant rarely holds. Fresh silicone won’t stick to cured silicone.
It’s worth sending us details if you spot any of the following:
- Staining on stone next to old sealant
- Weathered joints at frame-to-structure perimeters
- Air leaks through failed facade joints
- Cladding panel joints that have opened up
On a campus such as Loughborough University London, which lies east of Hackney, new teaching buildings and residences are normally built and refurbished around the academic year.
Comparing quotes
- How they’ll work around occupants
- How long is the guarantee, and what does it include?
- Proof of insurance
- Are they CHAS accredited or on Constructionline?