Facade and window perimeter sealing in Dulwich, Greater London
Facade joint and window perimeter sealing on commercial buildings in Dulwich. CHAS accredited and fully insured, with a 12-month guarantee.
- Cladding panel joints that have opened up
- Old perimeter mastic that has dried out
- Draughts around frames and panels
Facade sealing for Dulwich sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
How we handle facade sealing in Dulwich
Facade sealants sit in the sun, rain and frost every day, and they wear out over time. How long a joint lasts depends on the movement it takes, its exposure, the product and how well it was installed. When it fails, the whole bead is cut away and the joint rebuilt. If you’re dealing with perimeter joints where frames meet the structure and water coming in around window frames, we can put it right, whatever the surface. Most enquiries from Dulwich start with one failed joint and grow into a wider look at the building: 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 Dulwich 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.
Our workmanship is guaranteed for 12 months, in Dulwich as everywhere else we work. If our installation lets you down in that time, we return and fix it.
- Place
- Dulwich (SE22, SE21, SE23)
- Wider area
- Greater London
- Guarantee
- 12 months on every job
- Quote
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Aftercare for building managers
Cleaning and maintenance staff play a part too. Pass these on to them:
- Report water ingress at frames as soon as it shows
- Keep sills, gutters and drainage paths clear
- Record the product and colour used on each elevation
- Confirm the survey covers external sealants in older buildings
After heavy weather, check vulnerable elevations for signs of water inside. An early report typically means a small reseal rather than a bigger repair.
Deal with sections that fail early as soon as they show. Small repairs stop small leaks becoming large ones.
Places near Dulwich
What else we do in Dulwich
Work for main contractors and building owners
We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Sites in Dulwich can sit alongside others in a wider programme.
CHAS accredited and a Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.
Do you need facade sealing in Dulwich?
Cohesive failure, a split through the middle of the bead, points to an over-stretched joint. The joint may be too narrow, the bead too thin or the sealant the wrong movement class.
If one of these sounds familiar, it’s time for a closer look:
- Damp patches beside frames after rain
- Unsightly perimeter sealant on a visible elevation
- Air leaks through failed facade joints
- Gaps between rainscreen or cladding panels
For contractors refurbishing units at places like Goose Green Trading Estate, 1 mile to the north of Dulwich, the mastic covers cladding panels, roller-door and window perimeters.
What to look for in a quote
- Their pre-qualification and accreditations
- Proof of insurance
- Who will actually carry out the work
- Will RAMS and insurance details be available?
Leave it or put it right?
Patch repairs over old sealant tend to come back. A full cut-out and reseal costs more on the day but lasts much longer, so you aren’t paying for the same joint twice. Access in London is hard enough to arrange once, so while access is arranged it pays to renew all failing joints, not just the worst.
The price depends on how many linear metres there are, how much old material needs removing and the access. Call for a quote once you have the details.
What you get with us
- Joints cleaned back to sound surfaces
- RAL and finish matching where the product range allows
- Products installed to the manufacturer’s instructions
- Constructionline member for supplier checks
Read our cost guide and how we’re accredited.
Surface by surface
Perimeter joints at frames and structure
The joint around a framed system, where it meets the structure, needs sealant. We seal those perimeter joints rather than the system it surrounds.
Cladding panel joints
Panel joints on cladding and rainscreen systems take movement every day. The sealant has to match the movement and the panel finish.
Facade sealing around Dulwich: points for this area
As part of Greater London, Dulwich is inside the ULEZ, which applies to every van on site. Deliveries are booked and storage is tight, so mastic materials come in as needed. There are a number of hotels within about 2 miles of Dulwich. When hotels extend or refit, the work is normally squeezed between peak periods, mastic included.
University estates such as King's College London, 1.7 miles to the north of Dulwich, tend to have a rolling programme of new buildings and refurbishments, each with window perimeters and facade joints to seal. Hotels like Astra Palace Hotel, 1.3 miles to the south of Dulwich, rarely close for long, so refurbishment mastic is phased floor by floor.
Dulwich is about 1 mile south-east of Herne Hill, in Greater London. Across the SE22 postcode area, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Dulwich is one of 764 places in Greater London on our list.
Work on facade joints is covered throughout SE22, SE21 and SE23. If your site is on Court Lane, Druce Road and Boxall Road or close by, we can quote for facade joints. Dulwich sits on or close to the A2216. Just outside Dulwich, we also work in Dulwich Village (1 mile north-west), West Dulwich (1 mile south), Herne Hill (1 mile north-west), Sydenham Hill (1 mile south-east) and Forest Hill (1 mile east). Bigger towns within reach include London (4 miles north), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles north-west), St Pancras (6 miles north) and Shoreditch (6 miles north).
Near you in Dulwich
Recent enquiries here include premises near The Crown and Greyhound pub, Dulwich Park and Alleyn's School. The nearest railway station is West Dulwich station, about 0.7 miles south-west. Nearby you’ll also find Dulwich Community Hospital (0.9 miles north) and Greenwich Castle (4 miles north-east). Open spaces near Dulwich include Knight's Hill and Centre for Wildlife Gardening.
Questions about Dulwich
Will you take on work at estates like Goose Green Trading Estate, close to Dulwich?
Yes. Our area takes in Dulwich and its surroundings, with estates and business parks such as Goose Green Trading Estate included. A few photos and the unit address let us price the work.
Could you schedule work at a campus like King's College London for the vacation?
Yes, holiday working periods are the norm on campus jobs. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.
What site paperwork can you supply?
Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote.
Do you offer coloured sealant?
In many cases, yes. Sealants are made in a wide range of standard colours, and matching to RAL references or nearby finishes is commonly requested. We’ll confirm the colours available for the specified product.
Do you need to see the site first?
Many jobs can be quoted from photographs, drawings or a joint schedule. Where they aren’t, we arrange a site visit.
How long will the new sealant last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Sealant joints are maintenance items, so inspect them regularly.
When can the area be used after sealing?
We will confirm how long the chosen product needs to cure, and flag anything to keep off until it has cured.
How a job runs
In a busy building, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed, then reopened once the sealant allows before the next one starts. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. Let us know about any on-site parking or loading arrangements when you send the job details.
- First we review photos, drawings or what we saw on a visit, and agree how each joint will be reached.
- The old bead is cut away completely, not overlaid.
- Joint faces are cleaned to firm, sound material, with primer where the sealant maker specifies it.
- Backing rod, or bond-breaker tape in shallow joints, limits the depth.
- The new sealant goes in and is tooled firmly onto both faces.
- We walk the finished joints with you before handing over.
What we need from you
- Send any specification or drawings in advance
- Tell us your opening times and when work is allowed
- Send asbestos survey details if the building is pre-2000
Quotes
If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photographs and a few notes.