Facade and window perimeter sealing in Blackfriars, City of London
Work needed on a facade joint in Blackfriars? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Staining on stone next to old sealant
- Air leaks through failed facade joints
- Perimeter sealant that has split or peeled away
Facade sealing for Blackfriars sites
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Facade sealing in Blackfriars, done properly
We seal window and door perimeters, cladding panel joints, external facade joints and perimeter joints where frames meet the structure. Where sealant is the specified fix, we also take on coping and flashing joints. If you have staining on stone next to old sealant and cold air coming in at window perimeters, we can put it right. One point of contact handles commercial sealant work in Blackfriars from the first photographs to the final walk-round, whether it’s one building or several.
The ULEZ covers the whole of Greater London, so contractors’ vehicles on a job in Blackfriars 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.
Whoever the client is, the cover is the same: 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.
- Where
- Blackfriars (SE1, EC1M, EC1N)
- Region
- City of London
- Cover
- A 12-month guarantee
- Quote
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Common questions from Blackfriars clients
Do you take on work at healthcare sites like St Bartholomew's Hospital?
Yes, hospitals are one of the sectors we cover. Work is phased so departments keep running, under the site’s own rules.
Can you work at a site such as Grand Vitesse Industrial Estate, by Blackfriars?
Yes, sites like Grand Vitesse Industrial Estate are within our area, along with the rest of Blackfriars. Photos and a short description are enough for a first look.
Are your applicators CSCS-carded?
Yes. We use CSCS-carded applicators, which many sites require.
How do we ask for a quote?
There are four steps: send details, get a quote, we seal, guaranteed. The first step only needs photos and a postcode.
Does weather matter for sealant work?
It can, for external work. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so external work may be moved if conditions aren’t right. Internal work is far less affected.
Can you handle several sites?
Yes. A group of buildings can go on one quote, and you deal with one contact throughout across South East England, Greater London and Scotland.
Do you work to architects’ specifications?
Yes. We follow the specification, along with the manufacturer’s installation guidance.
Owners, agents and contractors
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. Keys, access and contacts can be agreed in advance.
Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Blackfriars can form part of a wider programme.
Facades, frames and programmes in Blackfriars
There are a good number of hotels within about 2 miles of Blackfriars. When hotels extend or refit, the work is typically squeezed between peak periods, mastic included. The ULEZ covers the whole of Greater London, Blackfriars included, so site vehicles need to meet its standards or pay the daily charge. Deliveries are booked and storage is tight, so mastic materials come in as needed.
Hospital estates such as St Bartholomew's Hospital, under half a mile north-east of Blackfriars, tend to grow and change in phases, often next to occupied wards, so facade and perimeter sealing has to fit the estates team’s plan. For contractors at a college like The Royal College of Radiologists (0.7 miles west of Blackfriars), perimeters and internal sealant are timed for the holidays. Work at a hotel such as Club Quarters Hotel (to the north-east of Blackfriars) tends to be programmed around bookings, mastic included.
Blackfriars is about 1 mile north-west of London, in City of London. Anywhere in SE1, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. 7 places across City of London fall within our area, Blackfriars among them.
We cover the SE1, EC1M and EC1N postcode districts. We cover commercial and managed buildings on Oat Lane, Bear Lane and Shoe Lane. You’ll find Blackfriars on or near the A4 and A40, so getting applicators and materials to site is simple. We also cover Temple (1 mile west), Temple Bar (1 mile west), Bankside (1 mile south-east), Smithfield (1 mile north) and Clare Market (1 mile west) for facade joints.
Around Blackfriars
We work on buildings around The Black Friar pub, Bernie Spain Gardens and London Nautical School, among other places. Other local landmarks include St Alban's Church of England Primary School (0.6 miles north-west), Barts Health Archives (less than half a mile north-east) and St Mary-at-Hill (0.9 miles east). There’s a railway station in Blackfriars itself: London Blackfriars station. Well-known places in the area include Montfichet's Tower (less than half a mile north-east) and St Brides Crypt Museum (under half a mile north-west). Open spaces near Blackfriars include St. James's Park Lake and Ludgate Hill.
Keeping the joints sound
For the best life from the joints:
- Confirm the survey covers external sealants in older buildings
- Investigate damp beside windows promptly
- Record the product and colour used on each elevation
- Inspect facade joints on a regular cycle
Keep a note of which product went in and when. Future work can then match the product and colour.
Use each reseal to correct the joint: the right width, backing rod and a sealant with enough movement capability. A well-designed joint lasts longer than a like-for-like copy of a failed one.
What we can’t put right
Part of a good diagnosis is knowing where sealant stops. We will tell you if the real problem is one of these:
- Water getting in through cracked render or porous masonry
- Replacing glass or failed glazing units
- Cracked or spalling substrates that need repair before sealing
If in doubt, ring 01277 525 020 or use the quote form and we will say what we think.
Surfaces we seal
- Shopfront frames
- Coping and flashing joints
- Cladding panel joints
- Window and door perimeters
- Perimeter joints where frames meet the structure
- Stone and brick facade joints
Should maintenance staff do it?
For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
Surface by surface
Precast concrete panels
Precast panel joints have to absorb thermal and structural movement. We use a sealant with the right movement capability, set over backing rod, primed where the maker specifies.
Brick and stone facades
Joints in natural stone need care to avoid staining. The specified stone-compatible sealant is what we use.
Also near Blackfriars
Other services in Blackfriars
How a job runs
Working in a building that stays open takes some planning. We sign and contain the area we’re in, with routes through the building left open and move on in phases so staff and visitors can carry on around us. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- 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.
- The existing bead comes out in full.
- Primer is applied where the maker specifies it.
- Backing rod is fitted and the new sealant gunned in and tooled.
- The finished joints are checked with you.
What we need from you
- Tell us your opening times and when work is allowed
- Make sure the joints can be reached
- Point out parking and an unloading spot
Getting a fixed quote
Photos, drawings or a schedule of the joints and a fixed quote comes back to you. Where a site visit makes more sense, we’ll arrange one.