Industry to date was 9m
However if you apply Statutory Law the following info should help
When can ladders be used?
Ladders can be used if after assessing the risks the use of more suitable work equipment is not justified because of the low risk and short duration.
You can refer to Working at height Regulations 2005
Section 7 Selection of equipment
Regulation 8(e) REQUIREMENTS FOR LADDERS Schedule 6
http://www.opsi.gov.uk/SI/si2005/20050735.htm#7Also visit the HSE website
http://www.hse.gov.uk/falls/ladders.htmYou can also Google the HSE inspector’s guidance pack online
This is a document that HSE inspectors refer to when visiting sites
HSE TOPIC INSPECTION PACK 2007
In this document they refer that it will be unlikely that after risk assessing that ladders will be suitable over first floor
9 out of ten times water fed pole is going to be the safest method of accessing domestic windows
I would also recommend investing in ladder training
Try contacting
IMPACT43
www.training43.comBWCA
http://www.bwca.co.uk/Or Federation Window Cleaners
http://www.nfmwgc.comHope this helps
Andy