Facade Sealing in South Hampstead
Planning work on a facade joint in South Hampstead? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Hard, chalky sealant that no longer flexes
- Air leaks through failed facade joints
- Failed seals around shopfront and entrance frames
Need facade sealing in South Hampstead?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Facade sealing in South Hampstead, done properly
Facade joints are the line of defence between the weather and the building fabric. When a perimeter bead splits or peels, water finds its way behind frames and into the structure. We cut out failed facade joints and reseal them with a facade-grade sealant suited to the movement. The enquiries we see most involve water coming in around window frames and cladding panel joints that have opened up, across stone and brick facade joints, perimeter joints where frames meet the structure and window and door perimeters. A single leaking joint is often how a building in South Hampstead first comes to us: we look at the rest while we are there and tell you what we find.
The ULEZ covers the whole of Greater London, so contractors’ vehicles on a job in South Hampstead 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.
Every job we finish is backed by a 12-month workmanship guarantee, in South Hampstead as everywhere else we work. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Where
- South Hampstead (NW3, NW8, NW6)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Quote
- A fixed quote before we start
- Call
- 01277 525 020
- Updated
- 3 November 2026
Aftercare for building managers
After handover, these steps help:
- Don’t wait for a second leak before calling
- Avoid harsh cleaners on facade sealant
- Add perimeter sealant to planned maintenance checks
- Plan facade sealing alongside redecoration
Keep gutters, sills and drainage paths clear. Good drainage keeps water moving off the facade rather than sitting against the joints.
Tie resealing in with redecoration, cladding repairs or other access. One set-up for several trades saves money and limits disruption.
Mastic packages on South Hampstead sites
Site traffic in South Hampstead 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. South Hampstead has a good number of hotels close by, all within 2 miles. Hotel extensions and refits usually have to fit around bookings, so mastic dates are tight.
Units on estates such as Regis Road Business Park, 1.4 miles north-east of South Hampstead, tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal. Extensions at sites like Hospital of St John and St Elizabeth, 0.6 miles to the south of South Hampstead, normally sit beside working departments, and the mastic follows strict access rules.
South Hampstead is about 1 mile south of Hampstead, in Greater London. Any commercial site in South Hampstead is covered. Our Greater London coverage takes in 764 places, large and small.
Business premises anywhere in NW3, NW8 and NW6 are within our area. If your site is on Avenue Road, Acacia Road and Harben Road or close by, send details and we’ll quote for facade joints. Close to South Hampstead, our area also takes in Swiss Cottage (1 mile north), St John's Wood (1 mile south), Haverstock (1 mile east), Belsize Park (1 mile east) and Primrose Hill (1 mile east). Bigger towns within reach include London (4 miles south-east), Kensington (3 miles south-west), St Pancras (3 miles south-east), Shoreditch (4 miles east), Walthamstow (7 miles north-east) and Hoxton (4 miles east).
Around South Hampstead
Around South Hampstead, our work takes us to commercial buildings near Cafe Med pub, St. Mary's Town and Country School and Holy Trinity CofE Primary School, among other places. Also close by are Cecil Sharp House (1.1 miles east) and Primrose Hill (0.6 miles east). There’s a railway station in South Hampstead itself: South Hampstead station. Other landmarks nearby include Isokon Gallery (0.8 miles north-east) and O2 Centre (0.5 miles north-west). Open spaces near South Hampstead include Adelaide Nature Reserve and The Long Water.
What sets the cost
Sealant work doesn’t have a standard rate, since sites vary so much. What we take into account:
- Phasing around occupants
- How accessible the joints are
- Travel to remote or island sites
- Induction, permit and paperwork requirements
There’s no price list, since every building and every scope is different. Call for a quote.
Before you send an enquiry
Diagnosis starts before we arrive. Tell us:
- Whether an asbestos survey exists
- Any dates the work must fit around
- How the joints are reached, and at what height
- The product your specification calls for
To get a fixed quote, phone 01277 525 020 or email the details over with the site address and an outline of the work. You can also send details through our quote form.
What we are called out for in South Hampstead
New sealant run over old sealant rarely holds. Cured silicone won’t accept a new silicone bead, and the patch soon lifts.
Things that typically lead to an enquiry:
- Damp patches beside frames after rain
- Hard, chalky sealant that no longer flexes
- Air leaks through failed facade joints
- Staining on stone next to old sealant
Projects at colleges like City of Westminster College (to the south-west of South Hampstead) tend to run to term dates, so the mastic is planned tightly.
What your quote should include
- How joint depth will be controlled
- Will RAMS and insurance details be available?
- Are they CHAS accredited or on Constructionline?
- Which product they’ll use, and why it suits the joint
Honest limits
Some faults sit outside our scope, and we say so rather than covering them up:
- Installing or repairing glazing systems
- Cracked or spalling substrates that need repair before sealing
- Leaks from roofs, gutters or failed flashings rather than sealant joints
If you are not sure, just call 01277 525 020 or send details through our quote form and we will give you a straight answer.
Joints and surfaces we work on
- Cladding panel joints
- Window and door perimeters
- Shopfront frames
- Perimeter joints where frames meet the structure
- Stone and brick facade joints
- Coping and flashing joints
Your questions answered
Is hospital work, at somewhere like Hospital of St John and St Elizabeth, something you do?
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. Share the building’s contractor rules and we’ll work to them. The ULEZ covers the whole of Greater London, which we allow for
How do we ask for a quote?
There are four steps: send details, get a quote, we seal, guaranteed. Step one needs little more than photographs and a postcode.
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.
What do you charge?
We don’t publish prices, because every site is different. With photos or drawings, we can give you a fixed quote.
Do you use silicone for external joints?
Low-modulus, neutral-cure silicone suits many facade and perimeter joints. Hybrid or MS polymer, polyurethane and polysulphide sealants suit others.
When can you be on site?
We’re in the office from 8am until 5pm, Monday to Friday. Tell us your site hours and access windows and the work will be fitted around them.
How the job changes by surface
Coping and flashing joints
Coping and flashing joints are included where sealant is the specified fix. These joints take full exposure to weather, so preparation and product choice matter.
Cladding panel joints
Where panels are sealed rather than open-jointed, the bead is part of the weather line. We cut out failed joints along their full length and rebuild them to the correct depth.
Also near South Hampstead
Other services in South Hampstead
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 we check in with your contact before moving on to each new area. All of Greater London is in the ULEZ, and kerbside space in South Hampstead can be scarce. Let us know about any on-site parking or loading arrangements when you send the job details.
- Access, site rules and timing are settled with the client up front.
- We only seal when joints are dry and within the product’s temperature range.
- Each joint is cut out and the edges inspected.
- Joints are cleaned, primed if required and fitted with backing rod.
- Sealant is gunned in and tooled hard onto both faces.
- We hand over with our 12-month workmanship guarantee.
Before we start on site
- Have the specification and drawings to hand
- Point out parking and an unloading spot
- Let building users know which areas are affected
Quotes
Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, give us a call on 01277 525 020 or send details through our quote form.