hi aqua,
i have houses like this on my round. they are easier than they look. i used to use a double set of 14' ladders with articulated rubber feet n ladder mitts so i didn't damage the pvc above the windows. now tho i use a standoff bracket, i currently use the microlite but are quite expensive at £114, this i have on my double 10' with articulated feet. articulate feet differ in price, i bought some from the fed for £25 a pair, but paid £40 from browns in bradford, tho these ones are of better quality.