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

Facade Sealing in Cranham

Facade joint and window perimeter sealing on commercial buildings in Cranham and across Greater London. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Discoloured or dirty facade joints
  • Old perimeter mastic that has dried out
  • Cold air coming in at window perimeters
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
Signed off, with 12 months’ guarantee.
Covering the South East & Scotland
CHAS accredited
£5m public liability

Facade sealing for Cranham sites

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

For managing agents and facilities managers

Hotels, schools, healthcare sites, offices and retail units book us directly too. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.

CHAS accredited and a Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.

Facade sealing for commercial buildings in Cranham

External joints face UV, rain, temperature swings and building movement all year. Life depends on movement, weathering, product choice and the quality of the original work. When it fails, the whole bead is cut away and the joint rebuilt. We work on window and door perimeters, coping and flashing joints and stone and brick facade joints, and what we’re called in for most is staining on stone next to old sealant and weathered facade joints that have lost their grip. For commercial sealant work in Cranham, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.

Every London site, Cranham included, is inside the ULEZ, which applies to deliveries and contractors’ vans alike. Add booked delivery slots and limited storage, and a London mastic package needs planning before the first bead.

Every job is signed off with a 12-month guarantee. It’s a plain promise: if our work fails within that year, we put it right.

The Mastic Doctor team beside their liveried vans in front of an office building
Location
Cranham (RM14)
Wider area
Greater London
Guarantee
12 months on every job
Quotes
Quoted before any work starts
Call
01277 525 020
Updated
3 November 2026

Surface by surface

Coping and flashing joints

Where the specification calls for sealant at copings or flashings, we can seal them. They sit in the most exposed positions on the building.

Render and coated surfaces

Rendered and painted facades need a sound edge for the sealant to bond to. Loose coatings are cleaned back first, and areas needing repair are flagged.

What sets the cost

What shapes the price:

  • Induction, permit and paperwork requirements
  • Backing rod, priming and other preparation
  • The total length or number of joints
  • Specialist products, such as fire-rated or hygienic sealants

Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote, and you will have a fixed figure to work with.

Details that help us quote

For an accurate fixed quote, we need a clear picture of the site. Send us:

  • Whether an asbestos survey exists
  • The type of building and who uses it
  • Any dates the work must fit around
  • Access details, including height

Specifications, drawings and tender packages are welcome with any enquiry, and we will price the work to it. For smaller jobs, photos and a description will do.

Questions we are asked in Cranham

Is hospital work, at somewhere like Hartswood Hospital, something you do?

Yes, hospitals are one of the sectors we cover. The estates team’s permit system and infection-control rules come first, and the work is planned around them.

Could you schedule work at a campus like New City College 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.

Which sealant will you use?

A specification, where there is one, decides it. If there isn’t one, it comes down to the joint: its movement, its surfaces and what it has to cope with.

Do you provide access for facade work?

That varies with the building and the access on offer. When you speak to us on 01277 525 020 or email the details over, describe the access.

Is it okay to overlay old mastic?

No. A bead run over old sealant soon lifts. Our method is a full cut-out, cleaning, backing and a new bead.

What do you charge?

There isn’t a price list, as every site differs. Send photos or drawings and we’ll price it at a fixed figure.

Do your applicators hold CSCS cards?

Yes. We use CSCS-carded applicators.

Facade sealing around Cranham: points for this area

The ULEZ covers the whole of Greater London, Cranham 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.

When units on a site such as Childerditch Industrial Park, 2.6 miles to the north-east of Cranham, are refurbished or reclad, the panel joints and window perimeters are part of the mastic package. New wings at hospitals like Hartswood Hospital, 2.9 miles north of Cranham, bring long runs of window and panel joints to seal.

Cranham is about 2 miles east of Hornchurch, in Greater London. Any commercial site in Cranham is covered. We work across 764 places in Greater London, large and small. We also cover London, around 16 miles from Cranham.

Work on facade joints is covered throughout RM14. For a building on Avon Road, Moor Lane and Front Lane or nearby, we can quote for facade joints. Close to Cranham, our area also takes in Upminster (1 mile west), Puddle Dock (1 mile east), Upminster Bridge (1 mile west), North Ockendon (2 miles south-east) and Emerson Park (2 miles north-west). Nearby towns on our patch include Shoreditch (15 miles west), Walthamstow (13 miles west), Hoxton (15 miles west), Whitechapel (15 miles west), Orpington (14 miles south-west) and Plaistow (11 miles west).

What’s near Cranham

Around Cranham, our work takes us to commercial buildings near The James Oglethorpe Primary School, The Crumpled Horn pub and St. Andrew's Park, among other places. Cranham’s nearest station is Upminster station, roughly 0.7 miles west. Well-known places in the area include The Mercury Mall (3.7 miles west) and Upminster Tithe Barn Museum of Nostalgia (0.6 miles north-west). The countryside around Cranham includes Cranham Brickfields.

Map of Cranham © OpenStreetMap contributors

Signs you need facade sealing in Cranham

Product choice matters: an acetoxy cure can mark stone or corrode some metals, and interior products break down outdoors. Most external joints call for a neutral-cure, facade-grade sealant.

These are often picked up first by site or facilities staff:

  • Water coming in around window frames
  • Failed seals around shopfront and entrance frames
  • Air leaks through failed facade joints
  • Cladding panel joints that have opened up

Older buildings in the area around Cranham, such as Hare Hall (3 miles north-west of Cranham), need care when sealed: the product has to suit soft or historic materials.

What to look for in a quote

  • How joint depth will be controlled
  • Whether old or failed sealant will be cut out, not overlaid
  • The named product and why it was chosen
  • Can the work be phased to keep areas open?

How to choose a sealant contractor

Should maintenance staff do it?

For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

Site maintenance staff can often handle a short internal joint. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

Our process

On arrival, we sign in, go through any site induction and check how permits are handled. Everything around the joints gets protected before any cutting starts, and the work normally takes a day or two for a few elevations, and longer where access has to be moved around the building. In Cranham, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.

  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. Each joint is cut out and the edges inspected.
  4. Joints are cleaned, primed if required and fitted with backing rod.
  5. Facade-grade sealant goes in and is tooled to a tidy concave profile.
  6. Once signed off, the work carries our 12-month guarantee.

Getting the site ready

  • Share the asbestos register for older buildings
  • Tell us what induction or permit system the site runs
  • Tell us which areas need to stay in use

Get a fixed quote

To get a fixed quote, phone 01277 525 020 or send photos by email with the site address and an outline of the work. Our quote form is another easy route.

Get a quick quote

Advice

Accreditations

Trusted. Accredited. Insured.