Got a quote request for a block of flats,
One elevation is not accessible with pole system so have been ask to quote for installation of anchor points and carry out clean with harness from inside residents flats,
We have quoted offices with smaller aluminium windows using this method but not residential with large sash,
Any advice welcomed!
We were asked to quoted on cleaning some solar panels fitted to a flat roof on a school building. According to the school they had to have anchor points and in this case a safety cable running between these anchor points. Our harness and lanyard would be attached to the cable.
This installation had to be done by a qualified/certified company, tested and a certificate issued. They then had to have these anchor points tested each year for safety.
The initial installation cost and annual maintenance cost was more than hiring in a cherry picker.
I would imagine the same requirements for installation and annual tests would apply in this instance as well. This isn't a case of bringing your Black and Decker impact drill to work, drilling a few holes and then screwing some eye bolts into a Fisher wall plug.
I don't know much about abseiling, but I would imagine the same anchor requirements on the roof along with an annual test would also apply.
Depending on the number of windows involved, it may be more cost effective to change the windows so they can be cleaned safely from the inside.
I once read that sash windows can be 'stripped' apart which would enable cleaning of the lower window. I don't know how this is done, but I'm sure a sash window repair company would give you a few pointers - this info may not even be correct.
http://sashwindowspecialist.com/diyguide.html