DIRECT METHOD (BEST)
1.) Bore a plumb hole into your ridge or peak the diameter of the supplied post. Most posts are 3/4" diameter. Larger vanes may require a 7/8" diameter. The thinner diameter rod portion goes up. This is the spindle for the figure.
-Half of the supplied post should go into your roof (not including spindle) with the other half left above the roof.
-A 28″ post is 14″ in /14″ out. A 36″ post is 18″ in / 18″ out. A 48″ post is 24″ in / 24″ out.
-Install a 2×4 with hole bored half way through to seat post if the depth exceeds the existing wood at the peak.
2.) Inject 100% silicone caulking into the holes.
3.) Embed post by pushing it into the hole. Caulk around seal. (Do not hit spindle tip with hammer).
4.) Assemble weathervane onto post. Do you need a different size post? (To Weathervane Posts)