Well you dont need to take it onto the roof for a strat 
seriously tho, why get a vac then hump it onto a roof 




?
just get a 135 deg end nozzle you can then get over lower levels no problem.
the jury is still out (for me) on cheap vacs - the Omnovac will pull out plugs of earth and weed from 4 storeys up ( as shown on other threads ) and a totally blocked swan neck with a 2 ft long 'weed/plant' other than ice the Omni vac never fails to clear a gutter no matter what the weather ( be aware of using 240v in the rain ! ) and been happily working for over 2 years without any problems - time will tell weather the clarke will last as long....
Darran
Explain to me how you move a vac along a gutter if it is so powerful that it can pull a two foot clump out of a downspout?
Do you think its possible for such a vaccum to pull a gutter out of its retaining clips? If not, why not? I reckon
its harder to pull a two foot clump out than pull a gutter out of its retaining clips?
As you'll well know, the vac pulls your poles into the gutter making it hard to move along. I took the vac onto an extension as its was a three storey house (although you can't see that from the pics) and its very difficult to move along when your poles are almost horizontal. I thought i made that clear in my comment with the pic.
Like anything, a gutter vac is an invaluable aid to cleaning out gutters and does it far better than doing it by hand with a ladder and scoop. But potential gutter vac users should beware, if you hit loose end caps, downspout fittings then you will have to get up the ladder to put them right if you knock them off.
If you've been working with an Omni for two years then i'm sure you're far more experienced than me at doing it. Pity you havn't posted up any of your experiences for the OP who needs convincing that they're any good.
Regarding whether the clarke will last two years, well the consumer protection act tells me that it should do, so i'll go with that.
When mine won't clear a gutter i'll be the first to tell you. And when it does at four levels i'll post some more pics if i go up the ladder. Oh, no i can't go up !! Sod it , i will , with a camera just to show ya !!!
