conny roof prices vary.most can be cleaned to a good standard in 90 mins.that includes setting up and packing away.i use customers outside taps where i can if its a polycarbon roof.£50 is my average price although i charge more if access is a problem and i need ladders.i often surprise myself and get them done in an hour these days if no ladders needed.i use a 5l pressure sprayer with tfr or virosol mixed with water.spray on and then scrub and rinse with wfp.if you use the customers outside tap youll get a much more powerful jet of water from the brush thus cleaning them faster!!carry some extension hose in ya van with hozelock connector on one end and a rectus female connector on the other to connect up to outside taps!i also use em for fascia/soffit cleaning where i can!i include all outside gutters and windows on conservatories in with my roof price.regardsdazmond