Balcony cleaning failures most commonly result in one of three problems: water damage to the unit below, damage to the balcony membrane or surface, or a worker injury that creates liability for the building owner or unit owner. All three are predictable and preventable — and the warning signs are visible before the job starts.
“The company I’d never hire is the one that shows up with a commercial-grade pressure washer and no conversation about the drain. That one interaction tells me they’ve done this job many times without thinking about it. And if the drain is slow — which it often is on balconies that haven’t been cleaned recently — the next call they make is to say ‘sorry about the flooding’ to the unit below.”
— Yusuf Abara, certified exterior cleaning specialist and rope access technician with 14 years of experience in high-rise balcony and building exterior cleaning in the local area
Red Flags Before You Hire
No mention of drain management. A company that proposes pressure washing a balcony without any discussion of how drainage will be managed is planning to push water over the railing if the drain is slow or blocked. This is the single most common balcony cleaning failure. Any professional company raises it proactively — “we’ll check the drain before we start” is the minimum.
Unable to confirm Working at Heights certification. Under your region law, any worker who may fall more than 3 meters must hold Working at Heights certification. A company that can’t confirm this for elevated balcony work is operating illegally and creating uninsured liability exposure.
No insurance documentation provided or available. Balcony cleaning involves elevated work and the potential for water damage to adjacent units. A company that can’t immediately provide a certificate of insurance should not be doing this work.
Proposing the same high-pressure method for all surfaces. A company that uses the same high-pressure pressure washer on every balcony — regardless of whether the surface is exposed concrete, a coated membrane, or tile — doesn’t understand what they’re cleaning. High pressure on a traffic-bearing waterproofing membrane damages it. Ask what they’d use on a coated surface.
No mention of protecting the balcony below or notifying neighbors. Professional companies include this as standard practice. A company that doesn’t raise it when you’re booking has either never had a flooding incident or doesn’t discuss it because they expect it to happen and move on.
Cash only, no written quote. Professional exterior cleaning companies operate with quotes, invoices, and receipts. Cash-only operators have no accountability for damage.
Very low price with no description of method. Balcony cleaning done properly — with drain management, appropriate chemistry, certified workers, and insured operations — has a cost floor. A dramatically below-market price typically reflects absent insurance, uncertified workers, or a pressure washer and no drainage protocol.
Red Flags During the Job
Starting the wash before checking the drain. Ask the worker to confirm the drain is clear before any water is applied. If they start washing immediately without checking, stop them and ask.
Using maximum pressure on any coated or tiled surface. If you can hear the pressure washer at full intensity and see the surface is a coated membrane or tile, ask the worker to confirm the PSI and method are appropriate.
No worker on the balcony below during a building-wide program. In a professional building-wide program, the drainage management is coordinated between floors. If water is being applied to upper balconies with no awareness of what’s happening below, ask how drainage is being managed.
Leaving without confirming the drain is flowing freely. Before the crew leaves, confirm that the drain is clear and flowing. A partially cleared drain that blocks again in the next rain creates the same overflow problem.
Related Questions
- Questions to Ask a Balcony Cleaning Company Before You Hire One
- Questions to Ask a Balcony Cleaning Company About Methods and Equipment
- What to Do If a Balcony Cleaning Company Causes Damage
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