Hope that the lavatory has been installed to meet barrier free requirements:
Page 43 3.8.3.11 Lavatories for clearance requirements:
http://www.safetycodes.ab.ca/Public/..._protected.pdf
And yes you need the pipe insulation, you can get these at places like Wolseley, Allan Forrest Sales, that's usually where I spec my stuff from.
http://www.ipscorp.com/plumbing/truebro/lavguard