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

Facade and window perimeter sealing in Broad Green, Greater London

Facade joint and window perimeter sealing on commercial buildings in Broad Green. CHAS accredited and fully insured, with a 12-month guarantee.

  • Perimeter sealant that has split or peeled away
  • Old perimeter mastic that has dried out
  • Gaps between rainscreen or cladding panels
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
South East, London & Scotland
CHAS & Constructionline
£5m public liability

Facade sealing in Broad Green

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

Facade sealing for commercial buildings in Broad Green

Facade sealants sit in the sun, rain and frost every day, and they wear out over time. Life depends on movement, weathering, product choice and the quality of the original work. When the time comes, we cut the old sealant out completely and start again. We work on perimeter joints where frames meet the structure, window and door perimeters and coping and flashing joints, and the failures we are asked to look at most are old perimeter mastic that has dried out and cold air coming in at window perimeters. A specialist sealant contractor works differently from a general builder: in Broad Green, that means joint design, primers and backing rod as standard.

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, so tidy, well-planned work matters.

Every job ends the same way: guaranteed. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.

Where
Broad Green (CR0, CR7, CR90)
Wider area
Greater London
Cover
A 12-month guarantee
Price
A fixed quote before we start
Telephone
01277 525 020
Updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Commercial clients in Broad Green

If you look after buildings for someone else, clear figures and clear communication matter. You get a fixed quote, an agreed scope and a walk round at the end, plus a 12-month guarantee.

Housing associations and managing agents often need work done across blocks and communal areas. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.

Aftercare for building managers

Regular inspection catches problems early. In particular:

  • Never let anyone seal over old sealant
  • Inspect facade joints on a regular cycle
  • Record the product and colour used on each elevation
  • Plan facade sealing alongside redecoration

Blocked sills and gutters push water at the joints. Good drainage keeps water moving off the facade.

In pre-2000 buildings, check the asbestos register before old sealant is cut out. Older sealants can contain asbestos.

Quoting for work in Broad Green

Quotes vary with the job. It mainly depends on:

  • Removal of failed or old sealant
  • How accessible the joints are
  • Phasing around occupants
  • The size and state of each joint

A quote for facade joints depends on how many there are, their condition and the access, and any specification that applies. Ask us for a fixed quote.

Sending details for a quote

Whether it’s one area or a whole building, these details speed things up:

  • Asbestos survey details if the building is older
  • Where the site is, with the postcode
  • Approximate linear metres or a joint schedule
  • How the joints are reached, and at what height

Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. To get it moving, call the office on 01277 525 020 or send details through our quote form.

How a job runs

When we get to site, we report to your site contact and complete whatever induction the building runs. Everything around the joints gets protected before anything is cut or cleaned, with the work itself normally taking a day or two for a few elevations, and longer where access has to be moved around the building. For a job in Broad Green, access comes first. Send the building rules and access times with your enquiry.

  1. We plan access and the order of elevations with the client.
  2. We only seal when joints are dry and within the product’s temperature range.
  3. We remove the old bead and check the edges are sound.
  4. Faces are cleaned, primed where needed and backed.
  5. Sealant is gunned in and tooled hard onto both faces.
  6. We hand over with our 12-month workmanship guarantee.

Before we start on site

  • Tell us which areas need to stay in use
  • Point out parking and an unloading spot
  • Let us know about inductions and permits

Quotes

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.

Ask for a quote

Advice

FAQs: Broad Green

Can you work around term dates at a campus such as Croydon College?

Yes. We plan campus work around teaching, exams and residence turnarounds. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

Does your area include sites such as Pilton Industrial Estate, near Broad Green?

Yes, sites like Pilton Industrial Estate are within our area, along with the rest of Broad Green. To start, just call the office on 01277 525 020 or email drawings and photos with the unit, the joints involved and your access times.

Can you look at water coming in around a frame?

Yes. Photos help, and you can give us a call on 01277 525 020 or send details through our quote form to arrange a visit. Many frame leaks are sealant failures, though not all, and we will tell you which.

What hours do you work?

We’re in the office from 8am until 5pm, Monday to Friday. Let us know your site hours and access windows, and the work will be planned around them.

How is access to upper-level joints handled?

We agree access with the client at the start. Tell us about access: existing scaffold, what you are arranging and any site restrictions.

How long before the joints can be used?

The product and site conditions decide that. Some products skin over quickly but need longer to cure fully, and we confirm it before leaving site.

Are you CHAS accredited and on Constructionline?

Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.

Building and refurbishing in Broad Green

As part of Greater London, Broad Green 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. A 2-mile radius around Broad Green 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.

For contractors at a college like Croydon College (1 mile south-east of Broad Green), perimeters and internal sealant are timed for the holidays. Recladding or extending a unit at a site like Pilton Industrial Estate, 0.7 miles to the south of Broad Green, brings panel joints and frame perimeters into the programme. On a healthcare site such as Croydon University Hospital, less than half a mile north-west of Broad Green, new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully.

Broad Green is about 6 miles south of Stockwell, in Greater London. We cover commercial sites throughout Broad Green, for single jobs and planned programmes alike. Broad Green is one of 764 places we cover in Greater London for facade joints. For work in that direction, see our London page.

Business premises anywhere in CR0, CR7 and CR90 are within our area for facade joints. Buildings on York Road, Nova Road and Lion Road are within our area for facade joints. We also cover Old Town (1 mile south), Beddington (2 miles south-west), Waddon (2 miles south), Bandonhill (2 miles south-west) and Wallington (2 miles south-west). Bigger towns within reach include London (8 miles north), City of Westminster (9 miles north), Marylebone (9 miles north), Kensington (9 miles north-west), St Pancras (10 miles north) and Shoreditch (10 miles north).

What’s near Broad Green

Recent enquiries here include premises near Harris Invictus Academy Croydon, The Half Moon pub and Waddon Ponds and the streets around them. The nearest railway station is West Croydon station, about 0.6 miles south. Well-known places in the area include Centrale Croydon (0.8 miles south) and Croydon University Hospital (under half a mile north-west). Not far away are Duppas Hill and Biggin Wood.

Map of Broad Green © OpenStreetMap contributors

When something else is needed

We check first that sealant really is the fix. It won’t put right:

  • Render or concrete edges that have broken away
  • Work on the window or framing system itself
  • Arranging specialist high-level access, which is planned with the client

If in doubt, give us a call on 01277 525 020 or email drawings and photos and we will say what we think.

Where we work in Broad Green

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

How the job changes by surface

Render and coated surfaces

Sealant can only hold as well as the render or paint beneath it. We remove flaking material so the bead bonds to a firm surface.

Brick and stone facades

On masonry, the sealant has to suit a porous, textured surface. Neutral-cure products are used because acetoxy types can mark some stone, with primer where its maker specifies.

Accreditations

Trusted. Accredited. Insured.