The managing agent for a block off Marsh Wall in E14 sent me a specification last autumn that ran to nine pages and mentioned internal access exactly once, in a subclause, as something the contractor “may need to arrange”. Eighty-four flats. Frameless glass balustrades on every balcony, top-fixed into a stainless base shoe, no maintenance access from the roof and no eyebolts anywhere on the building. The outer faces of those panels had been visibly filthy since handover in 2019 and every contractor before me had priced the job as though a pole from the podium would reach the tenth floor. That’s the job nobody wants to explain to a board of directors, so it keeps getting quoted as though the problem isn’t there.

Why can’t these panels be reached from outside?

Geometry, mostly. A glass balustrade sits at the outer edge of a slab that projects past the building line, so the outer face of the panel is the furthest point on the whole elevation from anything you could stand on. A water-fed pole works up to about the fourth floor in still air on a good day, and it works by reaching up a flat facade. It has nothing to push against once the balcony overhangs.

Above that you’re into a mobile elevating work platform, a cradle, or rope access. All three exist. All three cost money that a service charge budget written in 2018 never contained.

What changed in the design

Older London blocks used solid balustrades or steel railings, both of which look tolerable when dirty. Glass doesn’t. A frameless panel is a design feature meant to disappear, and a disappearing feature that has gone grey draws the eye harder than a painted rail ever did.

Then there’s the base shoe. The stainless channel gripping the bottom of the panel collects water, grit, cigarette ends and the fine dust that comes off every construction site within half a mile. It drains poorly on a lot of installations. Left long enough it stains the glass edge and corrodes the fixings, and by the time anyone notices, the conversation has moved from cleaning to remediation.

Is it lawful to lean over the balustrade and reach down?

You can. I won’t, and I’d argue nobody should be pricing work on the basis that their operatives will.

Reaching over a 1,100mm barrier to clean the face below puts a person’s centre of gravity outside the building with a drop underneath, which is work at height by any reading of the Regulations. The barrier itself is designed to BS 6180 to resist a horizontal line load from people leaning against it. Nothing about that specification anticipates a fifteen-stone operative putting his hips over the top rail while both hands are occupied with a squeegee and a bucket.

The anchor point that isn’t there

Ask a building manager where the eyebolts are and watch the pause. Most residential blocks completed in the last fifteen years have no certified anchor points on balconies at all, because nobody in the design team was made responsible for cleaning the thing they were drawing.

A balustrade fixing is not an anchor. It has never been tested as one, it has no inspection regime under any lifting or fall arrest standard, and a base shoe grouted into a slab edge in wet weather on a Friday afternoon is not something I’d hang a person from. Operatives do it anyway across London every week, tied to a handrail with a lanyard that would swing them into the slab below if it ever took a load. That’s the job as performed on a lot of blocks, and it will keep being performed that way until it kills somebody at Nine Elms and everyone rediscovers their duties.

Who has the right to get into the flat?

The lease decides, and most leases are on the freeholder’s side. A standard residential long lease reserves a right for the landlord and their agents to enter the demised premises on reasonable notice to inspect, repair and maintain the structure and common parts, and the balustrade panel is almost always retained structure rather than demised to the leaseholder. Forty-eight hours’ written notice is the common formulation. Some leases say twenty-four.

That right exists on paper. Exercising it across eighty-four flats on the same Tuesday is a different exercise altogether.

What stops the work happening

Refusals are rare and mostly reasonable. Night shift workers, new babies, someone shielding, a subtenant who was never told and won’t open the door to a stranger in a branded fleece. The real killers are subletting and voids: a flat let on an assured shorthold through an agent who doesn’t answer emails, or an overseas owner whose only UK contact is a management company in Jersey.

On a block near Ponton Road in SW8 we got into 71 of 96 flats on the first pass, 14 more on a Saturday afternoon revisit, and never got into the remaining 11 at all. Those balconies are still dirty. The board’s answer was to publish a photograph of the elevation in the newsletter with the unclean panels obvious, which is the most effective access tool I’ve seen anyone use. Peer pressure beats a legal letter every time and costs nothing.

Notice needs to come from the agent, on the agent’s letterhead, with a date and a two-hour window per flat. A contractor knocking cold gets nowhere and deserves to.

How do you clean a balustrade panel from inside a flat?

Carefully, and with more kit than the job appears to need. The panel’s outer face has to be reached over the top edge, so the working method is a short-reach pole with a swivel head, or a hand-held applicator on an extension handle where the balcony depth allows a person to stand on it and work over the rail without leaning.

Water control governs everything. There is a flat below. Water that runs off the bottom edge of the panel lands on somebody’s furniture, and one soaked sofa on the fourth floor costs more than the entire elevation’s cleaning fee. I work with a low-flow rinse, a microfibre-sleeved applicator carrying most of the solution, and a channel squeegee finishing bottom-up so the residue runs back onto the balcony rather than over the edge.

The sequence I use on an occupied flat

Shoe covers and a runner from the front door to the balcony door before anything else, because these flats are almost always carpeted or engineered oak and a wet bootprint in a hallway ends the relationship with the resident and the agent in one go. Then a look at the balcony floor – composite decking, usually, sometimes tile – and a check for standing water in the base shoe drainage.

Detergent stage on the outer face, dwell, agitate, rinse with deionised water applied sparingly. The inner face gets done at the same visit because the resident will ask, and refusing on the grounds that the specification says outer faces only is technically correct and commercially stupid.

Then the base shoe. Vacuum it, flush it, tell the agent in writing what came out of it. On a Colindale block off Aerodrome Road I pulled enough compacted grit and moss out of the channels to fill two buckets across one elevation, along with a screw that had corroded through. That went in the report. The remediation contract that followed was worth more than three years of cleaning.

Wind is the last variable and the one that ruins schedules. Anything above the twelfth floor on a river-facing block gets a wind speed above what makes fine work possible for a good part of the year, and the honest thing is to build float into the programme rather than promise dates you’ll break.

How should a block budget for this?

Twice a year for outer faces on a tall block, and I’ll defend that against anyone selling quarterly. The internal access burden is the expensive part, not the cleaning, and the marginal appearance gain from four visits over two doesn’t justify putting a stranger into eighty-four homes twice more each year.

Where the money goes

Price it as an access job with a cleaning component attached. Notice letters, a concierge or porter escorted throughout, two operatives so nobody is alone in an occupied flat, a revisit day for missed access, and a written record per flat with time in and out.

The alternative is a MEWP or rope access from outside, and there are blocks where that’s cheaper – low-rise, good hardstanding, no podium deck with a loading limit underneath. Nine floors up on a site with a basement car park below the forecourt, the platform can’t come and the answer is the front door.

Developers keep specifying frameless glass on buildings with no external access provision whatsoever, and the maintenance cost of that decision lands on leaseholders who had no say in it. A cradle track, a set of certified eyebolts on each balcony, or a slab edge detail that lets a pole reach the outer face would each add a modest amount to a build budget and remove a permanent problem. None of them get drawn, because the person specifying the balustrade is not the person who will be knocking on eighty-four doors in year six.

So the flats are the access route, and the whole thing becomes a scheduling exercise dressed up as window cleaning. Letters, keys, escorts, revisits, a spreadsheet with a row per home. That’s the job.

The base shoe on the Marsh Wall block will need stripping and resealing within five years. Nobody has budgeted for that either.