If you’re going to install or replace rain gutters or going to re-
roof I strongly recommend using gutter hangers that have a strap. Try
to avoid using the other types of hangers as much as possible. Here is
an image link to the types of rain gutter hangers:

http://images.oldhouseweb.com/storie...62/fig5678.gif

All types of hangers that do not have straps will eventually sag and
leak from the weight of the water in the gutter and the fact that they
are fastened to the edge of the eave which is the area most
susceptible to wood rot and deterioration. The strapped hangers are
secured to the top of the eave and not the edge. Since the straps have
to be secured to the top of the eave it is a good idea to have the
straps installed when ever replacing your roof especially if you’re
having a tile roof put on so that they are not visible. You should
have straps installed even if you’re not going to replace your rain
gutters so that one day if you do they will be ready.